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WARNING: CPU: 1 PID: 75 at kernel/rcu/tree_stall.h:1015 rcu_check_gp_start_stall.part.0+0x1c4/0x4b0 kernel/rcu/tree_stall.h:1015
Modules linked in:
CPU: 1 UID: 0 PID: 75 Comm: kworker/u32:4 Not tainted 6.16.0-rc7-syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:rcu_check_gp_start_stall.part.0+0x1c4/0x4b0 kernel/rcu/tree_stall.h:1015
Code: 88 61 01 00 00 be 04 00 00 00 48 c7 c7 80 8f df 9a e8 e0 5f 7f 00 b8 01 00 00 00 87 05 35 ab 3d 19 85 c0 0f 85 3d 01 00 00 90 <0f> 0b 90 48 c7 c3 44 72 a9 90 48 81 fd 80 fc 5c 8e 74 5a 48 b8 00
RSP: 0018:ffffc900006a0df0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000002904 RCX: ffffffff81a1e440
RDX: fffffbfff35bf1f0 RSI: 0000000000000004 RDI: ffffffff9adf8f80
RBP: ffffffff8e5cfc80 R08: 0000000000000001 R09: fffffbfff35bf1f0
R10: 0000000000000003 R11: 0000000000000001 R12: 1ffffffff1c42240
R13: 0000000000000246 R14: ffffffff8e5cfc80 R15: ffff88806a53b2d2
FS: 0000000000000000(0000) GS:ffff8880d6820000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f63159f8286 CR3: 000000000e382000 CR4: 0000000000352ef0
Call Trace:
rcu_check_gp_start_stall kernel/rcu/tree_stall.h:978 [inline]
rcu_core+0x4cf/0x14e0 kernel/rcu/tree.c:2827
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0xd7f/0x1510 kernel/smp.c:885
Code: 00 45 85 ed 74 46 48 8b 14 24 49 89 d6 49 89 d5 49 c1 ee 03 41 83 e5 07 4d 01 e6 41 83 c5 03 e8 c7 14 0c 00 f3 90 41 0f b6 06 <41> 38 c5 7c 08 84 c0 0f 85 6f 05 00 00 8b 43 08 31 ff 83 e0 01 89
RSP: 0018:ffffc9000165f8a0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff88806a442080 RCX: ffffffff81afd3cd
RDX: ffff888021df2440 RSI: ffffffff81afd3a9 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000003 R14: ffffed100d488411 R15: ffff88806a53b580
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1052
on_each_cpu include/linux/smp.h:71 [inline]
smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2691 [inline]
smp_text_poke_batch_finish+0x27b/0xdb0 arch/x86/kernel/alternative.c:2901
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x376/0x550 kernel/jump_label.c:919
static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate mm/kfence/core.c:850 [inline]
toggle_allocation_gate+0xfa/0x280 mm/kfence/core.c:842
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
----------------
Code disassembly (best guess):
0: 00 45 85 add %al,-0x7b(%rbp)
3: ed in (%dx),%eax
4: 74 46 je 0x4c
6: 48 8b 14 24 mov (%rsp),%rdx
a: 49 89 d6 mov %rdx,%r14
d: 49 89 d5 mov %rdx,%r13
10: 49 c1 ee 03 shr $0x3,%r14
14: 41 83 e5 07 and $0x7,%r13d
18: 4d 01 e6 add %r12,%r14
1b: 41 83 c5 03 add $0x3,%r13d
1f: e8 c7 14 0c 00 call 0xc14eb
24: f3 90 pause
26: 41 0f b6 06 movzbl (%r14),%eax
* 2a: 41 38 c5 cmp %al,%r13b <-- trapping instruction
2d: 7c 08 jl 0x37
2f: 84 c0 test %al,%al
31: 0f 85 6f 05 00 00 jne 0x5a6
37: 8b 43 08 mov 0x8(%rbx),%eax
3a: 31 ff xor %edi,%edi
3c: 83 e0 01 and $0x1,%eax
3f: 89 .byte 0x89