node 1: slabs: 1646, objs: 19752, free: 9 ------------[ cut here ]------------ HSR: Could not send supervision frame WARNING: CPU: 0 PID: 10 at net/hsr/hsr_device.c:299 send_hsr_supervision_frame+0x889/0xb40 net/hsr/hsr_device.c:299 Modules linked in: CPU: 0 PID: 10 Comm: ksoftirqd/0 Not tainted 5.10.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:send_hsr_supervision_frame+0x889/0xb40 net/hsr/hsr_device.c:299 Code: 04 31 ff 89 de e8 b7 b5 cd f8 84 db 0f 85 8b fd ff ff e8 9a bd cd f8 48 c7 c7 60 ed 6b 8a c6 05 f1 41 36 04 01 e8 71 03 0a 00 <0f> 0b e9 6c fd ff ff e8 7b bd cd f8 41 be 42 00 00 00 ba 01 00 00 RSP: 0000:ffffc90000cf7af0 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888010d79a40 RSI: ffffffff8158e165 RDI: fffff5200019ef50 RBP: 00000000000088fb R08: 0000000000000001 R09: ffff8880b9e309e7 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88802fa3fc00 R13: 0000000000000000 R14: ffff88806db3cce8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c32f213c5e CR3: 000000001265a000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hsr_announce+0x122/0x320 net/hsr/hsr_device.c:404 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1410 expire_timers kernel/time/timer.c:1455 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1747 __run_timers kernel/time/timer.c:1728 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1760 __do_softirq+0x2a0/0x9f6 kernel/softirq.c:298 run_ksoftirqd kernel/softirq.c:653 [inline] run_ksoftirqd+0x2d/0x50 kernel/softirq.c:645 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:165 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296