rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5007/1:b..l.. P5625/1:b..l.. P2/1:b..l.. P53/1:b..l.. P5637/1:b..l.. P8321/1:b..l.. P5301/1:b..l.. P5639/1:b..l..
rcu: (detected by 0, t=10502 jiffies, g=58205, q=966 ncpus=1)
task:kworker/0:3 state:R running task stack:22208 pid:5639 tgid:5639 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947
Code: ff ff ff e8 d0 55 74 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 d2 4f 46 13 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 77 aa 1f
RSP: 0018:ffffc900040b6ca0 EFLAGS: 00000296
RAX: 0dbba3aebfab6d00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000006e1bc6bd RSI: ffffffff8ea7a0b0 RDI: ffffffff8c8ffc80
RBP: ffff8880279a8000 R08: ffffffff8178a98f R09: 0000000000000000
R10: ffffc900040b6dd8 R11: ffffffff81b3dc10 R12: ffffffff9015a4a0
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1403 [inline]
__free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2957
__slab_free+0x269/0x2c0 mm/slub.c:5926
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x22/0xb0 mm/kasan/common.c:417
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5531 [inline]
__kmalloc_node_track_caller_noprof+0x4af/0x720 mm/slub.c:5662
__kmemdup_nul mm/util.c:64 [inline]
kstrdup+0x42/0x100 mm/util.c:84
__kernfs_new_node+0xa9/0x980 fs/kernfs/dir.c:663
kernfs_new_node fs/kernfs/dir.c:759 [inline]
kernfs_create_dir_ns+0xf7/0x220 fs/kernfs/dir.c:1133
sysfs_create_dir_ns+0x12f/0x2a0 fs/sysfs/dir.c:59
create_dir lib/kobject.c:73 [inline]
kobject_add_internal+0x622/0xcd0 lib/kobject.c:240
kobject_add_varg lib/kobject.c:374 [inline]
kobject_add+0x163/0x240 lib/kobject.c:426
device_add+0x3fa/0xb80 drivers/base/core.c:3699
usb_create_ep_devs+0x12c/0x230 drivers/usb/core/endpoint.c:162
usb_new_device+0xa9d/0x1690 drivers/usb/core/hub.c:2743
hub_port_connect drivers/usb/core/hub.c:5585 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5725 [inline]
port_event drivers/usb/core/hub.c:5889 [inline]
hub_event+0x28e8/0x4d30 drivers/usb/core/hub.c:5971
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:dhcpcd state:R running task stack:24072 pid:5301 tgid:5301 ppid:1 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:unwind_next_frame+0xcd7/0x2550 arch/x86/kernel/unwind_orc.c:619
Code: 00 00 fc ff df 48 8b 44 24 20 42 80 3c 20 00 4d 8d 7e 48 74 08 4c 89 ff e8 36 ad c7 00 49 89 1f 48 8b 44 24 38 42 80 3c 20 00 <49> 8d 5e 38 4c 8b 6c 24 18 74 08 48 89 df e8 16 ad c7 00 48 8b 04
RSP: 0018:ffffc90003467140 EFLAGS: 00000246
RAX: 1ffff9200068ce44 RBX: ffffffff824a9343 RCX: 1ffff9200068ce01
RDX: ffffc90003467468 RSI: 0000000000000002 RDI: ffffc90003467468
RBP: 1ffffffff24d519c R08: ffffc90003467470 R09: 0000000000000000
R10: ffffc90003467238 R11: ffffffff81b3dc10 R12: dffffc0000000000
R13: ffffc90003468000 R14: ffffc900034671e8 R15: ffffc90003467230
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1403 [inline]
__free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2957
__slab_free+0x269/0x2c0 mm/slub.c:5926
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x22/0xb0 mm/kasan/common.c:417
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5531 [inline]
__kmalloc_node_track_caller_noprof+0x4af/0x720 mm/slub.c:5662
kmalloc_reserve net/core/skbuff.c:638 [inline]
__alloc_skb+0x2c1/0x7a0 net/core/skbuff.c:716
alloc_skb include/linux/skbuff.h:1390 [inline]
alloc_skb_with_frags+0xc6/0x760 net/core/skbuff.c:6898
sock_alloc_send_pskb+0xc69/0xd90 net/core/sock.c:3093
unix_dgram_sendmsg+0x4ff/0x17e0 net/unix/af_unix.c:2148
sock_sendmsg_nosec+0x14e/0x190 net/socket.c:800
__sock_sendmsg net/socket.c:818 [inline]
sock_write_iter+0x2de/0x3e0 net/socket.c:1269
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:1036
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f50dc1db407
