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authorTero Roponen <tero.roponen@gmail.com>2010-12-01 20:04:20 +0200
committerPekka Enberg <penberg@kernel.org>2010-12-04 09:40:16 +0200
commit8165984acf825917437debae519209073c32a5a7 (patch)
treeb4322432ad62529a7eee6b9621473a9e1b58be3c /mm/slub.c
parent85beb5869a4f6abb52a7cf8e01de6fa57e9ee47d (diff)
downloadop-kernel-dev-8165984acf825917437debae519209073c32a5a7.zip
op-kernel-dev-8165984acf825917437debae519209073c32a5a7.tar.gz
slub: Fix a crash during slabinfo -v
Commit f7cb1933621bce66a77f690776a16fe3ebbc4d58 ("SLUB: Pass active and inactive redzone flags instead of boolean to debug functions") missed two instances of check_object(). This caused a lot of warnings during 'slabinfo -v' finally leading to a crash: BUG ext4_xattr: Freepointer corrupt ... BUG buffer_head: Freepointer corrupt ... BUG ext4_alloc_context: Freepointer corrupt ... ... BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 IP: [<ffffffff810a291f>] file_sb_list_del+0x1c/0x35 PGD 79d78067 PUD 79e67067 PMD 0 Oops: 0002 [#1] SMP last sysfs file: /sys/kernel/slab/:t-0000192/validate This patch fixes the problem by converting the two missed instances. Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Tero Roponen <tero.roponen@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm/slub.c')
-rw-r--r--mm/slub.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 7796a04..48d82a5 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3417,13 +3417,13 @@ static int validate_slab(struct kmem_cache *s, struct page *page,
for_each_free_object(p, s, page->freelist) {
set_bit(slab_index(p, s, addr), map);
- if (!check_object(s, page, p, 0))
+ if (!check_object(s, page, p, SLUB_RED_INACTIVE))
return 0;
}
for_each_object(p, s, addr, page->objects)
if (!test_bit(slab_index(p, s, addr), map))
- if (!check_object(s, page, p, 1))
+ if (!check_object(s, page, p, SLUB_RED_ACTIVE))
return 0;
return 1;
}
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