| Commit message (Collapse) | Author | Age | Files | Lines |
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We currently rely on being able to kmap all of the pages in an async
read or write request. If you're on a machine that has CONFIG_HIGHMEM
set then that kmap space is limited, sometimes to as low as 512 slots.
With 512 slots, we can only support up to a 2M r/wsize, and that's
assuming that we can get our greedy little hands on all of them. There
are other users however, so it's possible we'll end up stuck with a
size that large.
Since we can't handle a rsize or wsize larger than that currently, cap
those options at the number of kmap slots we have. We could consider
capping it even lower, but we currently default to a max of 1M. Might as
well allow those luddites on 32 bit arches enough rope to hang
themselves.
A more robust fix would be to teach the send and receive routines how
to contend with an array of pages so we don't need to marshal up a kvec
array at all. That's a fairly significant overhaul though, so we'll need
this limit in place until that's ready.
Cc: <stable@vger.kernel.org>
Reported-by: Jian Li <jiali@redhat.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
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A user reported a crash in cifs_demultiplex_thread() caused by an
incorrectly set mid_q_entry->callback() function. It appears that the
callback assignment made in cifs_call_async() was not flushed back to
memory suggesting that a memory barrier was required here. Changing the
code to make sure that the mid_q_entry structure was completely
initialised before it was added to the pending queue fixes the problem.
Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <smfrench@gmail.com>
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Caused, AFAICS, by mismerge in commit ff9cb1c4eead ("Merge branch
'for_linus' into for_linus_merged")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org # 3.3+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Merge Andrew's remaining patches for 3.5:
"Nine fixes"
* Merge emailed patches from Andrew Morton <akpm@linux-foundation.org>: (9 commits)
mm: fix lost kswapd wakeup in kswapd_stop()
m32r: make memset() global for CONFIG_KERNEL_BZIP2=y
m32r: add memcpy() for CONFIG_KERNEL_GZIP=y
m32r: consistently use "suffix-$(...)"
m32r: fix 'fix breakage from "m32r: use generic ptrace_resume code"' fallout
m32r: fix pull clearing RESTORE_SIGMASK into block_sigmask() fallout
m32r: remove duplicate definition of PTRACE_O_TRACESYSGOOD
mn10300: fix "pull clearing RESTORE_SIGMASK into block_sigmask()" fallout
bootmem: make ___alloc_bootmem_node_nopanic() really nopanic
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Offlining memory may block forever, waiting for kswapd() to wake up
because kswapd() does not check the event kthread->should_stop before
sleeping.
The proper pattern, from Documentation/memory-barriers.txt, is:
--- waker ---
event_indicated = 1;
wake_up_process(event_daemon);
--- sleeper ---
for (;;) {
set_current_state(TASK_UNINTERRUPTIBLE);
if (event_indicated)
break;
schedule();
}
set_current_state() may be wrapped by:
prepare_to_wait();
In the kswapd() case, event_indicated is kthread->should_stop.
=== offlining memory (waker) ===
kswapd_stop()
kthread_stop()
kthread->should_stop = 1
wake_up_process()
wait_for_completion()
=== kswapd_try_to_sleep (sleeper) ===
kswapd_try_to_sleep()
prepare_to_wait()
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schedule()
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.
finish_wait()
The schedule() needs to be protected by a test of kthread->should_stop,
which is wrapped by kthread_should_stop().
Reproducer:
Do heavy file I/O in background.
Do a memory offline/online in a tight loop
Signed-off-by: Aaditya Kumar <aaditya.kumar@ap.sony.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix the m32r compile error:
arch/m32r/boot/compressed/misc.c:31:14: error: static declaration of 'memset' follows non-static declaration
make[5]: *** [arch/m32r/boot/compressed/misc.o] Error 1
make[4]: *** [arch/m32r/boot/compressed/vmlinux] Error 2
by removing the static keyword.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix the m32r link error:
LD arch/m32r/boot/compressed/vmlinux
arch/m32r/boot/compressed/misc.o: In function `zlib_updatewindow':
misc.c:(.text+0x190): undefined reference to `memcpy'
misc.c:(.text+0x190): relocation truncated to fit: R_M32R_26_PLTREL against undefined symbol `memcpy'
make[5]: *** [arch/m32r/boot/compressed/vmlinux] Error 1
by adding our own implementation of memcpy().
