From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Tue, 9 Feb 2021 17:40:06 +0000 (-0300)
Subject: linux: Fix __sem_check_add_mapping name length
X-Git-Tag: glibc-2.34~964
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e99156816d5033ca9421c80f55c5c8e7fcd5082b;p=thirdparty%2Fglibc.git

linux: Fix __sem_check_add_mapping name length

Take in consideration the trailling NULL since sem_search uses
strcmp to compare entries.

Checked on x86_64-linux-gnu and powerpc-linux-gnu (where it triggered
a nptl/tst-sem7 regression).
---

diff --git a/sysdeps/pthread/sem_routines.c b/sysdeps/pthread/sem_routines.c
index ea7a4453240..c2c8b54cd0f 100644
--- a/sysdeps/pthread/sem_routines.c
+++ b/sysdeps/pthread/sem_routines.c
@@ -72,6 +72,7 @@ __sem_check_add_mapping (const char *name, int fd, sem_t *existing)
   size_t namelen = strlen (name);
   if (namelen > NAME_MAX)
     return SEM_FAILED;
+  namelen += 1;
 
   sem_t *result = SEM_FAILED;