On Wed, Oct 16, 2019 at 06:47:55PM -0700, Eric Biggers wrote: > On Wed, Oct 16, 2019 at 06:42:11PM -0700, syzbot wrote: > > ================================================================== > > BUG: KASAN: use-after-free in mnt_warn_timestamp_expiry+0x4a/0x250 > > fs/namespace.c:2471 > > Read of size 8 at addr ffff888099937328 by task syz-executor.1/18510 > > > > Looks like a duplicate of this: > > #syz dup: KASAN: use-after-free Read in do_mount > > See the existing thread and proposed fix here: > https://lkml.kernel.org/linux-fsdevel/000000000000805e5505945a234b@xxxxxxxxxx/T/#u FWIW, I'd go with your "move mnt_warn_timestamp_expiry() up". However, I'd probably turn the message into something like foofs filesystem getting mounted at /mnt/barf supports... And s/mounted/reconfigured/ if mnt_has_parent(mnt) is already true. Objections? Al, currently experiencing the joy of being ears-deep in 5 different shitpiles simultaneously...
