syzbot


possible deadlock in dev_uc_sync_multiple (3)

Status: upstream: reported on 2023/02/17 11:15
Reported-by: syzbot+8adf0767bf666e3b3b11@syzkaller.appspotmail.com
First crash: 458d, last: 458d
Similar bugs (8)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream possible deadlock in dev_uc_sync_multiple (3) net 1 1356d 1352d 0/26 auto-closed as invalid on 2020/12/31 04:17
linux-4.19 possible deadlock in dev_uc_sync_multiple (3) C error 7 472d 651d 0/1 upstream: reported C repro on 2022/08/08 00:40
linux-4.19 possible deadlock in dev_uc_sync_multiple (2) 11 789d 969d 0/1 auto-closed as invalid on 2022/07/21 03:12
upstream possible deadlock in dev_uc_sync_multiple net 1 1893d 1892d 0/26 auto-closed as invalid on 2019/09/11 09:05
upstream possible deadlock in dev_uc_sync_multiple (2) net 26 1411d 1421d 15/26 fixed on 2020/07/20 08:03
linux-4.19 possible deadlock in dev_uc_sync_multiple 1 1372d 1372d 0/1 auto-closed as invalid on 2020/12/15 01:55
linux-4.14 possible deadlock in dev_uc_sync_multiple (2) 9 584d 872d 0/1 auto-obsoleted due to no activity on 2023/02/11 03:42
linux-4.14 possible deadlock in dev_uc_sync_multiple 4 1125d 1357d 0/1 auto-closed as invalid on 2021/08/19 17:04

Sample crash report:
IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready
8021q: adding VLAN 0 to HW filter on device team0
======================================================
WARNING: possible circular locking dependency detected
4.14.305-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.1/13895 is trying to acquire lock:
 (&vlan_netdev_addr_lock_key/1){+...}, at: [<ffffffff85c6685b>] netif_addr_lock_nested include/linux/netdevice.h:3714 [inline]
 (&vlan_netdev_addr_lock_key/1){+...}, at: [<ffffffff85c6685b>] dev_uc_sync_multiple+0x10b/0x1c0 net/core/dev_addr_lists.c:574

but task is already holding lock:
 (&dev_addr_list_lock_key#2/1){+...}, at: [<ffffffff85c6634b>] netif_addr_lock_nested include/linux/netdevice.h:3714 [inline]
 (&dev_addr_list_lock_key#2/1){+...}, at: [<ffffffff85c6634b>] dev_mc_sync+0x10b/0x1c0 net/core/dev_addr_lists.c:765

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&dev_addr_list_lock_key#2/1){+...}:
       _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:362
       netif_addr_lock_nested include/linux/netdevice.h:3714 [inline]
       dev_mc_sync+0x10b/0x1c0 net/core/dev_addr_lists.c:765
       vlan_dev_set_rx_mode+0x38/0x80 net/8021q/vlan_dev.c:486
       __dev_set_rx_mode+0x191/0x2a0 net/core/dev.c:6724
       dev_set_rx_mode net/core/dev.c:6730 [inline]
       __dev_open+0x223/0x310 net/core/dev.c:1375
       dev_open+0xa9/0x110 drivers/media/usb/gspca/gspca.c:1296
       team_port_add drivers/net/team/team.c:1214 [inline]
       team_add_slave+0xa0f/0x1c40 drivers/net/team/team.c:1980
       do_set_master+0x19e/0x200 net/core/rtnetlink.c:1961
       rtnl_newlink+0x1356/0x1830 net/core/rtnetlink.c:2759
       rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322
       netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
       netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
       netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
       netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
       sock_sendmsg_nosec net/socket.c:646 [inline]
       sock_sendmsg+0xb5/0x100 net/socket.c:656
       ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
       __sys_sendmsg+0xa3/0x120 net/socket.c:2096
       SYSC_sendmsg net/socket.c:2107 [inline]
       SyS_sendmsg+0x27/0x40 net/socket.c:2103
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x5e/0xd3

