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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2020-12-03 13:50:50 +0900 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-12-06 10:03:08 +0100 |
| commit | 12cb908a11b2544b5f53e9af856e6b6a90ed5533 (patch) | |
| tree | 3abacf4fb2d917d76e771296cf208588a9e81563 /arch/x86/kernel | |
| parent | 4e9a5ae8df5b3365183150f6df49e49dece80d8c (diff) | |
x86/insn-eval: Use new for_each_insn_prefix() macro to loop over prefixes bytes
Since insn.prefixes.nbytes can be bigger than the size of
insn.prefixes.bytes[] when a prefix is repeated, the proper check must
be
insn.prefixes.bytes[i] != 0 and i < 4
instead of using insn.prefixes.nbytes. Use the new
for_each_insn_prefix() macro which does it correctly.
Debugged by Kees Cook <keescook@chromium.org>.
[ bp: Massage commit message. ]
Fixes: 32d0b95300db ("x86/insn-eval: Add utility functions to get segment selector")
Reported-by: syzbot+9b64b619f10f19d19a7c@syzkaller.appspotmail.com
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/160697104969.3146288.16329307586428270032.stgit@devnote2
Diffstat (limited to 'arch/x86/kernel')
0 files changed, 0 insertions, 0 deletions