watchdog: BUG: soft lockup - CPU#0 stuck for 134s! [syz-executor2:4554] Modules linked in: irq event stamp: 79681074 hardirqs last enabled at (79681073): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (79681073): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (79681073): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (79681073): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (79681073): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (79681074): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (384958): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (384521): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (384521): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4554 Comm: syz-executor2 Not tainted 4.17.0-rc5+ #60 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_release+0x4d4/0xa10 kernel/locking/lockdep.c:3942 RSP: 0018:ffff88018683f8b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10030d07f1c RCX: 1ffff10035c3b15d RDX: 1ffffffff11a30e5 RSI: 0000000000000005 RDI: 0000000000000286 RBP: ffff88018683f9e8 R08: 1ffff10030d07f20 R09: ffffed003b5c46c2 R10: 0000000000000003 R11: 0000000000000004 R12: ffff8801ae1d82c0 R13: ffffffff88d8df60 R14: ffff8801ae1d82c0 R15: ffff88018683f900 FS: 00000000016c8940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000016d1978 CR3: 0000000186801000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:251 [inline] rcu_read_unlock include/linux/rcupdate.h:688 [inline] d_walk+0x716/0xc80 fs/dcache.c:1327 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:00007ffd8e016888 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd8e018630 RDI: 00007ffd8e018630 RBP: 00007ffd8e018630 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000016c9940 R13: 0000000000000000 R14: 0000000000000113 R15: 0000000000017163 Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 a3 03 00 00 48 83 3d 13 80 74 07 00 0f 84 b8 02 00 00 48 8b bd e8 fe 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: 4558 Comm: syz-executor5 Not tainted 4.17.0-rc5+ #60 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_atomic_inc arch/x86/include/asm/atomic.h:96 [inline] RIP: 0010:atomic_inc include/asm-generic/atomic-instrumented.h:103 [inline] RIP: 0010:__lock_acquire+0x298/0x5140 kernel/locking/lockdep.c:3323 RSP: 0018:ffff880184b9f530 EFLAGS: 00000002 RAX: fffffbfff1447d36 RBX: ffffffff8a23e870 RCX: ffffffff815c9ee1 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8a23e9a8 RBP: ffff880184b9f8c0 R08: fffffbfff1447d36 R09: fffffbfff1447d35 R10: fffffbfff1447d35 R11: ffffffff8a23e9ab R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000002 R15: ffffffff88c12648 FS: 0000000001a6b940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc37e46ff8 CR3: 0000000184ae6000 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 seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] read_seqbegin include/linux/seqlock.h:433 [inline] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] d_walk+0x1c0/0xc80 fs/dcache.c:1248 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:00007ffc37e47288 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffc37e49030 RDI: 00007ffc37e49030 RBP: 00007ffc37e49030 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001a6c940 R13: 0000000000000000 R14: 0000000000000117 R15: 000000000001718f Code: ff ff ff 48 8d bb 38 01 00 00 be 04 00 00 00 4c 89 9c 24 88 00 00 00 44 89 84 24 90 00 00 00 e8 1f eb 58 00 f0 ff 83 38 01 00 00 <4c> 8b 9c 24 88 00 00 00 44 8b 84 24 90 00 00 00 49 8d 83 30 08