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WARNING: CPU: 1 PID: 6688 at kernel/rcu/tree_stall.h:990 rcu_check_gp_start_stall+0x2cf/0x460 kernel/rcu/tree_stall.h:990
Modules linked in:
CPU: 1 PID: 6688 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:rcu_check_gp_start_stall+0x2cf/0x460 kernel/rcu/tree_stall.h:990
Code: c7 60 e6 76 94 be 04 00 00 00 e8 cc 6e 7d 00 b8 01 00 00 00 87 05 d1 ee f9 12 85 c0 0f 85 1a ff ff ff 48 c7 c0 40 99 33 8e 90 <0f> 0b 90 49 39 c7 74 47 48 c7 c0 3c 31 a9 8f 48 c1 e8 03 42 0f b6
RSP: 0018:ffffc90000a08bd8 EFLAGS: 00010046
RAX: ffffffff8e339940 RBX: 00000000fffff5e2 RCX: ffffffff817cf784
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff9476e660
RBP: ffffc90000a08e30 R08: 0000000000000003 R09: fffffbfff28edccc
R10: dffffc0000000000 R11: fffffbfff28edccc R12: dffffc0000000000
R13: ffff8880b953f580 R14: 0000000000000246 R15: ffffffff8e339940
FS: 00007f2953fae6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2953fadf00 CR3: 000000002c784000 CR4: 0000000000350ef0
Call Trace:
rcu_core+0x694/0x1830 kernel/rcu/tree.c:2466
__do_softirq+0x2c8/0x980 kernel/softirq.c:554
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633
irq_exit_rcu+0x9/0x30 kernel/softirq.c:645
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:32 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:67 [inline]
RIP: 0010:__might_resched+0x1d9/0x780 kernel/sched/core.c:10161
Code: 00 00 00 4c 89 ee 4d 89 f5 45 89 e6 48 ba 00 00 00 00 00 fc ff df 48 c7 84 24 a0 00 00 00 00 00 00 00 9c 8f 84 24 a0 00 00 00 <80> 3c 13 00 74 15 48 89 f3 e8 09 ba 92 00 48 89 de 48 ba 00 00 00
RSP: 0018:ffffc90015b8fc00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff92002b71f94 RCX: ffff888015fe8000
RDX: dffffc0000000000 RSI: ffff888015fe8000 RDI: ffffc90015b8fca0
RBP: ffffc90015b8fd18 R08: ffffffff81e3b7f1 R09: ffffc90015b8fda0
R10: dffffc0000000000 R11: fffff52002b71fb7 R12: 0000000000000000
R13: ffff888015fe843c R14: 000000000000000e R15: 1ffff92002b71f88
__might_fault+0x72/0x120 mm/memory.c:6217
_copy_from_user+0x2a/0xe0 lib/usercopy.c:14
copy_from_user include/linux/uaccess.h:183 [inline]
restore_altstack+0x99/0x150 kernel/signal.c:4320
__do_sys_rt_sigreturn+0x20d/0x270 arch/x86/kernel/signal_64.c:269
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f295327dea7
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007f2953fae0c8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f29533abf80 RCX: 00007f295327dea9
RDX: 0000000000000000 RSI: 0000800000000006 RDI: 0000000020001300
RBP: 00007f29532ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f29533abf80 R15: 00007ffe6bfdf648
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 4c 89 ee add %cl,-0x12(%rcx,%rcx,4)
6: 4d 89 f5 mov %r14,%r13
9: 45 89 e6 mov %r12d,%r14d
c: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
13: fc ff df
16: 48 c7 84 24 a0 00 00 movq $0x0,0xa0(%rsp)
1d: 00 00 00 00 00
22: 9c pushf
23: 8f 84 24 a0 00 00 00 pop 0xa0(%rsp)
* 2a: 80 3c 13 00 cmpb $0x0,(%rbx,%rdx,1) <-- trapping instruction
2e: 74 15 je 0x45
30: 48 89 f3 mov %rsi,%rbx
33: e8 09 ba 92 00 call 0x92ba41
38: 48 89 de mov %rbx,%rsi
3b: 48 rex.W
3c: ba .byte 0xba
3d: 00 00 add %al,(%rax)