RSP: 002b:00007ffd51f942c0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f50dc151780 RCX: 00007f50dc1db407
RDX: 0000000000000047 RSI: 00007ffd51f94320 RDI: 0000000000000005
RBP: 00005636bc8b3a48 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd51f94750
R13: 000000000000fde2 R14: 0000000000000001 R15: 0000000000000001
task:syz.5.705 state:R running task stack:25608 pid:8321 tgid:8321 ppid:6994 task_flags:0x40044c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_is_watching+0x69/0xb0 kernel/rcu/tree.c:754
Code: f7 e8 ab ba 92 00 48 c7 c3 98 dd eb 94 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 35 8b 03 65 48 ff 0d 87 f8 3c 13 <74> 11 83 e0 04 c1 e8 02 5b 41 5e 41 5f e9 c5 11 6e 0a cc e8 7f ee
RSP: 0018:ffffc900041b7180 EFLAGS: 00000286
RAX: 0000000000205ee4 RBX: ffff8880b8233d98 RCX: 8000000000000001
RDX: ffffc900041b7201 RSI: ffffffff8c8ffc60 RDI: ffffffff8c8ffc20
RBP: 1ffffffff24d1b01 R08: ffffc900041b7638 R09: 0000000000000000
R10: ffffc900041b7298 R11: fffff52000836e55 R12: ffffc900041b0000
R13: ffffffff8178a98f R14: ffffffff8eac47d0 R15: dffffc0000000000
rcu_read_unlock include/linux/rcupdate.h:878 [inline]
class_rcu_destructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0x1b66/0x2550 arch/x86/kernel/unwind_orc.c:709
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:264 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:296
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2780 [inline]
slab_free mm/slub.c:6630 [inline]
kmem_cache_free+0x182/0x650 mm/slub.c:6757
anon_vma_chain_free mm/rmap.c:147 [inline]
unlink_anon_vmas+0x35d/0x720 mm/rmap.c:516
free_pgtables+0x663/0xb70 mm/memory.c:401
exit_mmap+0x4aa/0xa40 mm/mmap.c:1327
__mmput+0x118/0x420 kernel/fork.c:1192
exit_mm+0x18e/0x240 kernel/exit.c:586
do_exit+0x6a8/0x2360 kernel/exit.c:967
do_group_exit+0x22d/0x2f0 kernel/exit.c:1123
get_signal+0x1216/0x12c0 kernel/signal.c:3112
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff7369a0349
RSP: 002b:00007ffea062cac8 EFLAGS: 00000202 ORIG_RAX: 00000000000001b3
RAX: fffffffffffffffc RBX: 00007ff73695b8e0 RCX: 00007ff7369a0349
RDX: 00007ff73695b8e0 RSI: 0000000000000058 RDI: 00007ffea062cb20
RBP: 00007ff7378f56c0 R08: 00007ff7378f56c0 R09: 00007ffea062cc07
R10: 0000000000000008 R11: 0000000000000202 R12: ffffffffffffffe8
R13: 000000000000006e R14: 00007ffea062cb20 R15: 00007ffea062cc08
task:syz-executor state:R running task stack:22120 pid:5637 tgid:5637 ppid:5633 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:81 [inline]
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:103 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:238 [inline]
RIP: 0010:unwind_next_frame+0x4fb/0x2550 arch/x86/kernel/unwind_orc.c:510
Code: c1 e8 3f 48 01 c8 48 83 e0 fe 49 8d 1c 47 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 48 63 03 <48> 01 d8 48 8d 4b 04 48 39 e8 4c 0f 46 f9 48 8d 43 fc 4c 0f 47 e0
RSP: 0018:ffffc90004087160 EFLAGS: 00000246
RAX: fffffffff05154af RBX: ffffffff91e34108 RCX: dffffc0000000000
RDX: ffffffff91e340f8 RSI: ffffffff9268dee6 RDI: ffffffff8c8ffc20
RBP: ffffffff82349548 R08: 000000000000000a R09: 0000000000000000
R10: ffffc90004087258 R11: ffffffff81b3dc10 R12: ffffffff91e3411c
R13: ffffffff91e340f8 R14: ffffc90004087208 R15: ffffffff91e340f8
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1403 [inline]
__free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2957
__slab_free+0x269/0x2c0 mm/slub.c:5926
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4720 [inline]
slab_alloc_node mm/slub.c:5033 [inline]
__do_kmalloc_node mm/slub.c:5530 [inline]
__kmalloc_noprof+0x302/0x710 mm/slub.c:5556
_kmalloc_noprof include/linux/slab.h:995 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
tomoyo_encode+0x2ad/0x570 security/tomoyo/realpath.c:80
