watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.5:5131] Modules linked in: irq event stamp: 5293013 hardirqs last enabled at (5293012): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (5293013): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (5275678): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (5275681): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 5131 Comm: syz-executor.5 Not tainted 5.10.230 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__list_del include/linux/list.h:113 [inline] RIP: 0010:__list_del_entry include/linux/list.h:135 [inline] RIP: 0010:skb_list_del_init include/linux/skbuff.h:1516 [inline] RIP: 0010:__netif_receive_skb_list_core+0x2bd/0x8e0 net/core/dev.c:5469 Code: 00 00 48 8d 7a 08 4d 8b 7e 08 48 89 f9 48 c1 e9 03 80 3c 19 00 0f 85 cd 04 00 00 4c 89 f9 4c 89 7a 08 48 c1 e9 03 80 3c 19 00 <0f> 85 a1 04 00 00 8b 74 24 24 48 8b 7c 24 28 49 89 17 49 c7 06 00 RSP: 0018:ffff88806cf09bd8 EFLAGS: 00000246 RAX: 1ffff11008503f69 RBX: dffffc0000000000 RCX: 1ffff1100d9e13d1 RDX: ffff88806cf09e88 RSI: ffffffff831a7d73 RDI: ffff88806cf09e90 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8686a6e7 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88806cf09c88 R13: ffff88806cf09e88 R14: ffff88804281fb40 R15: ffff88806cf09e88 FS: 00007fa0b9c12700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0aa493ef80 CR3: 000000004a1fa000 CR4: 0000000000350ee0 Call Trace: __netif_receive_skb_list net/core/dev.c:5537 [inline] netif_receive_skb_list_internal+0x6ca/0xcd0 net/core/dev.c:5647 netif_receive_skb_list+0x54/0x370 net/core/dev.c:5699 ieee80211_rx_napi+0x35a/0x3c0 net/mac80211/rx.c:4871 ieee80211_rx include/net/mac80211.h:4502 [inline] ieee80211_tasklet_handler+0xd3/0x130 net/mac80211/main.c:235 tasklet_action_common.constprop.0+0x244/0x2f0 kernel/softirq.c:560 __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:__schedule+0x1/0x1ea0 kernel/sched/core.c:4428 Code: 39 00 e8 b2 e6 85 fd eb d5 e8 ab e6 85 fd e9 49 ff ff ff e8 51 e6 85 fd e9 02 ff ff ff e8 77 e6 85 fd e9 6a ff ff ff 66 90 55 <48> 89 e5 41 57 41 56 48 8d 85 78 ff ff ff 49 c7 c6 c0 b2 03 00 41 RSP: 0018:ffff88804941f498 EFLAGS: 00000202 RAX: dffffc0000000000 RBX: ffff888048e1b480 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff84ff98a0 RDI: 0000000000000001 RBP: ffffed10091c3690 R08: 0000000000000000 R09: ffff88801d68cc03 R10: 0000000000000000 R11: 0000000000000001 R12: 00000000000000a0 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88804941f628 preempt_schedule_common kernel/sched/core.c:4704 [inline] _cond_resched+0x49/0x80 kernel/sched/core.c:6127 __ext4_handle_dirty_metadata+0x3c/0x720 fs/ext4/ext4_jbd2.c:328 ext4_do_update_inode fs/ext4/inode.c:5256 [inline] ext4_mark_iloc_dirty+0x1976/0x3630 fs/ext4/inode.c:5841 __ext4_mark_inode_dirty+0x20a/0x770 fs/ext4/inode.c:6043 __ext4_ext_dirty+0x1ce/0x240 fs/ext4/extents.c:182 ext4_ext_rm_leaf fs/ext4/extents.c:2720 [inline] ext4_ext_remove_space+0x12f4/0x3d90 fs/ext4/extents.c:2932 ext4_ext_truncate+0x1ea/0x250 fs/ext4/extents.c:4465 ext4_truncate+0xc38/0x1160 fs/ext4/inode.c:4335 ext4_evict_inode+0xae0/0x1a60 fs/ext4/inode.c:289 evict+0x32b/0x8c0 fs/inode.c:612 iput_final fs/inode.c:1736 [inline] iput.part.0+0x4b9/0x6d0 fs/inode.c:1762 iput+0x58/0x70 fs/inode.c:1752 dentry_unlink_inode+0x2bb/0x470 fs/dcache.c:378 __dentry_kill+0x36f/0x5c0 fs/dcache.c:583 dentry_kill fs/dcache.c:721 [inline] dput+0x6f4/0xcd0 fs/dcache.c:883 do_renameat2+0x715/0xbf0 fs/namei.c:4548 __do_sys_rename fs/namei.c:4595 [inline] __se_sys_rename fs/namei.c:4593 [inline] __x64_sys_rename+0x7d/0xa0 fs/namei.c:4593 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7fa0bc69cb19 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:00007fa0b9c12188 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007fa0bc7aff60 RCX: 00007fa0bc69cb19 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000020000180 RBP: 00007fa0bc6f6f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff02acfa8f R14: 00007fa0b9c12300 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): 0: 00 00 add %al,(%rax) 2: 48 8d 7a 08 lea 0x8(%rdx),%rdi 6: 4d 8b 7e 08 mov 0x8(%r14),%r15 a: 48 89 f9 mov %rdi,%rcx d: 48 c1 e9 03 shr $0x3,%rcx 11: 80 3c 19 00 cmpb $0x0,(%rcx,%rbx,1) 15: 0f 85 cd 04 00 00 jne 0x4e8 1b: 4c 89 f9 mov %r15,%rcx 1e: 4c 89 7a 08 mov %r15,0x8(%rdx) 22: 48 c1 e9 03 shr $0x3,%rcx 26: 80 3c 19 00 cmpb $0x0,(%rcx,%rbx,1) * 2a: 0f 85 a1 04 00 00 jne 0x4d1 <-- trapping instruction 30: 8b 74 24 24 mov 0x24(%rsp),%esi 34: 48 8b 7c 24 28 mov 0x28(%rsp),%rdi 39: 49 89 17 mov %rdx,(%r15) 3c: 49 rex.WB 3d: c7 .byte 0xc7 3e: 06 (bad)