syzbot


INFO: task hung in rxrpc_destroy_all_calls

Status: auto-closed as invalid on 2022/05/08 23:28
Reported-by: syzbot+b2a13ca04eb40b3bbf4f@syzkaller.appspotmail.com
First crash: 392d, last: 392d
similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in rxrpc_destroy_all_calls (2) 1 388d 388d 0/24 auto-closed as invalid on 2022/04/12 22:15
upstream INFO: task hung in rxrpc_destroy_all_calls 13 1211d 1251d 0/24 auto-closed as invalid on 2020/01/11 01:03
upstream INFO: task hung in rxrpc_destroy_all_calls (3) 352 46d 58d 0/24 upstream: reported on 2022/12/09 07:19

Sample crash report:
ieee802154 phy1 wpan1: encryption failed: -22
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
INFO: task kworker/u4:8:10107 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:8    D25496 10107      2 0x80000000
Workqueue: netns cleanup_net
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 rxrpc_destroy_all_calls+0x1e7/0x570 net/rxrpc/call_object.c:756
 rxrpc_exit_net+0x1a9/0x2f0 net/rxrpc/net_ns.c:122
 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153
 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Showing all locks held in the system:
2 locks held by kworker/1:0/19:
 #0: 00000000402b6ffd ((wq_completion)"cgroup_destroy"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 0000000051b2415b (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline]
 #1: 0000000051b2415b (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci2-linux-4-19 2022/01/08 23:27 linux-4.19.y 3f8a27f9e27b 2ca0d385 .config console log report info INFO: task hung in rxrpc_destroy_all_calls
* Struck through repros no longer work on HEAD.