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INFO: task hung in genl_rcv_msg

Status: upstream: reported syz repro on 2019/05/02 15:34
Reported-by: syzbot+593571e1fa1efd8f0ae6@syzkaller.appspotmail.com
First crash: 2047d, last: 670d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Similar bugs (9)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in genl_rcv_msg (2) net 2 519d 552d 0/28 auto-obsoleted due to no activity on 2023/10/06 17:32
upstream INFO: task hung in genl_rcv_msg (3) net C done 13 250d 392d 0/28 closed as invalid on 2024/04/16 10:15
upstream INFO: task hung in genl_rcv_msg (4) net C done 60 17d 66d 0/28 upstream: reported C repro on 2024/10/02 23:00
linux-6.1 INFO: task hung in genl_rcv_msg (2) 2 48d 76d 0/3 upstream: reported on 2024/09/23 16:25
upstream INFO: task hung in genl_rcv_msg syz done error 648 698d 2246d 0/28 auto-obsoleted due to no activity on 2023/05/10 03:30
linux-4.14 INFO: task hung in genl_rcv_msg (2) 6 1481d 1670d 0/1 auto-closed as invalid on 2021/03/17 23:44
linux-6.1 INFO: task hung in genl_rcv_msg 1 357d 357d 0/3 auto-obsoleted due to no activity on 2024/03/26 09:02
linux-4.14 INFO: task hung in genl_rcv_msg syz done 2 1787d 1787d 1/1 fixed on 2020/02/16 23:53
linux-5.15 INFO: task hung in genl_rcv_msg 1 494d 494d 0/3 auto-obsoleted due to no activity on 2023/11/09 20:26
▶ ▼ Fix bisection attempts (3)
Created Duration User Patch Repo Result
2020/04/19 10:25 21m bisect fix linux-4.19.y error job log
2020/01/16 23:59 38m bisect fix linux-4.19.y OK (0) job log log
2019/12/17 23:21 37m bisect fix linux-4.19.y OK (0) job log log

Sample crash report:
NOHZ: local_softirq_pending 08
INFO: task syz-executor.4:14329 blocked for more than 140 seconds.
      Not tainted 4.19.111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D26880 14329   8389 0x00000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416501
Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc
RSP: 002b:00007fbed5b409c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fbed5b40a58 RCX: 0000000000416501
RDX: 0000000000000000 RSI: 00007fbed5b40a00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fbed5b40a40
R13: 0000000000000bc1 R14: 00000000004d80f0 R15: 000000000076bf0c
INFO: task syz-executor.4:14332 blocked for more than 140 seconds.
      Not tainted 4.19.111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D28896 14332   8389 0x00000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: Bad RIP value.
RSP: 002b:00007fbed5b1fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fbed5b206d4 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004
RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009d0 R14: 00000000004cc7f2 R15: 000000000076bfac
INFO: task syz-executor.3:14334 blocked for more than 140 seconds.
      Not tainted 4.19.111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D28896 14334   8388 0x00000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416501
Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc
RSP: 002b:00007f9eb216c9c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9eb216ca58 RCX: 0000000000416501
RDX: 0000000000000000 RSI: 00007f9eb216ca00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f9eb216ca40
R13: 0000000000000bc1 R14: 00000000004d80f0 R15: 000000000076bf0c
INFO: task syz-executor.3:14341 blocked for more than 140 seconds.
      Not tainted 4.19.111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D28896 14341   8388 0x00000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416501
Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc
RSP: 002b:00007f9eb214b9c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9eb214ba58 RCX: 0000000000416501
RDX: 0000000000000000 RSI: 00007f9eb214ba00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f9eb214ba40
R13: 0000000000000bc1 R14: 00000000004d80f0 R15: 000000000076bfac
INFO: task syz-executor.0:14338 blocked for more than 140 seconds.
      Not tainted 4.19.111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D28896 14338   8392 0x00000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416501
Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc
RSP: 002b:00007f5f828b59c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f5f828b5a58 RCX: 0000000000416501
RDX: 0000000000000000 RSI: 00007f5f828b5a00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f5f828b5a40
R13: 0000000000000bc1 R14: 00000000004d80f0 R15: 000000000076bf0c
INFO: task syz-executor.0:14343 blocked for more than 140 seconds.
      Not tainted 4.19.111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D28896 14343   8392 0x00000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416501
Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc
RSP: 002b:00007f5f828949c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f5f82894a58 RCX: 0000000000416501
RDX: 0000000000000000 RSI: 00007f5f82894a00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f5f82894a40
R13: 0000000000000bc1 R14: 00000000004d80f0 R15: 000000000076bfac
INFO: task syz-executor.2:14339 blocked for more than 140 seconds.
