rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-....: (1 GPs behind) idle=b60c/1/0x4000000000000000 softirq=23318/23319 fqs=5250
rcu: hardirqs softirqs csw/system
rcu: number: 17625984 0 0
rcu: cputime: 6424 46093 0 ==> 52500(ms)
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7854
rcu: (detected by 1, t=10502 jiffies, g=22245, q=384 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7854 Comm: syz.0.543 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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:178 [inline]
RIP: 0010:kasan_check_range+0x63/0x290 mm/kasan/generic.c:187
Code: 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 49 ff c8 4d 89 c1 49 c1 e9 03 48 bb 01 00 00 00 00 fc ff df <4d> 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41
RSP: 0018:ffffc90000007228 EFLAGS: 00000807
RAX: 0000000000000001 RBX: dffffc0000000001 RCX: ffffffff81671230
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90da3500
RBP: ffffc900000074a8 R08: ffffffff90da3507 R09: 1ffffffff21b46a0
R10: dffffc0000000000 R11: fffffbfff21b46a0 R12: 0000000000000002
R13: ffff88802231bc00 R14: ffff88802231c730 R15: 1ffffffff21b46a0
FS: 00007f17a49206c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 00000000652b3000 CR4: 00000000003506f0
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
__lock_acquire+0xda0/0x7c80 kernel/locking/lockdep.c:5107
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
rcu_read_lock include/linux/rcupdate.h:786 [inline]
__perf_output_begin kernel/events/ring_buffer.c:163 [inline]
perf_output_begin_forward+0xc0/0xa20 kernel/events/ring_buffer.c:273
__perf_event_output kernel/events/core.c:7974 [inline]
perf_event_output_forward+0x22b/0x3a0 kernel/events/core.c:7992
__perf_event_overflow+0x447/0x630 kernel/events/core.c:9717
perf_swevent_overflow kernel/events/core.c:9793 [inline]
perf_swevent_event+0x2f5/0x5c0 kernel/events/core.c:-1
perf_tp_event+0x4f9/0x13a0 kernel/events/core.c:10343
perf_trace_run_bpf_submit+0xf4/0x1c0 kernel/events/core.c:10267
perf_trace_preemptirq_template+0x281/0x340 include/trace/events/preemptirq.h:14
trace_irq_enable+0xbf/0xe0 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x18/0x40 kernel/trace/trace_preemptirq.c:56
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:723
RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:319 [inline]
RIP: 0010:handle_softirqs+0x1b0/0x820 kernel/softirq.c:566
Code: 89 64 24 2c 0f b7 db 48 c7 c7 a0 b2 a9 8a e8 57 c8 1b 09 65 66 c7 05 fd 23 b2 7e 00 00 e8 c8 58 3a 00 fb 49 c7 c6 c0 a0 a0 8c <89> 5c 24 34 b8 ff ff ff ff 0f bc 44 24 34 41 89 c5 41 ff c5 0f 84
RSP: 0018:ffffc90000007e40 EFLAGS: 00000286
RAX: 2fcb2bdd3ec72f00 RBX: 0000000000000200 RCX: 2fcb2bdd3ec72f00
RDX: dffffc0000000000 RSI: ffffffff8aaab9a0 RDI: ffffffff8afc6640
RBP: ffffc90000007f50 R08: ffffffff8e4a87ef R09: 1ffffffff1c950fd
R10: dffffc0000000000 R11: fffffbfff1c950fe R12: 000000000000000a
R13: 0000000000000000 R14: ffffffff8ca0a0c0 R15: ffff88802231bc00
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__rcu_read_unlock+0x77/0xd0 kernel/rcu/tree_plugin.h:426
Code: 84 c0 75 5f 41 83 3e 00 75 20 43 0f b6 04 3c 84 c0 75 3a 8b 03 3d 00 00 00 40 73 0a 5b 41 5c 41 5d 41 5e 41 5f c3 0f 0b eb f2 54 00 00 00 eb d9 89 d9 80 e1 07 80 c1 03 38 c1 7c ac 49 89 fe
RSP: 0018:ffffc9000bbe7e00 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff88802231c03c RCX: ffff88802231bc00
RDX: 0000000000000000 RSI: ffffffff8afc6620 RDI: ffff88802231bc00
RBP: ffff8880760c0058 R08: dffffc0000000000 R09: 1ffffffff21b46a0
R10: dffffc0000000000 R11: fffffbfff21b46a1 R12: 1ffff11004463807
R13: ffffffff81f3a488 R14: ffff88802231c040 R15: dffffc0000000000
rcu_read_unlock include/linux/rcupdate.h:818 [inline]
__fget_files+0x43b/0x4d0 fs/file.c:895
__fget fs/file.c:902 [inline]
__fget_light fs/file.c:1002 [inline]
__fdget+0x173/0x210 fs/file.c:1010
fdget include/linux/file.h:64 [inline]
__do_sys_ioctl fs/ioctl.c:859 [inline]
__se_sys_ioctl+0x20/0x170 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f17a3b8ebe9
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:00007f17a4920038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f17a3db5fa0 RCX: 00007f17a3b8ebe9
RDX: 0000000000000000 RSI: 0000000000008b1a RDI: ffffffffffffffff
RBP: 00007f17a3c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f17a3db6038 R14: 00007f17a3db5fa0 R15: 00007fff881c7d78
task:syz.0.543 state:R running task stack:27176 pid:7854 ppid:6440 flags:0x00004008
Call Trace: