On 10/28/19 8:36 AM, Marcelo Ricardo Leitner wrote:

On Mon, Oct 28, 2019 at 08:32:08AM -0700, syzbot wrote:

quoted

Hello,

syzbot found the following crash on:

HEAD commit:    d6d5df1d Linux 5.4-rc5
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17ef5a70e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2bcb64e504d04eff
dashboard link: https://syzkaller.appspot.com/bug?extid=e5b57b8780297657b25b
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
userspace arch: i386
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16cd8800e00000

The bug was bisected to:

commit 61086f391044fd587af9d70a9b8f6f800dd474ba
Author: Vlad Buslov [off-list ref]
Date:   Fri Aug 2 19:21:56 2019 +0000

    net/mlx5e: Protect encap hash table with mutex

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=135960af600000

This is weird. This mlx5e commit has nothing to do with SCTP diag
dump.

syzbot bisections results might be wrong, it happens quite often.

But the SCTP bug is probably real.