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(parent: 0c744ea) | patch
usercopy: add testcases to check zeroing on failure
authorHoeun Ryu <hoeun.ryu@gmail.com>
Sun, 12 Feb 2017 06:13:33 +0000 (15:13 +0900)
committerKees Cook <keescook@chromium.org>
Fri, 17 Feb 2017 00:34:59 +0000 (16:34 -0800)
commit4fbfeb8bd684d564bddeff1e3723d3d9f99aa5de
treeacd71c212dec8ad0f3117b33c5c37ff9e68b1183tree | snapshot
parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88commit | diff
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>
lib/test_user_copy.c diff | blob | history
Domain: System / Kernel;