watchdog: BUG: soft lockup - CPU#0 stuck for 134s! [syz-executor1:4566] Modules linked in: irq event stamp: 54511586 hardirqs last enabled at (54511585): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (54511585): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (54511585): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (54511585): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (54511585): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (54511586): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (666990): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (666831): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (666831): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4566 Comm: syz-executor1 Not tainted 4.17.0-rc7+ #38 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:lock_acquire+0x257/0x520 kernel/locking/lockdep.c:3923 RSP: 0018:ffff88019e5178f0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10033ca2f23 RCX: 0000000000000000 RDX: 1ffffffff11a31ad RSI: ffff88019e50a938 RDI: 0000000000000286 RBP: ffff88019e5179e0 R08: 0000000000000008 R09: 0000000000000004 R10: ffff88019e50a9d8 R11: ffff88019e50a100 R12: ffff88019e50a100 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000 FS: 00000000025fe940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f42bb1f3db8 CR3: 000000019e402000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:246 [inline] rcu_read_lock include/linux/rcupdate.h:632 [inline] d_walk+0x49b/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: 0033:0x455767 RSP: 002b:00007ffd3a60e238 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455767 RDX: 0000000000000000 RSI: 00007ffd3a60ffe0 RDI: 00007ffd3a60ffe0 RBP: 00007ffd3a60ffe0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000025ff940 R13: 0000000000000000 R14: 000000000000018c R15: 0000000000016dd2 Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 02 00 00 48 83 3d 80 7c 74 07 00 0f 84 c8 01 00 00 48 8b bd 20 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4567 Comm: syz-executor0 Not tainted 4.17.0-rc7+ #38 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mark_lock+0x3b/0x19e0 kernel/locking/lockdep.c:3114 RSP: 0018:ffff88019e1ff4f8 EFLAGS: 00000802 RAX: 0000000000000000 RBX: 1ffff10033c3fe83 RCX: 0000000000000008 RDX: dffffc0000000000 RSI: ffff88019e1d8a18 RDI: ffff88019e1d8140 RBP: ffff88019e1ff520 R08: 0000000000000008 R09: 0000000000000004 R10: ffff88019e1d8140 R11: ffff88019e1d8140 R12: ffff88019e1d8a18 R13: ffff88019e1d8a38 R14: 0000000000000002 R15: 0000000000000100 FS: 00000000027bb940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd8f786fcc CR3: 000000019e1b3000 CR4: 00000000001406e0 DR0: 00000000200001c0 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __lock_acquire+0x7f5/0x5140 kernel/locking/lockdep.c:3392 lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 rcu_lock_acquire include/linux/rcupdate.h:246 [inline] rcu_read_lock include/linux/rcupdate.h:632 [inline] d_walk+0x49b/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: 0033:0x455767 RSP: 002b:00007ffd8f7876d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455767 RDX: 0000000000000000 RSI: 00007ffd8f789480 RDI: 00007ffd8f789480 RBP: 00007ffd8f789480 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000027bc940 R13: 0000000000000000 R14: 0000000000000183 R15: 0000000000017139 Code: df 44 89 c1 48 89 e5 41 57 41 bf 01 00 00 00 41 56 41 d3 e7 41 55 4c 8d 6e 20 41 54 49 89 f4 53 48 8d 9d f8 fe ff ff 48 c1 eb 03 <48> 8d 04 13 48 81 ec 08 01 00 00 48 c7 85 f8 fe ff ff b3 8a b5