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Moving pointers could fail if realloc() allocates a new memory region

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where the difference between old and new address exceeds an int. Use
ptrdiff_t for calculations instead.
This commit is contained in:
mlelstv 2020-09-26 11:39:17 +00:00
parent b97b06c97c
commit 16a709a022
1 changed files with 3 additions and 3 deletions
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6
external/gpl2/grep/dist/lib/regex.c vendored
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@ -1,4 +1,4 @@
/* $NetBSD: regex.c,v 1.2 2016/01/10 22:16:40 christos Exp $ */
/* $NetBSD: regex.c,v 1.3 2020/09/26 11:39:17 mlelstv Exp $ */
/* Extended regular expression matching and search library,
version 0.12.
@ -2047,7 +2047,7 @@ static reg_errcode_t compile_range _RE_ARGS ((unsigned int range_start,
/* If the buffer moved, move all the pointers into it. */ \
if (old_buffer != COMPILED_BUFFER_VAR) \
{ \
int incr = COMPILED_BUFFER_VAR - old_buffer; \
ptrdiff_t incr = COMPILED_BUFFER_VAR - old_buffer; \
MOVE_BUFFER_POINTER (b); \
MOVE_BUFFER_POINTER (begalt); \
if (fixup_alt_jump) \
@ -2075,7 +2075,7 @@ static reg_errcode_t compile_range _RE_ARGS ((unsigned int range_start,
/* If the buffer moved, move all the pointers into it. */ \
if (old_buffer != COMPILED_BUFFER_VAR) \
{ \
int incr = COMPILED_BUFFER_VAR - old_buffer; \
ptrdiff_t incr = COMPILED_BUFFER_VAR - old_buffer; \
MOVE_BUFFER_POINTER (b); \
MOVE_BUFFER_POINTER (begalt); \
if (fixup_alt_jump) \