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WARNING: CPU: 0 PID: 17925 at kernel/rcu/tree_stall.h:970 rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:962
Modules linked in:
CPU: 0 PID: 17925 Comm: syz.1.3778 Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:970
Code: ff ff ff 48 c7 c7 00 3f a0 96 be 04 00 00 00 e8 3a b3 66 00 48 89 df b8 01 00 00 00 87 05 5c a1 34 15 85 c0 0f 85 19 ff ff ff <0f> 0b 48 81 ff 00 00 93 8c 74 47 48 c7 c0 64 ba fe 8d 48 c1 e8 03
RSP: 0018:ffffc90000007b78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff8c930000 RCX: ffffffff816b9d96
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8c930000
RBP: ffffc90000007df0 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff2d407e0 R11: 1ffffffff2d407e0 R12: 0000000000002904
R13: dffffc0000000000 R14: 0000000000000a06 R15: dffffc0000000000
FS: 00007ff0d44746c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000006f8000 CR3: 000000004a043000 CR4: 00000000003506f0
DR0: 0000000000000007 DR1: 000000000000000b DR2: 0000000000000002
DR3: 0000000000000009 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_core+0x5d9/0x16a0 kernel/rcu/tree.c:2552
handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
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+0x2a/0x80 kernel/entry/common.c:118
Code: 41 56 53 48 89 f3 49 89 fe 48 8b 7c 24 10 e8 ed fa ff ff 66 90 66 90 e8 34 9c 77 f7 e8 af 9a 77 f7 fb 65 48 8b 05 96 d7 f2 75 <48> 8b 70 08 40 f6 c6 3f 74 0b 4c 89 f7 5b 41 5e e9 91 34 5e f7 48
RSP: 0018:ffffc900051c7f08 EFLAGS: 00000286
RAX: ffff88802b765940 RBX: 0000000000000027 RCX: 1cadfc7569981300
RDX: dffffc0000000000 RSI: ffffffff8a6bffe0 RDI: ffffffff8abf1360
RBP: ffffc900051c7f48 R08: dffffc0000000000 R09: fffffbfff1bfd0b6
R10: fffffbfff1bfd0b6 R11: 1ffffffff1bfd0b5 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc900051c7f58 R15: 0000000000000000
do_syscall_64+0x24/0xa0 arch/x86/entry/common.c:77
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff0d35858e7
Code: 0b e9 68 fe ff ff 48 83 c4 18 48 8d 3d b2 6f d6 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 13 f8 fb ff 0f 1f 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007ff0d4473b08 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007ff0d4473c70 RCX: 00007ff0d35858e7
RDX: 00007ff0d4473b40 RSI: 00007ff0d4473c70 RDI: 0000000000000021
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ff0d37b5fac
R13: 0000000000000000 R14: 00007fff89f20e70 R15: 00007fff89f20f58
----------------
Code disassembly (best guess):
0: 41 56 push %r14
2: 53 push %rbx
3: 48 89 f3 mov %rsi,%rbx
6: 49 89 fe mov %rdi,%r14
9: 48 8b 7c 24 10 mov 0x10(%rsp),%rdi
e: e8 ed fa ff ff call 0xfffffb00
13: 66 90 xchg %ax,%ax
15: 66 90 xchg %ax,%ax
17: e8 34 9c 77 f7 call 0xf7779c50
1c: e8 af 9a 77 f7 call 0xf7779ad0
21: fb sti
22: 65 48 8b 05 96 d7 f2 mov %gs:0x75f2d796(%rip),%rax # 0x75f2d7c0
29: 75
* 2a: 48 8b 70 08 mov 0x8(%rax),%rsi <-- trapping instruction
2e: 40 f6 c6 3f test $0x3f,%sil
32: 74 0b je 0x3f
34: 4c 89 f7 mov %r14,%rdi
37: 5b pop %rbx
38: 41 5e pop %r14
3a: e9 91 34 5e f7 jmp 0xf75e34d0
3f: 48 rex.W