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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-12-14 09:05:46 -0200
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-12-19 12:02:36 -0200
commit3bb1ef58b989012f8199b82af6ec136da2f9fda3 (patch)
treed889f9c9f475b0941cf558ede5af73d5cefebc1b /sysvipc/sys
parent554e3d51efdd7d15c15876b80a7cba3ad9b6a738 (diff)
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ia64: Fix memchr for large input sizes (BZ #22603)
Current optimized ia64 memchr uses a strategy to check for last address by adding the input one with expected size. However it does not take care for possible overflow. It was triggered by 3038145ca23 where default rawmemchr now uses memchr (p, c, (size_t)-1). This patch fixes it by implement a satured addition where overflows sets the maximum pointer size to UINTPTR_MAX. Checked on ia64-linux-gnu where it fixes both stratcliff and test-rawmemchr failures. Adhemerval Zanella <adhemerval.zanella@linaro.org> James Clarke <jrtc27@jrtc27.com> [BZ #22603] * sysdeps/ia64/memchr.S (__memchr): Avoid overflow in pointer addition.
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