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authorUlrich Drepper <drepper@redhat.com>1999-07-06 16:26:03 +0000
committerUlrich Drepper <drepper@redhat.com>1999-07-06 16:26:03 +0000
commit2e65ca2b226a55e7d25ef687ce33185c0a71bd99 (patch)
tree0b76ef817b2b4977374fe025016e80fcd2e4f3ff /malloc/malloc.c
parent4708015f24a69bd0a436483c4d1244d1fb1f2e87 (diff)
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Update.
1999-07-06 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/alpha/ioperm.c: Update for some more motherboards. Patch by Jay Estabrook. * sysdeps/unix/sysv/linux/configure.in: Don't test for libc4 in ldd for SPARC. * /sysdeps/unix/sysv/linux/sparc/ldd-rewrite.sed: New file. Patch by Cristian Gafton. 1999-07-02 Cristian Gafton <gafton@redhat.com> * sysdeps/unix/sysv/linux/bits/socket.h (__cmsg_nxthdr): "return 0" instead of "return NULL" to make C++ happy. 1999-07-04 Mark Kettenis <kettenis@gnu.org> * libio/iofdopen.c (_IO_new_fdopen): Set EINVAL if MODE is not allowed by the file access mode of the open file. 1999-07-06 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/setfpucw.c: Include math.h to get all needed macros defined. 1999-07-03 Jakub Jelinek <jj@ultra.linux.cz> * sysdeps/sparc/sparc64/submul_1.S: Fix carry handling. Optimize. * sysdeps/sparc/sparc64/lshift.S: Make a leaf subroutine. Optimize. * sysdeps/sparc/sparc64/rshift.S: Likewise. * sysdeps/sparc/sparc64/mul_1.S: Optimize. 1999-07-04 Wolfram Gloger <wmglo@dent.med.uni-muenchen.de> * malloc/malloc.c (request2size): Check for overflow and return NULL whenever it is encountered. 1999-07-04 Zack Weinberg <zack@rabi.columbia.edu> * sysdeps/posix/tempname.c (__gen_tempname): Add ability to create directories. Replace OPENIT and LARGEFILE args with a single flags parameter. * sysdeps/generic/tempname.c: Likewise. * include/stdio.h: Adjust prototype of __gen_tempname to match. Define symbolic constants for second argument. * misc/mkdtemp.c: New file, provides new function mkdtemp(). * stdlib/stdlib.h: Prototype it. * misc/Versions: Export it. * misc/Makefile (routines): Add mktemp. * manual/filesys.texi: Document it. * misc/mktemp.c: Adjust call of __gen_tempname to match new convention. * misc/mkstemp.c: Likewise. * stdio-common/tempnam.c: Likewise. * stdio-common/tmpfile.c: Likewise. * stdio-common/tmpfile64.c: Likewise. * stdio-common/tmpnam.c: Likewise. * stdio-common/tmpnam_r.c: Likewise. 1999-07-05 Jakub Jelinek <jj@ultra.linux.cz> * sysdeps/sparc/sparc64/dl-machine.h (elf_machine_rela): Support R_SPARC_OLO10 relocations. * elf/elf.h (R_SPARC_OLO10): Fix comment.
