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WARNING: CPU: 0 PID: 12972 at kernel/rcu/tree_stall.h:1001 rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:993
Modules linked in:
CPU: 0 PID: 12972 Comm: syz.3.1576 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:1001
Code: ff ff ff 48 c7 c7 a0 54 31 97 be 04 00 00 00 e8 aa ea 6d 00 48 89 df b8 01 00 00 00 87 05 1c d2 bf 15 85 c0 0f 85 19 ff ff ff <0f> 0b 48 81 ff 80 73 13 8d 74 47 48 c7 c0 dc 84 8b 8e 48 c1 e8 03
RSP: 0018:ffffc90000007bb8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff8d137380 RCX: ffffffff81718276
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8d137380
RBP: ffffc90000007e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff2e62a94 R12: 0000000000002904
R13: ffffffff8d137380 R14: 0000000000000a02 R15: dffffc0000000000
FS:  00007faabc9f66c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 00000000799e2000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 rcu_core+0x635/0x1770 kernel/rcu/tree.c:2462
 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:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x60 kernel/kcov.c:215
Code: 00 00 f3 0f 1e fa 53 48 89 fb e8 13 00 00 00 48 8b 3d 6c 26 04 0d 48 89 de 5b e9 f3 6f 57 00 cc cc cc f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d c0 89 7c 7e 65 8b 15 c1 89 7c 7e 81 e2 00 01 ff 00 74
RSP: 0018:ffffc90003737ba8 EFLAGS: 00000246
RAX: ffffffff83e332f2 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc9000d48b000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90003737d70 R08: ffffffff8e8b502f R09: 1ffffffff1d16a05
R10: dffffc0000000000 R11: fffffbfff1d16a06 R12: ffffffff8ca7e9f8
R13: dffffc0000000000 R14: ffff888078794780 R15: ffffffff8ca7e9e0
 security_file_lock+0x72/0x90 security/security.c:2772
 do_lock_file_wait fs/locks.c:2306 [inline]
 fcntl_setlk+0x8e1/0x1060 fs/locks.c:2389
 do_fcntl+0x88e/0x1490 fs/fcntl.c:357
 __do_sys_fcntl fs/fcntl.c:448 [inline]
 __se_sys_fcntl+0xc9/0x1a0 fs/fcntl.c:433
 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: 0033:0x7faabe79ce59
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:00007faabc9f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000048
RAX: ffffffffffffffda RBX: 00007faabea15fa0 RCX: 00007faabe79ce59
RDX: 0000200000000280 RSI: 0000000000000026 RDI: 0000000000000003
RBP: 00007faabe832d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faabea16038 R14: 00007faabea15fa0 R15: 00007ffff01ffec8
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	f3 0f 1e fa          	endbr64
   6:	53                   	push   %rbx
   7:	48 89 fb             	mov    %rdi,%rbx
   a:	e8 13 00 00 00       	call   0x22
   f:	48 8b 3d 6c 26 04 0d 	mov    0xd04266c(%rip),%rdi        # 0xd042682
  16:	48 89 de             	mov    %rbx,%rsi
  19:	5b                   	pop    %rbx
  1a:	e9 f3 6f 57 00       	jmp    0x577012
  1f:	cc                   	int3
  20:	cc                   	int3
  21:	cc                   	int3
  22:	f3 0f 1e fa          	endbr64
  26:	48 8b 04 24          	mov    (%rsp),%rax
* 2a:	65 48 8b 0d c0 89 7c 	mov    %gs:0x7e7c89c0(%rip),%rcx        # 0x7e7c89f2 <-- trapping instruction
  31:	7e
  32:	65 8b 15 c1 89 7c 7e 	mov    %gs:0x7e7c89c1(%rip),%edx        # 0x7e7c89fa
  39:	81 e2 00 01 ff 00    	and    $0xff0100,%edx
  3f:	74                   	.byte 0x74