MINIX-fs: bad superblock or unable to read bitmaps watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.2:2525] Modules linked in: irq event stamp: 5605669 hardirqs last enabled at (5605668): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (5605669): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (5377350): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (5377353): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (5377353): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 2525 Comm: syz-executor.2 Not tainted 4.19.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_release+0x81/0x8b0 kernel/locking/lockdep.c:3920 Code: 02 f1 f1 f1 f1 c7 42 04 04 f3 f3 f3 48 89 fa 65 48 8b 34 25 28 00 00 00 48 89 74 24 70 31 f6 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 d0 05 00 00 44 8b 93 84 RSP: 0018:ffff8880ba007c78 EFLAGS: 00000a03 ORIG_RAX: ffffffffffffff13 RAX: ffff88808cc76e84 RBX: ffff88808cc76600 RCX: ffffffff81538ad9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88808cc76e84 RBP: ffff8880ba007d58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff11017400f92 R13: ffffffff81538785 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fe0ed47d700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fc28000 CR3: 000000009bbb7000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: call_timer_fn+0x1de/0x700 kernel/time/timer.c:1341 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:chroot_fs_refs+0xee/0x580 fs/fs_struct.c:66 Code: ab 80 fa ff ff 4c 3b 6d d0 0f 84 87 01 00 00 e8 48 9c b2 ff 4d 8d a5 90 07 00 00 4c 89 e7 e8 59 eb 68 06 49 8d bd e8 06 00 00 <48> 89 f8 48 c1 e8 03 42 80 3c 30 00 0f 85 4d 03 00 00 49 8b 9d e8 RSP: 0018:ffff888011b2fcf0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff888095c0e850 RCX: ffffffff814bdcab RDX: 1ffff11009276104 RSI: 0000000000000004 RDI: ffff8880493b0768 RBP: ffff888011b2fd78 R08: 0000000000000001 R09: ffffed1009276102 R10: ffff8880493b0813 R11: 0000000000000000 R12: ffff8880493b0810 R13: ffff8880493b0080 R14: dffffc0000000000 R15: 0000000000000000 __do_sys_pivot_root fs/namespace.c:3162 [inline] __se_sys_pivot_root+0xc8d/0x11c0 fs/namespace.c:3082 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 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:00007fe0ed47d188 EFLAGS: 00000246 ORIG_RAX: 000000000000009b RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000020000340 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffec32b98ef R14: 00007fe0ed47d300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2569 Comm: loop3 Not tainted 4.19.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:261 [inline] RIP: 0010:queued_write_lock_slowpath+0x11f/0x290 kernel/locking/qrwlock.c:88 Code: 03 41 83 e7 07 4c 8d 2c 02 41 83 c7 03 41 0f b6 45 00 41 38 c7 7c 08 84 c0 0f 85 34 01 00 00 8b 03 3d 00 01 00 00 74 1a f3 90 <41> 0f b6 45 00 41 38 c7 7c eb 84 c0 74 e7 48 89 df e8 7b 53 4c 00 RSP: 0018:ffff88801d877d28 EFLAGS: 00000006 RAX: 0000000000000300 RBX: ffffffff89e09080 RCX: ffffffff814bfcb6 RDX: 1ffffffff13c1210 RSI: 0000000000000004 RDI: ffffffff89e09080 RBP: 1ffff11003b0efa6 R08: 0000000000000001 R09: fffffbfff13c1210 R10: ffffffff89e09083 R11: 0000000000000000 R12: ffffffff89e09084 R13: fffffbfff13c1210 R14: ffff88801d877d50 R15: 0000000000000003 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30221000 CR3: 0000000046115000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: queued_write_lock include/asm-generic/qrwlock.h:103 [inline] do_raw_write_lock+0xcf/0x1e0 kernel/locking/spinlock_debug.c:203 exit_notify kernel/exit.c:715 [inline] do_exit+0xc41/0x2be0 kernel/exit.c:890 kthread+0x2f9/0x460 kernel/kthread.c:261 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415