9pnet_virtio: no channels available for device ./file0 watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor1:4544] Modules linked in: irq event stamp: 16205804 hardirqs last enabled at (16205803): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (16205803): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (16205803): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (16205803): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (16205803): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (16205804): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (10046014): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (10045811): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (10045811): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4544 Comm: syz-executor1 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline] RIP: 0010:lock_acquire+0x257/0x520 kernel/locking/lockdep.c:3923 RSP: 0018:ffff8801a2f8f8d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff100345f1f20 RCX: 0000000000000000 RDX: 1ffffffff11a316d RSI: ffff8801a2f86eb8 RDI: 0000000000000286 RBP: ffff8801a2f8f9c8 R08: 0000000000001511 R09: 0000000000000004 R10: ffff8801a2f86f58 R11: ffff8801a2f86680 R12: ffff8801a2f86680 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000d50940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000d59978 CR3: 00000001a2e1e000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: _raw_spin_lock_nested+0x28/0x40 kernel/locking/spinlock.c:354 d_walk+0x3ad/0xc80 fs/dcache.c:1274 shrink_dcache_parent+0x179/0x230 fs/dcache.c:1486 vfs_rmdir+0x202/0x470 fs/namei.c:3850 do_rmdir+0x523/0x610 fs/namei.c:3911 __do_sys_rmdir fs/namei.c:3929 [inline] __se_sys_rmdir fs/namei.c:3927 [inline] __x64_sys_rmdir+0x36/0x40 fs/namei.c:3927 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455777 RSP: 002b:00007ffc8249eb68 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffc824a0910 RDI: 00007ffc824a0910 RBP: 00007ffc824a0910 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000000d51940 R13: 0000000000000000 R14: 0000000000000588 R15: 00000000000429ac Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 02 00 00 48 83 3d e0 7c 74 07 00 0f 84 c8 01 00 00 48 8b bd 20 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4543 Comm: syz-executor7 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:do_raw_spin_unlock+0x20e/0x2e0 kernel/locking/spinlock_debug.c:133 RSP: 0018:ffff8801a407f948 EFLAGS: 00000282 RAX: dffffc0000000000 RBX: ffff88019d7457a0 RCX: ffffffff815e08fe RDX: 1ffffffff11a3189 RSI: 0000000000000004 RDI: ffff88019d7457a0 RBP: ffff8801a407f9d0 R08: ffffed0033ae8af5 R09: ffffed0033ae8af4 R10: ffffed0033ae8af4 R11: ffff88019d7457a3 R12: ffffed003480ff29 R13: ffff88019d7457b0 R14: ffff88019d7457a8 R15: 0000000000000001 FS: 00000000014d2940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff8d345ff8 CR3: 00000001a4006000 CR4: 00000000001406e0 DR0: 0000000020000080 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_unlock include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock+0x22/0x30 kernel/locking/spinlock.c:176 spin_unlock include/linux/spinlock.h:350 [inline] d_walk+0x451/0xc80 fs/dcache.c:1298 shrink_dcache_parent+0x179/0x230 fs/dcache.c:1486 vfs_rmdir+0x202/0x470 fs/namei.c:3850 do_rmdir+0x523/0x610 fs/namei.c:3911 __do_sys_rmdir fs/namei.c:3929 [inline] __se_sys_rmdir fs/namei.c:3927 [inline] __x64_sys_rmdir+0x36/0x40 fs/namei.c:3927 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455777 RSP: 002b:00007fff8d3467d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff8d348580 RDI: 00007fff8d348580 RBP: 00007fff8d348580 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000014d3940 R13: 0000000000000000 R14: 00000000000005ac R15: 00000000000429b7 Code: 00 00 48 83 3d fb 81 73 07 00 74 7f 48 89 df c6 07 00 0f 1f 40 00 48 b8 00 00 00 00 00 fc ff df 49 01 c4 49 c7 04 24 00 00 00 00 <41> c7 44 24 08 00 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e 41