      Not tainted 4.19.111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D28896 14339   8385 0x00000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416501
Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc
RSP: 002b:00007f217e3559c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f217e355a58 RCX: 0000000000416501
RDX: 0000000000000000 RSI: 00007f217e355a00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f217e355a40
R13: 0000000000000bc1 R14: 00000000004d80f0 R15: 000000000076bf0c
INFO: task syz-executor.2:14344 blocked for more than 140 seconds.
      Not tainted 4.19.111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D28896 14344   8385 0x00000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416501
Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc
RSP: 002b:00007f217e3349c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f217e334a58 RCX: 0000000000416501
RDX: 0000000000000000 RSI: 00007f217e334a00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f217e334a40
R13: 0000000000000bc1 R14: 00000000004d80f0 R15: 000000000076bfac
INFO: task syz-executor.1:14342 blocked for more than 140 seconds.
      Not tainted 4.19.111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D28448 14342   8394 0x00000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416501
Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc
RSP: 002b:00007f4d6f9ae9c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f4d6f9aea58 RCX: 0000000000416501
RDX: 0000000000000000 RSI: 00007f4d6f9aea00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f4d6f9aea40
R13: 0000000000000bc1 R14: 00000000004d80f0 R15: 000000000076bf0c
INFO: task syz-executor.1:14345 blocked for more than 140 seconds.
      Not tainted 4.19.111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D28896 14345   8394 0x00000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416501
Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc
RSP: 002b:00007f4d6f98d9c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f4d6f98da58 RCX: 0000000000416501
RDX: 0000000000000000 RSI: 00007f4d6f98da00 RDI: 0000000000000003
RBP: 0000000000000003 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f4d6f98da40
R13: 0000000000000bc1 R14: 00000000004d80f0 R15: 000000000076bfac

Showing all locks held in the system:
1 lock held by khungtaskd/1082:
 #0: 000000004fe1e038 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4436
1 lock held by rsyslogd/8217:
 #0: 0000000031e84ded (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 fs/file.c:767
2 locks held by getty/8339:
 #0: 0000000058dd84af (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: 000000009a2c40c1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154
2 locks held by getty/8340:
 #0: 00000000345533d2 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: 000000008a742c9e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154
2 locks held by getty/8341:
 #0: 000000001469974b (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: 000000000e91a108 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154
2 locks held by getty/8342:
 #0: 000000008f0794dc (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: 00000000f5503946 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154
2 locks held by getty/8343:
 #0: 00000000c1525c77 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: 00000000d8c6f8a7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154
2 locks held by getty/8344:
 #0: 00000000646fbad3 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: 000000002ec789a2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154
2 locks held by getty/8345:
 #0: 00000000ebe2f832 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: 0000000099bebc50 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154
2 locks held by syz-executor.5/14330:
2 locks held by syz-executor.4/14329:
 #0: 00000000dbd25eb9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
2 locks held by syz-executor.4/14332:
 #0: 00000000dbd25eb9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
2 locks held by syz-executor.3/14334:
 #0: 00000000dbd25eb9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
2 locks held by syz-executor.3/14341:
 #0: 00000000dbd25eb9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
2 locks held by syz-executor.0/14338:
 #0: 00000000dbd25eb9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
2 locks held by syz-executor.0/14343:
 #0: 00000000dbd25eb9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
2 locks held by syz-executor.2/14339:
 #0: 00000000dbd25eb9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
