------------[ cut here ]------------ HSR: Could not send supervision frame WARNING: CPU: 0 PID: 111 at net/hsr/hsr_device.c:294 send_hsr_supervision_frame+0x5fe/0x840 net/hsr/hsr_device.c:294 Modules linked in: CPU: 0 PID: 111 Comm: kswapd0 Not tainted 6.3.0-rc6-syzkaller-00035-g0bcc40255504 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:send_hsr_supervision_frame+0x5fe/0x840 net/hsr/hsr_device.c:294 Code: 04 31 ff 89 de e8 b2 41 a3 f7 84 db 0f 85 01 ff ff ff e8 95 45 a3 f7 48 c7 c7 e0 62 87 8b c6 05 d9 6a 82 04 01 e8 72 ca 6b f7 <0f> 0b e9 e2 fe ff ff e8 76 45 a3 f7 41 be 3c 00 00 00 ba 01 00 00 RSP: 0000:ffffc90000007c70 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: ffff888019186100 RSI: ffffffff814a8287 RDI: 0000000000000001 RBP: ffffc90000007cd0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801be9a680 R13: 0000000000000000 R14: 0000000000000017 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f41a1b719fb CR3: 0000000023610000 CR4: 0000000000150ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hsr_announce+0x10d/0x370 net/hsr/hsr_device.c:382 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers+0x29b/0x4b0 kernel/time/timer.c:1751 __run_timers kernel/time/timer.c:2022 [inline] __run_timers kernel/time/timer.c:1995 [inline] run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x3c/0x70 kernel/locking/spinlock.c:194 Code: 74 24 10 e8 16 98 61 f7 48 89 ef e8 ae 04 62 f7 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 8f 3c 54 f7 65 8b 05 60 88 01 76 85 c0 74 0a 5b 5d c3 e8 bc 53 RSP: 0000:ffffc90000f57ce8 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1cecc89 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff88803fffebd8 R08: 0000000000000001 R09: 0000000000000001 R10: fffffbfff1ced292 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000246 spin_unlock_irqrestore include/linux/spinlock.h:405 [inline] __wake_up_common_lock+0xe2/0x140 kernel/sched/wait.c:140 prepare_kswapd_sleep mm/vmscan.c:7220 [inline] kswapd_try_to_sleep mm/vmscan.c:7605 [inline] kswapd+0x445/0xd60 mm/vmscan.c:7681 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 24 10 and $0x10,%al 2: e8 16 98 61 f7 callq 0xf761981d 7: 48 89 ef mov %rbp,%rdi a: e8 ae 04 62 f7 callq 0xf76204bd f: 81 e3 00 02 00 00 and $0x200,%ebx 15: 75 25 jne 0x3c 17: 9c pushfq 18: 58 pop %rax 19: f6 c4 02 test $0x2,%ah 1c: 75 2d jne 0x4b 1e: 48 85 db test %rbx,%rbx 21: 74 01 je 0x24 23: fb sti 24: bf 01 00 00 00 mov $0x1,%edi * 29: e8 8f 3c 54 f7 callq 0xf7543cbd <-- trapping instruction 2e: 65 8b 05 60 88 01 76 mov %gs:0x76018860(%rip),%eax # 0x76018895 35: 85 c0 test %eax,%eax 37: 74 0a je 0x43 39: 5b pop %rbx 3a: 5d pop %rbp 3b: c3 retq 3c: e8 .byte 0xe8 3d: bc .byte 0xbc 3e: 53 push %rbx