diff options
| author | Eric Biggers <ebiggers@google.com> | 2018-07-13 16:59:27 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-22 14:27:39 +0200 |
| commit | ec5e52a881fe7df745a45262e486f73fc6bd6b88 (patch) | |
| tree | 7d02710ba281556777209ea0194c06c83b57fe72 /net/dns_resolver | |
| parent | 064d9e9744728d0c10ef5e22e955e8886f3dfcca (diff) | |
reiserfs: fix buffer overflow with long warning messages
commit fe10e398e860955bac4d28ec031b701d358465e4 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/dns_resolver')
0 files changed, 0 insertions, 0 deletions