------------[ cut here ]------------ HSR: Could not send supervision frame WARNING: CPU: 3 PID: 112 at net/hsr/hsr_device.c:294 send_hsr_supervision_frame+0x608/0x810 net/hsr/hsr_device.c:294 Modules linked in: CPU: 3 PID: 112 Comm: kswapd0 Not tainted 6.5.0-rc6-syzkaller-00036-g4853c74bd7ab #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:send_hsr_supervision_frame+0x608/0x810 net/hsr/hsr_device.c:294 Code: 04 31 ff 89 de e8 58 19 75 f7 84 db 0f 85 bd fe ff ff e8 1b 1e 75 f7 48 c7 c7 e0 89 ad 8b c6 05 5f ed 84 04 01 e8 48 e0 3b f7 <0f> 0b e9 9e fe ff ff e8 fc 1d 75 f7 41 be 3c 00 00 00 ba 01 00 00 RSP: 0000:ffffc900005e0bd8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: ffff888017692400 RSI: ffffffff814ccc86 RDI: 0000000000000001 RBP: ffffc900005e0c40 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 000000003a525348 R12: ffff888074c8e980 R13: 0000000000000000 R14: ffffffff8a10eca0 R15: 0000000000000017 FS: 0000000000000000(0000) GS:ffff88802c900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000044bf85 CR3: 0000000016065000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hsr_announce+0x116/0x380 net/hsr/hsr_device.c:382 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb10 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x218/0x965 kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109 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+0x31/0x70 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 f6 3d 31 f7 48 89 df e8 ce bc 31 f7 f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 75 5f 23 f7 65 8b 05 46 ed cd 75 85 c0 74 12 5b RSP: 0000:ffffc90001f97ca8 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffff88803fffebd8 RCX: 1ffffffff1d56e09 RDX: 0000000000000000 RSI: ffffffff8a6c80a0 RDI: ffffffff8ac81200 RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8eaba1d7 R11: 0000000000000000 R12: ffff88803fffebd8 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000003 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] __wake_up_common_lock+0xe3/0x140 kernel/sched/wait.c:140 prepare_kswapd_sleep+0x5b/0x270 mm/vmscan.c:7273 kswapd_try_to_sleep mm/vmscan.c:7618 [inline] kswapd+0x355/0xbf0 mm/vmscan.c:7734 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 ---------------- Code disassembly (best guess): 0: f5 cmc 1: 53 push %rbx 2: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 7: 48 89 fb mov %rdi,%rbx a: 48 83 c7 18 add $0x18,%rdi e: e8 f6 3d 31 f7 call 0xf7313e09 13: 48 89 df mov %rbx,%rdi 16: e8 ce bc 31 f7 call 0xf731bce9 1b: f7 c5 00 02 00 00 test $0x200,%ebp 21: 75 1f jne 0x42 23: 9c pushf 24: 58 pop %rax 25: f6 c4 02 test $0x2,%ah 28: 75 2f jne 0x59 * 2a: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction 2f: e8 75 5f 23 f7 call 0xf7235fa9 34: 65 8b 05 46 ed cd 75 mov %gs:0x75cded46(%rip),%eax # 0x75cded81 3b: 85 c0 test %eax,%eax 3d: 74 12 je 0x51 3f: 5b pop %rbx