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| author |   Amir Goldstein <amir73il@gmail.com> | 2018-09-28 21:00:48 +0300 |
|---|---|---|
| committer |   Miklos Szeredi <mszeredi@redhat.com> | 2018-10-04 14:49:10 +0200 |
| commit | 601350ff58d5415a001769532f6b8333820e5786 (patch) | |
| tree | 56ac78548e6345a2f5c3a6d96dd5d9fe304d69ed /fs/overlayfs/file.c | |
| parent | ovl: make symbol 'ovl_aops' static (diff) | |
| download | linux-dev-601350ff58d5415a001769532f6b8333820e5786.tar.xz linux-dev-601350ff58d5415a001769532f6b8333820e5786.zip | |
ovl: fix access beyond unterminated strings
KASAN detected slab-out-of-bounds access in printk from overlayfs,
because string format used %*s instead of %.*s.
> BUG: KASAN: slab-out-of-bounds in string+0x298/0x2d0 lib/vsprintf.c:604
> Read of size 1 at addr ffff8801c36c66ba by task syz-executor2/27811
>
> CPU: 0 PID: 27811 Comm: syz-executor2 Not tainted 4.19.0-rc5+ #36
...
> printk+0xa7/0xcf kernel/printk/printk.c:1996
> ovl_lookup_index.cold.15+0xe8/0x1f8 fs/overlayfs/namei.c:689
Reported-by: syzbot+376cea2b0ef340db3dd4@syzkaller.appspotmail.com
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 359f392ca53e ("ovl: lookup index entry for copy up origin")
Cc: <stable@vger.kernel.org> # v4.13
Diffstat (limited to 'fs/overlayfs/file.c')
0 files changed, 0 insertions, 0 deletions