-> #0 (&vlan_netdev_addr_lock_key/1){+...}:
       lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
       _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:362
       netif_addr_lock_nested include/linux/netdevice.h:3714 [inline]
       dev_uc_sync_multiple+0x10b/0x1c0 net/core/dev_addr_lists.c:574
       team_set_rx_mode+0xb8/0x1e0 drivers/net/team/team.c:1793
       __dev_set_rx_mode+0x191/0x2a0 net/core/dev.c:6724
       dev_mc_sync+0x17a/0x1c0 net/core/dev_addr_lists.c:768
       vlan_dev_set_rx_mode+0x38/0x80 net/8021q/vlan_dev.c:486
       __dev_set_rx_mode+0x191/0x2a0 net/core/dev.c:6724
       dev_set_rx_mode net/core/dev.c:6730 [inline]
       __dev_open+0x223/0x310 net/core/dev.c:1375
       __dev_change_flags+0x43f/0x540 net/core/dev.c:6802
       dev_change_flags+0x7e/0x130 net/core/dev.c:6868
       vlan_device_event+0x1261/0x1ad0 net/8021q/vlan.c:454
       notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93
       call_netdevice_notifiers_info net/core/dev.c:1667 [inline]
       call_netdevice_notifiers net/core/dev.c:1683 [inline]
       __dev_notify_flags+0xdf/0x260 net/core/dev.c:6840
       dev_change_flags+0xe6/0x130 net/core/dev.c:6873
       do_setlink+0x83f/0x2bf0 net/core/rtnetlink.c:2092
       rtnl_group_changelink net/core/rtnetlink.c:2512 [inline]
       rtnl_newlink+0xc9d/0x1830 net/core/rtnetlink.c:2668
       rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322
       netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
       netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
       netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
       netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
       sock_sendmsg_nosec net/socket.c:646 [inline]
       sock_sendmsg+0xb5/0x100 net/socket.c:656
       ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
       __sys_sendmsg+0xa3/0x120 net/socket.c:2096
       SYSC_sendmsg net/socket.c:2107 [inline]
       SyS_sendmsg+0x27/0x40 net/socket.c:2103
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x5e/0xd3

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&dev_addr_list_lock_key#2/1);
                               lock(&vlan_netdev_addr_lock_key/1);
                               lock(&dev_addr_list_lock_key#2/1);
  lock(&vlan_netdev_addr_lock_key/1);

 *** DEADLOCK ***

4 locks held by syz-executor.1/13895:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffff85c8dcdd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
 #1:  (&vlan_netdev_addr_lock_key#2/2){+...}, at: [<ffffffff85c5719b>] spin_lock_bh include/linux/spinlock.h:322 [inline]
 #1:  (&vlan_netdev_addr_lock_key#2/2){+...}, at: [<ffffffff85c5719b>] netif_addr_lock_bh include/linux/netdevice.h:3719 [inline]
 #1:  (&vlan_netdev_addr_lock_key#2/2){+...}, at: [<ffffffff85c5719b>] dev_set_rx_mode net/core/dev.c:6729 [inline]
 #1:  (&vlan_netdev_addr_lock_key#2/2){+...}, at: [<ffffffff85c5719b>] __dev_open+0x21b/0x310 net/core/dev.c:1375
 #2:  (&dev_addr_list_lock_key#2/1){+...}, at: [<ffffffff85c6634b>] netif_addr_lock_nested include/linux/netdevice.h:3714 [inline]
 #2:  (&dev_addr_list_lock_key#2/1){+...}, at: [<ffffffff85c6634b>] dev_mc_sync+0x10b/0x1c0 net/core/dev_addr_lists.c:765
 #3:  (rcu_read_lock){....}, at: [<ffffffff83d3f5c0>] team_set_rx_mode+0x0/0x1e0 drivers/net/team/team.c:514