tomoyo_realpath_from_path+0x5fa/0x640 security/tomoyo/realpath.c:283
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x229/0x470 security/tomoyo/file.c:776
security_file_open+0xa9/0x240 security/security.c:2760
do_dentry_open+0x495/0x1360 fs/open.c:977
vfs_open_consume+0x4a/0x350 fs/open.c:1131
do_open fs/namei.c:4845 [inline]
path_openat+0x16fc/0x20f0 fs/namei.c:5010
do_file_open+0x23e/0x4a0 fs/namei.c:5039
do_sys_openat2+0x115/0x200 fs/open.c:1442
do_sys_open fs/open.c:1448 [inline]
__do_sys_openat fs/open.c:1788 [inline]
__se_sys_openat fs/open.c:1783 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1783
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fef5ff9e87c
RSP: 002b:00007fff8c7a2e10 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000000021c RCX: 00007fef5ff9e87c
RDX: 0000000000090800 RSI: 00007fef60036455 RDI: 00000000ffffff9c
RBP: 00007fff8c7a2ebc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000000000c5
R13: 0000000000000000 R14: 000000000003744f R15: 00007fff8c7a2f10
task:kworker/u8:3 state:R running task stack:24576 pid:53 tgid:53 ppid:2 task_flags:0x4208160 flags:0x00080000
Workqueue: krds_cp_wq#0/0 rds_connect_worker
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947
Code: ff ff ff e8 d0 55 74 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 d2 4f 46 13 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 77 aa 1f
RSP: 0018:ffffc90000be7088 EFLAGS: 00000286
RAX: c1a83d749606c100 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000c67dd374 RSI: ffffffff8ea7a0b0 RDI: ffffffff8c8ffc80
RBP: ffff88801cf18000 R08: ffffffff8178a98f R09: 0000000000000000
R10: ffffc90000be71c8 R11: fffff5200017ce45 R12: ffffffff9015a4a0
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
__unwind_start+0x514/0x660 arch/x86/kernel/unwind_orc.c:787
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1403 [inline]
__free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2957
__slab_free+0x269/0x2c0 mm/slub.c:5926
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4720 [inline]
slab_alloc_node mm/slub.c:5033 [inline]
__kmalloc_cache_noprof+0x29a/0x600 mm/slub.c:5676
_kmalloc_noprof include/linux/slab.h:991 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
ref_tracker_alloc+0x221/0x530 lib/ref_tracker.c:270
__netns_tracker_alloc include/net/net_namespace.h:375 [inline]
sk_alloc+0x2c7/0x390 net/core/sock.c:2358
inet_create+0x7a9/0xff0 net/ipv4/af_inet.c:334
__sock_create+0x4b5/0xac0 net/socket.c:1679
rds_tcp_conn_path_connect+0x2d8/0x920 net/rds/tcp_connect.c:-1
rds_connect_worker+0x1d8/0x290 net/rds/threads.c:176
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kthreadd state:R running task stack:26000 pid:2 tgid:2 ppid:0 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_release+0x2e1/0x3c0 kernel/locking/lockdep.c:5968
Code: 64 46 13 00 00 00 00 eb b5 e8 3b 23 74 0a f7 c3 00 02 00 00 74 b9 65 48 8b 05 43 1d 46 13 48 3b 44 24 28 75 48 fb 48 83 c4 30 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 58 7b 1f
RSP: 0018:ffffc90000077308 EFLAGS: 00000282
RAX: 5ce5f7a93d1f0300 RBX: 0000000000000206 RCX: 0000000000000046
RDX: ffffc90000077401 RSI: ffffffff8ea7a0b0 RDI: ffffffff8c8ffc80
RBP: ffff88801f2aca58 R08: ffffc90000077c70 R09: 0000000000000000
R10: ffffc90000077438 R11: fffff5200000ee89 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff9015a4a0 R15: ffff88801f2abe80
rcu_lock_release include/linux/rcupdate.h:319 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
class_rcu_destructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0x1baa/0x2550 arch/x86/kernel/unwind_orc.c:709
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1403 [inline]
__free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2957
__slab_free+0x269/0x2c0 mm/slub.c:5926
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4720 [inline]