Diffstat (limited to 'malloc/malloc.c')
-rw-r--r--malloc/malloc.c51
1 files changed, 35 insertions, 16 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 01ff7aa304..e096f00eeb 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -1259,12 +1259,12 @@ static void free_atfork();
#define chunk2mem(p) ((Void_t*)((char*)(p) + 2*SIZE_SZ))
#define mem2chunk(mem) ((mchunkptr)((char*)(mem) - 2*SIZE_SZ))
-/* pad request bytes into a usable size */
+/* pad request bytes into a usable size, return non-zero on overflow */
-#define request2size(req) \
- (((long)((req) + (SIZE_SZ + MALLOC_ALIGN_MASK)) < \
- (long)(MINSIZE + MALLOC_ALIGN_MASK)) ? MINSIZE : \
- (((req) + (SIZE_SZ + MALLOC_ALIGN_MASK)) & ~(MALLOC_ALIGN_MASK)))
+#define request2size(req, nb) \
+ ((nb = (req) + (SIZE_SZ + MALLOC_ALIGN_MASK)),\
+ ((long)nb <= 0 ? 1 : ((nb < (MINSIZE + MALLOC_ALIGN_MASK) ? (nb = MINSIZE) :\
+ (nb &= ~MALLOC_ALIGN_MASK)), 0)))
/* Check if m has acceptable alignment */
@@ -2622,7 +2622,8 @@ Void_t* mALLOc(bytes) size_t bytes;
}
#endif
- nb = request2size(bytes);
+ if(request2size(bytes, nb))
+ return 0;
arena_get(ar_ptr, nb);
if(!ar_ptr)
return 0;
@@ -3133,7 +3134,8 @@ Void_t* rEALLOc(oldmem, bytes) Void_t* oldmem; size_t bytes;
oldp = mem2chunk(oldmem);
oldsize = chunksize(oldp);
- nb = request2size(bytes);
+ if(request2size(bytes, nb))
+ return 0;
#if HAVE_MMAP
if (chunk_is_mmapped(oldp))
@@ -3399,7 +3401,8 @@ Void_t* mEMALIGn(alignment, bytes) size_t alignment; size_t bytes;
if (alignment < MINSIZE) alignment = MINSIZE;
- nb = request2size(bytes);
+ if(request2size(bytes, nb))
+ return 0;
arena_get(ar_ptr, nb + alignment + MINSIZE);
if(!ar_ptr)
return 0;
@@ -3574,7 +3577,8 @@ Void_t* cALLOc(n, elem_size) size_t n; size_t elem_size;
}
#endif
- sz = request2size(n * elem_size);
+ if(request2size(n * elem_size, sz))
+ return 0;
arena_get(ar_ptr, sz);
if(!ar_ptr)
return 0;
@@ -4364,8 +4368,10 @@ malloc_check(sz, caller) size_t sz; const Void_t *caller;
#endif
{
mchunkptr victim;
- INTERNAL_SIZE_T nb = request2size(sz + 1);
+ INTERNAL_SIZE_T nb;
+ if(request2size(sz+1, nb))
+ return 0;
(void)mutex_lock(&main_arena.mutex);
victim = (top_check() >= 0) ? chunk_alloc(&main_arena, nb) : NULL;
(void)mutex_unlock(&main_arena.mutex);
@@ -4434,7 +4440,10 @@ realloc_check(oldmem, bytes, caller)
}
oldsize = chunksize(oldp);
- nb = request2size(bytes+1);
+ if(request2size(bytes+1, nb)) {
+ (void)mutex_unlock(&main_arena.mutex);
+ return 0;
+ }
#if HAVE_MMAP
if (chunk_is_mmapped(oldp)) {
@@ -4491,7 +4500,8 @@ memalign_check(alignment, bytes, caller)
if (alignment <= MALLOC_ALIGNMENT) return malloc_check(bytes, NULL);
if (alignment < MINSIZE) alignment = MINSIZE;
- nb = request2size(bytes+1);
+ if(request2size(bytes+1, nb))
+ return 0;
(void)mutex_lock(&main_arena.mutex);
p = (top_check() >= 0) ? chunk_align(&main_arena, nb, alignment) : NULL;
(void)mutex_unlock(&main_arena.mutex);
@@ -4511,7 +4521,12 @@ malloc_starter(size_t sz, const Void_t *caller)
malloc_starter(sz, caller) size_t sz; const Void_t *caller;
#endif
{
- mchunkptr victim = chunk_alloc(&main_arena, request2size(sz));
+ INTERNAL_SIZE_T nb;
+ mchunkptr victim;
+
+ if(request2size(sz, nb))
+ return 0;
+ victim = chunk_alloc(&main_arena, nb);
return victim ? chunk2mem(victim) : 0;
}
@@ -4547,16 +4562,20 @@ malloc_atfork(sz, caller) size_t sz; const Void_t *caller;
#endif
{
Void_t *vptr = NULL;
+ INTERNAL_SIZE_T nb;
mchunkptr victim;
tsd_getspecific(arena_key, vptr);
if(!vptr) {
if(save_malloc_hook != malloc_check) {
- victim = chunk_alloc(&main_arena, request2size(sz));
+ if(request2size(sz, nb))
+ return 0;
+ victim = chunk_alloc(&main_arena, nb);
return victim ? chunk2mem(victim) : 0;
} else {
- if(top_check() < 0) return 0;
- victim = chunk_alloc(&main_arena, request2size(sz+1));
+ if(top_check()<0 || request2size(sz+1, nb))
+ return 0;
+ victim = chunk_alloc(&main_arena, nb);
return victim ? chunk2mem_check(victim, sz) : 0;
}
} else {