stack backtrace:
CPU: 0 PID: 13895 Comm: syz-executor.1 Not tainted 4.14.305-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
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
 _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:362
 netif_addr_lock_nested include/linux/netdevice.h:3714 [inline]
 dev_uc_sync_multiple+0x10b/0x1c0 net/core/dev_addr_lists.c:574
 team_set_rx_mode+0xb8/0x1e0 drivers/net/team/team.c:1793
 __dev_set_rx_mode+0x191/0x2a0 net/core/dev.c:6724
 dev_mc_sync+0x17a/0x1c0 net/core/dev_addr_lists.c:768
 vlan_dev_set_rx_mode+0x38/0x80 net/8021q/vlan_dev.c:486
 __dev_set_rx_mode+0x191/0x2a0 net/core/dev.c:6724
 dev_set_rx_mode net/core/dev.c:6730 [inline]
 __dev_open+0x223/0x310 net/core/dev.c:1375
 __dev_change_flags+0x43f/0x540 net/core/dev.c:6802
 dev_change_flags+0x7e/0x130 net/core/dev.c:6868
 vlan_device_event+0x1261/0x1ad0 net/8021q/vlan.c:454
 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93
 call_netdevice_notifiers_info net/core/dev.c:1667 [inline]
 call_netdevice_notifiers net/core/dev.c:1683 [inline]
 __dev_notify_flags+0xdf/0x260 net/core/dev.c:6840
 dev_change_flags+0xe6/0x130 net/core/dev.c:6873
 do_setlink+0x83f/0x2bf0 net/core/rtnetlink.c:2092
 rtnl_group_changelink net/core/rtnetlink.c:2512 [inline]
 rtnl_newlink+0xc9d/0x1830 net/core/rtnetlink.c:2668
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f730e1840f9
RSP: 002b:00007f730c6d5168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f730e2a4050 RCX: 00007f730e1840f9
RDX: 0000000000000000 RSI: 0000000020006440 RDI: 0000000000000009
RBP: 00007f730e1dfae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd1372e1bf R14: 00007f730c6d5300 R15: 0000000000022000
chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19
caif:caif_disconnect_client(): nothing to disconnect
chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT
chnl_net:chnl_net_open(): state disconnected
A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check.
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19
caif:caif_disconnect_client(): nothing to disconnect
chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT
chnl_net:chnl_net_open(): state disconnected
A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check.
bridge0: port 3(team0) entered disabled state
bridge0: port 2(bridge_slave_1) entered disabled state
bridge0: port 1(bridge_slave_0) entered disabled state
batman_adv: batadv0: Interface deactivated: batadv_slave_0
batman_adv: batadv0: Interface deactivated: batadv_slave_1
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
8021q: adding VLAN 0 to HW filter on device bond0
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
8021q: adding VLAN 0 to HW filter on device team0
IPv6: ADDRCONF(NETDEV_UP): team0.4094: link is not ready
chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19
EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue
caif:caif_disconnect_client(): nothing to disconnect
chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT
chnl_net:chnl_net_open(): state disconnected
A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check.
IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
8021q: adding VLAN 0 to HW filter on device bond0
IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready
8021q: adding VLAN 0 to HW filter on device team0
chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19
caif:caif_disconnect_client(): nothing to disconnect
chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT
chnl_net:chnl_net_open(): state disconnected
A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check.
print_req_error: I/O error, dev loop4, sector 0
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue
IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
8021q: adding VLAN 0 to HW filter on device bond0
IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready
8021q: adding VLAN 0 to HW filter on device team0
IPv6: ADDRCONF(NETDEV_UP): team0.4094: link is not ready
chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19
caif:caif_disconnect_client(): nothing to disconnect
chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT
chnl_net:chnl_net_open(): state disconnected
A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check.
EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
8021q: adding VLAN 0 to HW filter on device bond0
EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue
IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready
8021q: adding VLAN 0 to HW filter on device team0
EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue
IPv6: ADDRCONF(NETDEV_UP): team0.4094: link is not ready
chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19
caif:caif_disconnect_client(): nothing to disconnect
chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT
chnl_net:chnl_net_open(): state disconnected
A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check.
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
kauditd_printk_skb: 10 callbacks suppressed
audit: type=1800 audit(1676632519.752:191): pid=14119 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.1" name="SYSV00000000" dev="hugetlbfs" ino=0 res=0
IPVS: ftp: loaded support on port[0] = 21
EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
audit: type=1800 audit(1676632520.622:192): pid=14211 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.1" name="SYSV00000000" dev="hugetlbfs" ino=98306 res=0
