syz-executor1 (7034) used greatest stack depth: 17128 bytes left syz-executor1 (6977) used greatest stack depth: 16632 bytes left watchdog: BUG: soft lockup - CPU#0 stuck for 134s! [syz-executor1:4558] Modules linked in: irq event stamp: 94824864 hardirqs last enabled at (94824863): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (94824863): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (94824863): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (94824863): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (94824863): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (94824864): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (523578): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (523321): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (523321): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4558 Comm: syz-executor1 Not tainted 4.17.0-rc6+ #33 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:write_comp_data+0x0/0x70 RSP: 0018:ffff88019de1f9b8 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000020 RBX: 0000000000000001 RCX: ffffffff81c6ff47 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000005 RBP: ffff88019de1f9e8 R08: ffff88019de14680 R09: ffffed00366427c8 R10: ffffed00366427c8 R11: ffff8801b3213e43 R12: ffffffff87d35a00 R13: 0000000000000000 R14: 0000000000000005 R15: 0000000000000003 FS: 0000000000e64940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30522000 CR3: 000000019dcd4000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x3d7/0xc80 fs/dcache.c:1277 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:00007ffdaaed85d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffdaaed9740 RDI: 00007ffdaaed9740 RBP: 00007ffdaaed9740 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000005 R11: 0000000000000206 R12: 0000000000e6d980 R13: 0000000000000000 R14: 0000000000000119 R15: 0000000000012189 Code: 89 f7 e8 14 10 3d 00 e9 86 fd ff ff 48 8b bd d0 fe ff ff e8 a3 10 3d 00 e9 bd fc ff ff 4c 89 ef e8 f6 0f 3d 00 e9 86 fc ff ff 90 <55> 65 4c 8b 04 25 40 ee 01 00 65 8b 05 cf b2 88 7e 48 89 e5 a9 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4557 Comm: syz-executor3 Not tainted 4.17.0-rc6+ #33 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0x1fd/0x5140 kernel/locking/lockdep.c:3290 RSP: 0018:ffff8801a03bf520 EFLAGS: 00000006 RAX: 0000000000000000 RBX: ffffffff89c30568 RCX: 0000000000000000 RDX: 1ffff10035d2dd86 RSI: ffff8801ae96ec38 RDI: ffffed0034077f10 RBP: ffff8801a03bf8a8 R08: 0000000000002cb5 R09: 0000000000000004 R10: ffff8801ae96ecd8 R11: ffff8801ae96e400 R12: 1ffff10034077ecc R13: 0000000000000000 R14: 88bc9310708f0d52 R15: 0000000000000001 FS: 00000000017de940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000017e7978 CR3: 00000001a0361000 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 _raw_spin_lock_nested+0x28/0x40 kernel/locking/spinlock.c:354 d_walk+0x3ad/0xc80 fs/dcache.c:1274 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:00007ffe3b8f4878 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffe3b8f6620 RDI: 00007ffe3b8f6620 RBP: 00007ffe3b8f6620 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000017df940 R13: 0000000000000000 R14: 0000000000000119 R15: 00000000000125a6 Code: 48 03 8c 24 98 00 00 00 48 8d 79 08 48 c7 01 00 00 00 00 48 83 e7 f8 48 c7 41 50 00 00 00 00 48 29 f9 83 c1 58 c1 e9 03 f3 48 ab <48> 8d 65 d8 44 89 f8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00