rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8490/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=77541, q=321 ncpus=2)
task:syz.1.557 state:R running task stack:26544 pid:8490 tgid:8478 ppid:7382 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:89 [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+0x105/0x1a0 mm/kasan/generic.c:189
Code: 75 0a 45 3a 11 b8 01 00 00 00 7c 0b 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
RSP: 0018:ffffc9000ddcef38 EFLAGS: 00000246
RAX: fffff52001bb9e06 RBX: fffff52001bb9e07 RCX: ffffffff813d12e6
RDX: fffff52001bb9e07 RSI: 0000000000000060 RDI: ffffc9000ddcefd8
RBP: fffff52001bb9dfb R08: 0000000000000001 R09: fffff52001bb9e06
R10: ffffc9000ddcf037 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc9000ddcf000 R15: ffff888060cc8000
__asan_memset+0x23/0x50 mm/kasan/shadow.c:84
__unwind_start+0x36/0x880 arch/x86/kernel/unwind_orc.c:688
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xb2/0x170 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1101 [inline]
free_unref_folios+0x9e9/0x1390 mm/page_alloc.c:2667
folios_put_refs+0x560/0x760 mm/swap.c:1039
folio_batch_release include/linux/pagevec.h:101 [inline]
shmem_undo_range+0x5a1/0x1160 mm/shmem.c:1023
shmem_truncate_range mm/shmem.c:1132 [inline]
shmem_evict_inode+0x3a3/0xba0 mm/shmem.c:1260
evict+0x398/0x8c0 fs/inode.c:704
iput_final fs/inode.c:1838 [inline]
iput.part.0+0x5a8/0x7f0 fs/inode.c:1864
iput+0x5c/0x80 fs/inode.c:1854
dentry_unlink_inode+0x29c/0x480 fs/dcache.c:412
__dentry_kill+0x1d0/0x600 fs/dcache.c:615
dput.part.0+0x4b1/0x9b0 fs/dcache.c:857
dput+0x1f/0x30 fs/dcache.c:847
__fput+0x54e/0xbb0 fs/file_table.c:430
task_work_run+0x14e/0x250 kernel/task_work.c:228
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xaa3/0x2bb0 kernel/exit.c:882
do_group_exit+0xd3/0x2a0 kernel/exit.c:1031
get_signal+0x25fb/0x2770 kernel/signal.c:2917
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fafbf17cef9
RSP: 002b:00007fafbfec3038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 0000000000010106 RBX: 00007fafbf336058 RCX: 00007fafbf17cef9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fafbf1ef046 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fafbf336058 R15: 00007ffc062b5858
rcu: rcu_preempt kthread starved for 9356 jiffies! g77541 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:27680 pid:17 tgid:17 ppid:2 flags:0x00004000
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_timeout+0x136/0x2a0 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2034
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2236
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
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8515 Comm: syz.0.565 Not tainted 6.11.0-rc6-syzkaller-00326-gd1f2d51b711a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__sanitizer_cov_trace_cmp4+0x8/0x20 kernel/kcov.c:287
Code: bf 02 00 00 00 e9 18 ff ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 0c 24 <89> f2 89 fe bf 04 00 00 00 e9 ea fe ff ff 66 2e 0f 1f 84 00 00 00
RSP: 0018:ffffc9000df4f800 EFLAGS: 00000006
RAX: 00000000000a4001 RBX: ffffc9000df4f888 RCX: ffffffff813cf13d
RDX: 0000000000040000 RSI: 00000000000a4000 RDI: 000000000000757e
RBP: 0000000000000001 R08: 0000000000000006 R09: ffffffff81757e11
R10: ffffffff8b400000 R11: 0000000000000000 R12: ffffffff81757e11
R13: 000000000000757e R14: 00000000000a4000 R15: ffffc9000df4f8bd
FS: 00007fa790e406c0(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f707fb91f40 CR3: 0000000059c48000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
orc_find arch/x86/kernel/unwind_orc.c:211 [inline]
unwind_next_frame+0x23d/0x23a0 arch/x86/kernel/unwind_orc.c:494
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3992 [inline]
slab_alloc_node mm/slub.c:4041 [inline]
kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4048
__sigqueue_alloc+0x244/0x6b0 kernel/signal.c:428
__send_signal_locked+0x74b/0x11c0 kernel/signal.c:1119
do_send_sig_info kernel/signal.c:1301 [inline]
group_send_sig_info+0x2aa/0x300 kernel/signal.c:1451
bpf_send_signal_common+0x2e8/0x3a0 kernel/trace/bpf_trace.c:881
____bpf_send_signal kernel/trace/bpf_trace.c:886 [inline]
bpf_send_signal+0x19/0x30 kernel/trace/bpf_trace.c:884
bpf_prog_7ba5217f62dcd359+0x40/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
__bpf_prog_run include/linux/filter.h:691 [inline]
bpf_prog_run include/linux/filter.h:698 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2406 [inline]
bpf_trace_run2+0x231/0x590 kernel/trace/bpf_trace.c:2447
trace_sys_enter include/trace/events/syscalls.h:18 [inline]
syscall_trace_enter+0x1b2/0x240 kernel/entry/common.c:61
syscall_enter_from_user_mode_work include/linux/entry-common.h:168 [inline]
syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline]
do_syscall_64+0x1ee/0x250 arch/x86/entry/common.c:79
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa78ff18859
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007fa790e3fb40 EFLAGS: 00000246 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007fa790135f88 RCX: 00007fa78ff18859
RDX: 00007fa790e3fb40 RSI: 00007fa790e3fc70 RDI: 0000000000000011
RBP: 00007fa790135f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa790135f8c
R13: 0000000000000000 R14: 00007fff9f44baa0 R15: 00007fff9f44bb88