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Accept leading and trailing spaces in getdate input string

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Fixes #15346.

The POSIX description of getdate allows for extra spaces in the
getdate input string.  __getdate_r uses strptime internally, which
works fine with extra spaces between format strings (and hence within
an input string) but not with leading and trailing spaces.  So we trim
off the leading and trailing spaces before we pass it on to strptime.
This commit is contained in:
Siddhesh Poyarekar 2013-04-10 11:31:46 +05:30
parent 61c23e6234
commit abe7f530bf
4 changed files with 57 additions and 1 deletions
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10
ChangeLog
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@ -1,3 +1,13 @@
2013-04-10 Siddhesh Poyarekar <siddhesh@redhat.com>
Roland McGrath <roland@hack.frob.com>
Ondrej Bilka <neleai@seznam.cz>
[BZ #15346]
* time/getdate.c: Include ctype.h and alloca.h.
(__getdate_r): Trim leading and trailing spaces of input.
* time/tst-getdate.c (tests): Add tests with leading and
trailing spaces.
2013-04-08 Roland McGrath <roland@hack.frob.com>
[BZ #14280]

2
NEWS
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@ -14,7 +14,7 @@ Version 2.18
14981, 14982, 14985, 14994, 14996, 15003, 15006, 15020, 15023, 15036,
15054, 15055, 15062, 15078, 15160, 15214, 15232, 15234, 15283, 15285,
15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336, 15337,
15342.
15342, 15346.
* CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
#15078).

42
time/getdate.c
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@ -25,6 +25,8 @@
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
#include <ctype.h>
#include <alloca.h>
#define TM_YEAR_BASE 1900
@ -135,6 +137,44 @@ __getdate_r (const char *string, struct tm *tp)
/* No threads reading this stream. */
__fsetlocking (fp, FSETLOCKING_BYCALLER);
/* Skip leading whitespace. */
while (isspace (*string))
string++;
size_t inlen, oldlen;
oldlen = inlen = strlen (string);
/* Skip trailing whitespace. */
while (inlen > 0 && isspace (string[inlen - 1]))
inlen--;
char *instr = NULL;
if (inlen < oldlen)
{
bool using_malloc = false;
if (__libc_use_alloca (inlen + 1))
instr = alloca (inlen + 1);
else
{
instr = malloc (inlen + 1);
if (instr == NULL)
{
fclose (fp);
return 6;
}
using_malloc = true;
}
memcpy (instr, string, inlen);
instr[inlen] = '\0';
string = instr;
if (!using_malloc)
instr = NULL;
}
line = NULL;
len = 0;
do
@ -159,6 +199,8 @@ __getdate_r (const char *string, struct tm *tp)
}
while (!feof_unlocked (fp));
free (instr);
/* Free the buffer. */
free (line);

4
time/tst-getdate.c
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@ -31,6 +31,10 @@ static const struct
} tests [] =
{
{"21:01:10 1999-1-31", "Universal", 0, {10, 1, 21, 31, 0, 99, 0, 0, 0}},
{"21:01:10 1999-1-31", "Universal", 0, {10, 1, 21, 31, 0, 99, 0, 0, 0}},
{" 21:01:10 1999-1-31", "Universal", 0, {10, 1, 21, 31, 0, 99, 0, 0, 0}},
{"21:01:10 1999-1-31 ", "Universal", 0, {10, 1, 21, 31, 0, 99, 0, 0, 0}},
{" 21:01:10 1999-1-31 ", "Universal", 0, {10, 1, 21, 31, 0, 99, 0, 0, 0}},
{"21:01:10 1999-2-28", "Universal", 0, {10, 1, 21, 28, 1, 99, 0, 0, 0}},
{"16:30:46 2000-2-29", "Universal", 0, {46, 30,16, 29, 1, 100, 0, 0, 0}},
{"01-08-2000 05:06:07", "Europe/Berlin", 0, {7, 6, 5, 1, 7, 100, 0, 0, 0}}