------------[ cut here ]------------ HSR: Could not send supervision frame WARNING: CPU: 3 PID: 9166 at net/hsr/hsr_device.c:299 send_hsr_supervision_frame+0x889/0xb40 net/hsr/hsr_device.c:299 Kernel panic - not syncing: panic_on_warn set ... CPU: 3 PID: 9166 Comm: rsyslogd Not tainted 5.9.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x198/0x1fd lib/dump_stack.c:118 panic+0x382/0x7fb kernel/panic.c:231 __warn.cold+0x20/0x4b kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:send_hsr_supervision_frame+0x889/0xb40 net/hsr/hsr_device.c:299 Code: 03 31 ff 89 de e8 97 7b 58 f9 84 db 0f 85 8b fd ff ff e8 6a 7f 58 f9 48 c7 c7 00 31 67 89 c6 05 e4 e4 36 03 01 e8 f9 bb 28 f9 <0f> 0b e9 6c fd ff ff e8 4b 7f 58 f9 41 be 42 00 00 00 ba 01 00 00 RSP: 0000:ffffc90000598c48 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888021f55500 RSI: ffffffff815f6d85 RDI: fffff520000b317b RBP: 00000000000088fb R08: 0000000000000001 R09: ffffffff8d0c5ac7 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880552f6180 R13: 0000000000000000 R14: ffff888054cbace8 R15: ffff88802d1255c0 hsr_announce+0x122/0x320 net/hsr/hsr_device.c:404 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413 expire_timers kernel/time/timer.c:1458 [inline] __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755 __run_timers kernel/time/timer.c:1736 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1768 __do_softirq+0x1f8/0xb23 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+0x9b/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+0x235/0x280 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:check_preemption_disabled+0x43/0x130 lib/smp_processor_id.c:55 Code: da 77 65 8b 1d 9e 32 db 77 81 e3 ff ff ff 7f 31 ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b 5d 41 5c 41 5d <41> 5e c3 0f 1f 44 00 00 e8 f0 02 9d fb 31 ff 25 00 02 00 00 48 89 RSP: 0000:ffffc900011a7470 EFLAGS: 00000202 RAX: 0000000000000003 RBX: 0000000000000000 RCX: ffffffff816f4940 RDX: ffff888021f55500 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff888019e78000 R08: 0000000000000001 R09: ffffffff8d0c59e7 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888019e78000 R14: ffff88807aa82000 R15: ffff888019e78000 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:326 [inline] rcu_is_watching+0xe/0xc0 kernel/rcu/tree.c:1113 rcu_read_lock_held_common kernel/rcu/update.c:119 [inline] rcu_read_lock_held+0x18/0x40 kernel/rcu/update.c:320 css_next_child+0x130/0x2b0 kernel/cgroup/cgroup.c:4126 css_next_descendant_pre+0x61/0x180 kernel/cgroup/cgroup.c:4202 mem_cgroup_iter+0x27f/0x6e0 mm/memcontrol.c:1164 shrink_node_memcgs mm/vmscan.c:2661 [inline] shrink_node+0x5ae/0x1d60 mm/vmscan.c:2768 shrink_zones mm/vmscan.c:2971 [inline] do_try_to_free_pages+0x38b/0x1440 mm/vmscan.c:3026 try_to_free_pages+0x29e/0x7d0 mm/vmscan.c:3265 __perform_reclaim mm/page_alloc.c:4274 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4295 [inline] __alloc_pages_slowpath.constprop.0+0x995/0x28c0 mm/page_alloc.c:4699 __alloc_pages_nodemask+0x62c/0x790 mm/page_alloc.c:4915 alloc_pages_current+0x191/0x2a0 mm/mempolicy.c:2275 alloc_pages include/linux/gfp.h:545 [inline] __page_cache_alloc mm/filemap.c:957 [inline] __page_cache_alloc+0x314/0x420 mm/filemap.c:942 pagecache_get_page+0x2a6/0xf70 mm/filemap.c:1808 filemap_fault+0x1abd/0x2aa0 mm/filemap.c:2697 ext4_filemap_fault+0x87/0xb6 fs/ext4/inode.c:6060 __do_fault+0x10d/0x4d0 mm/memory.c:3606 do_read_fault mm/memory.c:3999 [inline] do_fault mm/memory.c:4127 [inline] handle_pte_fault mm/memory.c:4367 [inline] __handle_mm_fault mm/memory.c:4502 [inline] handle_mm_fault+0x3477/0x4590 mm/memory.c:4600 do_user_addr_fault+0x598/0xbf0 arch/x86/mm/fault.c:1372 handle_page_fault arch/x86/mm/fault.c:1429 [inline] exc_page_fault+0xa8/0x190 arch/x86/mm/fault.c:1482 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:538 RIP: 0033:0x7f4f513ae1fd Code: Unable to access opcode bytes at RIP 0x7f4f513ae1d3. RSP: 002b:00007f4f4e94de30 EFLAGS: 00010293 RAX: 0000000000000fd8 RBX: 0000000001395ce0 RCX: 00007f4f513ae1fd RDX: 0000000000000fff RSI: 00007f4f501825a0 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000001381260 R09: 0000000004000001 R10: 0000000000000001 R11: 0000000000000293 R12: 000000000065e420 R13: 00007f4f4e94e9c0 R14: 00007f4f519f3040 R15: 0000000000000003 Kernel Offset: disabled Rebooting in 86400 seconds..