watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor6:4545] Modules linked in: irq event stamp: 20259926 hardirqs last enabled at (20259925): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (20259925): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (20259925): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (20259925): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (20259925): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (20259926): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (18720086): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (18720077): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (18720077): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4545 Comm: syz-executor6 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:ffff8801a15579f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a154e180 RBX: 0000000000000293 RCX: 1ffff100342a9d45 RDX: 0000000000000000 RSI: ffffffff81c6995b RDI: 0000000000000293 RBP: ffff8801a1557b78 R08: ffff8801a154e9b8 R09: 0000000000000006 R10: ffff8801a154e180 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff100342aaf82 R15: ffff8801a1557b50 FS: 00000000025ee940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff55938ffc CR3: 00000001a1578000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000020000000 DR3: 0000000020000000 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:00007ffd3c259418 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd3c25b1c0 RDI: 00007ffd3c25b1c0 RBP: 00007ffd3c25b1c0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000025ef940 R13: 0000000000000000 R14: 0000000000001282 R15: 00000000000c8c29 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: 4544 Comm: syz-executor3 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:write_comp_data+0x0/0x70 RSP: 0018:ffff8801a23679b8 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff81c694f7 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000005 RBP: ffff8801a23679e8 R08: ffff8801a235a140 R09: ffffed0032c0b9a4 R10: ffffed0032c0b9a4 R11: ffff88019605cd23 R12: ffffffff87d34500 R13: 0000000000000000 R14: 0000000000000005 R15: 0000000000000003 FS: 00000000027c5940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000027ce978 CR3: 00000001a233a000 CR4: 00000000001406e0 DR0: 0000000020000080 DR1: 0000000020000080 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 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:00007ffed63cc168 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffed63cdf10 RDI: 00007ffed63cdf10 RBP: 00007ffed63cdf10 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000027c6940 R13: 0000000000000000 R14: 0000000000000f1f R15: 00000000000c8c1a Code: 89 f7 e8 44 b7 3c 00 e9 86 fd ff ff 48 8b bd d0 fe ff ff e8 d3 b7 3c 00 e9 bd fc ff ff 4c 89 ef e8 26 b7 3c 00 e9 86 fc ff ff 90 <55> 65 4c 8b 04 25 c0 ed 01 00 65 8b 05 1f c0 88 7e 48 89 e5 a9