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Mend bug introduced in previous patch. Fixes crash detected by ClusterFuzz 

17101.
This commit is contained in:
Philip.Hazel 2019-09-10 13:22:08 +00:00
parent bf15267c30
commit 78fae97f6c
2 changed files with 16 additions and 9 deletions
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18
src/pcre2_compile.c
View File

@ -5585,7 +5585,7 @@ for (;; pptr++)
they are case partners. This can be optimized to generate a caseless single
character match (which also sets first/required code units if relevant). */
if (meta == META_CLASS && pptr[1] < META_END && pptr[2] < META_END &&
if (meta == META_CLASS && pptr[1] < META_END && pptr[2] < META_END &&
pptr[3] == META_CLASS_END)
{
uint32_t c = pptr[1];
@ -5594,10 +5594,18 @@ for (;; pptr++)
if (UCD_CASESET(c) == 0)
#endif
{
uint32_t d = TABLE_GET(c, cb->fcc, c);
uint32_t d;
#ifdef SUPPORT_UNICODE
if (utf && c > 127) d = UCD_OTHERCASE(c);
if (utf && c > 127) d = UCD_OTHERCASE(c); else
#endif
{
#if PCRE2_CODE_UNIT_WIDTH != 8
if (c > 255) d = c; else
#endif
d = TABLE_GET(c, cb->fcc, c);
}
if (c != d && pptr[2] == d)
{
pptr += 3; /* Move on to class end */
@ -5607,7 +5615,7 @@ for (;; pptr++)
reset_caseful = TRUE;
options |= PCRE2_CASELESS;
req_caseopt = REQ_CASELESS;
}
}
goto CLASS_CASELESS_CHAR;
}
}
@ -7892,7 +7900,7 @@ for (;; pptr++)
zeroreqcuflags = reqcuflags;
/* If the character is more than one code unit long, we can set a single
firstcu only if it is not to be matched caselessly. Multiple possible
firstcu only if it is not to be matched caselessly. Multiple possible
starting code units may be picked up later in the studying code. */
if (mclength == 1 || req_caseopt == 0)

7
src/pcre2_intmodedep.h
View File

@ -205,19 +205,19 @@ whether its argument, which is assumed to be one code unit, is less than 256.
The CHMAX_255 macro does not assume one code unit. The maximum length of a MARK
name must fit in one code unit; currently it is set to 255 or 65535. The
TABLE_GET macro is used to access elements of tables containing exactly 256
items. When code points can be greater than 255, a check is needed before
accessing these tables. */
items. Its argument is a code unit. When code points can be greater than 255, a
check is needed before accessing these tables. */
#if PCRE2_CODE_UNIT_WIDTH == 8
#define MAX_255(c) TRUE
#define MAX_MARK ((1u << 8) - 1)
#define TABLE_GET(c, table, default) ((table)[c])
#ifdef SUPPORT_UNICODE
#define SUPPORT_WIDE_CHARS
#define CHMAX_255(c) ((c) <= 255u)
#else
#define CHMAX_255(c) TRUE
#endif /* SUPPORT_UNICODE */
#define TABLE_GET(c, table, default) ((table)[c])
#else /* Code units are 16 or 32 bits */
#define CHMAX_255(c) ((c) <= 255u)
@ -228,7 +228,6 @@ accessing these tables. */
#endif
/* ----------------- Character-handling macros ----------------- */
/* There is a proposed future special "UTF-21" mode, in which only the lowest