Re: [syzbot] BUG: sleeping function called from invalid context in corrupted (2)

[Daniel Borkmann <daniel@iogearbox.net>]

On 6/9/22 6:01 AM, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    03c312cc5f47 Add linux-next specific files for 20220608
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=155a4b73f00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=a0a0f5184fb46b
> dashboard link: https://syzkaller.appspot.com/bug?extid=efe1afd49d981d281ae4
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=168d9ebff00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=125c6e5ff00000
> 
> The issue was bisected to:
> 
> commit d8616ee2affcff37c5d315310da557a694a3303d
> Author: Wang Yufen <wangyufen@huawei.com>
> Date:   Tue May 24 07:53:11 2022 +0000
> 
>      bpf, sockmap: Fix sk->sk_forward_alloc warn_on in sk_stream_kill_queues

Wang, please take a look and fix. Thanks!

> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=138a4b57f00000
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=104a4b57f00000
> console output: https://syzkaller.appspot.com/x/log.txt?x=178a4b57f00000
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+efe1afd49d981d281ae4@syzkaller.appspotmail.com
> Fixes: d8616ee2affc ("bpf, sockmap: Fix sk->sk_forward_alloc warn_on in sk_stream_kill_queues")
> 
> BUG: sleeping function called from invalid context at kernel/workqueue.c:3010
> in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 3611, name: syz-executor124
> preempt_count: 201, expected: 0
> RCU nest depth: 0, expected: 0
> 3 locks held by syz-executor124/3611:
>   #0: ffff888073295c10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:742 [inline]
>   #0: ffff888073295c10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:649
>   #1: ffff888073ff1ab0 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline]
>   #1: ffff888073ff1ab0 (sk_lock-AF_INET6){+.+.}-{0:0}, at: tcp_close+0x1e/0xc0 net/ipv4/tcp.c:2908
> 
> 
> ---
> This report is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@googlegroups.com.
> 
> syzbot will keep track of this issue. See:
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> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
> syzbot can test patches for this issue, for details see:
> https://goo.gl/tpsmEJ#testing-patches
>