rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-....: (0 ticks this GP) idle=6a7/1/0x4000000000000002 softirq=8506/8507 fqs=5248
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4502
(detected by 1, t=10502 jiffies, g=10453, q=4597)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4502 Comm: syz-executor.1 Not tainted 5.15.182-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:55 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x54/0x290 mm/kasan/generic.c:189
Code: 0f 82 43 02 00 00 49 bf 01 00 00 00 00 fc ff df 49 89 fb 49 c1 eb 03 49 b8 00 00 00 00 00 fc ff df 4f 8d 0c 03 48 8d 5c 37 ff <48> c1 eb 03 4e 8d 14 3b 4d 89 d6 4d 29 ce 49 83 fe 10 7f 26 4d 85
RSP: 0018:ffffc900032cf460 EFLAGS: 00000802
RAX: 0000000000000001 RBX: ffffffff8d68abaf RCX: ffffffff815be23b
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d68aba8
RBP: ffffc900032cf598 R08: dffffc0000000000 R09: fffffbfff1ad1575
R10: ffffed100c8a738b R11: 1ffffffff1ad1575 R12: ffffffff8c11bea0
R13: 1ffff92000659e9c R14: 0000000000000000 R15: dffffc0000000001
FS: 0000555573684480(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557368d938 CR3: 0000000022c14000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
cpumask_test_cpu include/linux/cpumask.h:344 [inline]
cpu_online include/linux/cpumask.h:895 [inline]
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0xbb/0x3f0 kernel/locking/lockdep.c:5594
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:312
rcu_read_lock include/linux/rcupdate.h:739 [inline]
__perf_event_output kernel/events/core.c:7776 [inline]
perf_event_output_forward+0x9e/0x280 kernel/events/core.c:7798
__perf_event_overflow+0x364/0x530 kernel/events/core.c:9491
perf_tp_event+0x32c/0xb50 kernel/events/core.c:10023
perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:9997
perf_trace_preemptirq_template+0x2be/0x380 include/trace/events/preemptirq.h:14
trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x84/0x480 kernel/rcu/tree_plugin.h:671
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 8d 2a 9e 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900032cfc20 EFLAGS: 00000206
RAX: 40a6c6626faaf700 RBX: 1ffff92000659f88 RCX: 40a6c6626faaf700
RDX: dffffc0000000000 RSI: ffffffff8a0b0fc0 RDI: ffffffff8a59a2c0
RBP: ffffc900032cfcf8 R08: dffffc0000000000 R09: fffffbfff1ff341a
R10: fffffbfff1ff341a R11: 1ffffffff1ff3419 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000246 R15: ffffffff8c1203e0
__rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
rcu_read_unlock+0x85/0x90 include/linux/rcupdate.h:771
dput+0xc0/0x1a0 fs/dcache.c:886
path_umount+0x342/0xfb0 fs/namespace.c:1763
ksys_umount fs/namespace.c:1783 [inline]
__do_sys_umount fs/namespace.c:1788 [inline]
__se_sys_umount fs/namespace.c:1786 [inline]
__x64_sys_umount+0x125/0x160 fs/namespace.c:1786
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f30360e1e17
Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffea623aaf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f30360e1e17
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffea623abb0
RBP: 00007ffea623abb0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffea623bc70
R13: 00007f303612b3b9 R14: 0000000000017a4b R15: 0000000000000003
task:syz-executor.1 state:R running task stack:21280 pid: 4502 ppid: 4493 flags:0x0000400a
Call Trace: