watchdog: BUG: soft lockup - CPU#0 stuck for 24s! [syz-executor.5:7228] Modules linked in: irq event stamp: 5758943 hardirqs last enabled at (5758942): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (5758943): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (5749102): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (5749105): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 7228 Comm: syz-executor.5 Not tainted 5.10.229 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:stack_trace_consume_entry+0x85/0x160 kernel/stacktrace.c:88 Code: 0f 83 81 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 0c 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 <7c> 08 84 d2 0f 85 98 00 00 00 8b 43 0c 85 c0 75 57 48 b8 00 00 00 RSP: 0018:ffff88806ce09688 EFLAGS: 00000202 RAX: 0000000000000007 RBX: ffff88806ce09760 RCX: 1ffff1100d9c1201 RDX: 0000000000000000 RSI: ffffffff831323fd RDI: ffff88806ce0976c RBP: 0000000000000005 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9c12c2 R12: ffff88806ce09760 R13: 0000000000000000 R14: ffff888009289a40 R15: 0000000000000170 FS: 00007f74213fd700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555762adc58 CR3: 00000000497b0000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000d0602 Call Trace: arch_stack_walk+0x73/0xf0 arch/x86/kernel/stacktrace.c:27 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] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x13b/0x310 mm/slub.c:2909 mem_pool_alloc mm/kmemleak.c:423 [inline] create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578 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] kmem_cache_alloc_node+0x169/0x330 mm/slub.c:2932 __alloc_skb+0x6d/0x5b0 net/core/skbuff.c:199 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:447 netdev_alloc_skb include/linux/skbuff.h:2854 [inline] dev_alloc_skb include/linux/skbuff.h:2867 [inline] __ieee80211_beacon_get+0x3af/0x1440 net/mac80211/tx.c:4876 ieee80211_beacon_get_tim+0x88/0x9f0 net/mac80211/tx.c:4990 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x940 drivers/net/wireless/mac80211_hwsim.c:1740 __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 __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:rcu_read_unlock include/linux/rcupdate.h:767 [inline] RIP: 0010:mod_objcg_state mm/slab.h:314 [inline] RIP: 0010:memcg_slab_free_hook mm/slab.h:383 [inline] RIP: 0010:memcg_slab_free_hook mm/slab.h:351 [inline] RIP: 0010:do_slab_free mm/slub.c:3105 [inline] RIP: 0010:___cache_free+0x1aa/0x360 mm/slub.c:3156 Code: af 80 00 00 00 0f 85 c3 00 00 00 9c 41 5d fa 41 f7 c5 00 02 00 00 0f 85 5d 01 00 00 44 89 fa 44 89 f6 e8 09 11 02 00 41 55 9d 21 c3 79 02 85 c0 0f 85 f7 00 00 00 65 ff 0d 92 ef 95 7e e8 1d RSP: 0018:ffff88804c5375a0 EFLAGS: 00000246 RAX: 00000000005771b1 RBX: ffff88804ce116c0 RCX: 1ffffffff0d11b5a RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff816c8108 RBP: ffff88803be53a00 R08: 0000000000000001 R09: ffffffff8686a73f R10: fffffbfff0d0d4e7 R11: 0000000000000001 R12: ffff8880083f6000 R13: 0000000000000246 R14: 0000000000000006 R15: 00000000ffffff98 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 kmalloc_array include/linux/slab.h:592 [inline] kcalloc include/linux/slab.h:603 [inline] ext4_find_extent+0xa77/0xd70 fs/ext4/extents.c:906 ext4_ext_map_blocks+0x1c8/0x5830 fs/ext4/extents.c:4159 ext4_map_blocks+0x63f/0x1910 fs/ext4/inode.c:672 ext4_getblk+0x144/0x680 fs/ext4/inode.c:869 ext4_bread+0x29/0x1f0 fs/ext4/inode.c:921 ext4_append+0x228/0x4e0 fs/ext4/namei.c:83 ext4_init_new_dir+0x25e/0x4d0 fs/ext4/namei.c:2876 ext4_mkdir+0x3c1/0xb10 fs/ext4/namei.c:2921 vfs_mkdir+0x493/0x750 fs/namei.c:3706 do_mkdirat+0x150/0x2b0 fs/namei.c:3728 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f7423e86c27 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:00007f74213fcfa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7423e86c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000180 RBP: 00007f74213fd040 R08: 0000000000000000 R09: 0000000000100000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000020000180 R14: 00007f74213fd000 R15: 0000000000000000 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 hpet: Lost 7 RTC interrupts hpet: Lost 1 RTC interrupts ---------------- Code disassembly (best guess): 0: 0f 83 81 00 00 00 jae 0x87 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 8d 7b 0c lea 0xc(%rbx),%rdi 14: 48 89 fa mov %rdi,%rdx 17: 48 c1 ea 03 shr $0x3,%rdx 1b: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx 1f: 48 89 f8 mov %rdi,%rax 22: 83 e0 07 and $0x7,%eax 25: 83 c0 03 add $0x3,%eax 28: 38 d0 cmp %dl,%al * 2a: 7c 08 jl 0x34 <-- trapping instruction 2c: 84 d2 test %dl,%dl 2e: 0f 85 98 00 00 00 jne 0xcc 34: 8b 43 0c mov 0xc(%rbx),%eax 37: 85 c0 test %eax,%eax 39: 75 57 jne 0x92 3b: 48 rex.W 3c: b8 .byte 0xb8 3d: 00 00 add %al,(%rax)