watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.7:5258] Modules linked in: irq event stamp: 4629031 hardirqs last enabled at (4629030): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4629031): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (4614460): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4614463): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 5258 Comm: syz-executor.7 Not tainted 5.10.226 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:30 [inline] RIP: 0010:__orc_find+0x6f/0xf0 arch/x86/kernel/unwind_orc.c:52 Code: 72 4d 4c 89 e0 48 29 e8 48 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 50 48 63 03 48 01 RSP: 0018:ffff88806ce09718 EFLAGS: 00000216 RAX: 1ffffffff0b28533 RBX: ffffffff85942998 RCX: ffffffff84001091 RDX: 0000000000000000 RSI: ffffffff85d425ae RDI: ffffffff85942964 RBP: ffffffff85942964 R08: ffffffff85d425ae R09: ffffffff85d42650 R10: 0000000000032042 R11: 1ffff1100d9c12f4 R12: ffffffff859429cc R13: ffffffff85942964 R14: ffffffff85942964 R15: dffffc0000000000 FS: 00007f1c4cc9f700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d522000 CR3: 000000004681c000 CR4: 0000000000350ef0 Call Trace: orc_find arch/x86/kernel/unwind_orc.c:178 [inline] unwind_next_frame+0x2b3/0x1a90 arch/x86/kernel/unwind_orc.c:448 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] kfree+0xd7/0x340 mm/slub.c:4125 skb_free_head net/core/skbuff.c:605 [inline] skb_release_data+0x604/0x820 net/core/skbuff.c:625 skb_release_all net/core/skbuff.c:679 [inline] __kfree_skb net/core/skbuff.c:693 [inline] consume_skb net/core/skbuff.c:849 [inline] consume_skb+0x110/0x2b0 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 __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:1094 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:__delete_object+0x25/0x100 mm/kmemleak.c:663 Code: 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 41 55 4c 8d 6f 40 41 54 4c 89 ea 55 48 c1 ea 03 48 89 fd 48 83 ec 08 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e ba 00 00 00 f6 45 40 01 0f 84 89 00 00 00 RSP: 0018:ffff88803bc2f9c8 EFLAGS: 00000292 RAX: 0000000000000000 RBX: ffff88800c6a9280 RCX: 1ffffffff0d12e82 RDX: 1ffff1100359f2fc RSI: 0000000000000000 RDI: ffff88801acf97a0 RBP: ffff88801acf97a0 R08: 0000000000000001 R09: ffffffff8686875f R10: fffffbfff0d0d0eb R11: 0000000000000001 R12: ffff88803bc2fa40 R13: ffff88801acf97e0 R14: ffff88800c6a9280 R15: ffff88801d77de10 kmemleak_free_recursive include/linux/kmemleak.h:49 [inline] slab_free_hook mm/slub.c:1517 [inline] slab_free_freelist_hook+0x13e/0x180 mm/slub.c:1576 slab_free mm/slub.c:3149 [inline] kmem_cache_free+0xa7/0x2d0 mm/slub.c:3165 journal_free_journal_head fs/jbd2/journal.c:2717 [inline] journal_release_journal_head fs/jbd2/journal.c:2844 [inline] jbd2_journal_put_journal_head+0x382/0x560 fs/jbd2/journal.c:2861 __jbd2_journal_remove_checkpoint+0x184/0x5f0 fs/jbd2/checkpoint.c:529 jbd2_log_do_checkpoint+0x31e/0xa00 fs/jbd2/checkpoint.c:286 jbd2_journal_flush+0x14b/0x530 fs/jbd2/journal.c:2304 __ext4_ioctl+0x2cd9/0x4190 fs/ext4/ioctl.c:949 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: 0033:0x7f1c4f729b19 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:00007f1c4cc9f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1c4f83cf60 RCX: 00007f1c4f729b19 RDX: 00000000200004c0 RSI: 0000000040086607 RDI: 0000000000000004 RBP: 00007f1c4f783f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd57754faf R14: 00007f1c4cc9f300 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: 72 4d jb 0x4f 2: 4c 89 e0 mov %r12,%rax 5: 48 29 e8 sub %rbp,%rax 8: 48 89 c2 mov %rax,%rdx b: 48 c1 e8 3f shr $0x3f,%rax f: 48 c1 fa 02 sar $0x2,%rdx 13: 48 01 d0 add %rdx,%rax 16: 48 d1 f8 sar %rax 19: 48 8d 5c 85 00 lea 0x0(%rbp,%rax,4),%rbx 1e: 48 89 d8 mov %rbx,%rax 21: 48 c1 e8 03 shr $0x3,%rax 25: 42 0f b6 14 38 movzbl (%rax,%r15,1),%edx * 2a: 48 89 d8 mov %rbx,%rax <-- trapping instruction 2d: 83 e0 07 and $0x7,%eax 30: 83 c0 03 add $0x3,%eax 33: 38 d0 cmp %dl,%al 35: 7c 04 jl 0x3b 37: 84 d2 test %dl,%dl 39: 75 50 jne 0x8b 3b: 48 63 03 movslq (%rbx),%rax 3e: 48 rex.W 3f: 01 .byte 0x1