INFO: task kworker/u8:1:12 blocked for more than 142 seconds.
Not tainted 6.10.0-syzkaller-12881-g6342649c33d2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:1 state:D stack:23216 pid:12 tgid:12 ppid:2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
rwsem_down_write_slowpath+0x539/0x12a0 kernel/locking/rwsem.c:1178
__down_write_common kernel/locking/rwsem.c:1306 [inline]
__down_write kernel/locking/rwsem.c:1315 [inline]
down_write+0x1d8/0x200 kernel/locking/rwsem.c:1580
rdma_dev_exit_net+0x178/0x590 drivers/infiniband/core/device.c:1129
ops_exit_list+0xb0/0x180 net/core/net_namespace.c:173
cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:640
process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Showing all locks held in the system:
4 locks held by kworker/u8:1/12:
#0: ffff8880166e3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc90000117d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:594
#3: ffffffff8f65c130 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_exit_net+0x178/0x590 drivers/infiniband/core/device.c:1129
1 lock held by khungtaskd/30:
#0: ffffffff8ddb5220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8ddb5220 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8ddb5220 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6620
2 locks held by getty/4973:
#0: ffff88802b7f40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000311b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
1 lock held by syz.2.109/5805:
1 lock held by syz.1.134/5928:
1 lock held by syz.4.268/6693:
5 locks held by syz.3.480/8199:
3 locks held by syz.1.549/8563:
#0: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504
#1: ffffffff8f65c3b0 (devices_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x234/0x530 drivers/infiniband/core/device.c:1185
#2: ffffffff8f65c130 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x2a7/0x530 drivers/infiniband/core/device.c:1190
3 locks held by syz-executor/8628:
#0: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504
#1: ffffffff8f65c3b0 (devices_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x234/0x530 drivers/infiniband/core/device.c:1185
#2: ffffffff8f65c130 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x2a7/0x530 drivers/infiniband/core/device.c:1190
3 locks held by kworker/u8:20/8723:
3 locks held by syz-executor/8739:
#0: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504
#1: ffffffff8f65c3b0 (devices_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x234/0x530 drivers/infiniband/core/device.c:1185
#2: ffffffff8f65c130 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x2a7/0x530 drivers/infiniband/core/device.c:1190
3 locks held by syz-executor/8738:
#0: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504
#1: ffffffff8f65c3b0 (devices_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x234/0x530 drivers/infiniband/core/device.c:1185
#2: ffffffff8f65c130 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x2a7/0x530 drivers/infiniband/core/device.c:1190
3 locks held by syz-executor/8742:
#0: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504
#1: ffffffff8f65c3b0 (devices_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x234/0x530 drivers/infiniband/core/device.c:1185
#2: ffffffff8f65c130 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x2a7/0x530 drivers/infiniband/core/device.c:1190
3 locks held by syz-executor/8744:
#0: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504
#1: ffffffff8f65c3b0 (devices_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x234/0x530 drivers/infiniband/core/device.c:1185
#2: ffffffff8f65c130 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x2a7/0x530 drivers/infiniband/core/device.c:1190
3 locks held by syz-executor/8746:
#0: ffffffff8fa08590 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504
#1: ffffffff8f65c3b0 (devices_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x234/0x530 drivers/infiniband/core/device.c:1185
#2: ffffffff8f65c130 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x2a7/0x530 drivers/infiniband/core/device.c:1190
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-syzkaller-12881-g6342649c33d2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf4e/0x1280 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5805 Comm: syz.2.109 Not tainted 6.10.0-syzkaller-12881-g6342649c33d2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x111/0x1a0 mm/kasan/generic.c:189
Code: 44 89 c2 e8 a1 ea ff ff 83 f0 01 5b 5d 41 5c c3 cc cc cc cc 48 85 d2 74 4f 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 41 80 38 00 <74> f2 eb b2 41 bc 08 00 00 00 45 29 dc 49 8d 14 2c eb 0c 48 83 c0
RSP: 0018:ffffc90003507950 EFLAGS: 00000046
RAX: fffffbfff28c4cfb RBX: fffffbfff28c4cfc RCX: ffffffff81677efe
RDX: fffffbfff28c4cfc RSI: 0000000000000008 RDI: ffffffff946267d8
RBP: fffffbfff28c4cfb R08: 0000000000000000 R09: fffffbfff28c4cfb
R10: ffffffff946267df R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88805fdde508 R14: 0000000000000003 R15: ffff88805fddda00
FS: 00007fa49452b6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffed1b70f88 CR3: 0000000068688000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
hlock_class+0x4e/0x130 kernel/locking/lockdep.c:227
__lock_acquire+0x142f/0x3cb0 kernel/locking/lockdep.c:5138
lock_acquire kernel/locking/lockdep.c:5759 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:105 [inline]
__wake_up+0x1c/0x60 kernel/sched/wait.c:127
io_cqring_wake io_uring/io_uring.h:274 [inline]
io_cqring_wake io_uring/io_uring.h:261 [inline]
io_cq_unlock_post+0xed/0x190 io_uring/io_uring.c:595
__io_cqring_overflow_flush+0x457/0x680 io_uring/io_uring.c:633
io_cqring_do_overflow_flush io_uring/io_uring.c:645 [inline]
io_cqring_wait+0x1111/0x1480 io_uring/io_uring.c:2486
__do_sys_io_uring_enter+0x410/0x1130 io_uring/io_uring.c:3255
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa493777299
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa49452b048 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007fa493905f80 RCX: 00007fa493777299
RDX: 0000000000400000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fa4937e48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa493905f80 R15: 00007fff52055618