bash/bash-5.1-patch-9.patch
2021-11-26 16:53:48 +01:00

51 lines
1.4 KiB
Diff

From fed42742e0b33b358610bf62c7474f55e6465205 Mon Sep 17 00:00:00 2001
From: Chet Ramey <chet.ramey@case.edu>
Date: Wed, 17 Nov 2021 16:44:19 -0500
Subject: [PATCH] Bash-5.1 patch 9: fix bash malloc implementation of
malloc_usable_size
---
lib/malloc/malloc.c | 13 ++++++-------
patchlevel.h | 2 +-
2 files changed, 7 insertions(+), 8 deletions(-)
diff --git a/lib/malloc/malloc.c b/lib/malloc/malloc.c
index 439f8ef1..92e6efa5 100644
--- a/lib/malloc/malloc.c
+++ b/lib/malloc/malloc.c
@@ -1286,13 +1286,12 @@ malloc_usable_size (mem)
p = (union mhead *) ap - 1;
}
- /* XXX - should we return 0 if ISFREE? */
- maxbytes = binsize(p->mh_index);
-
- /* So the usable size is the maximum number of bytes in the bin less the
- malloc overhead */
- maxbytes -= MOVERHEAD + MSLOP;
- return (maxbytes);
+ /* return 0 if ISFREE */
+ if (p->mh_alloc == ISFREE)
+ return 0;
+
+ /* Since we use bounds checking, the usable size is the last requested size. */
+ return (p->mh_nbytes);
}
#if !defined (NO_VALLOC)
diff --git a/patchlevel.h b/patchlevel.h
index 10fde2ee..17586ff7 100644
--- a/patchlevel.h
+++ b/patchlevel.h
@@ -25,6 +25,6 @@
regexp `^#define[ ]*PATCHLEVEL', since that's what support/mkversion.sh
looks for to find the patch level (for the sccs version string). */
-#define PATCHLEVEL 8
+#define PATCHLEVEL 9
#endif /* _PATCHLEVEL_H_ */
--
2.31.1