On Tue, Mar 10, 2020 at 08:55:14AM -0700, syzbot wrote:

Hello,

syzbot found the following crash on:

HEAD commit:    c99b17ac Add linux-next specific files for 20200225
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1610d70de00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6b7ebe4bd0931c45
dashboard link: https://syzkaller.appspot.com/bug?extid=cac0c4e204952cf449b1
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1242e1fde00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1110d70de00000

The bug was bisected to:

commit 6863de00e5400b534cd4e3869ffbc8f94da41dfc
Author: Mina Almasry [off-list ref]
Date:   Thu Feb 20 03:55:30 2020 +0000

    hugetlb_cgroup: add accounting for shared mappings

Mina, can you please take a look at this?

Thanks.

-- 
tejun