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gc.6028
CVE-2016-9427.patch
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File CVE-2016-9427.patch of Package gc.6028
Index: gc-7.2/allchblk.c =================================================================== --- gc-7.2.orig/allchblk.c +++ gc-7.2/allchblk.c @@ -594,7 +594,7 @@ GC_allochblk(size_t sz, int kind, unsign /* split. */ GC_ASSERT((sz & (GRANULE_BYTES - 1)) == 0); - blocks = OBJ_SZ_TO_BLOCKS(sz); + blocks = OBJ_SZ_TO_BLOCKS_CHECKED(sz); if ((signed_word)(blocks * HBLKSIZE) < 0) { return 0; } @@ -661,7 +661,7 @@ GC_allochblk_nth(size_t sz, int kind, un signed_word size_needed; /* number of bytes in requested objects */ signed_word size_avail; /* bytes available in this block */ - size_needed = HBLKSIZE * OBJ_SZ_TO_BLOCKS(sz); + size_needed = HBLKSIZE * OBJ_SZ_TO_BLOCKS_CHECKED(sz); /* search for a big enough block in free list */ hbp = GC_hblkfreelist[n]; Index: gc-7.2/alloc.c =================================================================== --- gc-7.2.orig/alloc.c +++ gc-7.2/alloc.c @@ -1138,13 +1138,13 @@ GC_word GC_max_retries = 0; */ GC_INNER GC_bool GC_expand_hp_inner(word n) { - word bytes; + size_t bytes; struct hblk * space; word expansion_slop; /* Number of bytes by which we expect the */ /* heap to expand soon. */ if (n < MINHINCR) n = MINHINCR; - bytes = n * HBLKSIZE; + bytes = (size_t)n * HBLKSIZE; /* Make sure bytes is a multiple of GC_page_size */ { word mask = GC_page_size - 1; @@ -1152,7 +1152,9 @@ GC_INNER GC_bool GC_expand_hp_inner(word bytes &= ~mask; } - if (GC_max_heapsize != 0 && GC_heapsize + bytes > GC_max_heapsize) { + if (GC_max_heapsize != 0 + && (GC_max_heapsize < (word)bytes + || GC_heapsize > GC_max_heapsize - (word)bytes)) { /* Exceeded self-imposed limit */ return(FALSE); } @@ -1176,7 +1178,7 @@ GC_INNER GC_bool GC_expand_hp_inner(word if ((GC_last_heap_addr == 0 && !((word)space & SIGNB)) || (GC_last_heap_addr != 0 && GC_last_heap_addr < (ptr_t)space)) { /* Assume the heap is growing up */ - word new_limit = (word)space + bytes + expansion_slop; + word new_limit = (word)space + (word)bytes + expansion_slop; if (new_limit > (word)space) { GC_greatest_plausible_heap_addr = (void *)GC_max((word)GC_greatest_plausible_heap_addr, @@ -1221,6 +1223,8 @@ GC_INNER unsigned GC_fail_count = 0; /* How many consecutive GC/expansion failures? */ /* Reset by GC_allochblk. */ +#define GC_WORD_MAX (~(word)0) + /* Collect or expand heap in an attempt make the indicated number of */ /* free blocks available. Should be called until the blocks are */ /* available (seting retry value to TRUE unless this is the first call */ @@ -1269,6 +1273,8 @@ GC_INNER GC_bool GC_collect_or_expand(wo } else { blocks_to_get = MAXHINCR; } + if (blocks_to_get > divHBLKSZ(GC_WORD_MAX)) + blocks_to_get = divHBLKSZ(GC_WORD_MAX); } if (!GC_expand_hp_inner(blocks_to_get) Index: gc-7.2/dbg_mlc.c =================================================================== --- gc-7.2.orig/dbg_mlc.c +++ gc-7.2/dbg_mlc.c @@ -461,7 +461,7 @@ GC_API void * GC_CALL GC_debug_malloc(si /* Note that according to malloc() specification, if size is 0 then */ /* malloc() returns either NULL, or a unique pointer value that can */ /* later be successfully passed to free(). We always do the latter. */ - result = GC_malloc(lb + DEBUG_BYTES); + result = GC_malloc(SIZET_SAT_ADD(lb, DEBUG_BYTES)); if (result == 0) { GC_err_printf("GC_debug_malloc(%lu) returning NULL (", @@ -480,7 +480,7 @@ GC_API void * GC_CALL GC_debug_malloc(si GC_API void * GC_CALL GC_debug_malloc_ignore_off_page(size_t lb, GC_EXTRA_PARAMS) { - void * result = GC_malloc_ignore_off_page(lb + DEBUG_BYTES); + void * result = GC_malloc_ignore_off_page(SIZET_SAT_ADD(lb, DEBUG_BYTES)); if (result == 0) { GC_err_printf("GC_debug_malloc_ignore_off_page(%lu) returning NULL (", @@ -499,7 +499,8 @@ GC_API void * GC_CALL GC_debug_malloc_ig GC_API void * GC_CALL GC_debug_malloc_atomic_ignore_off_page(size_t lb, GC_EXTRA_PARAMS) { - void * result = GC_malloc_atomic_ignore_off_page(lb + DEBUG_BYTES); + void * result = GC_malloc_atomic_ignore_off_page( + SIZET_SAT_ADD(lb, DEBUG_BYTES)); if (result == 0) { GC_err_printf("GC_debug_malloc_atomic_ignore_off_page(%lu)" @@ -523,7 +524,8 @@ GC_API void * GC_CALL GC_debug_malloc_at /* we already hold the GC lock. */ GC_INNER void * GC_debug_generic_malloc_inner(size_t lb, int k) { - void * result = GC_generic_malloc_inner(lb + DEBUG_BYTES, k); + void * result = GC_generic_malloc_inner( + SIZET_SAT_ADD(lb, DEBUG_BYTES), k); if (result == 0) { GC_err_printf("GC internal allocation (%lu bytes) returning NULL\n", @@ -538,7 +540,7 @@ GC_API void * GC_CALL GC_debug_malloc_at int k) { void * result = GC_generic_malloc_inner_ignore_off_page( - lb + DEBUG_BYTES, k); + SIZET_SAT_ADD(lb, DEBUG_BYTES), k); if (result == 0) { GC_err_printf("GC internal allocation (%lu bytes) returning NULL\n", @@ -553,7 +555,7 @@ GC_API void * GC_CALL GC_debug_malloc_at #ifdef STUBBORN_ALLOC GC_API void * GC_CALL GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS) { - void * result = GC_malloc_stubborn(lb + DEBUG_BYTES); + void * result = GC_malloc_stubborn(SIZET_SAT_ADD(lb, DEBUG_BYTES)); if (result == 0) { GC_err_printf("GC_debug_malloc(%lu) returning NULL (", @@ -619,7 +621,7 @@ GC_API void * GC_CALL GC_debug_malloc_at GC_API void * GC_CALL GC_debug_malloc_atomic(size_t lb, GC_EXTRA_PARAMS) { - void * result = GC_malloc_atomic(lb + DEBUG_BYTES); + void * result = GC_malloc_atomic(SIZET_SAT_ADD(lb, DEBUG_BYTES)); if (result == 0) { GC_err_printf("GC_debug_malloc_atomic(%lu) returning NULL (", @@ -702,7 +704,8 @@ GC_API char * GC_CALL GC_debug_strndup(c GC_API void * GC_CALL GC_debug_malloc_uncollectable(size_t lb, GC_EXTRA_PARAMS) { - void * result = GC_malloc_uncollectable(lb + UNCOLLECTABLE_DEBUG_BYTES); + void * result = GC_malloc_uncollectable( + SIZET_SAT_ADD(lb, UNCOLLECTABLE_DEBUG_BYTES)); if (result == 0) { GC_err_printf("GC_debug_malloc_uncollectable(%lu) returning NULL (", @@ -722,8 +725,8 @@ GC_API void * GC_CALL GC_debug_malloc_un GC_API void * GC_CALL GC_debug_malloc_atomic_uncollectable(size_t lb, GC_EXTRA_PARAMS) { - void * result = - GC_malloc_atomic_uncollectable(lb + UNCOLLECTABLE_DEBUG_BYTES); + void * result = GC_malloc_atomic_uncollectable( + SIZET_SAT_ADD(lb, UNCOLLECTABLE_DEBUG_BYTES)); if (result == 0) { GC_err_printf( Index: gc-7.2/gcj_mlc.c =================================================================== --- gc-7.2.orig/gcj_mlc.c +++ gc-7.2/gcj_mlc.c @@ -216,7 +216,8 @@ GC_API void * GC_CALL GC_debug_gcj_mallo /* confuse the backtrace. */ LOCK(); maybe_finalize(); - result = GC_generic_malloc_inner(lb + DEBUG_BYTES, GC_gcj_debug_kind); + result = GC_generic_malloc_inner(SIZET_SAT_ADD(lb, DEBUG_BYTES), + GC_gcj_debug_kind); if (result == 0) { GC_oom_func oom_fn = GC_oom_fn; UNLOCK(); Index: gc-7.2/headers.c =================================================================== --- gc-7.2.orig/headers.c +++ gc-7.2/headers.c @@ -126,7 +126,7 @@ GC_INNER ptr_t GC_scratch_alloc(size_t b return(result); } { - word bytes_to_get = MINHINCR * HBLKSIZE; + size_t bytes_to_get = MINHINCR * HBLKSIZE; if (bytes_to_get <= bytes) { /* Undo the damage, and get memory directly */ Index: gc-7.2/include/private/gc_priv.h =================================================================== --- gc-7.2.orig/include/private/gc_priv.h +++ gc-7.2/include/private/gc_priv.h @@ -90,6 +90,20 @@ typedef char * ptr_t; /* A generic poi /* byte displacements and which can be used */ /* for address comparisons. */ +#ifndef SIZE_MAX +# include <limits.h> +#endif +#ifdef SIZE_MAX +# define GC_SIZE_MAX SIZE_MAX +#else +# define GC_SIZE_MAX (~(size_t)0) +#endif + +/* Saturated addition of size_t values. Used to avoid value wrap */ +/* around on overflow. The arguments should have no side effects. */ +#define SIZET_SAT_ADD(a, b) \ + ((a) < GC_SIZE_MAX - (b) ? (a) + (b) : GC_SIZE_MAX) + #ifndef GCCONFIG_H # include "gcconfig.h" #endif @@ -245,9 +259,9 @@ typedef char * ptr_t; /* A generic poi # ifdef LINT2 /* Explicitly instruct the code analysis tool that */ /* GC_all_interior_pointers is assumed to have only 0 or 1 value. */ -# define EXTRA_BYTES (GC_all_interior_pointers? 1 : 0) +# define EXTRA_BYTES ((size_t)(GC_all_interior_pointers? 1 : 0)) # else -# define EXTRA_BYTES GC_all_interior_pointers +# define EXTRA_BYTES (size_t)GC_all_interior_pointers # endif # define MAX_EXTRA_BYTES 1 #else @@ -655,6 +669,7 @@ GC_EXTERN GC_warn_proc GC_current_warn_p # define LOG_HBLKSIZE ((size_t)CPP_LOG_HBLKSIZE) # define HBLKSIZE ((size_t)CPP_HBLKSIZE) +#define GC_SQRT_SIZE_MAX ((((size_t)1) << (WORDSZ / 2)) - 1) /* max size objects supported by freelist (larger objects are */ /* allocated directly with allchblk(), by rounding to the next */ @@ -684,8 +699,8 @@ GC_EXTERN GC_warn_proc GC_current_warn_p # define HBLKDISPL(objptr) (((size_t) (objptr)) & (HBLKSIZE-1)) /* Round up byte allocation requests to integral number of words, etc. */ -# define ROUNDED_UP_GRANULES(n) \ - BYTES_TO_GRANULES((n) + (GRANULE_BYTES - 1 + EXTRA_BYTES)) +# define ROUNDED_UP_GRANULES(lb) /* lb should have no side-effect */ \ + BYTES_TO_GRANULES(SIZET_SAT_ADD(lb, GRANULE_BYTES - 1 + EXTRA_BYTES)) # if MAX_EXTRA_BYTES == 0 # define SMALL_OBJ(bytes) EXPECT((bytes) <= (MAXOBJBYTES), TRUE) # else @@ -695,7 +710,8 @@ GC_EXTERN GC_warn_proc GC_current_warn_p /* This really just tests bytes <= MAXOBJBYTES - EXTRA_BYTES. */ /* But we try to avoid looking up EXTRA_BYTES. */ # endif -# define ADD_SLOP(bytes) ((bytes) + EXTRA_BYTES) +# define ADD_SLOP(lb) /* lb should have no side-effect */ \ + SIZET_SAT_ADD(lb, EXTRA_BYTES) # ifndef MIN_WORDS # define MIN_WORDS 2 /* FIXME: obsolete */ # endif @@ -892,9 +908,11 @@ struct hblk { # define HBLK_IS_FREE(hdr) (((hdr) -> hb_flags & FREE_BLK) != 0) -# define OBJ_SZ_TO_BLOCKS(sz) divHBLKSZ((sz) + HBLKSIZE-1) +# define OBJ_SZ_TO_BLOCKS(lb) divHBLKSZ((lb) + HBLKSIZE-1) +# define OBJ_SZ_TO_BLOCKS_CHECKED(lb) /* lb should have no side-effect */ \ + divHBLKSZ(SIZET_SAT_ADD(lb, HBLKSIZE - 1)) /* Size of block (in units of HBLKSIZE) needed to hold objects of */ - /* given sz (in bytes). */ + /* given lb (in bytes). The checked variant prevents wrap around. */ /* Object free list link */ # define obj_link(p) (*(void **)(p)) @@ -1262,7 +1280,7 @@ GC_EXTERN word GC_n_heap_sects; /* Numbe /* sections. */ #endif -GC_EXTERN word GC_page_size; +GC_EXTERN size_t GC_page_size; #if defined(MSWIN32) || defined(MSWINCE) || defined(CYGWIN32) struct _SYSTEM_INFO; Index: gc-7.2/include/private/gcconfig.h =================================================================== --- gc-7.2.orig/include/private/gcconfig.h +++ gc-7.2/include/private/gcconfig.h @@ -2779,7 +2779,8 @@ /* usually makes it possible to merge consecutively allocated */ /* chunks. It also avoids unintended recursion with */ /* REDIRECT_MALLOC macro defined. */ - /* GET_MEM() returns a HLKSIZE aligned chunk. */ + /* GET_MEM() argument should be of size_t type and have */ + /* no side-effect. GET_MEM() returns HLKSIZE-aligned chunk; */ /* 0 is taken to mean failure. */ /* In the case os USE_MMAP, the argument must also be a */ /* physical page size. */ @@ -2789,45 +2790,52 @@ struct hblk; /* See gc_priv.h. */ # if defined(PCR) char * real_malloc(size_t bytes); -# define GET_MEM(bytes) HBLKPTR(real_malloc((size_t)(bytes) + GC_page_size) \ +# define GET_MEM(bytes) HBLKPTR(real_malloc(SIZET_SAT_ADD(bytes, \ + GC_page_size)) \ + GC_page_size-1) # elif defined(OS2) void * os2_alloc(size_t bytes); -# define GET_MEM(bytes) HBLKPTR((ptr_t)os2_alloc((size_t)(bytes) \ - + GC_page_size) + GC_page_size-1) +# define GET_MEM(bytes) HBLKPTR((ptr_t)os2_alloc( \ + SIZET_SAT_ADD(bytes, \ + GC_page_size)) \ + + GC_page_size-1) # elif defined(NEXT) || defined(DOS4GW) || defined(NONSTOP) \ || (defined(AMIGA) && !defined(GC_AMIGA_FASTALLOC)) \ || (defined(SOLARIS) && !defined(USE_MMAP)) || defined(RTEMS) \ || defined(__CC_ARM) # define GET_MEM(bytes) HBLKPTR((size_t)calloc(1, \ - (size_t)(bytes) + GC_page_size) \ + SIZET_SAT_ADD(bytes, \ + GC_page_size)) \ + GC_page_size - 1) # elif defined(MSWIN32) || defined(CYGWIN32) - ptr_t GC_win32_get_mem(GC_word bytes); + ptr_t GC_win32_get_mem(size_t bytes); # define GET_MEM(bytes) (struct hblk *)GC_win32_get_mem(bytes) # elif defined(MACOS) # if defined(USE_TEMPORARY_MEMORY) Ptr GC_MacTemporaryNewPtr(size_t size, Boolean clearMemory); -# define GET_MEM(bytes) HBLKPTR( \ - GC_MacTemporaryNewPtr((bytes) + GC_page_size, true) \ +# define GET_MEM(bytes) HBLKPTR(GC_MacTemporaryNewPtr( \ + SIZET_SAT_ADD(bytes, \ + GC_page_size), true) \ + GC_page_size-1) # else -# define GET_MEM(bytes) HBLKPTR(NewPtrClear((bytes) + GC_page_size) \ +# define GET_MEM(bytes) HBLKPTR(NewPtrClear(SIZET_SAT_ADD(bytes, \ + GC_page_size)) \ + GC_page_size-1) # endif # elif defined(MSWINCE) - ptr_t GC_wince_get_mem(GC_word bytes); + ptr_t GC_wince_get_mem(size_t bytes); # define GET_MEM(bytes) (struct hblk *)GC_wince_get_mem(bytes) # elif defined(AMIGA) && defined(GC_AMIGA_FASTALLOC) void *GC_amiga_get_mem(size_t size); -# define GET_MEM(bytes) HBLKPTR((size_t) \ - GC_amiga_get_mem((size_t)(bytes) + GC_page_size) \ +# define GET_MEM(bytes) HBLKPTR((size_t)GC_amiga_get_mem( \ + SIZET_SAT_ADD(bytes, \ + GC_page_size)) \ + GC_page_size-1) # elif defined(SN_TARGET_PS3) void *ps3_get_mem(size_t size); # define GET_MEM(bytes) (struct hblk*)ps3_get_mem(bytes) # else - ptr_t GC_unix_get_mem(GC_word bytes); + ptr_t GC_unix_get_mem(size_t bytes); # define GET_MEM(bytes) (struct hblk *)GC_unix_get_mem(bytes) # endif #endif /* GC_PRIVATE_H */ Index: gc-7.2/malloc.c =================================================================== --- gc-7.2.orig/malloc.c +++ gc-7.2/malloc.c @@ -48,7 +48,7 @@ GC_INNER ptr_t GC_alloc_large(size_t lb, /* Round up to a multiple of a granule. */ lb = (lb + GRANULE_BYTES - 1) & ~(GRANULE_BYTES - 1); - n_blocks = OBJ_SZ_TO_BLOCKS(lb); + n_blocks = OBJ_SZ_TO_BLOCKS_CHECKED(lb); if (!GC_is_initialized) GC_init(); /* Do our share of marking work */ if (GC_incremental && !GC_dont_gc) @@ -84,10 +84,11 @@ GC_INNER ptr_t GC_alloc_large(size_t lb, STATIC ptr_t GC_alloc_large_and_clear(size_t lb, int k, unsigned flags) { ptr_t result = GC_alloc_large(lb, k, flags); - word n_blocks = OBJ_SZ_TO_BLOCKS(lb); if (0 == result) return 0; if (GC_debugging_started || GC_obj_kinds[k].ok_init) { + word n_blocks = OBJ_SZ_TO_BLOCKS(lb); + /* Clear the whole block, in case of GC_realloc call. */ BZERO(result, n_blocks * HBLKSIZE); } @@ -167,8 +168,6 @@ GC_API void * GC_CALL GC_generic_malloc( GC_bool init; lg = ROUNDED_UP_GRANULES(lb); lb_rounded = GRANULES_TO_BYTES(lg); - if (lb_rounded < lb) - return((*GC_get_oom_fn())(lb)); n_blocks = OBJ_SZ_TO_BLOCKS(lb_rounded); init = GC_obj_kinds[k].ok_init; LOCK(); @@ -375,15 +374,6 @@ void * malloc(size_t lb) } #endif /* GC_LINUX_THREADS */ -#include <limits.h> -#ifdef SIZE_MAX -# define GC_SIZE_MAX SIZE_MAX -#else -# define GC_SIZE_MAX (~(size_t)0) -#endif - -#define GC_SQRT_SIZE_MAX ((1U << (WORDSZ / 2)) - 1) - void * calloc(size_t n, size_t lb) { if ((lb | n) > GC_SQRT_SIZE_MAX /* fast initial test */ Index: gc-7.2/mallocx.c =================================================================== --- gc-7.2.orig/mallocx.c +++ gc-7.2/mallocx.c @@ -182,8 +182,6 @@ GC_INNER void * GC_generic_malloc_ignore return(GC_generic_malloc((word)lb, k)); lg = ROUNDED_UP_GRANULES(lb); lb_rounded = GRANULES_TO_BYTES(lg); - if (lb_rounded < lb) - return((*GC_get_oom_fn())(lb)); n_blocks = OBJ_SZ_TO_BLOCKS(lb_rounded); init = GC_obj_kinds[k].ok_init; if (GC_have_errors) GC_print_all_errors(); @@ -434,9 +432,11 @@ GC_API void GC_CALL GC_generic_malloc_ma GC_API void * GC_CALL GC_malloc_many(size_t lb) { void *result; - GC_generic_malloc_many((lb + EXTRA_BYTES + GRANULE_BYTES-1) - & ~(GRANULE_BYTES-1), - NORMAL, &result); + /* Add EXTRA_BYTES and round up to a multiple of a granule. */ + lb = SIZET_SAT_ADD(lb, EXTRA_BYTES + GRANULE_BYTES - 1) + & ~(GRANULE_BYTES - 1); + + GC_generic_malloc_many(lb, NORMAL, &result); return result; } @@ -460,7 +460,7 @@ GC_API void * GC_CALL GC_memalign(size_t } /* We could also try to make sure that the real rounded-up object size */ /* is a multiple of align. That would be correct up to HBLKSIZE. */ - new_lb = lb + align - 1; + new_lb = SIZET_SAT_ADD(lb, align - 1); result = GC_malloc(new_lb); offset = (word)result % align; if (offset != 0) { Index: gc-7.2/misc.c =================================================================== --- gc-7.2.orig/misc.c +++ gc-7.2/misc.c @@ -184,7 +184,7 @@ GC_API void GC_CALL GC_set_handle_fork(i /* quantization algorithm (but we precompute it). */ STATIC void GC_init_size_map(void) { - int i; + size_t i; /* Map size 0 to something bigger. */ /* This avoids problems at lower levels. */ Index: gc-7.2/os_dep.c =================================================================== --- gc-7.2.orig/os_dep.c +++ gc-7.2/os_dep.c @@ -690,7 +690,7 @@ struct o32_obj { # endif /* OS/2 */ /* Find the page size */ -GC_INNER word GC_page_size = 0; +GC_INNER size_t GC_page_size = 0; #if defined(MSWIN32) || defined(MSWINCE) || defined(CYGWIN32) # ifndef VER_PLATFORM_WIN32_CE @@ -704,7 +704,7 @@ GC_INNER word GC_page_size = 0; GC_INNER void GC_setpagesize(void) { GetSystemInfo(&GC_sysinfo); - GC_page_size = GC_sysinfo.dwPageSize; + GC_page_size = (size_t)GC_sysinfo.dwPageSize; # if defined(MSWINCE) && !defined(_WIN32_WCE_EMULATION) { OSVERSIONINFO verInfo; @@ -781,7 +781,7 @@ GC_INNER word GC_page_size = 0; GC_INNER void GC_setpagesize(void) { # if defined(MPROTECT_VDB) || defined(PROC_VDB) || defined(USE_MMAP) - GC_page_size = GETPAGESIZE(); + GC_page_size = (size_t)GETPAGESIZE(); if (!GC_page_size) ABORT("getpagesize() failed"); # else /* It's acceptable to fake it. */ @@ -2031,7 +2031,7 @@ void GC_register_data_segments(void) # define HEAP_START ((ptr_t)0) #endif -STATIC ptr_t GC_unix_mmap_get_mem(word bytes) +STATIC ptr_t GC_unix_mmap_get_mem(size_t bytes) { void *result; static ptr_t last_addr = HEAP_START; @@ -2060,7 +2060,7 @@ STATIC ptr_t GC_unix_mmap_get_mem(word b /* Oops. We got the end of the address space. This isn't */ /* usable by arbitrary C code, since one-past-end pointers */ /* don't work, so we discard it and try again. */ - munmap(result, (size_t)(-GC_page_size) - (size_t)result); + munmap(result, ~GC_page_size - (size_t)result + 1); /* Leave last page mapped, so we can't repeat. */ return GC_unix_mmap_get_mem(bytes); } @@ -2073,13 +2073,13 @@ STATIC ptr_t GC_unix_mmap_get_mem(word b # endif /* MMAP_SUPPORTED */ #if defined(USE_MMAP) - ptr_t GC_unix_get_mem(word bytes) + ptr_t GC_unix_get_mem(size_t bytes) { return GC_unix_mmap_get_mem(bytes); } #else /* !USE_MMAP */ -STATIC ptr_t GC_unix_sbrk_get_mem(word bytes) +STATIC ptr_t GC_unix_sbrk_get_mem(size_t bytes) { ptr_t result; # ifdef IRIX5 @@ -2096,7 +2096,7 @@ STATIC ptr_t GC_unix_sbrk_get_mem(word b goto out; } if (lsbs != 0) { - if((ptr_t)sbrk(GC_page_size - lsbs) == (ptr_t)(-1)) { + if((ptr_t)sbrk((SBRK_ARG_T)GC_page_size - lsbs) == (ptr_t)(-1)) { result = 0; goto out; } @@ -2120,7 +2120,7 @@ STATIC ptr_t GC_unix_sbrk_get_mem(word b return(result); } -ptr_t GC_unix_get_mem(word bytes) +ptr_t GC_unix_get_mem(size_t bytes) { # if defined(MMAP_SUPPORTED) /* By default, we try both sbrk and mmap, in that order. */ @@ -2189,7 +2189,7 @@ void * os2_alloc(size_t bytes) #endif /* MSWIN32 */ #if defined(MSWIN32) || defined(CYGWIN32) - ptr_t GC_win32_get_mem(word bytes) + ptr_t GC_win32_get_mem(size_t bytes) { ptr_t result; @@ -2200,8 +2200,8 @@ void * os2_alloc(size_t bytes) /* VirtualAlloc doesn't like PAGE_EXECUTE_READWRITE. */ /* There are also unconfirmed rumors of other */ /* problems, so we dodge the issue. */ - result = (ptr_t) GlobalAlloc(0, bytes + HBLKSIZE); - result = (ptr_t)(((word)result + HBLKSIZE - 1) & ~(HBLKSIZE-1)); + result = (ptr_t)(((word)GlobalAlloc(0, SIZET_SAT_ADD(bytes, HBLKSIZE)) + + HBLKSIZE - 1) & ~(HBLKSIZE - 1)); } else { /* VirtualProtect only works on regions returned by a */ /* single VirtualAlloc call. Thus we allocate one */ @@ -2228,12 +2228,13 @@ void * os2_alloc(size_t bytes) /* available. Otherwise we waste resources or possibly */ /* cause VirtualAlloc to fail (observed in Windows 2000 */ /* SP2). */ - result = (ptr_t) VirtualAlloc(NULL, bytes + VIRTUAL_ALLOC_PAD, - GetWriteWatch_alloc_flag + result = (ptr_t) VirtualAlloc(NULL, + SIZET_SAT_ADD(bytes, VIRTUAL_ALLOC_PAD), + GetWriteWatch_alloc_flag | (MEM_COMMIT | MEM_RESERVE) | GC_mem_top_down, - GC_pages_executable ? PAGE_EXECUTE_READWRITE : - PAGE_READWRITE); + GC_pages_executable ? PAGE_EXECUTE_READWRITE : + PAGE_READWRITE); # undef IGNORE_PAGES_EXECUTABLE } # endif /* !CYGWIN32 */ @@ -2271,7 +2272,7 @@ void * os2_alloc(size_t bytes) #ifdef MSWINCE - ptr_t GC_wince_get_mem(word