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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2007-10-07 23:44:17 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2007-10-07 23:44:17 -0700 |
| commit | 891e6a931255238dddd08a7b306871240961a27f (patch) | |
| tree | 70cd2faf43bd7f306f3b7a758388e6b272ff1730 /net/rose/rose_loopback.c | |
| parent | 48611c47d09023d9356e78550d1cadb8d61da9c8 (diff) | |
| download | op-kernel-dev-891e6a931255238dddd08a7b306871240961a27f.zip op-kernel-dev-891e6a931255238dddd08a7b306871240961a27f.tar.gz | |
[ROSE]: Fix rose.ko oops on unload
Commit a3d384029aa304f8f3f5355d35f0ae274454f7cd aka
"[AX.25]: Fix unchecked rose_add_loopback_neigh uses"
transformed rose_loopback_neigh var into statically allocated one.
However, on unload it will be kfree's which can't work.
Steps to reproduce:
modprobe rose
rmmod rose
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000008
printing eip:
c014c664
*pde = 00000000
Oops: 0000 [#1]
PREEMPT DEBUG_PAGEALLOC
Modules linked in: rose ax25 fan ufs loop usbhid rtc snd_intel8x0 snd_ac97_codec ehci_hcd ac97_bus uhci_hcd thermal usbcore button processor evdev sr_mod cdrom
CPU: 0
EIP: 0060:[<c014c664>] Not tainted VLI
EFLAGS: 00210086 (2.6.23-rc9 #3)
EIP is at kfree+0x48/0xa1
eax: 00000556 ebx: c1734aa0 ecx: f6a5e000 edx: f7082000
esi: 00000000 edi: f9a55d20 ebp: 00200287 esp: f6a5ef28
ds: 007b es: 007b fs: 0000 gs: 0033 ss: 0068
Process rmmod (pid: 1823, ti=f6a5e000 task=f7082000 task.ti=f6a5e000)
Stack: f9a55d20 f9a5200c 00000000 00000000 00000000 f6a5e000 f9a5200c f9a55a00
00000000 bf818cf0 f9a51f3f f9a55a00 00000000 c0132c60 65736f72 00000000
f69f9630 f69f9528 c014244a f6a4e900 00200246 f7082000 c01025e6 00000000
Call Trace:
[<f9a5200c>] rose_rt_free+0x1d/0x49 [rose]
[<f9a5200c>] rose_rt_free+0x1d/0x49 [rose]
[<f9a51f3f>] rose_exit+0x4c/0xd5 [rose]
[<c0132c60>] sys_delete_module+0x15e/0x186
[<c014244a>] remove_vma+0x40/0x45
[<c01025e6>] sysenter_past_esp+0x8f/0x99
[<c012bacf>] trace_hardirqs_on+0x118/0x13b
[<c01025b6>] sysenter_past_esp+0x5f/0x99
=======================
Code: 05 03 1d 80 db 5b c0 8b 03 25 00 40 02 00 3d 00 40 02 00 75 03 8b 5b 0c 8b 73 10 8b 44 24 18 89 44 24 04 9c 5d fa e8 77 df fd ff <8b> 56 08 89 f8 e8 84 f4 fd ff e8 bd 32 06 00 3b 5c 86 60 75 0f
EIP: [<c014c664>] kfree+0x48/0xa1 SS:ESP 0068:f6a5ef28
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rose/rose_loopback.c')
| -rw-r--r-- | net/rose/rose_loopback.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/rose/rose_loopback.c b/net/rose/rose_loopback.c index cd01642..114df6e 100644 --- a/net/rose/rose_loopback.c +++ b/net/rose/rose_loopback.c @@ -79,7 +79,7 @@ static void rose_loopback_timer(unsigned long param) skb_reset_transport_header(skb); - sk = rose_find_socket(lci_o, &rose_loopback_neigh); + sk = rose_find_socket(lci_o, rose_loopback_neigh); if (sk) { if (rose_process_rx_frame(sk, skb) == 0) kfree_skb(skb); @@ -88,7 +88,7 @@ static void rose_loopback_timer(unsigned long param) if (frametype == ROSE_CALL_REQUEST) { if ((dev = rose_dev_get(dest)) != NULL) { - if (rose_rx_call_request(skb, dev, &rose_loopback_neigh, lci_o) == 0) + if (rose_rx_call_request(skb, dev, rose_loopback_neigh, lci_o) == 0) kfree_skb(skb); } else { kfree_skb(skb); |
