From 343a2a558153318b37de5fa6afc2d656739f0eed Mon Sep 17 00:00:00 2001 From: Corinna Vinschen Date: Wed, 21 Feb 2024 19:39:37 +0100 Subject: Cygwin: strptime: make sure to fail on invalid input digits conv_num returns NULL if the input is invalid, e. g., the numbers are out of range. However, the code fails to test this in a lot of places. Rather than adding checks all over the place, rename conv_num to __conv_num and create a wrapper macro conv_num to perform the task of error checking. Signed-off-by: Corinna Vinschen --- winsup/cygwin/libc/strptime.cc | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) (limited to 'winsup/cygwin') diff --git a/winsup/cygwin/libc/strptime.cc b/winsup/cygwin/libc/strptime.cc index dc55723..353b800 100644 --- a/winsup/cygwin/libc/strptime.cc +++ b/winsup/cygwin/libc/strptime.cc @@ -301,10 +301,19 @@ first_day (int year) return ret; } -/* This simplifies the calls to conv_num enormously. */ +/* This simplifies the calls to __conv_num enormously. */ #define ALT_DIGITS ((alt_format & ALT_O) ? *alt_digits : NULL) -static const unsigned char *conv_num(const unsigned char *, int *, uint, uint, +#define conv_num(_b,_d,_l,_u,_a) \ + ({ \ + const unsigned char *_ret; \ + _ret = __conv_num((_b),(_d),(_l),(_u),(_a)); \ + if (!_ret) \ + return NULL; \ + _ret; \ + }) + +static const unsigned char *__conv_num(const unsigned char *, int *, uint, uint, alt_digits_t *); static const unsigned char *find_string(const unsigned char *, int *, const char * const *, @@ -842,7 +851,7 @@ strptime (const char *__restrict buf, const char *__restrict fmt, } static const unsigned char * -conv_num(const unsigned char *buf, int *dest, uint llim, uint ulim, +__conv_num(const unsigned char *buf, int *dest, uint llim, uint ulim, alt_digits_t *alt_digits) { uint result = 0; -- cgit v1.1