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authorDavid Herrmann <dh.herrmann@gmail.com>2018-11-14 14:16:42 +0100
committerJiri Kosina <jkosina@suse.cz>2018-11-19 14:32:27 +0100
commit4d26d1d1e8065bb3326a7c06d5d4698e581443a9 (patch)
treef1a9ff9487e6984b11310d08d43f37c207ee7b66 /mm
parent8c01db7619f07c85c5cd81ec5eb83608b56c88f5 (diff)
downloadlinux-4d26d1d1e8065bb3326a7c06d5d4698e581443a9.tar.bz2
Revert "HID: uhid: use strlcpy() instead of strncpy()"
This reverts commit 336fd4f5f25157e9e8bd50e898a1bbcd99eaea46. Please note that `strlcpy()` does *NOT* do what you think it does. strlcpy() *ALWAYS* reads the full input string, regardless of the 'length' parameter. That is, if the input is not zero-terminated, strlcpy() will *READ* beyond input boundaries. It does this, because it always returns the size it *would* copy if the target was big enough, not the truncated size it actually copied. The original code was perfectly fine. The hid device is zero-initialized and the strncpy() functions copied up to n-1 characters. The result is always zero-terminated this way. This is the third time someone tried to replace strncpy with strlcpy in this function, and gets it wrong. I now added a comment that should at least make people reconsider. Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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