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| author | Rich Felker <dalias@aerifal.cx> | 2020-10-10 20:04:18 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2020-10-14 20:27:12 -0400 |
| commit | da845d52c5a8bee206fae899654e393d725a287f (patch) | |
| tree | ef1471628b81efed33e5ac0c862226095eb1d0a8 /src/passwd | |
| parent | b7bc966522d73e1dc420b5ee6fc7a2e78099a08c (diff) | |
| download | musl-da845d52c5a8bee206fae899654e393d725a287f.tar.gz musl-da845d52c5a8bee206fae899654e393d725a287f.tar.xz musl-da845d52c5a8bee206fae899654e393d725a287f.zip | |
fix getgrouplist when nscd reports an empty list
commit 500c6886c654fd45e4926990fee2c61d816be197 broke this by fixing the behavior of fread to conform to the C standard; getgroupslist was assuming the old behavior, that a request to read 1 member of length 0 would return 1, not 0.
Diffstat (limited to 'src/passwd')
| -rw-r--r-- | src/passwd/getgrouplist.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/passwd/getgrouplist.c b/src/passwd/getgrouplist.c index 43e51824..301824ce 100644 --- a/src/passwd/getgrouplist.c +++ b/src/passwd/getgrouplist.c @@ -31,7 +31,8 @@ int getgrouplist(const char *user, gid_t gid, gid_t *groups, int *ngroups) if (resp[INITGRFOUND]) { nscdbuf = calloc(resp[INITGRNGRPS], sizeof(uint32_t)); if (!nscdbuf) goto cleanup; - if (!fread(nscdbuf, sizeof(*nscdbuf)*resp[INITGRNGRPS], 1, f)) { + size_t nbytes = sizeof(*nscdbuf)*resp[INITGRNGRPS]; + if (nbytes && !fread(nscdbuf, nbytes, 1, f)) { if (!ferror(f)) errno = EIO; goto cleanup; } |