2 locks held by syz-executor.2/14344:
 #0: 00000000dbd25eb9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
2 locks held by syz-executor.1/14342:
 #0: 00000000dbd25eb9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625
2 locks held by syz-executor.1/14345:
 #0: 00000000dbd25eb9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: 00000000542ff8f8 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1082 Comm: khungtaskd Not tainted 4.19.111-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
 watchdog+0x962/0xe40 kernel/hung_task.c:287
 kthread+0x34a/0x420 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 14330 Comm: syz-executor.5 Not tainted 4.19.111-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:separate_irq_context kernel/locking/lockdep.c:3054 [inline]
RIP: 0010:__lock_acquire+0x7f8/0x49c0 kernel/locking/lockdep.c:3402
Code: 48 8b b4 24 88 00 00 00 48 8d 04 80 4c 8d 6c c6 d8 48 b8 00 00 00 00 00 fc ff df 49 8d 7d 21 48 89 fa 48 c1 ea 03 0f b6 04 02 <48> 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 d9 2e 00 00 49 8d 7a 21
RSP: 0018:ffff88808075eba0 EFLAGS: 00000806
RAX: 0000000000000000 RBX: 000000000000002d RCX: 1ffff11014fcb5d6
RDX: 1ffff11014fcb5d1 RSI: ffff8880a7e5ae40 RDI: ffff8880a7e5ae89
RBP: ffff88808075ed70 R08: 0000000000000000 R09: 0000000000000002
R10: ffff8880a7e5ae90 R11: 000000000000002d R12: 088000d92f67e7c1
R13: ffff8880a7e5ae68 R14: ffff8880a7e5a5c0 R15: 0000000000000000
FS:  00007fa033caa700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 0000000092f70000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x170/0x400 kernel/locking/lockdep.c:3903
 rcu_lock_acquire include/linux/rcupdate.h:242 [inline]
 rcu_read_lock include/linux/rcupdate.h:627 [inline]
 net_generic include/net/netns/generic.h:44 [inline]
 tipc_sk_lookup+0xc7/0xb20 net/tipc/socket.c:2723
 tipc_nl_publ_dump+0x1d4/0xc90 net/tipc/socket.c:3531
 __tipc_nl_compat_dumpit.isra.0+0x1f2/0x8c0 net/tipc/netlink_compat.c:207
 tipc_nl_compat_publ_dump net/tipc/netlink_compat.c:1008 [inline]
 tipc_nl_compat_sk_dump+0x506/0x8a0 net/tipc/netlink_compat.c:1059
 __tipc_nl_compat_dumpit.isra.0+0x2e8/0x8c0 net/tipc/netlink_compat.c:216
 tipc_nl_compat_dumpit+0x243/0x500 net/tipc/netlink_compat.c:288
 tipc_nl_compat_handle net/tipc/netlink_compat.c:1258 [inline]
 tipc_nl_compat_recv+0x57c/0xa70 net/tipc/netlink_compat.c:1296
 genl_family_rcv_msg+0x627/0xc10 net/netlink/genetlink.c:602
 genl_rcv_msg+0xbf/0x160 net/netlink/genetlink.c:627
 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa033ca9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa033caa6d4 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004
RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009d0 R14: 00000000004cc7f2 R15: 000000000076bfac

Crashes (17):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/03/20 10:25 linux-4.19.y 93556fb211fa 2c31c529 .config console log report syz ci2-linux-4-19
2020/02/03 08:39 linux-4.19.y 32ee7492f104 93e5e335 .config console log report syz ci2-linux-4-19
2019/10/27 22:18 linux-4.19.y c3038e718a19 25bb509e .config console log report syz ci2-linux-4-19
2019/10/14 03:35 linux-4.19.y dafd634415a7 2f661ec4 .config console log report syz ci2-linux-4-19
2019/08/25 21:58 linux-4.19.y def4c11b3131 d21c5d9d .config console log report syz ci2-linux-4-19
2019/06/13 04:08 linux-4.19.y 768292d05361 3f4e812b .config console log report syz ci2-linux-4-19
2019/05/02 14:33 linux-4.19.y a03957ab0fd5 1852eb18 .config console log report syz ci2-linux-4-19
2023/02/07 08:48 linux-4.19.y 3f8a27f9e27b 5bc3be51 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in genl_rcv_msg
2022/10/29 03:24 linux-4.19.y 3f8a27f9e27b 899d812a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in genl_rcv_msg
2022/03/02 16:30 linux-4.19.y 3f8a27f9e27b 45a13a73 .config console log report info ci2-linux-4-19 INFO: task hung in genl_rcv_msg
2020/07/12 17:55 linux-4.19.y dce0f88600e4 115e1930 .config console log report ci2-linux-4-19
2020/03/20 06:48 linux-4.19.y 93556fb211fa 2c31c529 .config console log report ci2-linux-4-19
2020/02/27 02:40 linux-4.19.y f25804f38984 251aabb7 .config console log report ci2-linux-4-19
2020/02/23 20:03 linux-4.19.y 4fccc2503536 2c36e7a7 .config console log report ci2-linux-4-19
2020/02/03 06:00 linux-4.19.y 32ee7492f104 93e5e335 .config console log report ci2-linux-4-19
2019/10/27 19:41 linux-4.19.y c3038e718a19 25bb509e .config console log report ci2-linux-4-19
2019/08/26 09:59 linux-4.19.y def4c11b3131 d21c5d9d .config console log report ci2-linux-4-19
* Struck through repros no longer work on HEAD.