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WARNING: CPU: 1 PID: 9085 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: 9085 Comm: syz.2.854 Not tainted 6.16.0-rc5-syzkaller-00224-g379f604cc3dc #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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 5f e0 9a e8 40 f1 80 00 b8 01 00 00 00 87 05 05 76 3e 19 85 c0 0f 85 3d 01 00 00 90 <0f> 0b 90 48 c7 c3 44 bb a9 90 48 81 fd 00 fd 5c 8e 74 5a 48 b8 00
RSP: 0018:ffffc90000a08df0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000002904 RCX: ffffffff81a1e970
RDX: fffffbfff35c0bf0 RSI: 0000000000000004 RDI: ffffffff9ae05f80
RBP: ffffffff8e5cfd00 R08: 0000000000000001 R09: fffffbfff35c0bf0
R10: 0000000000000003 R11: 0000000000000001 R12: 1ffffffff1c42240
R13: 0000000000000246 R14: ffffffff8e5cfd00 R15: ffff8880b853b2d2
FS: 0000000000000000(0000) GS:ffff888124813000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffde2ea0ac0 CR3: 000000004015e000 CR4: 00000000003526f0
DR0: 0000000000000007 DR1: 0000000000104e69 DR2: 00000000000007ff
DR3: 0000000100000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
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+0xd7b/0x1510 kernel/smp.c:885
Code: e8 6a 19 0c 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 07 1e 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
RSP: 0018:ffffc9001ed27720 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b84421e0 RCX: ffffffff81afd92d
RDX: ffff88807ab7a440 RSI: ffffffff81afd909 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000003 R14: ffffed101708843d R15: ffff8880b853b580
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1052
__flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline]
flush_tlb_mm_range+0x4a0/0x1790 arch/x86/mm/tlb.c:1451
tlb_flush arch/x86/include/asm/tlb.h:23 [inline]
tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:490 [inline]
tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:480 [inline]
tlb_flush_mmu mm/mmu_gather.c:403 [inline]
tlb_finish_mmu+0x3c9/0x7c0 mm/mmu_gather.c:497
exit_mmap+0x403/0xb90 mm/mmap.c:1297
__mmput+0x12a/0x410 kernel/fork.c:1121
mmput+0x62/0x70 kernel/fork.c:1144
exit_mm kernel/exit.c:581 [inline]
do_exit+0x7c4/0x2bd0 kernel/exit.c:952
do_group_exit+0xd3/0x2a0 kernel/exit.c:1105
get_signal+0x2673/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7d0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:111
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f74d218e929
Code: Unable to access opcode bytes at 0x7f74d218e8ff.
RSP: 002b:00007ffe892005b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 0000000000044492 RCX: 00007f74d218e929
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f74d23b5fac
RBP: 0000000000000bea R08: 00007f74d2eee000 R09: 00000001892008af
R10: 00007ffe892006b0 R11: 0000000000000246 R12: 00007f74d23b5fac
R13: 00007ffe892006b0 R14: 000000000004507c R15: 00007ffe892006d0
----------------
Code disassembly (best guess):
0: e8 6a 19 0c 00 call 0xc196f
5: 45 85 ed test %r13d,%r13d
8: 74 46 je 0x50
a: 48 8b 14 24 mov (%rsp),%rdx
e: 49 89 d6 mov %rdx,%r14
11: 49 89 d5 mov %rdx,%r13
14: 49 c1 ee 03 shr $0x3,%r14
18: 41 83 e5 07 and $0x7,%r13d
1c: 4d 01 e6 add %r12,%r14
1f: 41 83 c5 03 add $0x3,%r13d
23: e8 07 1e 0c 00 call 0xc1e2f
28: f3 90 pause
* 2a: 41 0f b6 06 movzbl (%r14),%eax <-- trapping instruction
2e: 41 38 c5 cmp %al,%r13b
31: 7c 08 jl 0x3b
33: 84 c0 test %al,%al
35: 0f 85 6f 05 00 00 jne 0x5aa
3b: 8b 43 08 mov 0x8(%rbx),%eax
3e: 31 ff xor %edi,%edi