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Fix extension of array in extended printf format handling

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This commit is contained in:
Ulrich Drepper 2011-12-17 21:27:25 -05:00
parent f0b264f174
commit a4647e727a
3 changed files with 13 additions and 9 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2011-12-17 Ulrich Drepper <drepper@gmail.com>
[BZ #13446]
* stdio-common/vfprintf.c (vfprintf): Fix extension of specs array.
2011-11-22 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
* sysdeps/powerpc/Makefile: Added locale-defines.sym generation.

4
NEWS
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@ -12,8 +12,8 @@ Version 2.15
6779, 6783, 9696, 10103, 10709, 11589, 12403, 12847, 12868, 12852, 12874,
12885, 12892, 12907, 12922, 12935, 13007, 13021, 13067, 13068, 13090,
13092, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13179, 13192,
13268, 13276, 13291, 13335, 13337, 13344, 13358, 13367, 13472, 13484,
13506
13268, 13276, 13291, 13335, 13337, 13344, 13358, 13367, 13446, 13472,
13484, 13506
* New program pldd to list loaded object of a process
Implemented by Ulrich Drepper.

13
stdio-common/vfprintf.c
View File

@ -1640,9 +1640,9 @@ do_positional:
/* Array with information about the needed arguments. This has to
be dynamically extensible. */
size_t nspecs = 0;
size_t nspecs_max = 32; /* A more or less arbitrary start value. */
struct printf_spec *specs
= alloca (nspecs_max * sizeof (struct printf_spec));
/* A more or less arbitrary start value. */
size_t nspecs_size = 32 * sizeof (struct printf_spec);
struct printf_spec *specs = alloca (nspecs_size);
/* The number of arguments the format string requests. This will
determine the size of the array needed to store the argument
@ -1679,15 +1679,14 @@ do_positional:
for (f = lead_str_end; *f != L_('\0'); f = specs[nspecs++].next_fmt)
{
if (nspecs >= nspecs_max)
if (nspecs * sizeof (*specs) >= nspecs_size)
{
/* Extend the array of format specifiers. */
struct printf_spec *old = specs;
specs = extend_alloca (specs, nspecs_max,
2 * nspecs_max * sizeof (*specs));
specs = extend_alloca (specs, nspecs_size, 2 * nspecs_size);
/* Copy the old array's elements to the new space. */
memmove (specs, old, nspecs * sizeof (struct printf_spec));
memmove (specs, old, nspecs * sizeof (*specs));
}
/* Parse the format specifier. */