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[hurd, commited] htl: Avoid crashing when passed invalid pthread_t value
From: |
Samuel Thibault |
Subject: |
[hurd, commited] htl: Avoid crashing when passed invalid pthread_t values |
Date: |
Mon, 13 Jan 2020 19:43:11 +0100 |
---
htl/pt-internal.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/htl/pt-internal.h b/htl/pt-internal.h
index 8754f386a6..f8d7d74244 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; })
--
2.24.1
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