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| author | Marcel Böhme <boehme.marcel@gmail.com> | 2016-04-08 12:10:21 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2016-04-08 12:10:21 +0000 |
| commit | bdf66f7734daf0d2a8f53eb5a1a94a94a28246fc (patch) | |
| tree | cfa89c5025da2434c49ea375c858dac4c4e7233d /libiberty/cplus-dem.c | |
| parent | 59dad006fa31fe3355defcd6b38ab70fd7d2737f (diff) | |
| download | gcc-bdf66f7734daf0d2a8f53eb5a1a94a94a28246fc.zip gcc-bdf66f7734daf0d2a8f53eb5a1a94a94a28246fc.tar.gz gcc-bdf66f7734daf0d2a8f53eb5a1a94a94a28246fc.tar.bz2 | |
Fix memory allocation size overflows (PR69687, patch by Marcel Böhme)
PR c++/69687
* cplus-dem.c: Include <limits.h> if available.
(INT_MAX): Define if necessary.
(remember_type, remember_Ktype, register_Btype, string_need):
Abort if we detect cases where we the size of the allocation would
overflow.
From-SVN: r234829
Diffstat (limited to 'libiberty/cplus-dem.c')
| -rw-r--r-- | libiberty/cplus-dem.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/libiberty/cplus-dem.c b/libiberty/cplus-dem.c index abba234..7514e57 100644 --- a/libiberty/cplus-dem.c +++ b/libiberty/cplus-dem.c @@ -56,6 +56,13 @@ void * malloc (); void * realloc (); #endif +#ifdef HAVE_LIMITS_H +#include <limits.h> +#endif +#ifndef INT_MAX +# define INT_MAX (int)(((unsigned int) ~0) >> 1) /* 0x7FFFFFFF */ +#endif + #include <demangle.h> #undef CURRENT_DEMANGLING_STYLE #define CURRENT_DEMANGLING_STYLE work->options @@ -4261,6 +4268,8 @@ remember_type (struct work_stuff *work, const char *start, int len) } else { + if (work -> typevec_size > INT_MAX / 2) + xmalloc_failed (INT_MAX); work -> typevec_size *= 2; work -> typevec = XRESIZEVEC (char *, work->typevec, work->typevec_size); @@ -4288,6 +4297,8 @@ remember_Ktype (struct work_stuff *work, const char *start, int len) } else { + if (work -> ksize > INT_MAX / 2) + xmalloc_failed (INT_MAX); work -> ksize *= 2; work -> ktypevec = XRESIZEVEC (char *, work->ktypevec, work->ksize); @@ -4317,6 +4328,8 @@ register_Btype (struct work_stuff *work) } else { + if (work -> bsize > INT_MAX / 2) + xmalloc_failed (INT_MAX); work -> bsize *= 2; work -> btypevec = XRESIZEVEC (char *, work->btypevec, work->bsize); @@ -4771,6 +4784,8 @@ string_need (string *s, int n) else if (s->e - s->p < n) { tem = s->p - s->b; + if (n > INT_MAX / 2 - tem) + xmalloc_failed (INT_MAX); n += tem; n *= 2; s->b = XRESIZEVEC (char, s->b, n); |