rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=ac74/1/0x4000000000000000 softirq=107044/107044 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P24002/1:b..l P24506/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=126185, q=118 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 26131 Comm: syz.1.5722 Not tainted 6.14.0-rc2-syzkaller-00039-g09fbf3d50205 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4857 [inline]
RIP: 0010:__lock_acquire+0x6bc/0x2100 kernel/locking/lockdep.c:5178
Code: 04 ee 48 89 44 24 38 40 84 ed 4c 8b 6c 24 40 0f 84 7e 04 00 00 0f b6 1b 41 0f b6 04 16 84 c0 0f 85 64 12 00 00 41 f6 47 01 80 <0f> 85 63 04 00 00 4c 89 64 24 48 84 db 40 0f b6 c5 0f b6 cb 0f 44
RSP: 0018:ffffc90000a188f0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff819ab527
RDX: dffffc0000000000 RSI: ffff888030770af0 RDI: ffffffff942c6840
RBP: 0000000000000002 R08: ffffffff942c6847 R09: 1ffffffff2858d08
R10: dffffc0000000000 R11: fffffbfff2858d09 R12: ffff888030770ad4
R13: ffff888030770000 R14: 1ffff110060ee167 R15: ffff888030770b38
FS: 00007f838c9f66c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000027860000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
debug_object_activate+0x17f/0x580 lib/debugobjects.c:818
debug_hrtimer_activate kernel/time/hrtimer.c:455 [inline]
debug_activate kernel/time/hrtimer.c:496 [inline]
enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1100
__run_hrtimer kernel/time/hrtimer.c:1818 [inline]
__hrtimer_run_queues+0x6cb/0xd30 kernel/time/hrtimer.c:1865
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5251
Code: c9 50 e8 49 0a 0c 00 48 83 c4 08 4c 89 f7 e8 fd 39 00 00 e9 de 04 00 00 4c 89 f7 e8 90 2d 62 0a e8 8b 75 38 00 fb 48 8b 5d c0 <48> 8d bb 08 16 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc9000334f588 EFLAGS: 00000282
RAX: b71eb0e02fb8e400 RBX: ffff888030770000 RCX: ffffffff9a3cd903
RDX: dffffc0000000000 RSI: ffffffff8c0aa680 RDI: ffffffff8c5fb900
RBP: ffffc9000334f5d0 R08: ffffffff901a3677 R09: 1ffffffff20346ce
R10: dffffc0000000000 R11: fffffbfff20346cf R12: 1ffff110170e7ebe
R13: dffffc0000000000 R14: ffff8880b863e7c0 R15: ffff8880b873f5f0
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x18c4/0x4c40 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
schedule_timeout+0xb0/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
rdmsr_safe_on_cpu+0x16c/0x310 arch/x86/lib/msr-smp.c:181
msr_read+0x15d/0x260 arch/x86/kernel/msr.c:66
vfs_read+0x1f8/0xb40 fs/read_write.c:563
ksys_read+0x18f/0x2b0 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f838eb8cde9
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:00007f838c9f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f838eda5fa0 RCX: 00007f838eb8cde9
RDX: 0000000000018ff8 RSI: 0000400000019680 RDI: 0000000000000005
RBP: 00007f838ec0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f838eda5fa0 R15: 00007fff313127a8
task:kworker/u8:13 state:R running task stack:21136 pid:24506 tgid:24506 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7086
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5855
Code: 2b 00 74 08 4c 89 f7 e8 1a b6 88 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc900041078e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000820f28 RCX: ffff88801eba8ae8
RDX: dffffc0000000000 RSI: ffffffff8c0ab8e0 RDI: ffffffff8c5fb900
RBP: ffffc90004107a30 R08: ffffffff942c6847 R09: 1ffffffff2858d08
R10: dffffc0000000000 R11: fffffbfff2858d09 R12: 1ffff92000820f24
R13: dffffc0000000000 R14: ffffc90004107940 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
batadv_nc_process_nc_paths+0xd6/0x3a0 net/batman-adv/network-coding.c:687
batadv_nc_worker+0x42a/0x610 net/batman-adv/network-coding.c:728
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
task:syz-executor state:R running task stack:19888 pid:24002 tgid:24002 ppid:23983 task_flags:0x400140 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7086
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5855
Code: 2b 00 74 08 4c 89 f7 e8 1a b6 88 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90005137640 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000a26ed4 RCX: ffff88806b5c64e8
RDX: dffffc0000000000 RSI: ffffffff8c0ab8e0 RDI: ffffffff8c5fb900
RBP: ffffc90005137790 R08: ffffffff942c6847 R09: 1ffffffff2858d08
R10: dffffc0000000000 R11: fffffbfff2858d09 R12: 1ffff92000a26ed0
R13: dffffc0000000000 R14: ffffc900051376a0 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
is_bpf_text_address+0x46/0x2a0 kernel/bpf/core.c:772
kernel_text_address+0xa7/0xe0 kernel/extable.c:125
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xfd/0x150 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4115 [inline]
slab_alloc_node mm/slub.c:4164 [inline]
kmem_cache_alloc_lru_noprof+0x1dd/0x390 mm/slub.c:4183
__d_alloc+0x31/0x670 fs/dcache.c:1664
d_alloc_pseudo+0x1f/0xb0 fs/dcache.c:1795
alloc_path_pseudo fs/file_table.c:359 [inline]
alloc_file_pseudo+0x141/0x320 fs/file_table.c:375
sock_alloc_file+0xb7/0x2e0 net/socket.c:470
sock_map_fd net/socket.c:500 [inline]
__sys_socket+0x1dd/0x3c0 net/socket.c:1699
__do_sys_socket net/socket.c:1704 [inline]
__se_sys_socket net/socket.c:1702 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1702
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd62838ed07
RSP: 002b:00007ffc421c1498 EFLAGS: 00000206 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007fd6285762e0 RCX: 00007fd62838ed07
RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 00007ffc421c1bbc R08: 0000000000000000 R09: 00007ffc421c18c7
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000067
R13: 00000000000927c0 R14: 0000000000000000 R15: 00007ffc421c1c10
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g126185 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=129949
rcu: rcu_preempt kthread starved for 10502 jiffies! g126185 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:25784 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244