FAT-fs (loop4): Can't find a valid FAT filesystem watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.3:5766] Modules linked in: irq event stamp: 8136759 hardirqs last enabled at (8136758): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (8136759): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (8121750): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (8121753): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 5766 Comm: syz-executor.3 Not tainted 5.10.154 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:core_kernel_text kernel/extable.c:75 [inline] RIP: 0010:kernel_text_address+0x18/0x120 kernel/extable.c:125 Code: 81 ff 00 a0 67 85 0f 92 c0 e9 74 92 04 03 0f 1f 40 00 55 48 89 fd 48 83 ec 08 48 81 ff 00 00 00 81 72 09 48 81 ff 08 40 20 84 <72> 4c 48 c7 c0 c4 d8 66 85 48 ba 00 00 00 00 00 fc ff df 48 89 c1 RSP: 0018:ffff88806cf096f8 EFLAGS: 00000283 RAX: dffffc0000000000 RBX: ffffffff83bc223f RCX: 1ffff1100d9e1201 RDX: 1ffff1100d9e12f0 RSI: ffff88806cf09b58 RDI: ffffffff83bc223f RBP: ffffffff83bc223f R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9e12d4 R12: ffff88806cf097f0 R13: 0000000000000000 R14: ffff88804713e600 R15: 0000000000000200 FS: 00007fe2a5e4b700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c74f963678 CR3: 000000004822e000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __kernel_text_address+0x9/0x40 kernel/extable.c:105 unwind_get_return_address arch/x86/kernel/unwind_orc.c:323 [inline] unwind_get_return_address+0x55/0xa0 arch/x86/kernel/unwind_orc.c:318 arch_stack_walk+0x99/0xf0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc9/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] __kmalloc_node_track_caller+0x189/0x3f0 mm/slub.c:4496 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0xb1/0x620 net/core/skbuff.c:210 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:446 netdev_alloc_skb include/linux/skbuff.h:2836 [inline] dev_alloc_skb include/linux/skbuff.h:2849 [inline] __ieee80211_beacon_get+0x3af/0x13a0 net/mac80211/tx.c:4874 ieee80211_beacon_get_tim+0x88/0x910 net/mac80211/tx.c:4988 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x8f0 drivers/net/wireless/mac80211_hwsim.c:1735 __iterate_interfaces+0x1f0/0x530 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x72/0x180 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1788 __run_hrtimer kernel/time/hrtimer.c:1583 [inline] __hrtimer_run_queues+0x5e8/0xb50 kernel/time/hrtimer.c:1647 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1664 __do_softirq+0x1b8/0x86b kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __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+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:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:do_slab_free mm/slub.c:3115 [inline] RIP: 0010:___cache_free+0x1e7/0x340 mm/slub.c:3156 Code: 7e e8 5d 12 c2 ff 48 c7 c7 a0 81 ff 84 48 c7 c6 97 98 6b 81 e8 8a 5b bb ff 48 89 ef e8 b2 7f ff ff 49 8b 04 24 65 48 8b 50 08 <65> 48 03 05 99 7c 96 7e 48 8b 3c 24 48 39 78 10 0f 85 06 01 00 00 RSP: 0018:ffff888048016dc8 EFLAGS: 00000286 RAX: 000000000003fff0 RBX: ffff88800d602500 RCX: ffff888048016d50 RDX: 000000000001c5bc RSI: 0000000000000000 RDI: ffff88804713eea0 RBP: ffff88800cfb1000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff888007fe6280 R13: 0000000000000246 R14: 0000000000000006 R15: 00000000fffffd78 qlink_free mm/kasan/quarantine.c:151 [inline] qlist_free_all+0x59/0xe0 mm/kasan/quarantine.c:170 quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:267 __kasan_kmalloc.constprop.0+0xa2/0xd0 mm/kasan/common.c:442 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] kmem_cache_alloc_node+0x14b/0x370 mm/slub.c:2932 __alloc_skb+0x6d/0x620 net/core/skbuff.c:198 alloc_skb include/linux/skbuff.h:1096 [inline] alloc_skb_with_frags+0x92/0x570 net/core/skbuff.c:5894 sock_alloc_send_pskb+0x741/0x8a0 net/core/sock.c:2348 __ip_append_data+0x1628/0x3310 net/ipv4/ip_output.c:1110 ip_make_skb+0x22a/0x2a0 net/ipv4/ip_output.c:1646 udp_sendmsg+0x18d3/0x20a0 net/ipv4/udp.c:1237 udpv6_sendmsg+0x146a/0x29b0 net/ipv6/udp.c:1345 inet6_sendmsg+0x105/0x140 net/ipv6/af_inet6.c:638 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xf2/0x190 net/socket.c:671 ____sys_sendmsg+0x334/0x870 net/socket.c:2342 ___sys_sendmsg+0xf3/0x170 net/socket.c:2396 __sys_sendmmsg+0x195/0x470 net/socket.c:2486 __do_sys_sendmmsg net/socket.c:2515 [inline] __se_sys_sendmmsg net/socket.c:2512 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2512 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fe2a88d5b19 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:00007fe2a5e4b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fe2a89e8f60 RCX: 00007fe2a88d5b19 RDX: 04000000000000b3 RSI: 0000000020004d00 RDI: 0000000000000007 RBP: 00007fe2a892ff6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000004000880 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeff0c69ef R14: 00007fe2a5e4b300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:689 ---------------- Code disassembly (best guess): 0: 81 ff 00 a0 67 85 cmp $0x8567a000,%edi 6: 0f 92 c0 setb %al 9: e9 74 92 04 03 jmpq 0x3049282 e: 0f 1f 40 00 nopl 0x0(%rax) 12: 55 push %rbp 13: 48 89 fd mov %rdi,%rbp 16: 48 83 ec 08 sub $0x8,%rsp 1a: 48 81 ff 00 00 00 81 cmp $0xffffffff81000000,%rdi 21: 72 09 jb 0x2c 23: 48 81 ff 08 40 20 84 cmp $0xffffffff84204008,%rdi * 2a: 72 4c jb 0x78 <-- trapping instruction 2c: 48 c7 c0 c4 d8 66 85 mov $0xffffffff8566d8c4,%rax 33: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 3a: fc ff df 3d: 48 89 c1 mov %rax,%rcx