INFO: task kworker/u4:3:56 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:3 state:D stack:24504 pid: 56 ppid: 2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
unregister_shrinker mm/vmscan.c:678 [inline]
unregister_shrinker+0x77/0x2f0 mm/vmscan.c:673
nfsd_reply_cache_shutdown+0x33/0x2d0 fs/nfsd/nfscache.c:216
nfsd_exit_net+0x10e/0x4b0 fs/nfsd/nfsctl.c:1506
ops_exit_list+0xb0/0x160 net/core/net_namespace.c:168
cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:593
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/0:3:1844 blocked for more than 144 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:3 state:D stack:26640 pid: 1844 ppid: 2 flags:0x00004000
Workqueue: events free_ipc
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
unregister_shrinker mm/vmscan.c:678 [inline]
unregister_shrinker+0x77/0x2f0 mm/vmscan.c:673
deactivate_locked_super+0x6c/0x160 fs/super.c:334
deactivate_super+0xad/0xd0 fs/super.c:366
cleanup_mnt+0x3a2/0x540 fs/namespace.c:1137
mntput_no_expire+0x908/0xcd0 fs/namespace.c:1223
mntput fs/namespace.c:1233 [inline]
kern_unmount fs/namespace.c:4369 [inline]
kern_unmount+0xb5/0xe0 fs/namespace.c:4363
free_ipc_ns ipc/namespace.c:123 [inline]
free_ipc+0xf0/0x200 ipc/namespace.c:141
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz-executor.0:32378 blocked for more than 146 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27256 pid:32378 ppid: 6529 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
unregister_shrinker mm/vmscan.c:678 [inline]
unregister_shrinker+0x77/0x2f0 mm/vmscan.c:673
nfsd_reply_cache_shutdown+0x33/0x2d0 fs/nfsd/nfscache.c:216
nfsd_exit_net+0x10e/0x4b0 fs/nfsd/nfsctl.c:1506
ops_exit_list+0xb0/0x160 net/core/net_namespace.c:168
setup_net+0x639/0xa30 net/core/net_namespace.c:349
copy_net_ns+0x318/0x760 net/core/net_namespace.c:470
create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226
ksys_unshare+0x445/0x920 kernel/fork.c:3074
__do_sys_unshare kernel/fork.c:3145 [inline]
__se_sys_unshare kernel/fork.c:3143 [inline]
__x64_sys_unshare+0x2d/0x40 kernel/fork.c:3143
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: 0033:0x7f459e6fdae9
RSP: 002b:00007f459bc73188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f459e810f60 RCX: 00007f459e6fdae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006c060000
RBP: 00007f459e757f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc781c9dff R14: 00007f459bc73300 R15: 0000000000022000
INFO: task syz-executor.0:32394 blocked for more than 148 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27256 pid:32394 ppid: 6529 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
unregister_shrinker mm/vmscan.c:678 [inline]
unregister_shrinker+0x77/0x2f0 mm/vmscan.c:673
nfsd_reply_cache_shutdown+0x33/0x2d0 fs/nfsd/nfscache.c:216
nfsd_exit_net+0x10e/0x4b0 fs/nfsd/nfsctl.c:1506
ops_exit_list+0xb0/0x160 net/core/net_namespace.c:168
setup_net+0x639/0xa30 net/core/net_namespace.c:349
copy_net_ns+0x318/0x760 net/core/net_namespace.c:470
create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226
ksys_unshare+0x445/0x920 kernel/fork.c:3074
__do_sys_unshare kernel/fork.c:3145 [inline]
__se_sys_unshare kernel/fork.c:3143 [inline]
__x64_sys_unshare+0x2d/0x40 kernel/fork.c:3143
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: 0033:0x7f459e6fdae9
RSP: 002b:00007f459bc10188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f459e8111a0 RCX: 00007f459e6fdae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007f459e757f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc781c9dff R14: 00007f459bc10300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b983a20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
3 locks held by khugepaged/33:
4 locks held by kworker/u4:3/56:
#0: ffff888011a33138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888011a33138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888011a33138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff888011a33138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff888011a33138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff888011a33138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc90001a2fdb0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffffffff8d0f4790 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb00 net/core/net_namespace.c:555
