rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6070/1:b..l P1036/1:b..l P5840/1:b..l P5499/1:b..l P5855/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=12761, q=906682 ncpus=2)
task:syz-executor state:R running task stack:21080 pid:5855 tgid:5855 ppid:5834 task_flags:0x400140 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7109
irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:32 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:109 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:127 [inline]
RIP: 0010:lock_release+0xaa/0x3e0 kernel/locking/lockdep.c:5888
Code: 92 41 83 bf ec 0a 00 00 00 0f 85 1e 02 00 00 49 81 3e 00 43 60 93 0f 84 11 02 00 00 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 <48> 8b 5c 24 20 fa 48 c7 c7 59 68 99 8d e8 24 58 c8 09 65 ff 05 0d
RSP: 0018:ffffc900042bf5c0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 8b97c40b141e4a00
RDX: 0000000000000000 RSI: ffffffff8be1ba20 RDI: ffffffff8be1b9e0
RBP: ffff88801ce3a4f4 R08: ffff88801ce3a4b7 R09: 1ffff110039c7496
R10: dffffc0000000000 R11: ffffed10039c7497 R12: 000000000004f20d
R13: ffffffff82295c1e R14: ffffffff8e13f0e0 R15: ffff88807a358000
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
__update_page_owner_free_handle+0x452/0x470 mm/page_owner.c:283
__reset_page_owner+0x85/0x1f0 mm/page_owner.c:309
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0xc65/0xe60 mm/page_alloc.c:2706
discard_slab mm/slub.c:2717 [inline]
__put_partials+0x161/0x1c0 mm/slub.c:3186
put_cpu_partial+0x17c/0x250 mm/slub.c:3261
__slab_free+0x2f7/0x400 mm/slub.c:4513
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204
alloc_empty_file+0x55/0x1d0 fs/file_table.c:234
path_openat+0x107/0x3830 fs/namei.c:4041
do_filp_open+0x1fa/0x410 fs/namei.c:4082
do_sys_openat2+0x121/0x1c0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3cc378e4e1
RSP: 002b:00007ffdcc240a50 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f3cc3811c05 RCX: 00007f3cc378e4e1
RDX: 0000000000090800 RSI: 00007ffdcc241c00 RDI: 00000000ffffff9c
RBP: 00007ffdcc241bec R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffdcc241c00
R13: 00007f3cc3811c05 R14: 000000000001be3e R15: 00007ffdcc241c40
task:dhcpcd state:R running task stack:21384 pid:5499 tgid:5499 ppid:5498 task_flags:0x400140 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7109
irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:842 [inline]
RIP: 0010:class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
RIP: 0010:unwind_next_frame+0xcb/0x2390 arch/x86/kernel/unwind_orc.c:479
Code: 00 00 00 00 48 c7 c7 e0 f0 13 8e 31 f6 31 d2 b9 02 00 00 00 45 31 c0 45 31 c9 41 57 e8 3e 8e 2b 00 48 83 c4 08 e8 d5 e4 f3 09 <85> c0 74 3a e8 7c 7f 34 00 84 c0 75 31 e8 c3 e4 f3 09 85 c0 74 28
RSP: 0018:ffffc90003857698 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffffff821fdad2 RCX: ffff88802f555a00
RDX: 0000000000000000 RSI: ffffffff8db6fcc6 RDI: ffffffff8be1ba40
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff8172aae5
R10: ffffc900038577b8 R11: ffffffff81acfd40 R12: 1ffff9200070aeed
R13: ffffc900038577a0 R14: ffffc90003857768 R15: ffffffff8172aae5
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
save_stack+0xf7/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:308
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0xc65/0xe60 mm/page_alloc.c:2706
discard_slab mm/slub.c:2717 [inline]
__put_partials+0x161/0x1c0 mm/slub.c:3186
put_cpu_partial+0x17c/0x250 mm/slub.c:3261