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
audit: type=1800 audit(1676632520.702:193): pid=14219 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.0" name="SYSV00000000" dev="hugetlbfs" ino=0 res=0
audit: type=1800 audit(1676632520.722:194): pid=14220 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.3" name="SYSV00000000" dev="hugetlbfs" ino=0 res=0
audit: type=1800 audit(1676632520.792:195): pid=14224 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.2" name="SYSV00000000" dev="hugetlbfs" ino=0 res=0
f2fs_msg: 4 callbacks suppressed
F2FS-fs (loop5): Found nat_bits in checkpoint
F2FS-fs (loop5): Mounted with checkpoint version = 48b305e5
audit: type=1800 audit(1676632521.042:196): pid=14240 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.4" name="SYSV00000000" dev="hugetlbfs" ino=0 res=0
attempt to access beyond end of device
loop5: rw=2049, want=45104, limit=40427
F2FS-fs (loop5): Found nat_bits in checkpoint
F2FS-fs (loop5): Mounted with checkpoint version = 48b305e5
attempt to access beyond end of device
loop5: rw=2049, want=45104, limit=40427
audit: type=1800 audit(1676632521.472:197): pid=14262 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.1" name="SYSV00000000" dev="hugetlbfs" ino=163843 res=0
audit: type=1800 audit(1676632521.602:198): pid=14273 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.3" name="SYSV00000000" dev="hugetlbfs" ino=98306 res=0
audit: type=1800 audit(1676632521.632:199): pid=14275 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.0" name="SYSV00000000" dev="hugetlbfs" ino=98306 res=0
audit: type=1800 audit(1676632521.692:200): pid=14277 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.2" name="SYSV00000000" dev="hugetlbfs" ino=98306 res=0
F2FS-fs (loop5): Found nat_bits in checkpoint
F2FS-fs (loop5): Mounted with checkpoint version = 48b305e5
attempt to access beyond end of device
loop5: rw=2049, want=45104, limit=40427
F2FS-fs (loop5): Found nat_bits in checkpoint
F2FS-fs (loop5): Mounted with checkpoint version = 48b305e5
attempt to access beyond end of device
loop5: rw=2049, want=45104, limit=40427
xt_hashlimit: overflow, rate too high: 0
xt_hashlimit: overflow, rate too high: 0
xt_hashlimit: overflow, rate too high: 0
xt_hashlimit: overflow, rate too high: 0
gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
gfs2: fsid=syz:syz: Now mounting FS...
gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents
gfs2: fsid=syz:syz.0: jid=0, already locked for use
gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
gfs2: fsid=syz:syz.0: jid=0: Done
gfs2: fsid=syz:syz.0: jid=1: Trying to acquire journal lock...
gfs2: fsid=syz:syz.0: jid=1: Looking at journal...
gfs2: fsid=syz:syz.0: jid=1: Done
gfs2: fsid=syz:syz.0: first mount done, others may mount
IPVS: sync thread started: state = MASTER, mcast_ifn = macvlan1, syncid = 3, id = 0
Cannot find del_set index 0 as target
netlink: 52 bytes leftover after parsing attributes in process `syz-executor.0'.
nbd: socks must be embedded in a SOCK_ITEM attr
Cannot find del_set index 0 as target
netlink: 52 bytes leftover after parsing attributes in process `syz-executor.0'.
nbd: socks must be embedded in a SOCK_ITEM attr
Cannot find del_set index 0 as target
netlink: 52 bytes leftover after parsing attributes in process `syz-executor.0'.
nbd: socks must be embedded in a SOCK_ITEM attr
Cannot find del_set index 0 as target
netlink: 52 bytes leftover after parsing attributes in process `syz-executor.0'.
nbd: socks must be embedded in a SOCK_ITEM attr
Cannot find del_set index 0 as target
netlink: 52 bytes leftover after parsing attributes in process `syz-executor.0'.
nbd: socks must be embedded in a SOCK_ITEM attr
gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
gfs2: fsid=syz:syz: Now mounting FS...
kauditd_printk_skb: 11 callbacks suppressed
audit: type=1800 audit(1676632525.062:212): pid=14471 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.1" name="SYSV00000000" dev="hugetlbfs" ino=425991 res=0
IPVS: sync thread started: state = MASTER, mcast_ifn = macvlan1, syncid = 3, id = 0
gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents
netlink: 52 bytes leftover after parsing attributes in process `syz-executor.5'.
Cannot find del_set index 0 as target
Cannot find del_set index 0 as target
gfs2: fsid=syz:syz.0: jid=0, already locked for use
gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
nbd: socks must be embedded in a SOCK_ITEM attr
gfs2: fsid=syz:syz.0: jid=0: Done
gfs2: fsid=syz:syz.0: jid=1: Trying to acquire journal lock...
gfs2: fsid=syz:syz.0: jid=1: Looking at journal...
netlink: 52 bytes leftover after parsing attributes in process `syz-executor.0'.
gfs2: fsid=syz:syz.0: jid=1: Done
gfs2: fsid=syz:syz.0: first mount done, others may mount
nbd: socks must be embedded in a SOCK_ITEM attr
Cannot find del_set index 0 as target
Cannot find del_set index 0 as target
netlink: 52 bytes leftover after parsing attributes in process `syz-executor.0'.
nbd: socks must be embedded in a SOCK_ITEM attr
netlink: 52 bytes leftover after parsing attributes in process `syz-executor.5'.
nbd: socks must be embedded in a SOCK_ITEM attr
Cannot find del_set index 0 as target

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/02/17 11:15 linux-4.14.y a8ad60f2af58 3e7039f4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 possible deadlock in dev_uc_sync_multiple
* Struck through repros no longer work on HEAD.