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authorHoeun Ryu <hoeun.ryu@gmail.com>2017-02-12 07:13:33 +0100
committerKees Cook <keescook@chromium.org>2017-02-17 01:34:59 +0100
commit4fbfeb8bd684d564bddeff1e3723d3d9f99aa5de (patch)
treeacd71c212dec8ad0f3117b33c5c37ff9e68b1183 /lib/iommu-helper.c
parentLinux 4.10-rc2 (diff)
downloadlinux-4fbfeb8bd684d564bddeff1e3723d3d9f99aa5de.tar.xz
linux-4fbfeb8bd684d564bddeff1e3723d3d9f99aa5de.zip
usercopy: add testcases to check zeroing on failure
During usercopy the destination buffer will be zeroed if copy_from_user() or get_user() fails. This patch adds testcases for it. The destination buffer is set with non-zero value before illegal copy_from_user() or get_user() is executed and the buffer is compared to zero after usercopy is done. Signed-off-by: Hoeun Ryu <hoeun.ryu@gmail.com> [kees: clarified commit log, dropped second kmalloc] Signed-off-by: Kees Cook <keescook@chromium.org>
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