INFO: task hung in rdma_dev_exit_net

Status: upstream: reported on 2026/10/15 02:19
Reported-by: syzbot+78f4296869b73f68534f@syzkaller.appspotmail.com
First crash: 14d, last: 7d17h
▶ ▼ Similar bugs (7)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in rdma_dev_exit_net (2) rdma 1 6 2087d 2221d 0/29 auto-closed as invalid on 2021/05/10 22:49
upstream INFO: task hung in rdma_dev_exit_net (3) rdma 1 5 1835d 1870d 0/29 auto-closed as invalid on 2022/01/17 19:05
upstream INFO: task hung in rdma_dev_exit_net rdma 1 1 2381d 2381d 0/29 auto-closed as invalid on 2020/07/21 12:21
upstream INFO: task hung in rdma_dev_exit_net (5) rdma 1 4 1011d 1026d 0/29 auto-obsoleted due to no activity on 2024/04/21 00:36
linux-5.15 INFO: task hung in rdma_dev_exit_net 1 1 400d 400d 0/3 auto-obsoleted due to no activity on 2026/01/02 06:39
upstream INFO: task hung in rdma_dev_exit_net (4) rdma 1 7 1209d 1372d 0/29 auto-obsoleted due to no activity on 2023/10/05 19:47
upstream INFO: task hung in rdma_dev_exit_net (6) prio:high rdma 1 334 7h31m 678d 0/29 upstream: reported on 2024/12/20 08:21

Sample crash report:
INFO: task syz-executor:9137 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:25320 pid:9137  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5393 [inline]
 __schedule+0x15ae/0x4700 kernel/sched/core.c:6722
 schedule+0xbd/0x170 kernel/sched/core.c:6796
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6855
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x673/0xc80 kernel/locking/mutex.c:747
 remove_one_compat_dev drivers/infiniband/core/device.c:1008 [inline]
 rdma_dev_exit_net+0x1ad/0x340 drivers/infiniband/core/device.c:1150
 ops_exit_list net/core/net_namespace.c:173 [inline]
 setup_net+0x7e5/0xa20 net/core/net_namespace.c:375

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/21 21:42 linux-6.6.y 0aebf2870d53 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan INFO: task hung in rdma_dev_exit_net
2026/10/21 08:06 linux-6.6.y cecd39af8a1a 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan INFO: task hung in rdma_dev_exit_net
2026/10/17 06:42 linux-6.6.y cecd39af8a1a 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan INFO: task hung in rdma_dev_exit_net
2026/10/15 02:18 linux-6.6.y a91a6aa9253c 8fb0ae89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan INFO: task hung in rdma_dev_exit_net
* Struck through repros no longer work on HEAD.