slab_alloc_node mm/slub.c:5033 [inline]
__do_kmalloc_node mm/slub.c:5530 [inline]
__kmalloc_noprof+0x302/0x710 mm/slub.c:5556
_kmalloc_noprof include/linux/slab.h:995 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
lsm_blob_alloc security/security.c:219 [inline]
lsm_task_alloc security/security.c:271 [inline]
security_task_alloc+0x4d/0x330 security/security.c:2806
copy_process+0x1c75/0x44b0 kernel/fork.c:2300
kernel_clone+0x2d7/0x940 kernel/fork.c:2784
kernel_thread+0x13f/0x1b0 kernel/fork.c:2845
create_kthread kernel/kthread.c:459 [inline]
kthreadd+0x4ec/0x6e0 kernel/kthread.c:817
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:syz-executor state:R running task stack:20960 pid:5625 tgid:5625 ppid:5624 task_flags:0x400100 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947
Code: ff ff ff e8 d0 55 74 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 d2 4f 46 13 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 77 aa 1f
RSP: 0018:ffffc90003767740 EFLAGS: 00000292
RAX: 540c4c44f57d9600 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000704ab5bb RSI: ffffffff8ea7a0b0 RDI: ffffffff8c8ffc80
RBP: ffff888031e6be80 R08: ffffffff8178a98f R09: 0000000000000000
R10: ffffc90003767878 R11: ffffffff81b3dc10 R12: ffffffff9015a4a0
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1403 [inline]
__free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2957
__slab_free+0x269/0x2c0 mm/slub.c:5926
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x22/0xb0 mm/kasan/common.c:417
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5531 [inline]
__kmalloc_noprof+0x366/0x710 mm/slub.c:5556
_kmalloc_noprof include/linux/slab.h:995 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
alloc_pipe_info+0x1f4/0x4c0 fs/pipe.c:902
get_pipe_inode fs/pipe.c:979 [inline]
create_pipe_files+0x87/0x7a0 fs/pipe.c:1011
__do_pipe_flags+0x46/0x1f0 fs/pipe.c:1073
do_pipe2+0xaa/0x190 fs/pipe.c:1121
__do_sys_pipe2 fs/pipe.c:1139 [inline]
__se_sys_pipe2 fs/pipe.c:1137 [inline]
__x64_sys_pipe2+0x5a/0x70 fs/pipe.c:1137
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcc1cd9e589
RSP: 002b:00007ffc3f9ca1e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000125
RAX: ffffffffffffffda RBX: 0000555568ef8710 RCX: 00007fcc1cd9e589
RDX: 0000000000000006 RSI: 0000000000000000 RDI: 00007ffc3f9ca1f8
RBP: 00007ffc3f9ca7d0 R08: 0000000000079ee0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc3f9ca610
R13: 0000555568efa880 R14: 0000555568efc2d0 R15: 00007ffc3f9ca350
task:udevd state:R running task stack:23400 pid:5007 tgid:5007 ppid:1 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__rcu_read_unlock+0x0/0xe0 kernel/rcu/tree_plugin.h:429
Code: d9 80 e1 07 80 c1 03 38 c1 7c dc 48 89 df e8 67 0c 92 00 eb d2 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 41 57 41 56 41 55 41 54 53 49 bf 00 00 00 00 00 fc ff
RSP: 0018:ffffc900030c7638 EFLAGS: 00000282
RAX: be98978302900100 RBX: ffffc900030c76f8 RCX: 0000000000000046
RDX: ffffc900030c7701 RSI: ffffffff8ea7a0b0 RDI: ffffffff8c8ffc80
RBP: 1ffffffff24bf701 R08: ffffc900030c7810 R09: 0000000000000000
R10: ffffc900030c7738 R11: fffff52000618ee9 R12: ffffc900030c0000
R13: ffffffff8178a98f R14: ffffc900030c76e8 R15: ffffc900030c7820
rcu_read_unlock include/linux/rcupdate.h:882 [inline]
class_rcu_destructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0x1baf/0x2550 arch/x86/kernel/unwind_orc.c:709
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1403 [inline]
__free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2957
__slab_free+0x269/0x2c0 mm/slub.c:5926
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4720 [inline]
slab_alloc_node mm/slub.c:5033 [inline]
kmem_cache_alloc_noprof+0x2b4/0x600 mm/slub.c:5047
