watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor2:4564] Modules linked in: irq event stamp: 19858060 hardirqs last enabled at (19858059): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (19858059): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (19858059): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (19858059): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (19858059): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (19858060): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (6290066): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (6290001): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (6290001): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4564 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:__write_once_size include/linux/compiler.h:215 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4b/0x50 kernel/kcov.c:109 RSP: 0018:ffff88019f63f8f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88019f630600 RBX: 1ffff10033ec7f24 RCX: ffffffff81c5f164 RDX: 0000000000000000 RSI: ffffffff81c5f1f5 RDI: ffff88019f63fc28 RBP: ffff88019f63f8f8 R08: ffff88019f630600 R09: ffffed0039c5a678 R10: ffffed0039c5a678 R11: ffff8801ce2d33c3 R12: ffff88019f63fc10 R13: ffff8801ce2d3340 R14: ffff88019f63fc18 R15: ffff88019f63f9c0 FS: 00000000013d9940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000013e2978 CR3: 000000019f601000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 00000000200001c0 DR2: 00000000200001c0 DR3: 00000000200001c0 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: list_empty include/linux/list.h:203 [inline] select_collect+0x175/0x5f0 fs/dcache.c:1465 d_walk+0x3c3/0xc80 fs/dcache.c:1276 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:00007ffd850cadb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd850ccb60 RDI: 00007ffd850ccb60 RBP: 00007ffd850ccb60 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000013da940 R13: 0000000000000000 R14: 0000000000000d2d R15: 0000000000085ec4 Code: 8b 90 78 12 00 00 83 fa 02 75 20 48 8b 88 80 12 00 00 8b 80 7c 12 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 <5d> c3 0f 1f 00 55 40 0f b6 d6 40 0f b6 f7 31 ff 48 89 e5 48 8b Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4568 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:list_empty include/linux/list.h:203 [inline] RIP: 0010:select_collect+0x1d7/0x5f0 fs/dcache.c:1465 RSP: 0018:ffff88019d43f908 EFLAGS: 00000a06 RAX: dffffc0000000000 RBX: 1ffff10033a87f24 RCX: ffffffff81c5f164 RDX: 1ffff10033a87f28 RSI: ffffffff81c5f1f5 RDI: ffff88019d43fc28 RBP: ffff88019d43f9e8 R08: ffff88019d436700 R09: ffffed003932bfd0 R10: ffffed003932bfd0 R11: ffff8801c995fe83 R12: ffff88019d43fc18 R13: 1ffff10033a87f28 R14: ffff88019d43fc18 R15: dffffc0000000000 FS: 0000000002091940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000209a978 CR3: 000000019d417000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: d_walk+0x3c3/0xc80 fs/dcache.c:1276 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:00007ffe4dd62ea8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffe4dd64c50 RDI: 00007ffe4dd64c50 RBP: 00007ffe4dd64c50 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000002092940 R13: 0000000000000000 R14: 0000000000000db9 R15: 0000000000085ec5 Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 15 03 00 00 4d 89 67 80 49 c1 ed 03 49 bf 00 00 00 00 00 fc ff df 43 c6 44 3d 00 f8 <4d> 39 e6 0f 84 b8 00 00 00 e8 2b 3b b3 ff 65 4c 8b 24 25 c0 ed