watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor3:4550] Modules linked in: irq event stamp: 17556846 hardirqs last enabled at (17556845): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (17556845): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (17556845): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (17556845): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (17556845): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (17556846): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (8692404): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (8692015): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (8692015): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4550 Comm: syz-executor3 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:ffff8801a1a178d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10034342f20 RCX: 0000000000000000 RDX: 1ffffffff11a316d RSI: ffff8801aeee8a38 RDI: 0000000000000286 RBP: ffff8801a1a179c8 R08: 0000000000004a17 R09: 0000000000000003 R10: ffff8801aeee8ab0 R11: ffff8801aeee8200 R12: ffff8801aeee8200 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 00000000024c0940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000024c9978 CR3: 00000001a1978000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000020000000 DR3: 0000000020000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] d_walk+0x261/0xc80 fs/dcache.c:1250 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:00007ffc6ad1df28 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffc6ad1fcd0 RDI: 00007ffc6ad1fcd0 RBP: 00007ffc6ad1fcd0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000024c1940 R13: 0000000000000000 R14: 0000000000001183 R15: 00000000000a9115 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: 4554 Comm: syz-executor6 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:d_walk+0x53/0xc80 fs/dcache.c:1240 RSP: 0018:ffff88019d9979f8 EFLAGS: 00000286 RAX: ffffed0033b32f4e RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffffffff81c5f080 RSI: ffff88019d997c10 RDI: ffff8801b35a0080 RBP: ffff88019d997b78 R08: ffff88019d988100 R09: ffffed00366b4020 R10: ffffed00366b4020 R11: ffff8801b35a0103 R12: ffff88019d997c50 R13: ffff88019d997c10 R14: 1ffff10033b32f82 R15: ffff88019d997b50 FS: 0000000001a94940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001a9d978 CR3: 000000019d964000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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:00007fff1c089b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff1c08b920 RDI: 00007fff1c08b920 RBP: 00007fff1c08b920 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001a95940 R13: 0000000000000000 R14: 0000000000001123 R15: 00000000000a9104 Code: ec 58 01 00 00 48 89 85 98 fe ff ff 48 01 d8 48 89 bd b8 fe ff ff 48 89 b5 e0 fe ff ff 48 89 95 d8 fe ff ff 48 89 8d 88 fe ff ff <48> c7 85 f8 fe ff ff b3 8a b5 41 48 c7 85 00 ff ff ff 40 d6 9d