rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=a8b4/1/0x4000000000000000 softirq=169592/169594 fqs=4278
rcu: hardirqs softirqs csw/system
rcu: number: 1360150 0 0
rcu: cputime: 18377 34112 64 ==> 52490(ms)
rcu: (t=10500 jiffies g=202665 q=2589 ncpus=2)
CPU: 0 PID: 5228 Comm: syz.4.8916 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:unwind_next_frame+0x1ce6/0x2990 arch/x86/kernel/unwind_orc.c:665
Code: 00 49 8b 07 4c 39 f3 0f 96 c1 4c 39 f0 0f 97 c2 84 d1 74 3c 49 8d 4e 08 48 39 d9 0f 96 c2 48 39 c1 0f 97 c0 4d 39 e6 0f 97 c3 <08> c3 08 d3 4c 89 f7 4c 89 e6 e8 eb df 4b 00 80 fb 01 0f 85 5b 01
RSP: 0018:ffffc90000007418 EFLAGS: 00000212
RAX: ffffc90000008000 RBX: ffffc90000000001 RCX: ffffc900000075e8
RDX: ffff8880681bbc00 RSI: 0000000000000002 RDI: ffffc90000007550
RBP: 0000000000000002 R08: ffff8880681bbc00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc90000007548
R13: ffffc90000007548 R14: ffffc900000075e0 R15: ffffc90000007558
FS: 00007f396f73b6c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000051f8f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000240
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__unwind_start+0x5bb/0x730 arch/x86/kernel/unwind_orc.c:760
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xf8/0x190 arch/x86/kernel/stacktrace.c:24
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+0x28/0x40 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1833 [inline]
slab_free_freelist_hook+0x154/0x240 mm/slub.c:1859
slab_free mm/slub.c:3853 [inline]
__kmem_cache_free+0xba/0x1f0 mm/slub.c:3866
skb_kfree_head net/core/skbuff.c:946 [inline]
skb_free_head net/core/skbuff.c:958 [inline]
skb_release_data+0x609/0x7f0 net/core/skbuff.c:988
skb_release_all net/core/skbuff.c:1054 [inline]
__kfree_skb net/core/skbuff.c:1068 [inline]
kfree_skb_reason+0x10e/0x170 net/core/skbuff.c:1104
inet_frag_rbtree_purge net/ipv4/inet_fragment.c:322 [inline]
inet_frag_destroy+0x179/0x290 net/ipv4/inet_fragment.c:359
inet_frag_putn include/net/inet_frag.h:139 [inline]
ip_expire+0x55b/0x850 net/ipv4/ip_fragment.c:192
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x570/0x810 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x27d/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:generic_exec_single+0x477/0x4e0 kernel/smp.c:418
Code: 75 11 e8 2c 15 0b 00 48 85 db 75 16 e8 22 15 0b 00 eb 15 e8 1b 15 0b 00 e8 f6 18 1b 09 48 85 db 74 ea e8 0c 15 0b 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 04 2c 00 00 00 00 43 c7 44 2c 08
RSP: 0018:ffffc9000e4d7a00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc9000d62c000 RSI: 0000000000001bf2 RDI: 0000000000001bf3
RBP: ffffc9000e4d7ad0 R08: ffffffff92223607 R09: 1ffffffff24446c0
R10: dffffc0000000000 R11: fffffbfff24446c1 R12: 1ffff92001c9af44
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92001c9af65
smp_call_function_single+0x36d/0x5a0 kernel/smp.c:647
task_function_call kernel/events/core.c:120 [inline]
perf_install_in_context+0x5bb/0x920 kernel/events/core.c:2959
__do_sys_perf_event_open kernel/events/core.c:12952 [inline]
__se_sys_perf_event_open+0x180d/0x1d40 kernel/events/core.c:12594
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f396e79fb19
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:00007f396f73b028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f396ea25fa0 RCX: 00007f396e79fb19
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000700
RBP: 00007f396e837b70 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f396ea26038 R14: 00007f396ea25fa0 R15: 00007ffe513520c8