INFO: task hung in nsim_fib

Kernel	Title	Count	Last	Reported	Patched	Status
upstream	INFO: task hung in nsim_fib_destroy (3) net	1	617d	617d	0/26	auto-obsoleted due to no activity on 2022/11/15 10:21
upstream	INFO: task hung in nsim_fib_destroy net	1	927d	927d	0/26	auto-closed as invalid on 2022/01/09 18:53
upstream	INFO: task hung in nsim_fib_destroy (4) net	3	341d	373d	0/26	auto-obsoleted due to no activity on 2023/08/18 17:42

INFO: task syz-executor.5:19810 blocked for more than 143 seconds. Not tainted 5.16.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:25312 pid:19810 ppid: 3636 flags:0x00004004 Call Trace: <TASK> context_switch kernel/sched/core.c:4972 [inline] __schedule+0xa9a/0x4900 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 __flush_work+0x56c/0xb10 kernel/workqueue.c:3084 nsim_fib_destroy+0x8c/0x1a0 drivers/net/netdevsim/fib.c:1618 nsim_dev_reload_destroy+0x191/0x300 drivers/net/netdevsim/dev.c:1653 nsim_dev_reload_down+0xdf/0x180 drivers/net/netdevsim/dev.c:964 devlink_reload+0x53b/0x6b0 net/core/devlink.c:4072 devlink_nl_cmd_reload+0x57f/0x1280 net/core/devlink.c:4193 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x904/0xdf0 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2413 ___sys_sendmsg+0xf3/0x170 net/socket.c:2467 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2496 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7ff94f954e99 RSP: 002b:00007ff94e2a9168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff94fa68030 RCX: 00007ff94f954e99 RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000005 RBP: 00007ff94f9aeff1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff9de74f3f R14: 00007ff94e2a9300 R15: 0000000000022000 </TASK> Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8bb83da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 2 locks held by kworker/u4:4/513: #0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478 #1: ffff8880b9d279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x173/0x490 kernel/sched/psi.c:871 2 locks held by getty/3286: #0: ffff88814aa19098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 3 locks held by kworker/1:3/10261: #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x896/0x1660 kernel/workqueue.c:2269 #1: ffffc900047a7db0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1660 kernel/workqueue.c:2273 #2: ffff888031ca0240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1b9/0x2490 drivers/net/netdevsim/fib.c:1474 4 locks held by syz-executor.5/19810: #0: ffffffff8d3a95f0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802 #1: ffffffff8d3a96a8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8d3a96a8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 #2: ffffffff8d343388 (devlink_mutex){+.+.}-{3:3}, at: devlink_nl_pre_doit+0x2b/0xa00 net/core/devlink.c:607 #3: ffff88804f0a65c0 (&nsim_bus_dev->nsim_bus_reload_lock){+.+.}-{3:3}, at: nsim_dev_reload_down+0x4d/0x180 drivers/net/netdevsim/dev.c:951 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 513 Comm: kworker/u4:4 Not tainted 5.16.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:check_region_inline mm/kasan/generic.c:170 [inline] RIP: 0010:kasan_check_range+0x12c/0x180 mm/kasan/generic.c:189 Code: 00 74 ef 49 8d 04 2c 48 85 d2 75 0b 48 89 da 48 29 c2 e9 55 ff ff ff 49 39 d2 75 17 49 0f be 02 41 83 e1 07 49 39 c1 7d 0a 5b <b8> 01 00 00 00 5d 41 5c c3 44 89 c2 e8 53 ef ff ff 5b 83 f0 01 5d RSP: 0018:ffffc9000326f660 EFLAGS: 00000046 RAX: fffffbfff1ff3741 RBX: 0000000000000036 RCX: ffffffff815c6155 RDX: fffffbfff1ff3741 RSI: 0000000000000008 RDI: ffffffff8ff9ba00 RBP: fffffbfff1ff3740 R08: 0000000000000000 R09: ffffffff8ff9ba07 R10: fffffbfff1ff3740 R11: 0000000000000001 R12: ffff8880193da7d8 R13: ffff8880193d9d00 R14: ffffffff8d924308 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f70ac94d990 CR3: 0000000013390000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] hlock_class kernel/locking/lockdep.c:199 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3713 [inline] validate_chain kernel/locking/lockdep.c:3769 [inline] __lock_acquire+0x1655/0x5470 kernel/locking/lockdep.c:5027 lock_acquire kernel/locking/lockdep.c:5637 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 rcu_note_context_switch+0x2ea/0x17c0 kernel/rcu/tree_plugin.h:322 __schedule+0x238/0x4900 kernel/sched/core.c:6150 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6668 irqentry_exit+0x31/0x80 kernel/entry/common.c:425 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5605 Code: c6 a5 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc9000326fb30 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff9200064df68 RCX: d950c196984fa138 RDX: 1ffff1100327b4eb RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ff9ba07 R10: fffffbfff1ff3740 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff8bb83da0 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:268 [inline] rcu_read_lock include/linux/rcupdate.h:688 [inline] batadv_nc_process_nc_paths.part.0+0xec/0x3c0 net/batman-adv/network-coding.c:687 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:679 [inline] batadv_nc_worker+0xce4/0xfa0 net/batman-adv/network-coding.c:735 process_one_work+0x9b2/0x1660 kernel/workqueue.c:2298 worker_thread+0x65d/0x1130 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> ---------------- Code disassembly (best guess): 0: 00 74 ef 49 add %dh,0x49(%rdi,%rbp,8) 4: 8d 04 2c lea (%rsp,%rbp,1),%eax 7: 48 85 d2 test %rdx,%rdx a: 75 0b jne 0x17 c: 48 89 da mov %rbx,%rdx f: 48 29 c2 sub %rax,%rdx 12: e9 55 ff ff ff jmpq 0xffffff6c 17: 49 39 d2 cmp %rdx,%r10 1a: 75 17 jne 0x33 1c: 49 0f be 02 movsbq (%r10),%rax 20: 41 83 e1 07 and $0x7,%r9d 24: 49 39 c1 cmp %rax,%r9 27: 7d 0a jge 0x33 29: 5b pop %rbx * 2a: b8 01 00 00 00 mov $0x1,%eax <-- trapping instruction 2f: 5d pop %rbp 30: 41 5c pop %r12 32: c3 retq 33: 44 89 c2 mov %r8d,%edx 36: e8 53 ef ff ff callq 0xffffef8e 3b: 5b pop %rbx 3c: 83 f0 01 xor $0x1,%eax 3f: 5d pop %rbp