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WARNING: CPU: 1 PID: 10841 at kernel/rcu/tree_stall.h:1001 rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:993
Modules linked in:
CPU: 1 PID: 10841 Comm: syz.0.1256 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:1001
Code: ff ff ff 48 c7 c7 a0 e4 ee 96 be 04 00 00 00 e8 4a a9 6c 00 48 89 df b8 01 00 00 00 87 05 0c b6 7e 15 85 c0 0f 85 19 ff ff ff <0f> 0b 48 81 ff 80 54 d3 8c 74 47 48 c7 c0 dc c5 4a 8e 48 c1 e8 03
RSP: 0018:ffffc900001f0bb8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff8cd35480 RCX: ffffffff81702e86
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8cd35480
RBP: ffffc900001f0e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff2dddc94 R12: 0000000000002904
R13: 1ffff110171e7a6a R14: 0000000000000a02 R15: dffffc0000000000
FS: 000055556b3e7500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c403e78 CR3: 0000000023aab000 CR4: 00000000003506e0
Call Trace:
rcu_core+0x612/0x1720 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+0xc7/0x190 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:__asan_memset+0x0/0x40 mm/kasan/shadow.c:83
Code: 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 89 f6 48 8b 0c 24 ba 01 00 00 00 e9 bc ea ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 1e fa 55 41 56 53 48 89 d3 89 f5 49 89 fe 48 8b 4c 24 18 48
RSP: 0018:ffffc90013bbfd98 EFLAGS: 00000246
RAX: ffffffff812dd4cf RBX: 1ffff92002777fb8 RCX: ffff88802313bc00
RDX: 0000000000000058 RSI: 0000000000000000 RDI: ffffc90013bbfde0
RBP: ffffc90013bbfec0 R08: ffffffff8e4a912f R09: 1ffffffff1c95225
R10: dffffc0000000000 R11: fffffbfff1c95226 R12: ffffc90013bbff58
R13: dffffc0000000000 R14: ffffc90013bbfde0 R15: ffff88802313bc00
arch_do_signal_or_restart+0x8e/0x780 arch/x86/kernel/signal.c:308
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fefd178ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe8601a708 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 00007fefd19c6098 RCX: 00007fefd178ebe9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fefd19c6098
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000188601a9ff
R10: 00007fefd19c5fa0 R11: 0000000000000246 R12: 00007fefd19c609c
R13: 00007fefd19c6090 R14: 0000000000001c38 R15: 0000000000000003
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
9: f3 0f 1e fa endbr64
d: 89 f6 mov %esi,%esi
f: 48 8b 0c 24 mov (%rsp),%rcx
13: ba 01 00 00 00 mov $0x1,%edx
18: e9 bc ea ff ff jmp 0xffffead9
1d: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
24: 00 00 00
27: 66 90 xchg %ax,%ax
* 29: f3 0f 1e fa endbr64 <-- trapping instruction
2d: 55 push %rbp
2e: 41 56 push %r14
30: 53 push %rbx
31: 48 89 d3 mov %rdx,%rbx
34: 89 f5 mov %esi,%ebp
36: 49 89 fe mov %rdi,%r14
39: 48 8b 4c 24 18 mov 0x18(%rsp),%rcx
3e: 48 rex.W