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit a556bec9955c ("m32r: fix arch/m32r/boot/compressed/Makefile")
changed "$(suffix_y)" to "$(suffix-y)", but didn't update any location
where "suffix_y" is set, causing:
make[5]: *** No rule to make target `arch/m32r/boot/compressed/vmlinux.bin.', needed by `arch/m32r/boot/compressed/piggy.o'. Stop.
make[4]: *** [arch/m32r/boot/compressed/vmlinux] Error 2
make[3]: *** [zImage] Error 2
Correct the other locations to fix this.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit acdc0d5ef9dd ('m32r: fix breakage from "m32r: use generic
ptrace_resume code"') tried to fix a problem in commit e34112e3966fc
("m32r: use generic ptrace_resume code") by returning values in a
function returning void, causing:
arch/m32r/kernel/ptrace.c: In function 'user_enable_single_step':
arch/m32r/kernel/ptrace.c:594:3: warning: 'return' with a value, in function returning void [enabled by default]
arch/m32r/kernel/ptrace.c:598:3: warning: 'return' with a value, in function returning void [enabled by default]
arch/m32r/kernel/ptrace.c:601:3: warning: 'return' with a value, in function returning void [enabled by default]
arch/m32r/kernel/ptrace.c:604:2: warning: 'return' with a value, in function returning void [enabled by default]
Remove the unneeded return values.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit a610d6e672d6 ("pull clearing RESTORE_SIGMASK into
block_sigmask()") caused:
arch/m32r/kernel/signal.c: In function 'handle_signal':
arch/m32r/kernel/signal.c:289:6: warning: 'return' with a value, in function returning void [enabled by default]
Remove the return value it forgot to remove.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix the m32r build warning:
include/linux/ptrace.h:66:0: warning: "PTRACE_O_TRACESYSGOOD" redefined [enabled by default]
arch/m32r/include/asm/ptrace.h:117:0: note: this is the location of the previous definition
We already have it in <linux/ptrace.h>, so remove it from <asm/ptrace.h>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit a610d6e672d6 ("pull clearing RESTORE_SIGMASK into
block_sigmask()") caused:
arch/mn10300/kernel/signal.c: In function 'handle_signal':
arch/mn10300/kernel/signal.c:462:3: warning: 'return' with no value, in function returning non-void [-Wreturn-type]
Add the missing return values, and restore the indentation while we're
at it.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: David Howells <dhowells@redhat.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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In reaction to commit 99ab7b19440a ("mm: sparse: fix usemap allocation
above node descriptor section") Johannes said:
| while backporting the below patch, I realised that your fix busted
| f5bf18fa22f8 again. The problem was not a panicking version on
| allocation failure but when the usemap size was too large such that
| goal + size > limit triggers the BUG_ON in the bootmem allocator. So
| we need a version that passes limit ONLY if the usemap is smaller than
| the section.
after checking the code, the name of ___alloc_bootmem_node_nopanic()
does not reflect the fact.
Make bootmem really not panic.
Hope will kill bootmem sooner.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: <stable@vger.kernel.org> [3.3.x, 3.4.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull a last-minute PM update from Rafael J. Wysocki:
"This renames CAP_EPOLLWAKEUP to CAP_BLOCK_SUSPEND to encourage future
reuse of the capability in question in related cases."
* tag 'pm-post-3.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM: Rename CAP_EPOLLWAKEUP to CAP_BLOCK_SUSPEND
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As discussed in
http://thread.gmane.org/gmane.linux.kernel/1249726/focus=1288990,
the capability introduced in 4d7e30d98939a0340022ccd49325a3d70f7e0238
to govern EPOLLWAKEUP seems misnamed: this capability is about governing
the ability to suspend the system, not using a particular API flag
(EPOLLWAKEUP). We should make the name of the capability more general
to encourage reuse in related cases. (Whether or not this capability
should also be used to govern the use of /sys/power/wake_lock is a
question that needs to be separately resolved.)
This patch renames the capability to CAP_BLOCK_SUSPEND. In order to ensure
that the old capability name doesn't make it out into the wild, could you
please apply and push up the tree to ensure that it is incorporated
for the 3.5 release.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
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Pull networking fixes from David Miller:
1) IPVS oops'ers:
a) Should not reset skb->nf_bridge in forwarding hook (Lin Ming)
b) 3.4 commit can cause ip_vs_control_cleanup to be invoked after
the ipvs_core_ops are unregistered during rmmod (Julian ANastasov)
2) ixgbevf bringup failure can crash in TX descriptor cleanup
(Alexander Duyck)
3) AX25 switch missing break statement hoses ROSE sockets (Alan Cox)
4) CAIF accesses freed per-net memory (Sjur Brandeland)
5) Network cgroup code has out-or-bounds accesses (Eric DUmazet), and
accesses freed memory (Gao Feng)
6) Fix a crash in SCTP reported by Dave Jones caused by freeing an
association still on a list (Neil HOrman)
7) __netdev_alloc_skb() regresses on GFP_DMA using drivers because that
GFP flag is not being retained for the allocation (Eric Dumazet).
8) Missing NULL hceck in sch_sfb netlink message parsing (Alan Cox)
9) bnx2 crashes because TX index iteration is not bounded correctly
(Michael Chan)
10) IPoIB generates warnings in TCP queue collapsing (via
skb_try_coalesce) because it does not set skb->truesize correctly
(Eric Dumazet)
11) vlan_info objects leak for the implicit vlan with ID 0 (Amir
Hanania)
12) A fix for TX time stamp handling in gianfar does not transfer socket
ownership from one packet to another correctly, resulting in a
socket write space imbalance (Eric Dumazet)
13) Julia Lawall found several cases where we do a list iteration, and
then at the loop termination unconditionally assume we ended up with
real list object, rather than the list head itself (CNIC, RXRPC,
mISDN).
