------------[ cut here ]------------ HSR: Could not send supervision frame WARNING: CPU: 1 PID: 36 at net/hsr/hsr_device.c:299 send_hsr_supervision_frame+0x889/0xb40 net/hsr/hsr_device.c:299 Modules linked in: CPU: 1 PID: 36 Comm: kworker/1:1 Not tainted 5.10.0-rc6-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Workqueue: events nsim_dev_trap_report_work RIP: 0010:send_hsr_supervision_frame+0x889/0xb40 net/hsr/hsr_device.c:299 Code: 04 31 ff 89 de e8 c7 9e cd f8 84 db 0f 85 8b fd ff ff e8 aa a6 cd f8 48 c7 c7 a0 e3 6b 8a c6 05 f1 41 36 04 01 e8 43 05 0a 00 <0f> 0b e9 6c fd ff ff e8 8b a6 cd f8 41 be 42 00 00 00 ba 01 00 00 RSP: 0000:ffffc900004c8c70 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888010b08000 RSI: ffffffff8158c855 RDI: fffff52000099180 RBP: 00000000000088fb R08: 0000000000000001 R09: ffffffff8ecc1747 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888061435500 R13: 0000000000000000 R14: ffff888064a84ce8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802cd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000050 CR3: 0000000066147000 CR4: 0000000000350ee0 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 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x132/0x200 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 RIP: 0010:__slab_alloc.constprop.0+0x55/0xe0 mm/slub.c:2784 Code: 11 6e 34 07 83 f8 07 89 c2 77 6e 48 03 1c d5 c0 b6 e3 8a 4c 89 f9 44 89 f2 44 89 ee 48 89 ef 49 89 d8 e8 be f3 ff ff 41 54 9d <48> 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 c7 a7 c4 ff 48 8b RSP: 0000:ffffc900005b7b90 EFLAGS: 00000286 RAX: 0000000000000000 RBX: ffff88802cd3be10 RCX: ffffffff8155a937 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff88804037a000 R08: 0000000000000001 R09: ffffffff8ecc173f R10: fffffbfff1d982e7 R11: 0000000000000000 R12: 0000000000000286 R13: 0000000000000a20 R14: 00000000ffffffff R15: ffffffff86ec7de1 slab_alloc_node mm/slub.c:2856 [inline] kmem_cache_alloc_node+0x3ab/0x490 mm/slub.c:2927 __alloc_skb+0x71/0x550 net/core/skbuff.c:198 alloc_skb include/linux/skbuff.h:1094 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:507 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:564 [inline] nsim_dev_trap_report_work+0x2ac/0xbd0 drivers/net/netdevsim/dev.c:605 process_one_work+0x933/0x15a0 kernel/workqueue.c:2272 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296