watchdog: BUG: soft lockup - CPU#0 stuck for 134s! [syz-executor0:4543] Modules linked in: irq event stamp: 61395488 hardirqs last enabled at (61395487): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (61395487): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (61395487): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (61395487): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (61395487): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (61395488): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (320700): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (320487): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (320487): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4543 Comm: syz-executor0 Not tainted 4.17.0-rc6+ #32 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:spin_lock include/linux/spinlock.h:310 [inline] RIP: 0010:d_walk+0x244/0xc80 fs/dcache.c:1250 RSP: 0018:ffff8801ab26f9f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801ab264580 RBX: ffffed003564df5a RCX: ffffffff81c70297 RDX: 0000000000000000 RSI: ffffffff81c6fc64 RDI: 0000000000000005 RBP: ffff8801ab26fb78 R08: ffff8801ab264580 R09: 0000000000000006 R10: ffff8801ab264580 R11: 0000000000000000 R12: 0000000000000466 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8801ab26fb50 FS: 0000000001459940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001462978 CR3: 00000001ab10f000 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:00007fff14c24f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff14c26d30 RDI: 00007fff14c26d30 RBP: 00007fff14c26d30 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000206 R12: 000000000145a940 R13: 0000000000000000 R14: 0000000000000102 R15: 00000000000129c4 Code: ff 48 89 df 57 9d 0f 1f 44 00 00 e8 a7 14 95 ff e9 17 06 00 00 e8 0d 3f b2 ff 48 c7 c7 68 26 c1 88 e8 b1 c7 ac 05 e8 fc 3e b2 ff <48> 8b 9d b8 fe ff ff 48 8d 83 80 00 00 00 48 89 c7 48 89 85 b0 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4546 Comm: syz-executor3 Not tainted 4.17.0-rc6+ #32 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_release kernel/locking/lockdep.c:3698 [inline] RIP: 0010:lock_release+0x308/0xa10 kernel/locking/lockdep.c:3939 RSP: 0018:ffff8801a07ef8b0 EFLAGS: 00000046 RAX: ffff8801a07e0ef0 RBX: 1ffff100340fdf1b RCX: 0000000000000000 RDX: 0000000000000003 RSI: ffffffff88c12648 RDI: ffff8801a07e0f12 RBP: ffff8801a07ef9e0 R08: 0000000000000000 R09: 0000000000000003 R10: ffffffff8a716a60 R11: 0000000000000004 R12: ffff8801a07ef9b8 R13: ffffffff88c12648 R14: ffff8801a07e0640 R15: ffff8801a07ef8f8 FS: 0000000000b2d940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004bae8a CR3: 00000001a0709000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: seqcount_lockdep_reader_access include/linux/seqlock.h:82 [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+0x1d5/0xc80 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:00007ffe99dd1058 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffe99dd2e00 RDI: 00007ffe99dd2e00 RBP: 00007ffe99dd2e00 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000202 R12: 0000000000b2e940 R13: 0000000000000000 R14: 0000000000000105 R15: 0000000000012985 Code: df 48 8d 78 22 48 89 f9 48 c1 e9 03 0f b6 0c 11 48 89 fa 83 e2 07 83 c2 01 38 ca 7c 08 84 c9 0f 85 c7 05 00 00 66 f7 40 22 f0 ff <74> 37 48 ba 00 00 00 00 00 fc ff df 48 8d 78 20 48 89 f9 48 c1