INFO: task hung in unregister_nexthop_notifier (4)

Status: auto-obsoleted due to no activity on 2025/05/25 05:10
Subsystems: net
[Documentation on labels]
First crash: 536d, last: 536d
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in unregister_nexthop_notifier (3) net 1 7 632d 686d 0/29 auto-obsoleted due to no activity on 2025/02/17 23:47
upstream INFO: task hung in unregister_nexthop_notifier (5) net 1 1 278d 278d 0/29 auto-obsoleted due to no activity on 2026/01/08 04:28
upstream INFO: task hung in unregister_nexthop_notifier (2) net 1 15 760d 815d 0/29 auto-obsoleted due to no activity on 2024/09/07 21:36
linux-5.15 INFO: task hung in unregister_nexthop_notifier 1 1 805d 805d 0/3 auto-obsoleted due to no activity on 2024/09/08 17:20
upstream INFO: task hung in unregister_nexthop_notifier net 1 1 1137d 1137d 0/29 auto-obsoleted due to no activity on 2023/10/02 08:35

Sample crash report:
INFO: task syz-executor:7988 blocked for more than 153 seconds.
      Not tainted 6.14.0-rc3-syzkaller-00154-g28b04731a38c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:20304 pid:7988  tgid:7988  ppid:1      task_flags:0x480140 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6765
 __schedule_loop kernel/sched/core.c:6842 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6857
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
 __mutex_lock_common kernel/locking/mutex.c:662 [inline]
 __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
 unregister_nexthop_notifier+0x17/0x40 net/ipv4/nexthop.c:3906
 nsim_fib_destroy+0x89/0x180 drivers/net/netdevsim/fib.c:1657
 nsim_dev_reload_destroy+0x2e3/0x490 drivers/net/netdevsim/dev.c:1665
 nsim_drv_remove+0x58/0x160 drivers/net/netdevsim/dev.c:1676
 device_remove drivers/base/dd.c:567 [inline]
 __device_release_driver drivers/base/dd.c:1273 [inline]
 device_release_driver_internal+0x4a9/0x7c0 drivers/base/dd.c:1296
 bus_remove_device+0x34f/0x420 drivers/base/bus.c:579
 device_del+0x57a/0x9b0 drivers/base/core.c:3854
 device_unregister+0x20/0xc0 drivers/base/core.c:3895
 nsim_bus_dev_del drivers/net/netdevsim/bus.c:462 [inline]
 del_device_store+0x363/0x480 drivers/net/netdevsim/bus.c:226
 kernfs_fop_write_iter+0x3a0/0x500 fs/kernfs/file.c:334
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xacf/0xd10 fs/read_write.c:679
 ksys_write+0x18f/0x2b0 fs/read_write.c:731
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fee95d8bc1f
RSP: 002b:00007ffcc01b2490 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fee95d8bc1f
RDX: 0000000000000001 RSI: 00007ffcc01b24e0 RDI: 0000000000000005
RBP: 00007fee95e0f4fd R08: 0000000000000000 R09: 00007ffcc01b22e7
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffcc01b24e0 R14: 00007fee96ad4620 R15: 0000000000000003
 </TASK>
INFO: task syz.2.587:8157 blocked for more than 158 seconds.
      Not tainted 6.14.0-rc3-syzkaller-00154-g28b04731a38c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.587       state:D stack:23632 pid:8157  tgid:8150  ppid:5845   task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6765
 __schedule_loop kernel/sched/core.c:6842 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6857
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
 __mutex_lock_common kernel/locking/mutex.c:662 [inline]
 __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
 nl80211_pre_doit+0x5f/0x8b0 net/wireless/nl80211.c:16664
 genl_family_rcv_msg_doit net/netlink/genetlink.c:1110 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0xab5/0xec0 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2533
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1338
 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1882
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:733
 ____sys_sendmsg+0x53a/0x860 net/socket.c:2573
 ___sys_sendmsg net/socket.c:2627 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2659
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe91eb8d169
RSP: 002b:00007fe91fab1038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fe91eda6080 RCX: 00007fe91eb8d169
RDX: 0000000000008080 RSI: 0000400000000280 RDI: 000000000000000b
RBP: 00007fe91ec0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe91eda6080 R15: 00007ffe34bf7298
 </TASK>
INFO: task syz.2.587:8158 blocked for more than 161 seconds.
      Not tainted 6.14.0-rc3-syzkaller-00154-g28b04731a38c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.587       state:D stack:23864 pid:8158  tgid:8150  ppid:5845   task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6765
 __schedule_loop kernel/sched/core.c:6842 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6857
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
 __mutex_lock_common kernel/locking/mutex.c:662 [inline]
 __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
 nl80211_pre_doit+0x5f/0x8b0 net/wireless/nl80211.c:16664
 genl_family_rcv_msg_doit net/netlink/genetlink.c:1110 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0xab5/0xec0 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2533
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1338
 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1882
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:733
 ____sys_sendmsg+0x53a/0x860 net/socket.c:2573
 ___sys_sendmsg net/socket.c:2627 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2659
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe91eb8d169
RSP: 002b:00007fe91fa90038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fe91eda6160 RCX: 00007fe91eb8d169
RDX: 0000000000008080 RSI: 0000400000000280 RDI: 000000000000000b
RBP: 00007fe91ec0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/24 05:00 net 28b04731a38c d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in unregister_nexthop_notifier
* Struck through repros no longer work on HEAD.