Re: BUG: unable to handle kernel NULL pointer dereference in generic_perform_write (2)

From: syzbot
Date: Wed Apr 15 2020 - 00:55:22 EST


Hello,

syzbot has tested the proposed patch and the reproducer did not trigger crash:

Reported-and-tested-by: syzbot+bca9799bf129256190da@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit: 5b8b9d0c Merge branch 'akpm' (patches from Andrew)
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel config: https://syzkaller.appspot.com/x/.config?x=23c5a352e32a1944
dashboard link: https://syzkaller.appspot.com/bug?extid=bca9799bf129256190da
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
patch: https://syzkaller.appspot.com/x/patch.diff?x=15524a00100000

Note: testing is done by a robot and is best-effort only.