From: Chen Gang Date: Mon, 15 Apr 2013 05:34:43 +0000 (+0930) Subject: kernel: kallsyms: memory override issue, need check destination buffer length X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~36^2~3 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e3f26752f0f8a6aade580115e1e68bcb1a4bc040;p=pandora-kernel.git kernel: kallsyms: memory override issue, need check destination buffer length We don't export any symbols > 128 characters, but if we did then kallsyms_expand_symbol() would overflow the buffer handed to it. So we need check destination buffer length when copying. the related test: if we define an EXPORT function which name more than 128. will panic when call kallsyms_lookup_name by init_kprobes on booting. after check the length (provide this patch), it is ok. Implementaion: add additional destination buffer length parameter (maxlen) if uncompressed string is too long (>= maxlen), it will be truncated. not check the parameters whether valid, since it is a static function. Signed-off-by: Chen Gang Signed-off-by: Rusty Russell --- Reading git-diff-tree failed