#3: ffffffff8ba6da90 (shrinker_rwsem){++++}-{3:3}, at: unregister_shrinker mm/vmscan.c:678 [inline]
#3: ffffffff8ba6da90 (shrinker_rwsem){++++}-{3:3}, at: unregister_shrinker+0x77/0x2f0 mm/vmscan.c:673
4 locks held by kworker/0:3/1844:
#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+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc90005defdb0 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffff888032d3a0e0 (&type->s_umount_key#40){+.+.}-{3:3}, at: deactivate_super+0xa5/0xd0 fs/super.c:365
#3: ffffffff8ba6da90 (shrinker_rwsem){++++}-{3:3}, at: unregister_shrinker mm/vmscan.c:678 [inline]
#3: ffffffff8ba6da90 (shrinker_rwsem){++++}-{3:3}, at: unregister_shrinker+0x77/0x2f0 mm/vmscan.c:673
1 lock held by in:imklog/6221:
2 locks held by systemd-udevd/11816:
2 locks held by syz-executor.0/32378:
#0: ffffffff8d0f4790 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f5/0x760 net/core/net_namespace.c:466
#1: ffffffff8ba6da90 (shrinker_rwsem){++++}-{3:3}, at: unregister_shrinker mm/vmscan.c:678 [inline]
#1: ffffffff8ba6da90 (shrinker_rwsem){++++}-{3:3}, at: unregister_shrinker+0x77/0x2f0 mm/vmscan.c:673
2 locks held by syz-executor.0/32394:
#0: ffffffff8d0f4790 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f5/0x760 net/core/net_namespace.c:466
#1: ffffffff8ba6da90 (shrinker_rwsem){++++}-{3:3}, at: unregister_shrinker mm/vmscan.c:678 [inline]
#1: ffffffff8ba6da90 (shrinker_rwsem){++++}-{3:3}, at: unregister_shrinker+0x77/0x2f0 mm/vmscan.c:673
1 lock held by grep/6787:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__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:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 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
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10 Comm: kworker/u4:1 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:55 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x34/0x180 mm/kasan/generic.c:189
Code: 89 f9 41 54 44 0f b6 c2 49 01 f1 55 53 0f 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86 05 01 00 00 49 83 e9 01 <48> 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 ca 48 c1 ed 03 49 c1
RSP: 0018:ffffc90000cf7900 EFLAGS: 00000286
RAX: ffff7fffffffffff RBX: 1ffff9200019ef26 RCX: ffffffff815ce288
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d70dad0
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8d70dad7
R10: ffffffff819bd310 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8b84d568 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc979f5ff8 CR3: 000000000b68e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
cpumask_test_cpu include/linux/cpumask.h:344 [inline]
cpu_online include/linux/cpumask.h:895 [inline]
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0xb8/0x510 kernel/locking/lockdep.c:5608
__mutex_lock_common kernel/locking/mutex.c:607 [inline]
__mutex_lock+0x12f/0x12f0 kernel/locking/mutex.c:740
arch_jump_label_transform_queue+0x58/0x100 arch/x86/kernel/jump_label.c:136
__jump_label_update+0x12e/0x400 kernel/jump_label.c:451
jump_label_update+0x1d5/0x430 kernel/jump_label.c:830
static_key_disable_cpuslocked+0x152/0x1b0 kernel/jump_label.c:207
static_key_disable+0x16/0x20 kernel/jump_label.c:215
toggle_allocation_gate mm/kfence/core.c:746 [inline]
toggle_allocation_gate+0x183/0x390 mm/kfence/core.c:724
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 89 f9 mov %edi,%ecx
2: 41 54 push %r12
4: 44 0f b6 c2 movzbl %dl,%r8d
8: 49 01 f1 add %rsi,%r9
b: 55 push %rbp
c: 53 push %rbx
d: 0f 82 18 01 00 00 jb 0x12b
13: 48 b8 ff ff ff ff ff movabs $0xffff7fffffffffff,%rax
1a: 7f ff ff
1d: 48 39 c7 cmp %rax,%rdi
20: 0f 86 05 01 00 00 jbe 0x12b
26: 49 83 e9 01 sub $0x1,%r9
* 2a: 48 89 fd mov %rdi,%rbp <-- trapping instruction
2d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
34: fc ff df
37: 4d 89 ca mov %r9,%r10
3a: 48 c1 ed 03 shr $0x3,%rbp
3e: 49 rex.WB
3f: c1 .byte 0xc1