Re: [syzbot] WARNING in nci_send_cmd

[Lin Ma]

> -----Original Messages-----
> From: syzbot <syzbot+43475bf3cfbd6e41f5b7@xxxxxxxxxxxxxxxxxxxxxxxxx>
> Sent Time: 2022-11-16 18:52:38 (Wednesday)
> To: davem@xxxxxxxxxxxxx, edumazet@xxxxxxxxxx, krzysztof.kozlowski@xxxxxxxxxx, kuba@xxxxxxxxxx, linma@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, pabeni@xxxxxxxxxx, syzkaller-bugs@xxxxxxxxxxxxxxxx
> Cc: 
> Subject: [syzbot] WARNING in nci_send_cmd
> 
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    9500fc6e9e60 Merge branch 'for-next/core' into for-kernelci
> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
> console output: https://syzkaller.appspot.com/x/log.txt?x=16ebd49e880000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=b25c9f218686dd5e
> dashboard link: https://syzkaller.appspot.com/bug?extid=43475bf3cfbd6e41f5b7
> compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
> userspace arch: arm64
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=150027ae880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=141717ae880000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/1363e60652f7/disk-9500fc6e.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/fcc4da811bb6/vmlinux-9500fc6e.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/0b554298f1fa/Image-9500fc6e.gz.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+43475bf3cfbd6e41f5b7@xxxxxxxxxxxxxxxxxxxxxxxxx
> 
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 3079 at kernel/workqueue.c:1438 is_chained_work kernel/workqueue.c:1382 [inline]
> WARNING: CPU: 1 PID: 3079 at kernel/workqueue.c:1438 __queue_work+0x878/0x8b4 kernel/workqueue.c:1438
> Modules linked in:
> CPU: 1 PID: 3079 Comm: syz-executor103 Not tainted 6.1.0-rc5-syzkaller-32269-g9500fc6e9e60 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
> pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> pc : __queue_work+0x878/0x8b4 kernel/workqueue.c:1382
> lr : is_chained_work kernel/workqueue.c:1382 [inline]
> lr : __queue_work+0x878/0x8b4 kernel/workqueue.c:1438
> sp : ffff80000ffcb710
> x29: ffff80000ffcb710 x28: ffff0000c22b8000 x27: 0000000000000000
> x26: ffff0000ca031a10 x25: ffff0000c22b8000 x24: 0000000000000100
> x23: 0000000100000000 x22: 00000000000f000a x21: ffff0000ca152400
> x20: 0000000000000008 x19: ffff0000cb1e20f8 x18: 00000000000001ac
> x17: 0000000000000000 x16: ffff80000dc18158 x15: ffff0000c22b8000
> x14: 00000000000000c0 x13: 00000000ffffffff x12: ffff0000c22b8000
> x11: ff808000081306bc x10: 0000000000000000 x9 : ffff8000081306bc
> x8 : ffff0000c22b8000 x7 : ffff80000b25d5e8 x6 : 0000000000000000
> x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
> x2 : ffff0000cb1e20f8 x1 : 0000000000000000 x0 : 0000000000000000
> Call trace:
>  is_chained_work kernel/workqueue.c:1382 [inline]
>  __queue_work+0x878/0x8b4 kernel/workqueue.c:1438
>  queue_work_on+0xb0/0x15c kernel/workqueue.c:1545
>  queue_work include/linux/workqueue.h:503 [inline]
>  nci_send_cmd+0xe8/0x154 net/nfc/nci/core.c:1376
>  nci_reset_req net/nfc/nci/core.c:166 [inline]
>  __nci_request net/nfc/nci/core.c:107 [inline]
>  nci_open_device+0x168/0x518 net/nfc/nci/core.c:502
>  nci_dev_up+0x20/0x30 net/nfc/nci/core.c:631
>  nfc_dev_up+0xcc/0x1b0 net/nfc/core.c:118
>  nfc_genl_dev_up+0x40/0x78 net/nfc/netlink.c:770
>  genl_family_rcv_msg_doit net/netlink/genetlink.c:756 [inline]
>  genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]
>  genl_rcv_msg+0x458/0x4f4 net/netlink/genetlink.c:850
>  netlink_rcv_skb+0xe8/0x1d4 net/netlink/af_netlink.c:2540
>  genl_rcv+0x38/0x50 net/netlink/genetlink.c:861
>  netlink_unicast_kernel+0xfc/0x1dc net/netlink/af_netlink.c:1319
>  netlink_unicast+0x164/0x248 net/netlink/af_netlink.c:1345
>  netlink_sendmsg+0x484/0x584 net/netlink/af_netlink.c:1921
>  sock_sendmsg_nosec net/socket.c:714 [inline]
>  sock_sendmsg net/socket.c:734 [inline]
>  ____sys_sendmsg+0x2f8/0x440 net/socket.c:2482
>  ___sys_sendmsg net/socket.c:2536 [inline]
>  __sys_sendmsg+0x1ac/0x228 net/socket.c:2565
>  __do_sys_sendmsg net/socket.c:2574 [inline]
>  __se_sys_sendmsg net/socket.c:2572 [inline]
>  __arm64_sys_sendmsg+0x2c/0x3c net/socket.c:2572
>  __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
>  invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
>  el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
>  do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206
>  el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637
>  el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
>  el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
> irq event stamp: 42
> hardirqs last  enabled at (41): [<ffff80000c0b7c04>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
> hardirqs last  enabled at (41): [<ffff80000c0b7c04>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194
> hardirqs last disabled at (42): [<ffff80000812fd60>] queue_work_on+0x78/0x15c kernel/workqueue.c:1542
> softirqs last  enabled at (8): [<ffff80000801c38c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
> softirqs last disabled at (6): [<ffff80000801c358>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
> ---[ end trace 0000000000000000 ]---
> nci: __nci_request: wait_for_completion_interruptible_timeout failed 0
> 
> 
> ---
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> 
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> syzbot can test patches for this issue, for details see:
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#syz test: https://github.com/f0rm2l1n/linux-fix.git master