watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor0:4513] Modules linked in: irq event stamp: 9072530 hardirqs last enabled at (9072529): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (9072529): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (9072529): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (9072529): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (9072529): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (9072530): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (706160): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (706015): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (706015): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4513 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:ffff8801b42df9f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801b41e4540 RBX: 0000000000000293 RCX: 1ffff1003683c9bd RDX: 0000000000000000 RSI: ffffffff81c6995b RDI: 0000000000000293 RBP: ffff8801b42dfb78 R08: ffff8801b41e4d78 R09: 0000000000000006 R10: ffff8801b41e4540 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff1003685bf82 R15: ffff8801b42dfb50 FS: 0000000001339940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd33a8cfc0 CR3: 00000001a1faa000 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:00007ffd04a4dd08 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd04a4fab0 RDI: 00007ffd04a4fab0 RBP: 00007ffd04a4fab0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 000000000133a940 R13: 0000000000000000 R14: 00000000000001e7 R15: 000000000001e142 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: 4515 Comm: syz-executor5 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:select_collect+0xc5/0x5f0 fs/dcache.c:1450 RSP: 0018:ffff8801a1627908 EFLAGS: 00000246 RAX: 00000000000804c0 RBX: 1ffff100342c4f24 RCX: ffffffff815e0571 RDX: 1ffff10037004518 RSI: ffffffff81c5f120 RDI: ffff8801a1627c10 RBP: ffff8801a16279e8 R08: ffffed0037004529 R09: ffffed0037004528 R10: ffffed0037004528 R11: ffff8801b8022943 R12: ffff8801a1627c10 R13: ffff8801b80228c0 R14: dffffc0000000000 R15: ffff8801a16279c0 FS: 0000000000d5f940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000725f18 CR3: 00000001a15e1000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x3c3/0xc80 fs/dcache.c:1276 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:00007ffd9b48db78 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd9b48f920 RDI: 00007ffd9b48f920 RBP: 00007ffd9b48f920 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000000d60940 R13: 0000000000000000 R14: 000000000000022c R15: 000000000001e135 Code: 00 e8 70 3c b3 ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e e0 03 00 00 41 8b 45 00 <31> ff 4d 8d 74 24 08 89 85 28 ff ff ff 25 00 04 00 00 89 c6 89