watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor1:4541] Modules linked in: irq event stamp: 9215562 hardirqs last enabled at (9215561): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (9215561): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (9215561): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (9215561): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (9215561): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (9215562): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (1182044): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (1181985): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (1181985): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4541 Comm: syz-executor1 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:d_walk+0x46a/0xc80 fs/dcache.c:1266 RSP: 0018:ffff8801a0b279f8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a0b18480 RBX: ffff8801c9bf5100 RCX: ffffffff815e08fe RDX: 0000000000000000 RSI: ffffffff81c6957d RDI: ffff8801adfe90c0 RBP: ffff8801a0b27b78 R08: ffffed0035bfd219 R09: ffffed0035bfd218 R10: ffffed0035bfd218 R11: ffff8801adfe90c3 R12: ffff8801adfe9040 R13: dffffc0000000000 R14: ffff8801adfe90c0 R15: ffff8801a0b27b50 FS: 0000000001087940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001090978 CR3: 00000001a0ad7000 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:00007ffd267aec28 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd267b09d0 RDI: 00007ffd267b09d0 RBP: 00007ffd267b09d0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001088940 R13: 0000000000000000 R14: 00000000000002cf R15: 0000000000025da2 Code: 85 64 06 00 00 e8 27 98 b2 ff 4c 89 f7 e8 df f5 aa 05 48 8b 9d e8 fe ff ff e8 13 98 b2 ff 48 3b 9d c0 fe ff ff 0f 85 cc fe ff ff 01 98 b2 ff 65 ff 05 ba 57 3b 7e e8 f5 97 b2 ff 45 31 c9 45 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4535 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:check_memory_region+0x0/0x1b0 mm/kasan/kasan.c:158 RSP: 0018:ffff8801a481f940 EFLAGS: 00000246 RAX: ffffed0034903f2c RBX: 1ffff10034903f2c RCX: ffffffff81643fa5 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8801daf23610 RBP: ffff8801a481f948 R08: ffff8801a4812300 R09: 0000000000000004 R10: ffff8801a4812bd8 R11: ffff8801a4812300 R12: ffff8801daf23600 R13: ffff8801daf23610 R14: ffff8801a481f9c0 R15: dffffc0000000000 FS: 00000000020ab940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000020b4978 CR3: 00000001a4f47000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:349 [inline] rcu_is_watching+0x85/0x140 kernel/rcu/tree.c:1075 rcu_read_lock include/linux/rcupdate.h:633 [inline] d_walk+0xa1c/0xc80 fs/dcache.c:1303 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:00007ffe713e8838 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffe713ea5e0 RDI: 00007ffe713ea5e0 RBP: 00007ffe713ea5e0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000020ac940 R13: 0000000000000000 R14: 00000000000002bc R15: 0000000000025d95 Code: c3 48 8d 47 0f 48 89 c6 48 c1 ee 03 0f b6 14 16 84 d2 74 d5 83 e0 07 38 c2 40 0f 9e c6 eb c5 66 90 66 2e 0f 1f 84 00 00 00 00 00 <48> 85 f6 0f 84 3c 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f