14) The bonding driver handles procfs moving incorrectly when a device
it manages is moved from one namespace to another (Eric Biederman)
15) Missing memory barriers in stmmac descriptor accesses result in
various crashes (Deepak Sikri)
16) Fix handling of broadcast packets in batman-adv (Simon Wunderlich)
17) Properly check the sanity of sendmsg() lengths in ieee802154's
dgram_sendmsg(). Dave Jones and others have hit and reported this
bug (Sasha Levin)
18) Some drivers (b44 and b43legacy) on 64-bit machines stopped working
because of how netdev_alloc_skb() was adjusted. Such drivers should
now use alloc_skb() for obtaining bounce buffers. (Eric Dumazet)
19) atl1c mis-managed it's link state in that it stops the queue by hand
on link down. The generic networking takes care of that and this
double stop locks the queue down. So simply removing the driver's
queue stop call fixes the problem (Cloud Ren)
20) Fix out-of-memory due to mis-accounting in net_em packet scheduler
(Eric Dumazet)
21) If DCB and SR-IOV are configured at the same time in IXGBE the chip
will hang because this is not supported (Alexander Duyck)
22) A commit to stop drivers using netdev->base_addr broke the CNIC
driver (Michael Chan)
23) Timeout regression in ipset caused by an attempt to fix an overflow
bug (Jozsef Kadlecsik).
24) mac80211 minstrel code allocates memory using incorrect size
(Thomas Huehn)
25) llcp_sock_getname() needs to check for a NULL device otherwise we
OOPS (Sasha Levin)
26) mwifiex leaks memory (Bing Zhao)
27) Propagate iwlwifi fix to iwlegacy, even when we're not associated
we need to monitor for stuck queues in the watchdog handler
(Stanislaw Geuszka)
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (44 commits)
ipvs: fix oops in ip_vs_dst_event on rmmod
ipvs: fix oops on NAT reply in br_nf context
ixgbevf: Fix panic when loading driver
ax25: Fix missing break
MAINTAINERS: reflect actual changes in IEEE 802.15.4 maintainership
caif: Fix access to freed pernet memory
net: cgroup: fix access the unallocated memory in netprio cgroup
ixgbevf: Prevent RX/TX statistics getting reset to zero
sctp: Fix list corruption resulting from freeing an association on a list
net: respect GFP_DMA in __netdev_alloc_skb()
e1000e: fix test for PHY being accessible on 82577/8/9 and I217
e1000e: Correct link check logic for 82571 serdes
sch_sfb: Fix missing NULL check
bnx2: Fix bug in bnx2_free_tx_skbs().
IPoIB: fix skb truesize underestimatiom
net: Fix memory leak - vlan_info struct
gianfar: fix potential sk_wmem_alloc imbalance
drivers/net/ethernet/broadcom/cnic.c: remove invalid reference to list iterator variable
net/rxrpc/ar-peer.c: remove invalid reference to list iterator variable
drivers/isdn/mISDN/stack.c: remove invalid reference to list iterator variable
...
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Pablo Neira Ayuso says:
====================
I know that we're in fairly late stage to request pulls, but the IPVS people
pinged me with little patches with oops fixes last week.
One of them was recently introduced (during the 3.4 development cycle) while
cleaning up the IPVS netns support. They are:
* Fix one regression introduced in 3.4 while cleaning up the
netns support for IPVS, from Julian Anastasov.
* Fix one oops triggered due to resetting the conntrack attached to the skb
instead of just putting it in the forward hook, from Lin Ming. This problem
seems to be there since 2.6.37 according to Simon Horman.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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After commit 39f618b4fd95ae243d940ec64c961009c74e3333 (3.4)
"ipvs: reset ipvs pointer in netns" we can oops in
ip_vs_dst_event on rmmod ip_vs because ip_vs_control_cleanup
is called after the ipvs_core_ops subsys is unregistered and
net->ipvs is NULL. Fix it by exiting early from ip_vs_dst_event
if ipvs is NULL. It is safe because all services and dests
for the net are already freed.
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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IPVS should not reset skb->nf_bridge in FORWARD hook
by calling nf_reset for NAT replies. It triggers oops in
br_nf_forward_finish.
