rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10474 ticks this GP) idle=d2c4/1/0x4000000000000000 softirq=15303/15304 fqs=104
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1964665          0            0
rcu: 	cputime:    41527       7990           13   ==> 49550(ms)
rcu: 	(t=10504 jiffies g=15593 q=2511 ncpus=2)
CPU: 1 PID: 6551 Comm: syz.3.219 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:99 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x4cf/0x2970 arch/x86/kernel/unwind_orc.c:494
Code: 75 3e 4d 63 2f 4d 01 fd 4c 89 ef 4c 89 f6 e8 98 e7 4b 00 49 8d 47 04 4d 39 f5 4c 0f 46 e0 49 8d 47 fc 48 0f 47 d8 49 0f 46 ef <49> 39 dc 77 28 e8 67 e5 4b 00 48 ba 00 00 00 00 00 fc ff df eb 97
RSP: 0018:ffffc900001f05b8 EFLAGS: 00000297
RAX: ffffffff8e9dad08 RBX: ffffffff8e9dad0c RCX: ffff88801f2e0000
RDX: 0000000000000100 RSI: ffffffff8175c1f9 RDI: ffffffff8175c158
RBP: ffffffff8e9dad0c R08: ffffc900001f0750 R09: 0000000000000013
R10: 0000000000000004 R11: 0000000000000100 R12: ffffffff8e9dad10
R13: ffffffff8175c158 R14: ffffffff8175c1f9 R15: ffffffff8e9dad0c
FS:  00007fd3e57f66c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d81fff8 CR3: 000000002e335000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:46
 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492
 __call_rcu_common kernel/rcu/tree.c:2721 [inline]
 call_rcu+0x153/0x950 kernel/rcu/tree.c:2837
 inet_frag_destroy+0x1f4/0x290 net/ipv4/inet_fragment.c:309
 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
 </IRQ>
 <TASK>
 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 51 f6 cd f6 e8 7c 03 ff f6 fb bf 01 00 00 00 <e8> f1 b4 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc90003397620 EFLAGS: 00000282
RAX: d09505cb3de62c00 RBX: 0000000000000000 RCX: d09505cb3de62c00
RDX: dffffc0000000000 RSI: ffffffff8acac9e0 RDI: 0000000000000001
RBP: ffffc900033976d0 R08: ffffffff8e8b15ef R09: 1ffffffff1d162bd
R10: dffffc0000000000 R11: fffffbfff1d162be R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000672ec4
 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:preempt_schedule+0x0/0xd0 kernel/sched/core.c:6884
Code: 4c 89 f7 e8 52 cc 50 f7 eb af 66 0f 1f 00 bf 01 00 00 00 e8 52 fb cd f6 e8 fd fd ff ff bf 01 00 00 00 e8 a3 f9 cd f6 c3 66 90 <f3> 0f 1e fa 55 48 89 e5 41 56 53 48 83 e4 e0 48 83 ec 60 65 48 8b
RSP: 0018:ffffc90003397798 EFLAGS: 00000287
RAX: ffffffff813b57ca RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000d7cc000 RSI: 0000000000007c8d RDI: 0000000000007c8e
RBP: ffffc900033977e8 R08: ffff88801f2e0000 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000002 R12: ffffc900033978c8
R13: dffffc0000000000 R14: ffffc90003397eb0 R15: ffffc900033978d8
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 unwind_next_frame+0x200f/0x2970 arch/x86/kernel/unwind_orc.c:672
 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
 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_slab_alloc+0x6c/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook+0x6e/0x4b0 mm/slab.h:767
 slab_alloc_node mm/slub.c:3495 [inline]
 slab_alloc mm/slub.c:3503 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3510 [inline]
 kmem_cache_alloc_lru+0x111/0x2d0 mm/slub.c:3526
 __d_alloc+0x31/0x730 fs/dcache.c:1773
 d_alloc_pseudo+0x1d/0x70 fs/dcache.c:1905
 alloc_file_pseudo+0xe4/0x210 fs/file_table.c:329
 sock_alloc_file+0xb7/0x280 net/socket.c:469
 sock_map_fd net/socket.c:494 [inline]
 __sys_socket+0x13d/0x1a0 net/socket.c:1723
 __do_sys_socket net/socket.c:1728 [inline]
 __se_sys_socket net/socket.c:1726 [inline]
 __x64_sys_socket+0x7a/0x90 net/socket.c:1726
 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: 0033:0x7fd3e759c819
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:00007fd3e57f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007fd3e7815fa0 RCX: 00007fd3e759c819
RDX: 0000000000000300 RSI: 0200000000000002 RDI: 0000000000000011
RBP: 00007fd3e7632c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd3e7816038 R14: 00007fd3e7815fa0 R15: 00007ffcf2d32518
 </TASK>