watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:5626] Modules linked in: irq event stamp: 7756849 hardirqs last enabled at (7756848): [<ffffffff84000d02>] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (7756849): [<ffffffff83e6374b>] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (7726104): [<ffffffff84001092>] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (7726107): [<ffffffff84001092>] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 5626 Comm: syz-executor.1 Not tainted 5.10.230 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x3ca/0x1a90 arch/x86/kernel/unwind_orc.c:471 Code: 0f 85 8c 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 48 c1 ea 03 80 3c 02 00 0f 85 71 15 00 00 48 89 c8 4d 8b 4d 38 <48> ba 00 00 00 00 00 fc ff df 48 c1 e8 03 0f b6 34 10 48 8d 41 01 RSP: 0018:ffff88806ce097b8 EFLAGS: 00000246 RAX: ffffffff85c69596 RBX: 0000000000000001 RCX: ffffffff85c69596 RDX: 1ffff1100d9c1319 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff88806ce098c5 R08: ffffffff85c6959b R09: ffff88804d6d7b48 R10: 0000000000032042 R11: 1ffff1100d9c12ff R12: ffff88806ce098d8 R13: ffff88806ce09890 R14: 1ffff1100d9c12ff R15: ffffffff85c6959a FS: 00007efe54ca1700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cf2c000 CR3: 000000000e028000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000dd060a Call Trace: <IRQ> arch_stack_walk+0x83/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0x110/0x160 mm/kasan/common.c:422 slab_free_hook mm/slub.c:1542 [inline] slab_free_freelist_hook+0xa9/0x180 mm/slub.c:1576 slab_free mm/slub.c:3149 [inline] kmem_cache_free+0xa7/0x2d0 mm/slub.c:3165 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:637 __kfree_skb net/core/skbuff.c:694 [inline] consume_skb net/core/skbuff.c:849 [inline] consume_skb+0x11d/0x2b0 net/core/skbuff.c:843 mac80211_hwsim_tx_frame+0x15a/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1717 mac80211_hwsim_beacon_tx+0x494/0x940 drivers/net/wireless/mac80211_hwsim.c:1770 __iterate_interfaces+0x1f0/0x550 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x71/0x1c0 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1793 __run_hrtimer kernel/time/hrtimer.c:1586 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1650 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1667 __do_softirq+0x1b8/0x7c9 kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 </IRQ> __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+0x80/0xa0 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+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:slab_free mm/slub.c:3149 [inline] RIP: 0010:kfree+0xa5/0x340 mm/slub.c:4125 Code: 08 48 8d 50 ff a8 01 48 0f 45 ea 48 8b 55 08 48 8d 42 ff 83 e2 01 48 0f 44 c5 48 8b 00 f6 c4 02 0f 84 19 01 00 00 4c 8b 75 18 <48> 8d 4c 24 0c 48 8d 54 24 18 4c 89 64 24 10 48 8d 74 24 10 c7 44 RSP: 0018:ffff88804d6d7420 EFLAGS: 00000202 RAX: 0100000000010200 RBX: ffff88801f0588c0 RCX: ffffc90000bf5000 RDX: 0000000000000000 RSI: ffffffff83143dff RDI: ffff88806ce3c128 RBP: ffffea00006bb000 R08: 0000000000000001 R09: ffff888047ff7cef R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801aec3800 R13: ffff88801aec3800 R14: ffff888008041140 R15: 0000000000000007 skb_free_head net/core/skbuff.c:605 [inline] pskb_expand_head+0xb0f/0x1040 net/core/skbuff.c:1676 netlink_trim+0x1ee/0x250 net/netlink/af_netlink.c:1304 netlink_broadcast_filtered+0x60/0xdc0 net/netlink/af_netlink.c:1509 netlink_broadcast net/netlink/af_netlink.c:1554 [inline] nlmsg_multicast include/net/netlink.h:1033 [inline] nlmsg_notify+0x94/0x290 net/netlink/af_netlink.c:2543 rtmsg_fib+0x399/0xf40 net/ipv4/fib_semantics.c:541 fib_table_insert+0xab9/0x1af0 net/ipv4/fib_trie.c:1354 fib_magic.isra.0+0x29d/0x2f0 net/ipv4/fib_frontend.c:1092 fib_add_ifaddr+0x69c/0x7e0 net/ipv4/fib_frontend.c:1138 fib_netdev_event+0x39d/0x700 net/ipv4/fib_frontend.c:1476 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xb3/0x110 kernel/notifier.c:410 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2047 call_netdevice_notifiers_extack net/core/dev.c:2059 [inline] call_netdevice_notifiers net/core/dev.c:2073 [inline] __dev_notify_flags+0x110/0x2c0 net/core/dev.c:8564 dev_change_flags+0x100/0x160 net/core/dev.c:8602 dev_ifsioc+0x5b9/0xa00 net/core/dev_ioctl.c:230 dev_ioctl+0x23c/0xd30 net/core/dev_ioctl.c:481 sock_do_ioctl+0x17d/0x300 net/socket.c:1089 sock_ioctl+0x3ea/0x700 net/socket.c:1206 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x19a/0x210 fs/ioctl.c:739 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7efe5776db19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007efe54ca1188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007efe578810e0 RCX: 00007efe5776db19 RDX: 0000000020000140 RSI: 0000000000008914 RDI: 000000000000000a RBP: 00007efe577c7f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc7802b96f R14: 00007efe54ca1300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:706 ---------------- Code disassembly (best guess): 0: 0f 85 8c 01 00 00 jne 0x192 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 8b 54 24 08 mov 0x8(%rsp),%rdx 15: 48 c1 ea 03 shr $0x3,%rdx 19: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 1d: 0f 85 71 15 00 00 jne 0x1594 23: 48 89 c8 mov %rcx,%rax 26: 4d 8b 4d 38 mov 0x38(%r13),%r9 * 2a: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx <-- trapping instruction 31: fc ff df 34: 48 c1 e8 03 shr $0x3,%rax 38: 0f b6 34 10 movzbl (%rax,%rdx,1),%esi 3c: 48 8d 41 01 lea 0x1(%rcx),%rax