rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (9772 ticks this GP) idle=a69c/1/0x4000000000000000 softirq=36610/36722 fqs=5246
rcu: hardirqs softirqs csw/system
rcu: number: 1364202 283 0
rcu: cputime: 15984 36504 68 ==> 52500(ms)
rcu: (t=10501 jiffies g=46769 q=1678 ncpus=2)
CPU: 1 PID: 11638 Comm: syz.3.1685 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:rcu_read_unlock_special+0x83/0x470 kernel/rcu/tree_plugin.h:698
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 1e 0d 92 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900001f0400 EFLAGS: 00000206
RAX: 92b918ca7d84a000 RBX: 1ffff9200003e084 RCX: 92b918ca7d84a000
RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: ffffffff8b1c81e0
RBP: ffffc900001f04c8 R08: ffffffff911bf597 R09: 1ffffffff2237eb2
R10: dffffc0000000000 R11: fffffbfff2237eb3 R12: ffffffff8d137200
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS: 00007f1dc38bf6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007d491000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__rcu_read_unlock+0x7c/0xd0 kernel/rcu/tree_plugin.h:426
rcu_read_unlock include/linux/rcupdate.h:818 [inline]
is_bpf_text_address+0x27e/0x2a0 kernel/bpf/core.c:743
kernel_text_address+0xa0/0xd0 kernel/extable.c:125
__kernel_text_address+0xd/0x30 kernel/extable.c:79
unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0x11d/0x190 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
kmem_cache_free+0xf8/0x270 mm/slub.c:3852
skb_kfree_head net/core/skbuff.c:947 [inline]
skb_free_head net/core/skbuff.c:961 [inline]
skb_release_data+0x60a/0x800 net/core/skbuff.c:991
skb_release_all net/core/skbuff.c:1057 [inline]
__kfree_skb+0x57/0x70 net/core/skbuff.c:1071
tcp_write_queue_purge+0x143/0x2f0 net/ipv4/tcp.c:3003
tcp_done_with_error+0x43/0xc0 net/ipv4/tcp_input.c:4446
tcp_write_err net/ipv4/tcp_timer.c:72 [inline]
tcp_probe_timer net/ipv4/tcp_timer.c:407 [inline]
tcp_write_timer_handler+0x672/0x920 net/ipv4/tcp_timer.c:696
tcp_write_timer+0x12a/0x280 net/ipv4/tcp_timer.c:709
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x542/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 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:preempt_schedule_irq+0xba/0x150 kernel/sched/core.c:7010
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 6f bf 01 00 00 00 e8 61 db cf f6 e8 7c e1 00 f7 fb bf 01 00 00 00 f1 b4 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc900183bf9c0 EFLAGS: 00000282
RAX: 92b918ca7d84a000 RBX: 0000000000000000 RCX: 92b918ca7d84a000
RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: 0000000000000001
RBP: ffffc900183bfa60 R08: ffffffff911bf5ff R09: 1ffffffff2237ebf
R10: dffffc0000000000 R11: fffffbfff2237ec0 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92003077f38
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
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:89 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:107 [inline]
RIP: 0010:lock_release+0x13c/0x8c0 kernel/locking/lockdep.c:5770
Code: 00 00 83 3b 00 0f 85 6e 04 00 00 4c 89 74 24 10 43 c6 44 2f 08 00 48 c7 84 24 a0 00 00 00 00 00 00 00 9c 8f 84 24 a0 00 00 00 <48> 8b 84 24 a0 00 00 00 48 89 44 24 50 43 c6 44 2f 08 f8 fa 48 c7
RSP: 0018:ffffc900183bfb20 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888023ece4dc RCX: 92b918ca7d84a000
RDX: 0000000000000000 RSI: ffffffff8b1c81c0 RDI: ffffffff8b1c8180
RBP: ffffc900183bfc30 R08: ffffffff8e8addaf R09: 1ffffffff1d15bb5
R10: dffffc0000000000 R11: fffffbfff1d15bb6 R12: ffffffff81af15a8
R13: dffffc0000000000 R14: ffff888023ecda00 R15: 1ffff92003077f70
__mutex_unlock_slowpath+0xcc/0x6c0 kernel/locking/mutex.c:907
__do_sys_perf_event_open kernel/events/core.c:12918 [inline]
__se_sys_perf_event_open+0x1848/0x1c50 kernel/events/core.c:12567
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1dc299bf79
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1dc38bf028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f1dc2c15fa0 RCX: 00007f1dc299bf79
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f1dc2a327e0 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1dc2c16038 R14: 00007f1dc2c15fa0 R15: 00007ffe7d4120a8