INFO: task hung in ib_get_eth_speed

Status: auto-obsoleted due to no activity on 2024/09/05 23:36
Reported-by: syzbot+ded81c165fe19cd13fe8@syzkaller.appspotmail.com
First crash: 806d, last: 806d
▶ ▼ Similar bugs (9)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in ib_get_eth_speed (6) rdma 1 13 783d 823d 0/29 auto-obsoleted due to no activity on 2024/08/09 22:34
upstream INFO: task hung in ib_get_eth_speed (4) rdma 1 1 1371d 1371d 0/29 auto-obsoleted due to no activity on 2023/01/16 13:45
upstream INFO: task hung in ib_get_eth_speed (7) rdma 1 11 529d 699d 0/29 auto-obsoleted due to no activity on 2025/05/30 11:17
upstream INFO: task hung in ib_get_eth_speed (2) rdma 1 1 2032d 2032d 0/29 auto-closed as invalid on 2021/04/19 20:20
upstream INFO: task hung in ib_get_eth_speed (3) rdma 1 6 1710d 1797d 0/29 closed as invalid on 2022/02/07 19:19
upstream INFO: task hung in ib_get_eth_speed (9) prio:normal rdma 1 8 107d 275d 0/29 auto-obsoleted due to no activity on 2026/07/26 21:36
upstream INFO: task hung in ib_get_eth_speed (5) rdma 1 1 932d 932d 0/29 auto-obsoleted due to no activity on 2024/04/22 19:58
upstream INFO: task hung in ib_get_eth_speed rdma 1 1 2201d 2201d 0/29 auto-closed as invalid on 2020/10/31 18:13
upstream INFO: task hung in ib_get_eth_speed (8) rdma 1 1 427d 427d 0/29 auto-obsoleted due to no activity on 2025/09/09 11:16

Sample crash report:
INFO: task kworker/1:18:3880 blocked for more than 143 seconds.
      Not tainted 6.1.92-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:18    state:D stack:23800 pid:3880  ppid:2      flags:0x00004000
Workqueue: events smc_ib_port_event_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
 ib_get_eth_speed+0x144/0x510 drivers/infiniband/core/verbs.c:1897
 rxe_query_port+0x5a/0x1a0 drivers/infiniband/sw/rxe/rxe_verbs.c:38
 __ib_query_port drivers/infiniband/core/device.c:2067 [inline]
 ib_query_port+0x15f/0x7c0 drivers/infiniband/core/device.c:2099
 smc_ib_remember_port_attr net/smc/smc_ib.c:364 [inline]
 smc_ib_port_event_work+0x15d/0xa60 net/smc/smc_ib.c:388
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task kworker/u4:10:3889 blocked for more than 143 seconds.
      Not tainted 6.1.92-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:10   state:D stack:20352 pid:3889  ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:310 [inline]
 nsim_create+0x30c/0x3f0 drivers/net/netdevsim/netdev.c:365
 __nsim_dev_port_add+0x6ba/0xb10 drivers/net/netdevsim/dev.c:1393

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/28 23:35 linux-6.1.y 88690811da69 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in ib_get_eth_speed
* Struck through repros no longer work on HEAD.