__slab_free+0x2f7/0x400 mm/slub.c:4513
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204
sk_prot_alloc+0x57/0x220 net/core/sock.c:2241
sk_alloc+0x3a/0x370 net/core/sock.c:2303
unix_create1+0xb0/0x7c0 net/unix/af_unix.c:-1
unix_create+0x154/0x200 net/unix/af_unix.c:1138
__sock_create+0x4b0/0x9f0 net/socket.c:1541
sock_create net/socket.c:1599 [inline]
__sys_socketpair+0x1c5/0x560 net/socket.c:1746
__do_sys_socketpair net/socket.c:1799 [inline]
__se_sys_socketpair net/socket.c:1796 [inline]
__x64_sys_socketpair+0x9b/0xb0 net/socket.c:1796
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8b095ed73a
RSP: 002b:00007ffef83b25b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00005602c81e8150 RCX: 00007f8b095ed73a
RDX: 0000000000000000 RSI: 0000000000080805 RDI: 0000000000000001
RBP: 00007ffef83d29e0 R08: 0000000000000000 R09: 0000000000000001
R10: 00007ffef83b25d0 R11: 0000000000000246 R12: 00007ffef83b25d0
R13: 0000000000000001 R14: 0000000000000000 R15: 00005602c3589ac0
task:syz-executor state:R running task stack:21480 pid:5840 tgid:5840 ppid:1 task_flags:0x40054c flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6966
preempt_schedule+0xae/0xc0 kernel/sched/core.c:6990
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_read_unlock include/linux/rwlock_api_smp.h:233 [inline]
_raw_read_unlock+0x3f/0x50 kernel/locking/spinlock.c:260
zap_pid_ns_processes+0x2c4/0x5f0 kernel/pid_namespace.c:232
find_child_reaper kernel/exit.c:622 [inline]
forget_original_parent kernel/exit.c:711 [inline]
exit_notify kernel/exit.c:748 [inline]
do_exit+0x1ed2/0x22e0 kernel/exit.c:976
do_group_exit+0x21c/0x2d0 kernel/exit.c:1105
get_signal+0x125e/0x1310 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:111
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f79af185453
RSP: 002b:00007fffa8a50ef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: 0000000000000011 RBX: 0000000000000000 RCX: 00007f79af185453
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055558bf2a7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000001c832 R15: 00007fffa8a51090
task:kworker/u8:5 state:R running task stack:23720 pid:1036 tgid:1036 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7109
irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_cmp4+0x83/0x90 kernel/kcov.c:289
Code: 8d 52 28 4d 39 ca 77 22 89 ff 89 f6 49 ff c0 4c 89 01 48 c7 44 11 08 04 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 18 3b a9 09 cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003b6f620 EFLAGS: 00000293
RAX: ffffffff8ae8c9cb RBX: 000000000000003c RCX: 0000000000000000
RDX: ffff888026aada00 RSI: 000000000000003c RDI: 0000000000000078
RBP: 0000000000000078 R08: 0000000000000000 R09: 000000000000000c
R10: 000000000000000c R11: 0000000000000000 R12: 1ffff1100ad5b61a
R13: ffff888054e2a001 R14: 0000000000000004 R15: ffff888056adb0d0
ieee80211_sta_get_rates+0x31b/0x5d0 net/mac80211/util.c:1550
ieee80211_update_sta_info net/mac80211/ibss.c:982 [inline]
ieee80211_rx_bss_info net/mac80211/ibss.c:1092 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1573 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1303/0x2ae0 net/mac80211/ibss.c:1600
ieee80211_iface_process_skb net/mac80211/iface.c:1670 [inline]
ieee80211_iface_work+0x806/0xfe0 net/mac80211/iface.c:1724
cfg80211_wiphy_work+0x2dc/0x460 net/wireless/core.c:435
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:modprobe state:R running task stack:24104 pid:6070 tgid:6070 ppid:49 task_flags:0x400000 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7109
irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:deref_stack_reg+0x1bd/0x230 arch/x86/kernel/unwind_orc.c:406
Code: 30 4c 89 c7 49 89 f7 e8 11 08 00 00 49 89 c6 48 8b 5c 24 18 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 e3 3b ad 00 <4c> 89 33 b0 01 eb 02 31 c0 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc90004e16fc0 EFLAGS: 00000246
RAX: 1ffff920009c2e25 RBX: ffffc90004e17128 RCX: 0000000000000001
RDX: ffffc90004e17128 RSI: dffffc0000000000 RDI: ffffc90004e17660
RBP: 1ffff920009c2e1d R08: ffffc90004e17660 R09: 0000000000000000
R10: ffffc90004e17138 R11: fffff520009c2e29 R12: 1ffff920009c2e1e
R13: 1ffff920009c2e1f R14: 0000000000000000 R15: dffffc0000000000
unwind_next_frame+0x17c4/0x2390 arch/x86/kernel/unwind_orc.c:-1
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
save_stack+0xf7/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:308
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0xc65/0xe60 mm/page_alloc.c:2706
discard_slab mm/slub.c:2717 [inline]
__put_partials+0x161/0x1c0 mm/slub.c:3186
put_cpu_partial+0x17c/0x250 mm/slub.c:3261
__slab_free+0x2f7/0x400 mm/slub.c:4513
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
kmem_cache_alloc_bulk_noprof+0x4e0/0x790 mm/slub.c:5374
mt_alloc_bulk lib/maple_tree.c:181 [inline]
mas_alloc_nodes+0x447/0x8e0 lib/maple_tree.c:1271
mas_node_count_gfp lib/maple_tree.c:1331 [inline]
mas_preallocate+0x3ad/0x6f0 lib/maple_tree.c:5534
vma_iter_prealloc mm/vma.h:463 [inline]
__split_vma+0x2fa/0xa00 mm/vma.c:525
split_vma mm/vma.c:595 [inline]
vma_modify+0x13b3/0x1970 mm/vma.c:1626
vma_modify_flags+0x1e8/0x230 mm/vma.c:1644
mprotect_fixup+0x400/0x9b0 mm/mprotect.c:658
do_mprotect_pkey+0x8cd/0xce0 mm/mprotect.c:832
__do_sys_mprotect mm/mprotect.c:853 [inline]
__se_sys_mprotect mm/mprotect.c:850 [inline]
__x64_sys_mprotect+0x80/0x90 mm/mprotect.c:850
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f28142a72c7
RSP: 002b:00007ffc4aba9f28 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007f28142bada0 RCX: 00007f28142a72c7
RDX: 0000000000000001 RSI: 0000000000002000 RDI: 00007f28142b8000
RBP: 00007ffc4abaa1f0 R08: 000000003de00ec7 R09: 0000000000000000
R10: 00007f2813febc58 R11: 0000000000000206 R12: fffffffffffffff8
R13: 0000004bff2d7919 R14: 0000000000000000 R15: 00007f28142bb310
rcu: rcu_preempt kthread starved for 10000 jiffies! g12761 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:26888 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.16.0-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: 53 de 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d d3 ad 21 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c2
RAX: e7f5c7f16b63aa00 RBX: ffffffff81976918 RCX: e7f5c7f16b63aa00
RDX: 0000000000000001 RSI: ffffffff8d982fba RDI: ffffffff8be1ba40
RBP: ffffc90000197f20 R08: ffff8880b8732f5b R09: 1ffff110170e65eb
R10: dffffc0000000000 R11: ffffed10170e65ec R12: ffffffff8fa0b3f0
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003a57b40
FS: 0000000000000000(0000) GS:ffff888125d57000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005602c35744b0 CR3: 0000000073d98000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:749
default_idle_call+0x74/0xb0 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x1e8/0x510 kernel/sched/idle.c:325
cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:423
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x147