[ 579.781508] BUG: unable to handle kernel NULL pointer dereference at 0000000000000004
[ 579.781669] IP: [<ffffffff817b1ca5>] br_nf_forward_finish+0x58/0x112
[ 579.781792] PGD 218f9067 PUD 0
[ 579.781865] Oops: 0000 [#1] SMP
[ 579.781945] CPU 0
[ 579.781983] Modules linked in:
[ 579.782047]
[ 579.782080]
[ 579.782114] Pid: 4644, comm: qemu Tainted: G W 3.5.0-rc5-00006-g95e69f9 #282 Hewlett-Packard /30E8
[ 579.782300] RIP: 0010:[<ffffffff817b1ca5>] [<ffffffff817b1ca5>] br_nf_forward_finish+0x58/0x112
[ 579.782455] RSP: 0018:ffff88007b003a98 EFLAGS: 00010287
[ 579.782541] RAX: 0000000000000008 RBX: ffff8800762ead00 RCX: 000000000001670a
[ 579.782653] RDX: 0000000000000000 RSI: 000000000000000a RDI: ffff8800762ead00
[ 579.782845] RBP: ffff88007b003ac8 R08: 0000000000016630 R09: ffff88007b003a90
[ 579.782957] R10: ffff88007b0038e8 R11: ffff88002da37540 R12: ffff88002da01a02
[ 579.783066] R13: ffff88002da01a80 R14: ffff88002d83c000 R15: ffff88002d82a000
[ 579.783177] FS: 0000000000000000(0000) GS:ffff88007b000000(0063) knlGS:00000000f62d1b70
[ 579.783306] CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b
[ 579.783395] CR2: 0000000000000004 CR3: 00000000218fe000 CR4: 00000000000027f0
[ 579.783505] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 579.783684] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 579.783795] Process qemu (pid: 4644, threadinfo ffff880021b20000, task ffff880021aba760)
[ 579.783919] Stack:
[ 579.783959] ffff88007693cedc ffff8800762ead00 ffff88002da01a02 ffff8800762ead00
[ 579.784110] ffff88002da01a02 ffff88002da01a80 ffff88007b003b18 ffffffff817b26c7
[ 579.784260] ffff880080000000 ffffffff81ef59f0 ffff8800762ead00 ffffffff81ef58b0
[ 579.784477] Call Trace:
[ 579.784523] <IRQ>
[ 579.784562]
[ 579.784603] [<ffffffff817b26c7>] br_nf_forward_ip+0x275/0x2c8
[ 579.784707] [<ffffffff81704b58>] nf_iterate+0x47/0x7d
[ 579.784797] [<ffffffff817ac32e>] ? br_dev_queue_push_xmit+0xae/0xae
[ 579.784906] [<ffffffff81704bfb>] nf_hook_slow+0x6d/0x102
[ 579.784995] [<ffffffff817ac32e>] ? br_dev_queue_push_xmit+0xae/0xae
[ 579.785175] [<ffffffff8187fa95>] ? _raw_write_unlock_bh+0x19/0x1b
[ 579.785179] [<ffffffff817ac417>] __br_forward+0x97/0xa2
[ 579.785179] [<ffffffff817ad366>] br_handle_frame_finish+0x1a6/0x257
[ 579.785179] [<ffffffff817b2386>] br_nf_pre_routing_finish+0x26d/0x2cb
[ 579.785179] [<ffffffff817b2cf0>] br_nf_pre_routing+0x55d/0x5c1
[ 579.785179] [<ffffffff81704b58>] nf_iterate+0x47/0x7d
[ 579.785179] [<ffffffff817ad1c0>] ? br_handle_local_finish+0x44/0x44
[ 579.785179] [<ffffffff81704bfb>] nf_hook_slow+0x6d/0x102
[ 579.785179] [<ffffffff817ad1c0>] ? br_handle_local_finish+0x44/0x44
[ 579.785179] [<ffffffff81551525>] ? sky2_poll+0xb35/0xb54
[ 579.785179] [<ffffffff817ad62a>] br_handle_frame+0x213/0x229
[ 579.785179] [<ffffffff817ad417>] ? br_handle_frame_finish+0x257/0x257
[ 579.785179] [<ffffffff816e3b47>] __netif_receive_skb+0x2b4/0x3f1
[ 579.785179] [<ffffffff816e69fc>] process_backlog+0x99/0x1e2
[ 579.785179] [<ffffffff816e6800>] net_rx_action+0xdf/0x242
[ 579.785179] [<ffffffff8107e8a8>] __do_softirq+0xc1/0x1e0
[ 579.785179] [<ffffffff8135a5ba>] ? trace_hardirqs_off_thunk+0x3a/0x6c
[ 579.785179] [<ffffffff8188812c>] call_softirq+0x1c/0x30
The steps to reproduce as follow,
1. On Host1, setup brige br0(192.168.1.106)
2. Boot a kvm guest(192.168.1.105) on Host1 and start httpd
3. Start IPVS service on Host1
ipvsadm -A -t 192.168.1.106:80 -s rr
ipvsadm -a -t 192.168.1.106:80 -r 192.168.1.105:80 -m
4. Run apache benchmark on Host2(192.168.1.101)
ab -n 1000 http://192.168.1.106/
ip_vs_reply4
ip_vs_out
handle_response
ip_vs_notrack
nf_reset()
{
skb->nf_bridge = NULL;
}
Actually, IPVS wants in this case just to replace nfct
with untracked version. So replace the nf_reset(skb) call
in ip_vs_notrack() with a nf_conntrack_put(skb->nfct) call.
Signed-off-by: Lin Ming <mlin@ss.pku.edu.cn>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch addresses a kernel panic seen when setting up the interface.
