watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.6:12256] Modules linked in: irq event stamp: 97365554 hardirqs last enabled at (97365553): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (97365553): [] _raw_spin_unlock_irqrestore+0x34/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (97365554): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (70968): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (70951): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 12256 Comm: syz-executor.6 Not tainted 5.10.109 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:__preempt_count_sub arch/x86/include/asm/preempt.h:84 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x40 kernel/locking/spinlock.c:191 Code: 80 00 00 00 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 7a eb 47 fd 48 89 ef e8 62 a2 48 fd f6 c7 02 75 0c 53 9d <65> ff 0d c4 b2 23 7c 5b 5d c3 e8 9c 32 67 fd eb ed 66 2e 0f 1f 84 RSP: 0018:ffff888040217d88 EFLAGS: 00000206 RAX: 0000000005cdae31 RBX: 0000000000000206 RCX: 1ffffffff0a8e199 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83debc84 RBP: ffff88800eccb450 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff88800eccb000 R14: ffff88800eccb450 R15: ffff88800eccb000 FS: 00007f7f4d6f2700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d022000 CR3: 00000000403fc000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: io_cqring_wait fs/io_uring.c:7077 [inline] __do_sys_io_uring_enter+0xded/0x1900 fs/io_uring.c:9145 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f7f5017cb19 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:00007f7f4d6f2188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f7f5028ff60 RCX: 00007f7f5017cb19 RDX: 00000000fffffffb RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f7f501d6f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffde7fcbb0f R14: 00007f7f4d6f2300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: writeback Not tainted 5.10.109 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Workqueue: writeback wb_workfn (flush-9p-11) RIP: 0010:__sanitizer_cov_trace_pc+0x30/0x60 kernel/kcov.c:197 Code: 8b 14 25 80 6f 02 00 65 8b 05 1c c0 c2 7e a9 00 01 ff 00 74 0f f6 c4 01 74 35 8b 82 64 13 00 00 85 c0 74 2b 8b 82 40 13 00 00 <83> f8 02 75 20 48 8b 8a 48 13 00 00 8b 92 44 13 00 00 48 8b 01 48 RSP: 0018:ffff888008e2fcc8 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff888007c61920 RCX: ffffffff811a6b2c RDX: ffff88800867e500 RSI: ffffffff811a6c34 RDI: ffff888008cf5e90 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888008e2fd50 R13: ffff888007c7a600 R14: ffff888007c61800 R15: ffff888008cf5e00 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020014038 CR3: 000000000f2aa000 CR4: 0000000000350ee0 Call Trace: process_one_work+0xbe4/0x1590 kernel/workqueue.c:2318 process_scheduled_works kernel/workqueue.c:2341 [inline] rescuer_thread+0x6b5/0xe40 kernel/workqueue.c:2532 kthread+0x38f/0x470 kernel/kthread.c:313 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:296 BUG: workqueue lockup - pool cpus=0-1 flags=0x5 nice=0 stuck for 30s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 refcnt=3 pending: e1000_watchdog, vmstat_shepherd workqueue events_unbound: flags=0x2 pwq 4: cpus=0-1 flags=0x5 nice=0 active=9/512 refcnt=11 in-flight: 7:io_ring_exit_work, 332:io_ring_exit_work, 317:io_ring_exit_work, 6554:io_ring_exit_work, 4050:io_ring_exit_work, 65:io_ring_exit_work, 7496:io_ring_exit_work, 324:io_ring_exit_work, 59:io_ring_exit_work workqueue events_power_efficient: flags=0x80 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: do_cache_clean workqueue events_freezable_power_: flags=0x84 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: disk_events_workfn workqueue writeback: flags=0x4a pwq 4: cpus=0-1 flags=0x5 nice=0 active=3/256 refcnt=6 in-flight: 24(RESCUER):wb_workfn wb_workfn pending: wb_workfn workqueue kblockd: flags=0x18 pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=2/256 refcnt=3 pending: blk_mq_timeout_work, blk_mq_timeout_work workqueue ext4-rsv-conversion: flags=0x2000a pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=3 pending: ext4_end_io_rsv_work workqueue phy2: flags=0xa0002 pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work workqueue phy3: flags=0xa0002 pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work workqueue phy4: flags=0xa0002 pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work workqueue phy5: flags=0xa0002 pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=3 in-flight: 64:ieee80211_iface_work workqueue phy7: flags=0xa0002 pwq 4: cpus=0-1 flags=0x5 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work workqueue phy9: flags=0xa0002 pwq 4: cpus=0-1 flags=0x5 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work workqueue phy10: flags=0xa0002 pwq 4: cpus=0-1 flags=0x5 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work workqueue phy11: flags=0xa0002 pwq 4: cpus=0-1 flags=0x5 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work workqueue phy12: flags=0xa0002 pwq 4: cpus=0-1 flags=0x5 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work workqueue phy13: flags=0xa0002 pwq 4: cpus=0-1 flags=0x5 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work workqueue phy14: flags=0xa0002 pwq 4: cpus=0-1 flags=0x5 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work workqueue phy15: flags=0xa0002 pwq 4: cpus=0-1 flags=0x5 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work workqueue phy30: flags=0xa0002 pwq 4: cpus=0-1 flags=0x5 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work workqueue phy31: flags=0xa0002 pwq 4: cpus=0-1 flags=0x5 nice=0 active=1/1 refcnt=3 pending: ieee80211_iface_work pool 4: cpus=0-1 flags=0x5 nice=0 hung=0s workers=11 manager: 12288 EXT4-fs (loop7): bad geometry: block count 128 exceeds size of device (8 blocks) ---------------- Code disassembly (best guess): 0: 80 00 00 addb $0x0,(%rax) 3: 00 00 add %al,(%rax) 5: 55 push %rbp 6: 48 89 fd mov %rdi,%rbp 9: 48 83 c7 18 add $0x18,%rdi d: 53 push %rbx e: 48 89 f3 mov %rsi,%rbx 11: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 16: e8 7a eb 47 fd callq 0xfd47eb95 1b: 48 89 ef mov %rbp,%rdi 1e: e8 62 a2 48 fd callq 0xfd48a285 23: f6 c7 02 test $0x2,%bh 26: 75 0c jne 0x34 28: 53 push %rbx 29: 9d popfq * 2a: 65 ff 0d c4 b2 23 7c decl %gs:0x7c23b2c4(%rip) # 0x7c23b2f5 <-- trapping instruction 31: 5b pop %rbx 32: 5d pop %rbp 33: c3 retq 34: e8 9c 32 67 fd callq 0xfd6732d5 39: eb ed jmp 0x28 3b: 66 data16 3c: 2e cs 3d: 0f .byte 0xf 3e: 1f (bad) 3f: 84 .byte 0x84