alloc_filename fs/namei.c:147 [inline]
do_getname+0x2e/0x250 fs/namei.c:187
getname include/linux/fs.h:2564 [inline]
getname_maybe_null include/linux/fs.h:2571 [inline]
class_filename_maybe_null_constructor include/linux/fs.h:2595 [inline]
vfs_fstatat+0x45/0x170 fs/stat.c:372
__do_sys_newfstatat fs/stat.c:542 [inline]
__se_sys_newfstatat+0x118/0x3a0 fs/stat.c:536
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f63ac911b0a
RSP: 002b:00007fff5b81eb48 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000561284443430 RCX: 00007f63ac911b0a
RDX: 00007fff5b81eb50 RSI: 0000561284431ee9 RDI: 00000000ffffff9c
RBP: 0000561294360198 R08: 00063478c1c69200 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff5b81eb50 R14: 0000000000000000 R15: 00063478c1c69200
rcu: rcu_preempt kthread starved for 9587 jiffies! g58205 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:28104 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x1230 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x9c/0x340 kernel/rcu/tree.c:2330
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 3232 Comm: kworker/R-bat_e Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:find_stack lib/stackdepot.c:609 [inline]
RIP: 0010:stack_depot_save_flags+0x159/0x810 lib/stackdepot.c:676
Code: 31 c5 c1 c0 18 29 c5 48 8b 05 e3 0d f2 16 8b 0d d5 0d f2 16 21 e9 48 c1 e1 04 4c 8d 24 08 65 48 ff 05 cb 0f b4 0f 4c 8b 3c 08 <4d> 39 e7 74 0a 44 88 6c 24 08 45 89 d5 eb 34 45 31 ff e9 87 00 00
RSP: 0018:ffffc90000007098 EFLAGS: 00000282
RAX: ffff88823ae00000 RBX: 0000000000000000 RCX: 00000000005a4470
RDX: 00000000ee91948a RSI: 0000000000000001 RDI: 0000000088a40cff
RBP: 00000000e145a447 R08: 000000006d259241 R09: 00000000cdb1aa7d
R10: 0000000000000019 R11: ffffffff81b3dc10 R12: ffff88823b3a4470
R13: 0000000000000000 R14: ffffc900000070f0 R15: ffff88816b20d940
FS: 0000000000000000(0000) GS:ffff888123376000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555912a84e8 CR3: 0000000074790000 CR4: 00000000003526f0
Call Trace:
kasan_save_stack mm/kasan/common.c:58 [inline]
kasan_save_track+0x4f/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:264 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:296
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2780 [inline]
slab_free mm/slub.c:6630 [inline]
kfree+0x1c5/0x650 mm/slub.c:6923
skb_release_all net/core/skbuff.c:1188 [inline]
__kfree_skb+0x5d/0x210 net/core/skbuff.c:1202
nft_synproxy_eval_v6+0x36a/0x4e0 net/netfilter/nft_synproxy.c:-1
nft_synproxy_do_eval+0x3ff/0x5d0 net/netfilter/nft_synproxy.c:146
expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
nft_do_chain+0x48d/0x1b10 net/netfilter/nf_tables_core.c:285
nft_do_chain_inet+0x360/0x4b0 net/netfilter/nft_chain_filter.c:162
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:633
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:323
ip6_input+0x16a/0x270 net/ipv6/ip6_input.c:545
NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:325
__netif_receive_skb_one_core net/core/dev.c:6414 [inline]
__netif_receive_skb net/core/dev.c:6527 [inline]
process_backlog+0x795/0x18b0 net/core/dev.c:6878
__napi_poll+0xaa/0x330 net/core/dev.c:7947
napi_poll net/core/dev.c:8010 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:8167
handle_softirqs+0x265/0x8d0 kernel/softirq.c:669
do_softirq+0x77/0xd0 kernel/softirq.c:569
__local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473
spin_unlock_bh include/linux/spinlock.h:407 [inline]
batadv_tt_global_purge net/batman-adv/translation-table.c:2880 [inline]
batadv_tt_purge+0x4ee/0xa40 net/batman-adv/translation-table.c:4270
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
rescuer_thread+0x84a/0x12a0 kernel/workqueue.c:3803
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245