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WARNING: CPU: 1 PID: 16554 at kernel/rcu/tree_stall.h:970 rcu_check_gp_start_stall+0x2c8/0x450 kernel/rcu/tree_stall.h:955
Modules linked in:
CPU: 1 PID: 16554 Comm: syz.7.2962 Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:rcu_check_gp_start_stall+0x2c8/0x450 kernel/rcu/tree_stall.h:970
Code: c7 c7 40 7f 40 97 be 04 00 00 00 e8 52 d9 6d 00 b8 01 00 00 00 87 05 b7 4a cc 15 85 c0 0f 85 1c ff ff ff 48 c7 c0 80 36 33 8d <0f> 0b 49 39 c7 74 47 48 c7 c0 34 f3 a0 8e 48 c1 e8 03 42 0f b6 04
RSP: 0018:ffffc900001e0b98 EFLAGS: 00010046
RAX: ffffffff8d333680 RBX: 000000010001f5f0 RCX: ffffffff8174347e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff97407f40
RBP: ffffc900001e0df0 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8880b8f3b852 R14: 0000000000000246 R15: ffffffff8d333680
FS: 0000555556985500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c41101d CR3: 0000000056531000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_core+0x699/0x1820 kernel/rcu/tree.c:2552
handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:661
irq_exit_rcu+0x5/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__syscall_enter_from_user_work kernel/entry/common.c:97 [inline]
RIP: 0010:syscall_enter_from_user_mode+0x37/0x230 kernel/entry/common.c:118
Code: 49 89 fe 48 8b 7c 24 30 e8 f6 fa ff ff 0f 1f 44 00 00 0f 1f 44 00 00 e8 d7 b1 df f6 e8 52 b0 df f6 fb 65 4c 8b 3d 69 b4 50 75 <49> 8b 5f 08 f6 c3 3f 0f 84 ad 00 00 00 f6 c3 20 74 17 4c 89 f7 e8
RSP: 0018:ffffc900056d7ef8 EFLAGS: 00000282
RAX: 67629ba57b12d600 RBX: ffffc900056d7f30 RCX: ffffffff973c3103
RDX: dffffc0000000000 RSI: ffffffff8b0c1ec0 RDI: ffffffff8b5f7360
RBP: ffffc900056d7f48 R08: dffffc0000000000 R09: fffffbfff1d417ce
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 000000000000000f R14: ffffc900056d7f58 R15: ffff888025a13b80
do_syscall_64+0x1e/0xb0 arch/x86/entry/common.c:77
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f284cb29359
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007ffc672b0800 EFLAGS: 00000206 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007f284c9ff6c0 RCX: 00007f284cb29359
RDX: 00007ffc672b0800 RSI: 00007ffc672b0930 RDI: 0000000000000011
RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000021000 R11: 0000000000000206 R12: 00007ffc672b0ee0
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 49 89 fe mov %rdi,%r14
3: 48 8b 7c 24 30 mov 0x30(%rsp),%rdi
8: e8 f6 fa ff ff call 0xfffffb03
d: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
12: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
17: e8 d7 b1 df f6 call 0xf6dfb1f3
1c: e8 52 b0 df f6 call 0xf6dfb073
21: fb sti
22: 65 4c 8b 3d 69 b4 50 mov %gs:0x7550b469(%rip),%r15 # 0x7550b493
29: 75
* 2a: 49 8b 5f 08 mov 0x8(%r15),%rbx <-- trapping instruction
2e: f6 c3 3f test $0x3f,%bl
31: 0f 84 ad 00 00 00 je 0xe4
37: f6 c3 20 test $0x20,%bl
3a: 74 17 je 0x53
3c: 4c 89 f7 mov %r14,%rdi
3f: e8 .byte 0xe8