Re: [patch] Fix BZ 19165 -- overflow in fread / fwrite

[Paul Pluzhnikov <ppluzhnikov at google dot com>]

Ok, let's try one more time.

Previous attempt: https://sourceware.org/ml/libc-alpha/2015-10/msg00894.html
Tested on Linux/x86_64 with 6.0.0 (r222386).

Testing with (gcc-4.8 Ubuntu 4.8.4-2ubuntu1~14.04) 4:4.8.2-1ubuntu6
fails for apparently unrelated reasons:

build/math/test-double-vlen2-wrappers.o: In function `cos_vlen2':
/glibc-git/math/../sysdeps/x86_64/fpu/test-double-vlen2-wrappers.c:24:
undefined reference to `_ZGVbN2v_cos'
/glibc-git/build-system-gcc/math/test-double-vlen2-wrappers.o: In
function `sin_vlen2':
/glibc-git/math/../sysdeps/x86_64/fpu/test-double-vlen2-wrappers.c:25:
undefined reference to `_ZGVbN2v_sin'
... etc.

Thanks,


2015-12-07  Paul Pluzhnikov  <ppluzhnikov@google.com>

        [BZ #19165]
        * misc/sys/cdefs.h (__umul_size_t_overflow): New.
        (__umul_size_t_saturated): New.
        * libio/iofread.c (_IO_fread): Protect against overflow.
        * libio/iofread_u.c (__fread_unlocked): Likewise.
        * b/libio/iofwrite.c (_IO_fwrite): Likewise.
        * libio/iofwrite_u.c (fwrite_unlocked): Likewise.

-- 
Paul Pluzhnikov

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