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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2020-01-13 19:41:57 +0100
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2020-01-13 19:41:57 +0100
commit1d62a403734b18367eb0aa47493d0de644edd00b (patch)
treeecc4e57a3c54be4be9217114e9ba38bc25e31cca /htl/pt-internal.h
parentbc487d714191e91789ad420de274e789f710cac3 (diff)
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htl: Avoid crashing when passed invalid pthread_t values
Diffstat (limited to 'htl/pt-internal.h')
-rw-r--r--htl/pt-internal.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/htl/pt-internal.h b/htl/pt-internal.h
index 8754f38..f8d7d74 100644
--- a/htl/pt-internal.h
+++ b/htl/pt-internal.h
@@ -173,12 +173,14 @@ extern int __pthread_concurrency;
brain-dead users of the pthread interface incorrectly assume that 0
is an invalid pthread id.) */
extern struct __pthread **__pthread_threads;
+extern int __pthread_max_threads;
extern pthread_rwlock_t __pthread_threads_lock;
#define __pthread_getid(thread) \
- ({ struct __pthread *__t; \
+ ({ struct __pthread *__t = NULL; \
__pthread_rwlock_rdlock (&__pthread_threads_lock); \
- __t = __pthread_threads[thread - 1]; \
+ if (thread <= __pthread_max_threads) \
+ __t = __pthread_threads[thread - 1]; \
__pthread_rwlock_unlock (&__pthread_threads_lock); \
__t; })