[Bug 230286] panic: lookup: ni_pathlen underflow to -3

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230286

            Bug ID: 230286
           Summary: panic: lookup: ni_pathlen underflow to -3
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Keywords: panic
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: pho at FreeBSD.org

20180802 05:27:31 all (109/576): cmp.sh
panic: lookup: ni_pathlen underflow to -3

cpuid = 44
time = 1533180477
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00f68b7db0
vpanic() at vpanic+0x1a3/frame 0xfffffe00f68b7e10
doadump() at doadump/frame 0xfffffe00f68b7e90
lookup() at lookup+0x9c0/frame 0xfffffe00f68b7f30
namei() at namei+0x4fd/frame 0xfffffe00f68b7ff0
kern_mkdirat() at kern_mkdirat+0x92/frame 0xfffffe00f68b8200
amd64_syscall() at amd64_syscall+0x29c/frame 0xfffffe00f68b8330
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe00f68b8330
--- syscall (136, FreeBSD ELF64, sys_mkdir), rip = 0x80040f3ba, rsp =
0x7fffffffdef8, rbp = 0x7fffffffe740 ---

Details @ https://people.freebsd.org/~pho/stress/log/cmp-2.txt

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