Specifically we see a NULL pointer dereference on the Tx descriptor cleanup
path when enabling interrupts. This change corrects that so it cannot
occur.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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At least there seems to be no reason to disallow ROSE sockets when
NETROM is loaded.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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As the life flows, developers priorities shifts a bit. Reflect actual
changes in the maintainership of IEEE 802.15.4 code: Sergey mostly
stopped cared about this piece of code. Most of the work recently was
done by Alexander, so put him to the MAINTAINERS file to reflect his
status and to ease the life of respective patches.
Also add new net/mac802154/ directory to the list of maintained files.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net
Jeff Kirsher says:
====================
This series contains fixes to e1000e.
...
Bruce Allan (1):
e1000e: fix test for PHY being accessible on 82577/8/9 and I217
Tushar Dave (1):
e1000e: Correct link check logic for 82571 serdes
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Occasionally, the PHY can be initially inaccessible when the first read of
a PHY register, e.g. PHY_ID1, happens (signified by the returned value
0xFFFF) but subsequent accesses of the PHY work as expected. Add a retry
counter similar to how it is done in the generic e1000_get_phy_id().
Also, when the PHY is completely inaccessible (i.e. when subsequent reads
of the PHY_IDx registers returns all F's) and the MDIO access mode must be
set to slow before attempting to read the PHY ID again, the functions that
do these latter two actions expect the SW/FW/HW semaphore is not already
set so the semaphore must be released before and re-acquired after calling
them otherwise there is an unnecessarily inordinate amount of delay during
device initialization.
Reported-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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SYNCH bit and IV bit of RXCW register are sticky. Before examining these bits,
RXCW should be read twice to filter out one-time false events and have correct
values for these bits. Incorrect values of these bits in link check logic can
cause weird link stability issues if auto-negotiation fails.
CC: stable <stable@vger.kernel.org> [2.6.38+]
Reported-by: Dean Nelson <dnelson@redhat.com>
Signed-off-by: Tushar Dave <tushar.n.dave@intel.com>
Reviewed-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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unregister_netdevice_notifier() must be called before
unregister_pernet_subsys() to avoid accessing already freed
pernet memory. This fixes the following oops when doing rmmod:
Call Trace:
[<ffffffffa0f802bd>] caif_device_notify+0x4d/0x5a0 [caif]
[<ffffffff81552ba9>] unregister_netdevice_notifier+0xb9/0x100
[<ffffffffa0f86dcc>] caif_device_exit+0x1c/0x250 [caif]
[<ffffffff810e7734>] sys_delete_module+0x1a4/0x300
[<ffffffff810da82d>] ? trace_hardirqs_on_caller+0x15d/0x1e0
[<ffffffff813517de>] ? trace_hardirqs_on_thunk+0x3a/0x3
[<ffffffff81696bad>] system_call_fastpath+0x1a/0x1f
RIP
[<ffffffffa0f7f561>] caif_get+0x51/0xb0 [caif]
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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there are some out of bound accesses in netprio cgroup.
now before accessing the dev->priomap.priomap array,we only check
if the dev->priomap exist.and because we don't want to see
additional bound checkings in fast path, so we should make sure
that dev->priomap is null or array size of dev->priomap.priomap
is equal to max_prioidx + 1;
so in write_priomap logic,we should call extend_netdev_table when
dev->priomap is null and dev->priomap.priomap_len < max_len.
and in cgrp_create->update_netdev_tables logic,we should call
extend_netdev_table only when dev->priomap exist and
dev->priomap.priomap_len < max_len.
and it's not needed to call update_netdev_tables in write_priomap,
we can only allocate the net device's priomap which we change through
net_prio.ifpriomap.
this patch also add a return value for update_netdev_tables &
extend_netdev_table, so when new_priomap is allocated failed,
write_priomap will stop to access the priomap,and return -ENOMEM
back to the userspace to tell the user what happend.
Change From v3:
1. add rtnl protect when reading max_prioidx in write_priomap.
2. only call extend_netdev_table when map->priomap_len < max_len,
this will make sure array size of dev->map->priomap always
bigger than any prioidx.
3. add a function write_update_netdev_table to make codes clear.
Change From v2:
1. protect extend_netdev_table by RTNL.
2. when extend_netdev_table failed,call dev_put to reduce device's refcount.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Eric Dumazet <edumazet@google.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The commit 4197aa7bb81877ebb06e4f2cc1b5fea2da23a7bd implements 64 bit
per ring statistics. But the driver resets the 'total_bytes' and
'total_packets' from RX and TX rings in the RX and TX interrupt
handlers to zero. This results in statistics being lost and user space
reporting RX and TX statistics as zero. This patch addresses the
issue by preventing the resetting of RX and TX ring statistics to
zero.
