watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor0:4542] Modules linked in: irq event stamp: 10357426 hardirqs last enabled at (10357425): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (10357425): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (10357425): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (10357425): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (10357425): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (10357426): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (412682): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (412491): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (412491): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4542 Comm: syz-executor0 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:seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] RIP: 0010:read_seqcount_begin include/linux/seqlock.h:164 [inline] RIP: 0010:read_seqbegin include/linux/seqlock.h:433 [inline] RIP: 0010:read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] RIP: 0010:d_walk+0x840/0xc80 fs/dcache.c:1248 RSP: 0018:ffff8801a45cf9f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a45c24c0 RBX: 0000000000000293 RCX: 1ffff100348b85ad RDX: 0000000000000000 RSI: ffffffff81c6995b RDI: 0000000000000293 RBP: ffff8801a45cfb78 R08: ffff8801a45c2cf8 R09: 0000000000000006 R10: ffff8801a45c24c0 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff100348b9f82 R15: ffff8801a45cfb50 FS: 0000000001590940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd0b0450000 CR3: 00000001a4402000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 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:00007ffeb42a0868 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffeb42a2610 RDI: 00007ffeb42a2610 RBP: 00007ffeb42a2610 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000001591940 R13: 0000000000000000 R14: 000000000000015a R15: 0000000000014264 Code: 88 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 1e 04 00 00 48 83 3d 18 f2 0a 07 00 0f 84 29 02 00 00 e8 35 94 b2 ff 48 89 df 57 9d <0f> 1f 44 00 00 e8 26 94 b2 ff 49 8d 5f 80 48 c1 eb 03 4c 01 eb Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4545 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_save_flags arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:800 [inline] RIP: 0010:seqcount_lockdep_reader_access include/linux/seqlock.h:80 [inline] RIP: 0010:read_seqcount_begin include/linux/seqlock.h:164 [inline] RIP: 0010:read_seqbegin include/linux/seqlock.h:433 [inline] RIP: 0010:read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] RIP: 0010:d_walk+0x13a/0xc80 fs/dcache.c:1248 RSP: 0018:ffff8801a13079f8 EFLAGS: 00000246 RAX: 1ffffffff11a316c RBX: 0000000000000000 RCX: ffffffff81c6923a RDX: 0000000000000000 RSI: ffffffff81c69247 RDI: ffffffff88d18b60 RBP: ffff8801a1307b78 R08: ffff8801a12de540 R09: ffffed003537d018 R10: ffffed003537d018 R11: ffff8801a9be80c3 R12: ffff8801a1307c50 R13: dffffc0000000000 R14: 1ffff10034260f82 R15: ffff8801a1307b50 FS: 000000000182a940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001833978 CR3: 00000001a1345000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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:00007ffc6e36dfa8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffc6e36fd50 RDI: 00007ffc6e36fd50 RBP: 00007ffc6e36fd50 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 000000000182b940 R13: 0000000000000000 R14: 0000000000000155 R15: 0000000000014260 Code: ff 83 e3 01 89 de e8 66 9c b2 ff 85 db 0f 85 0c 01 00 00 e8 49 9b b2 ff 48 c7 c7 60 8b d1 88 48 89 f8 48 c1 e8 03 42 80 3c 28 00 <0f> 85 7d 0a 00 00 48 83 3d f8 f8 0a 07 00 0f 84 59 07 00 00 e8