------------[ cut here ]------------ HSR: Could not send supervision frame WARNING: CPU: 2 PID: 113 at net/hsr/hsr_device.c:294 send_hsr_supervision_frame+0x5fe/0x840 net/hsr/hsr_device.c:294 Modules linked in: CPU: 2 PID: 113 Comm: kswapd1 Not tainted 6.4.0-rc4-syzkaller-00198-g9e87b63ed37e #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 f2 73 95 f7 84 db 0f 85 01 ff ff ff e8 05 78 95 f7 48 c7 c7 60 e4 89 8b c6 05 6f fd 75 04 01 e8 d2 33 5d f7 <0f> 0b e9 e2 fe ff ff e8 e6 77 95 f7 41 be 3c 00 00 00 ba 01 00 00 RSP: 0000:ffffc90000588c70 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: ffff8880176dc800 RSI: ffffffff814c03a7 RDI: 0000000000000001 RBP: ffffc90000588cd0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 000000003a525348 R12: ffff88804808df80 R13: 0000000000000000 R14: 0000000000000017 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802c800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdd40224fa7 CR3: 0000000023ddf000 CR4: 0000000000350ee0 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:1106 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:write_comp_data+0x3c/0x90 kernel/kcov.c:236 Code: 01 00 00 49 89 f8 65 48 8b 14 25 c0 bb 03 00 a9 00 01 ff 00 74 0e 85 f6 74 59 8b 82 0c 16 00 00 85 c0 74 4f 8b 82 e8 15 00 00 <83> f8 03 75 44 48 8b 82 f0 15 00 00 8b 92 ec 15 00 00 48 8b 38 48 RSP: 0000:ffffc90001f7f3f0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000040 RCX: ffffffff89fe13ab RDX: ffff8880176dc800 RSI: 0000000000000000 RDI: 0000000000000006 RBP: ffff88804e059a08 R08: 0000000000000006 R09: 00000000f6600000 R10: 00000000f5dfefff R11: 0000000000000001 R12: 0000000000000008 R13: 000000000000000e R14: 00000000f6600000 R15: 00000000f5dfefff mtree_range_walk+0x2fb/0x940 lib/maple_tree.c:2967 mas_state_walk lib/maple_tree.c:3881 [inline] mt_find+0x495/0xa60 lib/maple_tree.c:6505 find_vma+0x10c/0x1b0 mm/mmap.c:1863 walk_page_range+0x2b1/0x4a0 mm/pagewalk.c:463 walk_mm mm/vmscan.c:4289 [inline] try_to_inc_max_seq.constprop.0+0x1239/0x2270 mm/vmscan.c:4514 get_nr_to_scan mm/vmscan.c:5304 [inline] try_to_shrink_lruvec+0x974/0xb90 mm/vmscan.c:5330 shrink_one+0x462/0x710 mm/vmscan.c:5378 shrink_many mm/vmscan.c:5430 [inline] lru_gen_shrink_node mm/vmscan.c:5547 [inline] shrink_node+0x1fd5/0x3500 mm/vmscan.c:6488 kswapd_shrink_node mm/vmscan.c:7288 [inline] balance_pgdat+0xa02/0x1ac0 mm/vmscan.c:7478 kswapd+0x677/0xd60 mm/vmscan.c:7738 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 ---------------- Code disassembly (best guess): 0: 01 00 add %eax,(%rax) 2: 00 49 89 add %cl,-0x77(%rcx) 5: f8 clc 6: 65 48 8b 14 25 c0 bb mov %gs:0x3bbc0,%rdx d: 03 00 f: a9 00 01 ff 00 test $0xff0100,%eax 14: 74 0e je 0x24 16: 85 f6 test %esi,%esi 18: 74 59 je 0x73 1a: 8b 82 0c 16 00 00 mov 0x160c(%rdx),%eax 20: 85 c0 test %eax,%eax 22: 74 4f je 0x73 24: 8b 82 e8 15 00 00 mov 0x15e8(%rdx),%eax * 2a: 83 f8 03 cmp $0x3,%eax <-- trapping instruction 2d: 75 44 jne 0x73 2f: 48 8b 82 f0 15 00 00 mov 0x15f0(%rdx),%rax 36: 8b 92 ec 15 00 00 mov 0x15ec(%rdx),%edx 3c: 48 8b 38 mov (%rax),%rdi 3f: 48 rex.W