------------[ cut here ]------------ WARNING: CPU: 1 PID: 0 at net/ipv4/tcp_timer.c:476 tcp_retransmit_timer+0x19c5/0x33f0 net/ipv4/tcp_timer.c:476 Modules linked in: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19.0-rc8-syzkaller-00003-g5de64d44968e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 RIP: 0010:tcp_retransmit_timer+0x19c5/0x33f0 net/ipv4/tcp_timer.c:476 Code: 25 18 00 00 8b 95 b4 07 00 00 48 89 ef 8b 74 24 10 e8 9f c3 ff ff 41 89 c5 0f b6 c0 89 44 24 10 e9 49 f2 ff ff e8 ab 89 99 f9 <0f> 0b e9 3c eb ff ff e8 9f 89 99 f9 48 8b 9c 24 c8 00 00 00 48 85 RSP: 0018:ffffc900001e0b48 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000100 RDX: ffff888011a19d80 RSI: ffffffff87e0e255 RDI: ffff888076736e80 RBP: ffff888076736c00 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff888076736d30 R13: ffffffff8ba0f200 R14: 0000000000000000 R15: ffff888076736c30 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f198bb9d090 CR3: 000000002f46b000 CR4: 0000000000350ee0 Call Trace: <IRQ> tcp_write_timer_handler+0x5e6/0xbc0 net/ipv4/tcp_timer.c:626 tcp_write_timer+0xa2/0x2b0 net/ipv4/tcp_timer.c:646 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers.part.0+0x679/0xa80 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline] RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline] RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline] RIP: 0010:acpi_idle_do_entry+0x1c9/0x240 drivers/acpi/processor_idle.c:554 Code: 89 de e8 fa b8 ff f7 84 db 75 98 e8 f1 bc ff f7 e8 ec 0b 06 f8 eb 0c e8 e5 bc ff f7 0f 00 2d 5e 78 b9 00 e8 d9 bc ff f7 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 24 b9 ff f7 48 85 db RSP: 0018:ffffc90000177d20 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888011a19d80 RSI: ffffffff897aaf27 RDI: 0000000000000000 RBP: ffff8881454e1064 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff8881454e1000 R14: ffff8881454e1064 R15: ffff88814582f804 acpi_idle_enter+0x369/0x510 drivers/acpi/processor_idle.c:691 cpuidle_enter_state+0x1b1/0xc80 drivers/cpuidle/cpuidle.c:237 cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:351 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3e8/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266 secondary_startup_64_no_verify+0xce/0xdb </TASK> ---------------- Code disassembly (best guess): 0: 89 de mov %ebx,%esi 2: e8 fa b8 ff f7 callq 0xf7ffb901 7: 84 db test %bl,%bl 9: 75 98 jne 0xffffffa3 b: e8 f1 bc ff f7 callq 0xf7ffbd01 10: e8 ec 0b 06 f8 callq 0xf8060c01 15: eb 0c jmp 0x23 17: e8 e5 bc ff f7 callq 0xf7ffbd01 1c: 0f 00 2d 5e 78 b9 00 verw 0xb9785e(%rip) # 0xb97881 23: e8 d9 bc ff f7 callq 0xf7ffbd01 28: fb sti 29: f4 hlt * 2a: 9c pushfq <-- trapping instruction 2b: 5b pop %rbx 2c: 81 e3 00 02 00 00 and $0x200,%ebx 32: fa cli 33: 31 ff xor %edi,%edi 35: 48 89 de mov %rbx,%rsi 38: e8 24 b9 ff f7 callq 0xf7ffb961 3d: 48 85 db test %rbx,%rbx