watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.7:4841] Modules linked in: irq event stamp: 4790647 hardirqs last enabled at (4790646): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4790647): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (4769814): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4769817): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 4841 Comm: syz-executor.7 Not tainted 5.10.229 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:168 [inline] RIP: 0010:unwind_next_frame+0x205/0x1a90 arch/x86/kernel/unwind_orc.c:448 Code: 52 ff 39 d6 0f 83 0f 11 00 00 48 ba 00 00 00 00 00 fc ff df 89 f1 48 8d 3c 8d 2c c0 d6 85 49 89 f8 49 c1 e8 03 45 0f b6 04 10 <48> 89 fa 83 e2 07 83 c2 03 44 38 c2 7c 09 45 84 c0 0f 85 67 12 00 RSP: 0018:ffff88806cf09868 EFLAGS: 00000217 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 000000000000314a RDX: dffffc0000000000 RSI: 000000000000314a RDI: ffffffff85d78554 RBP: ffff88806cf09975 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9e1315 R12: ffff88806cf09988 R13: ffff88806cf09940 R14: 1ffff1100d9e1315 R15: ffffffff81314a77 FS: 00007fbe4e56a700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d325000 CR3: 00000000170cc000 CR4: 0000000000350ee0 Call Trace: arch_stack_walk+0x83/0xf0 arch/x86/kernel/stacktrace.c:25 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] __kmalloc_node_track_caller+0x1a6/0x3b0 mm/slub.c:4496 __kmalloc_reserve net/core/skbuff.c:143 [inline] __alloc_skb+0xb1/0x5b0 net/core/skbuff.c:211 __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:lock_release+0x3b4/0x680 kernel/locking/lockdep.c:5574 Code: 44 24 40 45 39 87 40 09 00 00 0f 85 a6 01 00 00 b8 ff ff ff ff 65 0f c1 05 39 30 db 7e 83 f8 01 0f 85 30 01 00 00 ff 34 24 9d <48> b8 00 00 00 00 00 fc ff df 48 01 c5 48 c7 45 00 00 00 00 00 c7 RSP: 0018:ffff88801aecfc68 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 68449c319683695e RCX: ffff88801aecfcb8 RDX: 1ffff110040897b7 RSI: 0000000000000000 RDI: ffff88802044bdb8 RBP: 1ffff110035d9f8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000003 R14: ffff88802044bdc0 R15: ffff88802044b480 local_lock_release include/linux/local_lock_internal.h:36 [inline] lru_cache_add+0x45c/0x800 mm/swap.c:474 do_anonymous_page mm/memory.c:3675 [inline] handle_pte_fault mm/memory.c:4495 [inline] __handle_mm_fault mm/memory.c:4632 [inline] handle_mm_fault+0x19c2/0x3500 mm/memory.c:4730 do_user_addr_fault+0x56e/0xc60 arch/x86/mm/fault.c:1345 handle_page_fault arch/x86/mm/fault.c:1402 [inline] exc_page_fault+0xa2/0x1a0 arch/x86/mm/fault.c:1458 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571 RIP: 0033:0x7fbe50f93059 Code: c4 a0 00 00 00 5d c3 66 2e 0f 1f 84 00 00 00 00 00 48 c7 c0 ff ff ff ff eb e4 0f 1f 80 00 00 00 00 55 53 48 81 ec 28 04 00 00 <48> 89 7c 24 18 48 89 74 24 10 48 89 54 24 08 48 8b 44 24 18 48 83 RSP: 002b:00007fbe4e569d40 EFLAGS: 00010202 RAX: 00007fbe50f93050 RBX: 00007fbe51107f60 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 000000000000000c RBP: 00007fbe5104ef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000000878d2 R12: 0000000000000000 R13: 00007ffeeba5e70f R14: 00007fbe4e56a300 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:706 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 39 d6 cmp %edx,%esi 2: 0f 83 0f 11 00 00 jae 0x1117 8: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx f: fc ff df 12: 89 f1 mov %esi,%ecx 14: 48 8d 3c 8d 2c c0 d6 lea -0x7a293fd4(,%rcx,4),%rdi 1b: 85 1c: 49 89 f8 mov %rdi,%r8 1f: 49 c1 e8 03 shr $0x3,%r8 23: 45 0f b6 04 10 movzbl (%r8,%rdx,1),%r8d * 28: 48 89 fa mov %rdi,%rdx <-- trapping instruction 2b: 83 e2 07 and $0x7,%edx 2e: 83 c2 03 add $0x3,%edx 31: 44 38 c2 cmp %r8b,%dl 34: 7c 09 jl 0x3f 36: 45 84 c0 test %r8b,%r8b 39: 0f .byte 0xf 3a: 85 67 12 test %esp,0x12(%rdi)