diff options
| author | Eric Biggers <ebiggers@google.com> | 2018-07-13 16:59:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-07-14 11:11:10 -0700 |
| commit | fe10e398e860955bac4d28ec031b701d358465e4 (patch) | |
| tree | 5f5e31e058796ca818dae8f4bef23afd5aaec062 /mm | |
| parent | ffe075132af8b7967089c361e506d4fa747efd14 (diff) | |
reiserfs: fix buffer overflow with long warning messages
ReiserFS prepares log messages into a 1024-byte buffer with no bounds
checks. Long messages, such as the "unknown mount option" warning when
userspace passes a crafted mount options string, overflow this buffer.
This causes KASAN to report a global-out-of-bounds write.
Fix it by truncating messages to the buffer size.
Link: http://lkml.kernel.org/r/20180707203621.30922-1-ebiggers3@gmail.com
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: syzbot+b890b3335a4d8c608963@syzkaller.appspotmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions