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| author | Yann Sionneau <yann@sionneau.net> | 2020-12-20 19:15:14 +0100 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2020-12-23 13:39:37 +0100 |
| commit | 015d5b8c1a75b551f7f0215543fac01d55abfc0f (patch) | |
| tree | 3e05dba60292a9fd46c9eacdec99a7c7d8a2442f /libc/stdio/__freading.c | |
| parent | 6993d9378224489b49325bd1fb962f0e8bb935f1 (diff) | |
stdlib: fix potential UB and integer overflow with huge allocations using malloc-simple allocator
Two things are fixed by this commit:
1/ It is wrong to allocate an object of size > PTRDIFF_MAX.
It is explained in this thread: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63303
2/ There was a possible integer overflow in both malloc() and memalign() implementations
of stdlib/malloc-simple.
The malloc() integer overflow issue is fixed by the side effect of fixing the PTRDIFF_MAX issue.
The memalign() one is fixed by adding a comparison.
Signed-off-by: Yann Sionneau <yann@sionneau.net>
Diffstat (limited to 'libc/stdio/__freading.c')
0 files changed, 0 insertions, 0 deletions