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authorRik van Riel <riel@redhat.com>2017-07-12 23:36:20 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-13 01:26:03 +0200
commit7cd815bce828220deffd1654265f0ef891567774 (patch)
treebfbd9644275ac2ea061ad8c8eb53f92fd237fb66 /arch
parentrandom,stackprotect: introduce get_random_canary function (diff)
downloadlinux-7cd815bce828220deffd1654265f0ef891567774.tar.xz
linux-7cd815bce828220deffd1654265f0ef891567774.zip
fork,random: use get_random_canary() to set tsk->stack_canary
Use the ascii-armor canary to prevent unterminated C string overflows from being able to successfully overwrite the canary, even if they somehow obtain the canary value. Inspired by execshield ascii-armor and Daniel Micay's linux-hardened tree. Link: http://lkml.kernel.org/r/20170524155751.424-3-riel@redhat.com Signed-off-by: Rik van Riel <riel@redhat.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: Daniel Micay <danielmicay@gmail.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Ingo Molnar <mingo@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
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