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| author | Jeff Johnston <jjohnstn@redhat.com> | 2003-08-19 18:09:54 +0000 |
|---|---|---|
| committer | Jeff Johnston <jjohnstn@redhat.com> | 2003-08-19 18:09:54 +0000 |
| commit | 8f0211142c47ce7d96d99ada5c673cbb056bad22 (patch) | |
| tree | 1123232259f0ed4e9111c846d7dd3025d9ebf780 | |
| parent | b16bb18af4f68f701c2394f170a7f4dc60bdddec (diff) | |
| download | newlib-8f0211142c47ce7d96d99ada5c673cbb056bad22.zip newlib-8f0211142c47ce7d96d99ada5c673cbb056bad22.tar.gz newlib-8f0211142c47ce7d96d99ada5c673cbb056bad22.tar.bz2 | |
2003-08-19 Jeff Johnston <jjohnstn@redhat.com>
* libc/stdlib/mallocr.c (mALLOc, rEALLOc, mEMEALIGn): Enhance
overflow detection.
| -rw-r--r-- | newlib/ChangeLog | 5 | ||||
| -rw-r--r-- | newlib/libc/stdlib/mallocr.c | 9 |
2 files changed, 12 insertions, 2 deletions
diff --git a/newlib/ChangeLog b/newlib/ChangeLog index 8136a77..727d31a 100644 --- a/newlib/ChangeLog +++ b/newlib/ChangeLog @@ -1,3 +1,8 @@ +2003-08-19 Jeff Johnston <jjohnstn@redhat.com> + + * libc/stdlib/mallocr.c (mALLOc, rEALLOc, mEMEALIGn): Enhance + overflow detection. + 2003-08-13 Aldy Hernandez <aldyh@redhat.com> * libc/machine/powerpc/machine/stdlib.h: Wrap SPE functions in diff --git a/newlib/libc/stdlib/mallocr.c b/newlib/libc/stdlib/mallocr.c index 5e10457..08a3b00 100644 --- a/newlib/libc/stdlib/mallocr.c +++ b/newlib/libc/stdlib/mallocr.c @@ -2334,7 +2334,7 @@ Void_t* mALLOc(RARG bytes) RDECL size_t bytes; INTERNAL_SIZE_T nb = request2size(bytes); /* padded request size; */ /* Check for overflow and just fail, if so. */ - if (nb > INT_MAX) + if (nb > INT_MAX || nb < bytes) return 0; MALLOC_LOCK; @@ -2797,7 +2797,7 @@ Void_t* rEALLOc(RARG oldmem, bytes) RDECL Void_t* oldmem; size_t bytes; nb = request2size(bytes); /* Check for overflow and just fail, if so. */ - if (nb > INT_MAX) + if (nb > INT_MAX || nb < bytes) return 0; #if HAVE_MMAP @@ -3028,6 +3028,11 @@ Void_t* mEMALIGn(RARG alignment, bytes) RDECL size_t alignment; size_t bytes; /* Call malloc with worst case padding to hit alignment. */ nb = request2size(bytes); + + /* Check for overflow. */ + if (nb > INT_MAX || nb < bytes) + return 0; + m = (char*)(mALLOc(RCALL nb + alignment + MINSIZE)); if (m == 0) return 0; /* propagate failure */ |