| Log Message: |
MFC r365910:
fix integer underflow in getgrnam_r and getpwnam_r
Sometimes nscd(8) will return a 1-byte buffer for a nonexistent entry. This
triggered an integer underflow in grp_unmarshal_func, causing getgrnam_r to
return ERANGE instead of 0.
Fix the user's buffer size check, and add a correct check for a too-small
nscd buffer.
PR: 248932
Event: September 2020 Bugathon
Reviewed by: markj
Sponsored by: Axcient
Differential Revision: https://reviews.freebsd.org/D26204
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stable/12/
stable/12/lib/libc/gen/getgrent.c