Signed-off-by: Narendra K <narendra_k@dell.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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A few days ago Dave Jones reported this oops:
[22766.294255] general protection fault: 0000 [#1] PREEMPT SMP
[22766.295376] CPU 0
[22766.295384] Modules linked in:
[22766.387137] ffffffffa169f292 6b6b6b6b6b6b6b6b ffff880147c03a90
ffff880147c03a74
[22766.387135] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000
[22766.387136] Process trinity-watchdo (pid: 10896, threadinfo ffff88013e7d2000,
[22766.387137] Stack:
[22766.387140] ffff880147c03a10
[22766.387140] ffffffffa169f2b6
[22766.387140] ffff88013ed95728
[22766.387143] 0000000000000002
[22766.387143] 0000000000000000
[22766.387143] ffff880003fad062
[22766.387144] ffff88013c120000
[22766.387144]
[22766.387145] Call Trace:
[22766.387145] <IRQ>
[22766.387150] [<ffffffffa169f292>] ? __sctp_lookup_association+0x62/0xd0
[sctp]
[22766.387154] [<ffffffffa169f2b6>] __sctp_lookup_association+0x86/0xd0 [sctp]
[22766.387157] [<ffffffffa169f597>] sctp_rcv+0x207/0xbb0 [sctp]
[22766.387161] [<ffffffff810d4da8>] ? trace_hardirqs_off_caller+0x28/0xd0
[22766.387163] [<ffffffff815827e3>] ? nf_hook_slow+0x133/0x210
[22766.387166] [<ffffffff815902fc>] ? ip_local_deliver_finish+0x4c/0x4c0
[22766.387168] [<ffffffff8159043d>] ip_local_deliver_finish+0x18d/0x4c0
[22766.387169] [<ffffffff815902fc>] ? ip_local_deliver_finish+0x4c/0x4c0
[22766.387171] [<ffffffff81590a07>] ip_local_deliver+0x47/0x80
[22766.387172] [<ffffffff8158fd80>] ip_rcv_finish+0x150/0x680
[22766.387174] [<ffffffff81590c54>] ip_rcv+0x214/0x320
[22766.387176] [<ffffffff81558c07>] __netif_receive_skb+0x7b7/0x910
[22766.387178] [<ffffffff8155856c>] ? __netif_receive_skb+0x11c/0x910
[22766.387180] [<ffffffff810d423e>] ? put_lock_stats.isra.25+0xe/0x40
[22766.387182] [<ffffffff81558f83>] netif_receive_skb+0x23/0x1f0
[22766.387183] [<ffffffff815596a9>] ? dev_gro_receive+0x139/0x440
[22766.387185] [<ffffffff81559280>] napi_skb_finish+0x70/0xa0
[22766.387187] [<ffffffff81559cb5>] napi_gro_receive+0xf5/0x130
[22766.387218] [<ffffffffa01c4679>] e1000_receive_skb+0x59/0x70 [e1000e]
[22766.387242] [<ffffffffa01c5aab>] e1000_clean_rx_irq+0x28b/0x460 [e1000e]
[22766.387266] [<ffffffffa01c9c18>] e1000e_poll+0x78/0x430 [e1000e]
[22766.387268] [<ffffffff81559fea>] net_rx_action+0x1aa/0x3d0
[22766.387270] [<ffffffff810a495f>] ? account_system_vtime+0x10f/0x130
[22766.387273] [<ffffffff810734d0>] __do_softirq+0xe0/0x420
[22766.387275] [<ffffffff8169826c>] call_softirq+0x1c/0x30
[22766.387278] [<ffffffff8101db15>] do_softirq+0xd5/0x110
[22766.387279] [<ffffffff81073bc5>] irq_exit+0xd5/0xe0
[22766.387281] [<ffffffff81698b03>] do_IRQ+0x63/0xd0
[22766.387283] [<ffffffff8168ee2f>] common_interrupt+0x6f/0x6f
[22766.387283] <EOI>
[22766.387284]
[22766.387285] [<ffffffff8168eed9>] ? retint_swapgs+0x13/0x1b
[22766.387285] Code: c0 90 5d c3 66 0f 1f 44 00 00 4c 89 c8 5d c3 0f 1f 00 55 48
89 e5 48 83
ec 20 48 89 5d e8 4c 89 65 f0 4c 89 6d f8 66 66 66 66 90 <0f> b7 87 98 00 00 00
48 89 fb
49 89 f5 66 c1 c0 08 66 39 46 02
[22766.387307]
[22766.387307] RIP
[22766.387311] [<ffffffffa168a2c9>] sctp_assoc_is_match+0x19/0x90 [sctp]
[22766.387311] RSP <ffff880147c039b0>
[22766.387142] ffffffffa16ab120
[22766.599537] ---[ end trace 3f6dae82e37b17f5 ]---
[22766.601221] Kernel panic - not syncing: Fatal exception in interrupt
It appears from his analysis and some staring at the code that this is likely
occuring because an association is getting freed while still on the
sctp_assoc_hashtable. As a result, we get a gpf when traversing the hashtable
while a freed node corrupts part of the list.
