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| author | Andy Lutomirski <luto@amacapital.net> | 2014-06-23 14:22:15 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-07-11 13:33:54 +0100 |
| commit | bb99d6796995968ca6a42b17fbfb48d073bb234c (patch) | |
| tree | d7cadb68c0645153fe9690bb591cb7ab9d49c414 /mm | |
| parent | a8a2fdd030095e0dedb38c1c8dbbadb24ad89a6a (diff) | |
x86_32, entry: Do syscall exit work on badsys (CVE-2014-4508)
commit 554086d85e71f30abe46fc014fea31929a7c6a8a upstream.
The bad syscall nr paths are their own incomprehensible route
through the entry control flow. Rearrange them to work just like
syscalls that return -ENOSYS.
This fixes an OOPS in the audit code when fast-path auditing is
enabled and sysenter gets a bad syscall nr (CVE-2014-4508).
This has probably been broken since Linux 2.6.27:
af0575bba0 i386 syscall audit fast-path
Cc: Roland McGrath <roland@redhat.com>
Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/e09c499eade6fc321266dd6b54da7beb28d6991c.1403558229.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions