device team0 entered promiscuous mode
device team_slave_0 entered promiscuous mode
======================================================
WARNING: possible circular locking dependency detected
4.14.292-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.3/10498 is trying to acquire lock:
 ((&strp->work)){+.+.}, at: [<ffffffff81367998>] flush_work+0x88/0x770 kernel/workqueue.c:2887

but task is already holding lock:
 (sk_lock-AF_INET){+.+.}, at: [<ffffffff86819888>] lock_sock include/net/sock.h:1473 [inline]
 (sk_lock-AF_INET){+.+.}, at: [<ffffffff86819888>] kcm_attach net/kcm/kcmsock.c:1390 [inline]
 (sk_lock-AF_INET){+.+.}, at: [<ffffffff86819888>] kcm_attach_ioctl net/kcm/kcmsock.c:1490 [inline]
 (sk_lock-AF_INET){+.+.}, at: [<ffffffff86819888>] kcm_ioctl+0x328/0xfb0 net/kcm/kcmsock.c:1701

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (sk_lock-AF_INET){+.+.}:
       lock_sock_nested+0xb7/0x100 net/core/sock.c:2813
       do_strp_work net/strparser/strparser.c:415 [inline]
       strp_work+0x3e/0x100 net/strparser/strparser.c:434
       process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
       worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
       kthread+0x30d/0x420 kernel/kthread.c:232
       ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404

-> #0 ((&strp->work)){+.+.}:
       lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
       flush_work+0xad/0x770 kernel/workqueue.c:2890
       __cancel_work_timer+0x321/0x460 kernel/workqueue.c:2965
       strp_done+0x53/0xd0 net/strparser/strparser.c:519
       kcm_attach net/kcm/kcmsock.c:1429 [inline]
       kcm_attach_ioctl net/kcm/kcmsock.c:1490 [inline]
       kcm_ioctl+0x828/0xfb0 net/kcm/kcmsock.c:1701
       sock_do_ioctl net/socket.c:974 [inline]
       sock_ioctl+0x2cc/0x4c0 net/socket.c:1071
       vfs_ioctl fs/ioctl.c:46 [inline]
       file_ioctl fs/ioctl.c:500 [inline]
       do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
       SYSC_ioctl fs/ioctl.c:701 [inline]
       SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x46/0xbb

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(sk_lock-AF_INET);
                               lock((&strp->work));
                               lock(sk_lock-AF_INET);
  lock((&strp->work));

 *** DEADLOCK ***

1 lock held by syz-executor.3/10498:
 #0:  (sk_lock-AF_INET){+.+.}, at: [<ffffffff86819888>] lock_sock include/net/sock.h:1473 [inline]
 #0:  (sk_lock-AF_INET){+.+.}, at: [<ffffffff86819888>] kcm_attach net/kcm/kcmsock.c:1390 [inline]
 #0:  (sk_lock-AF_INET){+.+.}, at: [<ffffffff86819888>] kcm_attach_ioctl net/kcm/kcmsock.c:1490 [inline]
 #0:  (sk_lock-AF_INET){+.+.}, at: [<ffffffff86819888>] kcm_ioctl+0x328/0xfb0 net/kcm/kcmsock.c:1701

stack backtrace:
CPU: 1 PID: 10498 Comm: syz-executor.3 Not tainted 4.14.292-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258
 check_prev_add kernel/locking/lockdep.c:1905 [inline]
 check_prevs_add kernel/locking/lockdep.c:2022 [inline]
 validate_chain kernel/locking/lockdep.c:2464 [inline]
 __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 flush_work+0xad/0x770 kernel/workqueue.c:2890
 __cancel_work_timer+0x321/0x460 kernel/workqueue.c:2965
 strp_done+0x53/0xd0 net/strparser/strparser.c:519
 kcm_attach net/kcm/kcmsock.c:1429 [inline]
 kcm_attach_ioctl net/kcm/kcmsock.c:1490 [inline]
 kcm_ioctl+0x828/0xfb0 net/kcm/kcmsock.c:1701
 sock_do_ioctl net/socket.c:974 [inline]
 sock_ioctl+0x2cc/0x4c0 net/socket.c:1071
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f3847db1279
RSP: 002b:00007f38466c3168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3847ec41f0 RCX: 00007f3847db1279
RDX: 0000000020000180 RSI: 00000000000089e0 RDI: 0000000000000005
RBP: 00007f3847e0b2e9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe7908a1af R14: 00007f38466c3300 R15: 0000000000022000
device team_slave_1 entered promiscuous mode
8021q: adding VLAN 0 to HW filter on device team0
bond0: Enslaving team0 as an active interface with an up link
overlayfs: unrecognized mount option "�]
$Ёowerdi=.:
�ls0" or missing value
overlayfs: unrecognized mount option "lower�r=./file0" or missing value
9pnet: Could not find request transport: xen
ieee80211 : Selected rate control algorithm 'minstrel_ht'
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
overlayfs: unrecognized mount option "�]
$Ёowerdi=.:
�ls0" or missing value
ieee80211 : hwaddr 02:00:00:00:02:00 registered
vxfs: WRONG superblock magic 00000000 at 1
vxfs: unable to read disk superblock at 8
vxfs: can't find superblock.
overlayfs: unrecognized mount option "�]
$Ёowerdi=.:
�ls0" or missing value
overlayfs: unrecognized mount option "lower�r=./file0" or missing value
9pnet: Could not find request transport: xen
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
ieee80211 phy3: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy3: hwaddr 02:00:00:00:03:00 registered
vxfs: WRONG superblock magic 00000000 at 1
vxfs: unable to read disk superblock at 8
ieee80211 phy4: Selected rate control algorithm 'minstrel_ht'
sctp: [Deprecated]: syz-executor.4 (pid 10744) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
vxfs: can't find superblock.
ieee80211 phy4: hwaddr 02:00:00:00:04:00 registered
ieee80211 phy5: Selected rate control algorithm 'minstrel_ht'
vxfs: WRONG superblock magic 00000000 at 1
vxfs: unable to read disk superblock at 8
ieee80211 phy5: hwaddr 02:00:00:00:05:00 registered
vxfs: can't find superblock.
ieee80211 phy6: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy6: hwaddr 02:00:00:00:06:00 registered
ieee80211 phy7: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy7: hwaddr 02:00:00:00:07:00 registered
ieee80211 phy8: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy8: hwaddr 02:00:00:00:08:00 registered
ieee80211 phy9: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy9: hwaddr 02:00:00:00:09:00 registered
ieee80211 phy10: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy10: hwaddr 02:00:00:00:0a:00 registered
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
ieee80211 phy11: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy11: hwaddr 02:00:00:00:0b:00 registered
audit: type=1326 audit(1662716848.332:2): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=10924 comm="syz-executor.5" exe="/root/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f44749d6279 code=0x0
audit: type=1326 audit(1662716848.462:3): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=10941 comm="syz-executor.5" exe="/root/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f44749d6279 code=0x0
audit: type=1326 audit(1662716848.542:4): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=10959 comm="syz-executor.5" exe="/root/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f44749d6279 code=0x0
audit: type=1326 audit(1662716849.182:5): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=10973 comm="syz-executor.5" exe="/root/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f44749d6279 code=0x0
audit: type=1804 audit(1662716854.152:6): pid=11709 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir472952025/syzkaller.L17j0Q/86/bus" dev="sda1" ino=14127 res=1