Nominally I would think that an mibalanced refcount was responsible for this,
but I can't seem to find any obvious imbalance. What I did note however was
that the two places where we create an association using
sctp_primitive_ASSOCIATE (__sctp_connect and sctp_sendmsg), have failure paths
which free a newly created association after calling sctp_primitive_ASSOCIATE.
sctp_primitive_ASSOCIATE brings us into the sctp_sf_do_prm_asoc path, which
issues a SCTP_CMD_NEW_ASOC side effect, which in turn adds a new association to
the aforementioned hash table. the sctp command interpreter that process side
effects has not way to unwind previously processed commands, so freeing the
association from the __sctp_connect or sctp_sendmsg error path would lead to a
freed association remaining on this hash table.
I've fixed this but modifying sctp_[un]hash_established to use hlist_del_init,
which allows us to proerly use hlist_unhashed to check if the node is on a
hashlist safely during a delete. That in turn alows us to safely call
sctp_unhash_established in the __sctp_connect and sctp_sendmsg error paths
before freeing them, regardles of what the associations state is on the hash
list.
I noted, while I was doing this, that the __sctp_unhash_endpoint was using
hlist_unhsashed in a simmilar fashion, but never nullified any removed nodes
pointers to make that function work properly, so I fixed that up in a simmilar
fashion.
I attempted to test this using a virtual guest running the SCTP_RR test from
netperf in a loop while running the trinity fuzzer, both in a loop. I wasn't
able to recreate the problem prior to this fix, nor was I able to trigger the
failure after (neither of which I suppose is suprising). Given the trace above
however, I think its likely that this is what we hit.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Reported-by: davej@redhat.com
CC: davej@redhat.com
CC: "David S. Miller" <davem@davemloft.net>
CC: Vlad Yasevich <vyasevich@gmail.com>
CC: Sridhar Samudrala <sri@us.ibm.com>
CC: linux-sctp@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
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Few drivers use GFP_DMA allocations, and netdev_alloc_frag()
doesn't allocate pages in DMA zone.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=44461
Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In rare cases, bnx2x_free_tx_skbs() can unmap the wrong DMA address
when it gets to the last entry of the tx ring. We were not using
the proper macro to skip the last entry when advancing the tx index.
Reported-by: Zongyun Lai <zlai@vmware.com>
Reviewed-by: Jeffrey Huang <huangjw@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Or Gerlitz reported triggering of WARN_ON_ONCE(delta < len); in
skb_try_coalesce()
This warning tracks drivers that incorrectly set skb->truesize
IPoIB indeed allocates a full page to store a fragment, but only
accounts in skb->truesize the used part of the page (frame length)
This patch fixes skb truesize underestimation, and
also fixes a performance issue, because RX skbs have not enough tailroom
to allow IP and TCP stacks to pull their header in skb linear part
without an expensive call to pskb_expand_head()
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Erez Shitrit <erezsh@mellanox.com>
Cc: Shlomo Pongartz <shlomop@mellanox.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In driver reload test there is a memory leak.
The structure vlan_info was not freed when the driver was removed.
It was not released since the nr_vids var is one after last vlan was removed.
The nr_vids is one, since vlan zero is added to the interface when the interface
is being set, but the vlan zero is not deleted at unregister.
Fix - delete vlan zero when we unregister the device.
Signed-off-by: Amir Hanania <amir.hanania@intel.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Included changes:
- fix a bug generated by the wrong interaction between the GW feature and the
Bridge Loop Avoidance
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If the gateway functionality is used, some broadcast packets (DHCP
requests) may be transmitted as unicast packets. As the bridge loop
avoidance code now only considers the payload Ethernet destination,
it may drop the DHCP request for clients which are claimed by other
backbone gateways, because it falsely infers from the broadcast address
that the right backbone gateway should havehandled the broadcast.
Fix this by checking and delegating the batman-adv packet type used
for transmission.
Reported-by: Guido Iribarren <guidoiribarren@buenosaireslibre.org>
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
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commit db83d136d7f753 (gianfar: Fix missing sock reference when
processing TX time stamps) added a potential sk_wmem_alloc imbalance
If the new skb has a different truesize than old one, we can get a
negative sk_wmem_alloc once new skb is orphaned at TX completion.
Now we no longer early orphan skbs in dev_hard_start_xmit(), this
probably can lead to fatal bugs.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Tested-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Manfred Rudigier <manfred.rudigier@omicron.at>
Cc: Claudiu Manoil <claudiu.manoil@freescale.com>
Cc: Jiajun Wu <b06378@freescale.com>
Cc: Andy Fleming <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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iterator variable
If list_for_each_entry, etc complete a traversal of the list, the iterator
variable ends up pointing to an address at an offset from the list head,
and not a meaningful structure. Thus this value should not be used after
the end of the iterator. There does not seem to be a meaningful value to
provide to netdev_warn. Replace with pr_warn, since pr_err is used
elsewhere.
This problem was found using Coccinelle (http://coccinelle.lip6.fr/).
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If list_for_each_entry, etc complete a traversal of the list, the iterator
variable ends up pointing to an address at an offset from the list head,
and not a meaningful structure. Thus this value should not be used after
the end of the iterator. This seems to be a copy-paste bug from a previous
debugging message, and so the meaningless value is just deleted.