bytes) + ptr_t GC_wince_get_mem(size_t bytes) { ptr_t result = 0; /* initialized to prevent warning. */ word i; @@ -2291,8 +2292,9 @@ void * os2_alloc(size_t bytes) if (i == GC_n_heap_bases) { /* Reserve more pages */ - word res_bytes = (bytes + GC_sysinfo.dwAllocationGranularity-1) - & ~(GC_sysinfo.dwAllocationGranularity-1); + size_t res_bytes = + SIZET_SAT_ADD(bytes, (size_t)GC_sysinfo.dwAllocationGranularity-1) + & ~((size_t)GC_sysinfo.dwAllocationGranularity-1); /* If we ever support MPROTECT_VDB here, we will probably need to */ /* ensure that res_bytes is strictly > bytes, so that VirtualProtect */ /* never spans regions. It seems to be OK for a VirtualFree */ @@ -3115,7 +3117,7 @@ STATIC void GC_default_push_other_roots( char * addr = (char *) (exc_info -> ExceptionRecord -> ExceptionInformation[1]); # endif - unsigned i; + size_t i; if (SIG_OK && CODE_OK) { register struct hblk * h = @@ -4286,7 +4288,7 @@ catch_exception_raise(mach_port_t except kern_return_t r; char *addr; struct hblk *h; - unsigned int i; + size_t i; thread_state_flavor_t flavor = DARWIN_EXC_STATE; mach_msg_type_number_t exc_state_count = DARWIN_EXC_STATE_COUNT; DARWIN_EXC_STATE_T exc_state; Index: gc-7.2/typd_mlc.c =================================================================== --- gc-7.2.orig/typd_mlc.c +++ gc-7.2/typd_mlc.c @@ -587,7 +587,7 @@ GC_API void * GC_CALL GC_malloc_explicit size_t lg; DCL_LOCK_STATE; - lb += TYPD_EXTRA_BYTES; + lb = SIZET_SAT_ADD(lb, TYPD_EXTRA_BYTES); if(SMALL_OBJ(lb)) { lg = GC_size_map[lb]; opp = &(GC_eobjfreelist[lg]); @@ -622,7 +622,7 @@ GC_API void * GC_CALL GC_malloc_explicit size_t lg; DCL_LOCK_STATE; - lb += TYPD_EXTRA_BYTES; + lb = SIZET_SAT_ADD(lb, TYPD_EXTRA_BYTES); if( SMALL_OBJ(lb) ) { lg = GC_size_map[lb]; opp = &(GC_eobjfreelist[lg]); @@ -649,6 +649,15 @@ GC_API void * GC_CALL GC_malloc_explicit return((void *) op); } +#include <limits.h> +#ifdef SIZE_MAX +# define GC_SIZE_MAX SIZE_MAX +#else +# define GC_SIZE_MAX (~(size_t)0) +#endif + +#define GC_SQRT_SIZE_MAX ((1U << (WORDSZ / 2)) - 1) + GC_API void * GC_CALL GC_calloc_explicitly_typed(size_t n, size_t lb, GC_descr d) { @@ -663,16 +672,20 @@ GC_API void * GC_CALL GC_calloc_explicit descr_type = GC_make_array_descriptor((word)n, (word)lb, d, &simple_descr, &complex_descr, &leaf); + if ((lb | n) > GC_SQRT_SIZE_MAX /* fast initial check */ + && lb > 0 && n > GC_SIZE_MAX / lb) + return NULL; /* n*lb overflow */ + lb *= n; switch(descr_type) { case NO_MEM: return(0); - case SIMPLE: return(GC_malloc_explicitly_typed(n*lb, simple_descr)); + case SIMPLE: + return GC_malloc_explicitly_typed(lb, simple_descr); case LEAF: - lb *= n; - lb += sizeof(struct LeafDescriptor) + TYPD_EXTRA_BYTES; + lb = SIZET_SAT_ADD(lb, + sizeof(struct LeafDescriptor) + TYPD_EXTRA_BYTES); break; case COMPLEX: - lb *= n; - lb += TYPD_EXTRA_BYTES; + lb = SIZET_SAT_ADD(lb, TYPD_EXTRA_BYTES); break; } if( SMALL_OBJ(lb) ) {
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