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From: Samuel Thibault <sthibaul@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc] Subject: hurd: Make __realpath return EINVAL on NULL buf Date: Thu, 3 Aug 2023 20:47:28 +0000 (GMT) [thread overview] Message-ID: <20230803204728.C6C673858039@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2345bc44bb34f3eb6b49f4db3f0369573b892c3d commit 2345bc44bb34f3eb6b49f4db3f0369573b892c3d Author: Samuel Thibault <samuel.thibault@ens-lyon.org> Date: Thu Aug 3 21:15:58 2023 +0200 Subject: hurd: Make __realpath return EINVAL on NULL buf As Posix and stdlib/test-canon.c expects it, and rather than letting pathconf crash. Diff: --- debug/realpath_chk.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/debug/realpath_chk.c b/debug/realpath_chk.c index adfc09237c..8e734b534e 100644 --- a/debug/realpath_chk.c +++ b/debug/realpath_chk.c @@ -19,6 +19,7 @@ #include <stdlib.h> #include <string.h> #include <unistd.h> +#include <errno.h> char * @@ -30,7 +31,15 @@ __realpath_chk (const char *buf, char *resolved, size_t resolvedlen) return __realpath (buf, resolved); #else - long int pathmax =__pathconf (buf, _PC_PATH_MAX); + long int pathmax; + + if (buf == NULL) + { + __set_errno (EINVAL); + return NULL; + } + + pathmax = __pathconf (buf, _PC_PATH_MAX); if (pathmax != -1) { /* We do have a fixed limit. */
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