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| author | Don Mullis <don.mullis@gmail.com> | 2010-10-01 00:15:32 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-01 19:50:58 +0200 |
| commit | f015ac3edd84ad72f88e08a4d83c56c360aae404 (patch) | |
| tree | 87f88c4e502d69752776dd36451d0ece5416f9f1 /fs | |
| parent | sys_semctl: fix kernel stack leakage (diff) | |
| download | linux-f015ac3edd84ad72f88e08a4d83c56c360aae404.tar.xz linux-f015ac3edd84ad72f88e08a4d83c56c360aae404.zip | |
lib/list_sort: do not pass bad pointers to cmp callback
If the original list is a POT in length, the first callback from line 73
will pass a==b both pointing to the original list_head. This is dangerous
because the 'list_sort()' user can use 'container_of()' and accesses the
"containing" object, which does not necessary exist for the list head. So
the user can access RAM which does not belong to him. If this is a write
access, we can end up with memory corruption.
Signed-off-by: Don Mullis <don.mullis@gmail.com>
Tested-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions