]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
fs/minix: don't allow getting deleted inodes
authorEric Biggers <ebiggers@google.com>
Wed, 12 Aug 2020 01:35:27 +0000 (18:35 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 12 Aug 2020 17:58:00 +0000 (10:58 -0700)
commitfacb03dddec04e4aac1bb2139accdceb04deb1f3
tree2b8482e9212faa51e9792379588c0ac7be949c1d
parentda27e0a0e5f655f0d58d4e153c3182bb2b290f64
fs/minix: don't allow getting deleted inodes

If an inode has no links, we need to mark it bad rather than allowing it
to be accessed.  This avoids WARNINGs in inc_nlink() and drop_nlink() when
doing directory operations on a fuzzed filesystem.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: syzbot+a9ac3de1b5de5fb10efc@syzkaller.appspotmail.com
Reported-by: syzbot+df958cf5688a96ad3287@syzkaller.appspotmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Qiujun Huang <anenbupt@gmail.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200628060846.682158-3-ebiggers@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/minix/inode.c