tmpfs: No value for mount option 'M' watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor4:4545] Modules linked in: irq event stamp: 10116948 hardirqs last enabled at (10116947): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (10116947): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (10116947): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (10116947): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (10116947): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (10116948): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (417010): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (416815): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (416815): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4545 Comm: syz-executor4 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:94 RSP: 0018:ffff8801a0f2f9e8 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81c69b47 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff8801a0f2fb78 R08: ffff8801a0f26140 R09: ffffed003b5c46c2 R10: ffffed003b5c46c2 R11: ffff8801dae23613 R12: ffff8801ce727580 R13: dffffc0000000000 R14: ffff8801ce7276e0 R15: ffff8801a0f2fb50 FS: 00000000013a9940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe82cb39878 CR3: 00000001a0e0c000 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:00007fff803896c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff8038b470 RDI: 00007fff8038b470 RBP: 00007fff8038b470 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000013aa940 R13: 0000000000000000 R14: 0000000000000140 R15: 00000000000133ac Code: 14 dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 5d c3 66 90 55 <65> 48 8b 04 25 c0 ed 01 00 65 8b 15 af bf 88 7e 48 89 e5 81 e2 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4551 Comm: syz-executor7 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0x17/0x5140 kernel/locking/lockdep.c:3290 RSP: 0018:ffff88019d2df8b0 EFLAGS: 00000002 RAX: 0000000000000000 RBX: 1ffff10033a5bf23 RCX: 0000000000000002 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88c12648 RBP: ffff88019d2df8c0 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: ffff88019d2d42c0 R12: ffff88019d2d42c0 R13: 0000000000000002 R14: 0000000000000002 R15: ffffffff88c12648 FS: 00000000014ba940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000014c3978 CR3: 000000019d2be000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 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:00007ffdc54b9d38 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffdc54bbae0 RDI: 00007ffdc54bbae0 RBP: 00007ffdc54bbae0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000014bb940 R13: 0000000000000000 R14: 0000000000000144 R15: 00000000000133dc Code: 20 48 59 00 e9 48 ff ff ff 90 66 2e 0f 1f 84 00 00 00 00 00 55 65 4c 8b 1c 25 c0 ed 01 00 48 89 e5 41 57 49 89 ff 41 56 41 89 ce <41> 55 41 89 d5 48 ba 00 00 00 00 00 fc ff df 41 54 45 89 cc 53