watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor5:4556] Modules linked in: irq event stamp: 15940102 hardirqs last enabled at (15940101): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (15940101): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (15940101): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (15940101): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (15940101): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (15940102): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (14012030): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (14011963): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (14011963): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4556 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: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:ffff88019ed379f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88019ed286c0 RBX: 0000000000000293 RCX: 1ffff10033da51ed RDX: 0000000000000000 RSI: ffffffff81c6995b RDI: 0000000000000293 RBP: ffff88019ed37b78 R08: ffff88019ed28ef8 R09: 0000000000000006 R10: ffff88019ed286c0 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff10033da6f82 R15: ffff88019ed37b50 FS: 0000000001e48940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fa22000 CR3: 000000019ed02000 CR4: 00000000001406f0 DR0: 0000000000000000 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:00007ffd33ae4ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd33ae6c90 RDI: 00007ffd33ae6c90 RBP: 00007ffd33ae6c90 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001e49940 R13: 0000000000000000 R14: 0000000000000229 R15: 0000000000022e08 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: 4557 Comm: syz-executor2 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:perf_trace_lock_acquire+0x8e/0x980 include/trace/events/lock.h:13 RSP: 0018:ffff88019eb8f6f8 EFLAGS: 00000082 RAX: ffffed0033d71ee9 RBX: 1ffff10033d71ee9 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff88c12648 RDI: ffffffff88d77120 RBP: ffff88019eb8f8d0 R08: 0000000000000002 R09: ffffffff88c12648 R10: ffffffff815bf400 R11: dffffc0000000000 R12: ffff88019eb8f8a8 R13: 0000000000000002 R14: 0000000000000001 R15: ffffffff88d77120 FS: 000000000109b940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000093002d CR3: 000000019eb2d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x38e/0x520 kernel/locking/lockdep.c:3919 seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] read_seqbegin include/linux/seqlock.h:433 [inline] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] d_walk+0x1c0/0xc80 fs/dcache.c:1248 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:00007ffc20f68f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffc20f6ad20 RDI: 00007ffc20f6ad20 RBP: 00007ffc20f6ad20 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 000000000109c940 R13: 0000000000000000 R14: 0000000000000238 R15: 0000000000022e03 Code: ff ff c7 00 f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 c7 40 08 f2 f2 f2 f2 c7 40 0c 04 f2 f2 f2 c7 40 10 f2 f2 f2 f2 c7 40 14 00 f2 f2 f2 40 18 f2 f2 f2 f2 c7 40 1c 00 f2 f2 f2 c7 40 20 f2 f2 f2 f2