watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor7:4554] Modules linked in: irq event stamp: 57489626 hardirqs last enabled at (57489625): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (57489625): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (57489625): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (57489625): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (57489625): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (57489626): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (889364): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (889301): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (889301): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4554 Comm: syz-executor7 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: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:ffff8801a2c6f9f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a2c62200 RBX: 0000000000000293 RCX: 1ffff1003458c555 RDX: 0000000000000000 RSI: ffffffff81c7155b RDI: 0000000000000293 RBP: ffff8801a2c6fb78 R08: ffff8801a2c62a38 R09: 0000000000000006 R10: ffff8801a2c62200 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff1003458df82 R15: ffff8801a2c6fb50 FS: 0000000000d68940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000d71978 CR3: 00000001a2c57000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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: 0033:0x455767 RSP: 002b:00007ffc06c40bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455767 RDX: 0000000000000000 RSI: 00007ffc06c42960 RDI: 00007ffc06c42960 RBP: 00007ffc06c42960 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000000d69940 R13: 0000000000000000 R14: 000000000000014e R15: 00000000000152e3 Code: 88 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 1e 04 00 00 48 83 3d 18 78 0a 07 00 0f 84 29 02 00 00 e8 05 1e b2 ff 48 89 df 57 9d <0f> 1f 44 00 00 e8 f6 1d b2 ff 49 8d 5f 80 48 c1 eb 03 4c 01 eb Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4559 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:trace_lock_acquire include/trace/events/lock.h:13 [inline] RIP: 0010:lock_acquire+0x333/0x520 kernel/locking/lockdep.c:3919 RSP: 0018:ffff8801a17078f0 EFLAGS: 00000046 RAX: ffff8801bb77e110 RBX: 1ffff100342e0f23 RCX: ffff8801bb77e110 RDX: dffffc0000000000 RSI: 1ffff100376efc22 RDI: ffff8801a16f8b74 RBP: ffff8801a17079e0 R08: 0000000000000001 R09: 0000000000000000 R10: ffffed0039c36c18 R11: ffff8801ce1b60c3 R12: 0000000000000000 R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000001d41940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001d4a978 CR3: 00000001a169f000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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: 0033:0x455767 RSP: 002b:00007ffea1051ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455767 RDX: 0000000000000000 RSI: 00007ffea1053890 RDI: 00007ffea1053890 RBP: 00007ffea1053890 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001d42940 R13: 0000000000000000 R14: 000000000000014c R15: 00000000000156a0 Code: 25 1b 08 00 0f 84 36 01 00 00 48 85 c9 0f 84 a0 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 ce 48 89 c8 48 c1 ee 03 80 3c 16 00 <0f> 85 b6 01 00 00 4c 8b 11 48 89 9d 18 ff ff ff 48 89 c3 49 bb