watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.0:8719] Modules linked in: irq event stamp: 6310019 hardirqs last enabled at (6310018): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (6310019): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (6301556): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (6301559): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 8719 Comm: syz-executor.0 Not tainted 5.10.149 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:task_stack_page include/linux/sched/task_stack.h:21 [inline] RIP: 0010:in_task_stack+0x0/0x40 arch/x86/kernel/dumpstack.c:35 Code: 55 08 48 89 45 10 48 8b 40 f8 48 89 45 18 b8 01 00 00 00 5d 41 5c e9 2f 47 40 00 5b 48 89 ee 4c 89 e7 5d 41 5c e9 40 00 00 00 <48> 8b 46 18 48 8d 88 00 80 00 00 48 39 f8 77 25 48 39 f9 76 20 48 RSP: 0018:ffff88806cf09838 EFLAGS: 00000282 RAX: dffffc0000000000 RBX: ffff888017edcc80 RCX: ffff88806cf098f0 RDX: ffff88806cf098d0 RSI: ffff888017edcc80 RDI: ffff88806cf09880 RBP: ffff88806cf098d0 R08: 0000000000000001 R09: ffff88806cf098d0 R10: ffffed100d9e1325 R11: 0000000000000001 R12: ffff88806cf09880 R13: ffff88806cf098f8 R14: ffff88806cf09908 R15: ffff88806cf098d0 FS: 00007f8e58826700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdb7614c48 CR3: 00000000473ae000 CR4: 0000000000350ee0 Call Trace: get_stack_info_noinstr+0x12/0xe0 arch/x86/kernel/dumpstack_64.c:157 get_stack_info+0x2b/0x90 arch/x86/kernel/dumpstack_64.c:183 __unwind_start+0x4b6/0x7e0 arch/x86/kernel/unwind_orc.c:670 unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch_stack_walk+0x5f/0xf0 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 __save_stack_trace mm/kmemleak.c:563 [inline] create_object.isra.0+0x372/0xa20 mm/kmemleak.c:618 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x159/0x360 mm/slub.c:2909 __skb_ext_alloc+0x19/0x90 net/core/skbuff.c:6223 skb_ext_add+0x508/0x670 net/core/skbuff.c:6318 skb_set_kcov_handle include/linux/skbuff.h:4630 [inline] skb_set_kcov_handle include/linux/skbuff.h:4620 [inline] __alloc_skb+0x3c1/0x620 net/core/skbuff.c:253 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:446 netdev_alloc_skb include/linux/skbuff.h:2834 [inline] dev_alloc_skb include/linux/skbuff.h:2847 [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 cd 19 c2 ff 48 c7 c7 a0 80 ff 84 48 c7 c6 27 91 6b 81 e8 fa 62 bb ff 48 89 ef e8 b2 7f ff ff 49 8b 04 24 65 48 8b 50 08 <65> 48 03 05 09 84 96 7e 48 8b 3c 24 48 39 78 10 0f 85 06 01 00 00 RSP: 0018:ffff8880443ef900 EFLAGS: 00000246 RAX: 000000000003ff90 RBX: ffff88803e0f1100 RCX: ffffea0000f83c00 RDX: 00000000000343d7 RSI: ffffea0000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: 0000000000000011 R09: ffffffff816bc901 R10: ffff88801da157a0 R11: 0000000000000001 R12: ffff888007fe5dc0 R13: ffffea0000f83c00 R14: ffffffff80000000 R15: ffff88800c592d60 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] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x13b/0x360 mm/slub.c:2909 kmem_cache_zalloc include/linux/slab.h:654 [inline] journal_alloc_journal_head fs/jbd2/journal.c:2683 [inline] jbd2_journal_add_journal_head+0x1a3/0x540 fs/jbd2/journal.c:2752 jbd2_journal_get_create_access+0x40/0x560 fs/jbd2/transaction.c:1245 __ext4_journal_get_create_access+0x43/0x90 fs/ext4/ext4_jbd2.c:314 ext4_getblk+0x318/0x680 fs/ext4/inode.c:872 ext4_bread+0x29/0x1f0 fs/ext4/inode.c:900 ext4_append+0x228/0x4e0 fs/ext4/namei.c:83 ext4_init_new_dir+0x25e/0x4d0 fs/ext4/namei.c:2816 ext4_mkdir+0x3c1/0xb10 fs/ext4/namei.c:2861 vfs_mkdir+0x41f/0x660 fs/namei.c:3645 do_mkdirat+0x145/0x2a0 fs/namei.c:3668 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f8e5b2afc27 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 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:00007f8e58825fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8e5b2afc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100 RBP: 00007f8e58826040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000020000100 R14: 00007f8e58826000 R15: 0000000000000000 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: 55 push %rbp 1: 08 48 89 or %cl,-0x77(%rax) 4: 45 10 48 8b adc %r9b,-0x75(%r8) 8: 40 f8 rex clc a: 48 89 45 18 mov %rax,0x18(%rbp) e: b8 01 00 00 00 mov $0x1,%eax 13: 5d pop %rbp 14: 41 5c pop %r12 16: e9 2f 47 40 00 jmpq 0x40474a 1b: 5b pop %rbx 1c: 48 89 ee mov %rbp,%rsi 1f: 4c 89 e7 mov %r12,%rdi 22: 5d pop %rbp 23: 41 5c pop %r12 25: e9 40 00 00 00 jmpq 0x6a * 2a: 48 8b 46 18 mov 0x18(%rsi),%rax <-- trapping instruction 2e: 48 8d 88 00 80 00 00 lea 0x8000(%rax),%rcx 35: 48 39 f8 cmp %rdi,%rax 38: 77 25 ja 0x5f 3a: 48 39 f9 cmp %rdi,%rcx 3d: 76 20 jbe 0x5f 3f: 48 rex.W