This problem was found using Coccinelle (http://coccinelle.lip6.fr/).
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If list_for_each_entry, etc complete a traversal of the list, the iterator
variable ends up pointing to an address at an offset from the list head,
and not a meaningful structure. Thus this value should not be used after
the end of the iterator. The dereferences are just deleted from the
debugging statement.
This problem was found using Coccinelle (http://coccinelle.lip6.fr/).
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
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dev->priomap is allocated by extend_netdev_table() called from
update_netdev_tables().
And this is only called if write_priomap() is called.
But if write_priomap() is not called, it seems we can have out of bounds
accesses in cgrp_destroy(), read_priomap() & skb_update_prio()
With help from Gao Feng
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Gao feng <gaofeng@cn.fujitsu.com>
Acked-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The bonding debugfs support has been broken in the presence of network
namespaces since it has been added. The debugfs support does not handle
multiple bonding devices with the same name in different network
namespaces.
I haven't had any bug reports, and I'm not interested in getting any.
Disable the debugfs support when network namespaces are enabled.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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It was recently reported that moving a bonding device between network
namespaces causes warnings from /proc. It turns out after the move we
were trying to add and to remove the /proc/net/bonding entries from the
wrong network namespace.
Move the bonding /proc registration code into the NETDEV_REGISTER and
NETDEV_UNREGISTER events where the proc registration and unregistration
will always happen at the right time.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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For the higher mtu sizes requiring the buffer size greater than 8192,
the buffers are sent or received using multiple dma descriptors/ same
descriptor with option of multi buffer handling.
It was observed during tests that the driver was missing on data
packets during the normal ping operations if the data buffers being used
catered to jumbo frame handling.
The memory barrriers are added in between preparation of dma descriptors
in the jumbo frame handling path to ensure all instructions before
enabling the dma are complete.
Signed-off-by: Deepak Sikri <deepak.sikri@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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It was observed that during multiple reboots nfs hangs. The status of
receive descriptors shows that all the descriptors were in control of
CPU, and none were assigned to DMA.
Also the DMA status register confirmed that the Rx buffer is
unavailable.
This patch adds the fix for the same by adding the memory barriers to
ascertain that the all instructions before enabling the Rx or Tx DMA are
completed which involves the proper setting of the ownership bit in DMA
descriptors.
Signed-off-by: Deepak Sikri <deepak.sikri@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem
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When we remove a key, we put a key index which was supposed
to tell the fw that we are actually removing the key. But
instead the fw took that index as a valid index and messed
up the SRAM of the device.
This memory corruption on the device mangled the data of
the SCD. The impact on the user is that SCD queue 2 got
stuck after having removed keys.
Reported-by: Paul Bolle <pebolle@tiscali.nl>
Cc: stable@vger.kernel.org
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This is iwlegacy version of:
commit 342bbf3fee2fa9a18147e74b2e3c4229a4564912
Author: Johannes Berg <johannes.berg@intel.com>
Date: Sun Mar 4 08:50:46 2012 -0800
iwlwifi: always monitor for stuck queues
If we only monitor while associated, the following
can happen:
- we're associated, and the queue stuck check
runs, setting the queue "touch" time to X
- we disassociate, stopping the monitoring,
which leaves the time set to X
- almost 2s later, we associate, and enqueue
a frame
- before the frame is transmitted, we monitor
for stuck queues, and find the time set to
X, although it is now later than X + 2000ms,
so we decide that the queue is stuck and
erroneously restart the device
Cc: stable@vger.kernel.org
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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On rt2x00_dmastart() we increase index specified by Q_INDEX and on
rt2x00_dmadone() we increase index specified by Q_INDEX_DONE. So entries
between Q_INDEX_DONE and Q_INDEX are those we currently process in the
hardware. Entries between Q_INDEX and Q_INDEX_DONE are those we can
submit to the hardware.
According to that fix rt2x00usb_kick_queue(), as we need to submit RX
entries that are not processed by the hardware. It worked before only
for empty queue, otherwise was broken.
Note that for TX queues indexes ordering are ok. We need to kick entries
that have filled skb, but was not submitted to the hardware, i.e.
started from Q_INDEX_DONE and have ENTRY_DATA_PENDING bit set.
From practical standpoint this fixes RX queue stall, usually reproducible
in AP mode, like for example reported here:
https://bugzilla.redhat.com/show_bug.cgi?id=828824
Reported-and-tested-by: Franco Miceli <fmiceli@plan.ceibal.edu.uy>
Reported-and-tested-by: Tom Horsley <horsley1953@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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> *. CID 709078: Resource leak (RESOURCE_LEAK)
> - drivers/net/wireless/mwifiex/cfg80211.c, line: 935
> Assigning: "bss_cfg" = storage returned from "kzalloc(132UL, 208U)"
> - but was not free
> drivers/net/wireless/mwifiex/cfg80211.c:935
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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