| commit | df04abfd181acc276ba6762c8206891ae10ae00d | |
| author | Jiri Olsa <jolsa@kernel.org> | |
| Thu, 8 Sep 2016 07:57:08 +0000 (8 09:57 +0200) | ||
| committer | Linus Torvalds <torvalds@linux-foundation.org> | |
| Tue, 20 Sep 2016 20:32:49 +0000 (20 13:32 -0700) | ||
| tree | 03afe92ae5ef3e51035ab871e0b29742d11eb0d1 | treesnapshot (tar.gz zip) |
| parent | f5beeb1851ea6f8cfcf2657f26cb24c0582b4945 | commitdiff |
fs/proc/kcore.c: Add bounce buffer for ktext data
We hit hardened usercopy feature check for kernel text access by reading
kcore file:
usercopy: kernel memory exposure attempt detected from ffffffff8179a01f (<kernel text>) (4065 bytes)
kernel BUG at mm/usercopy.c:75!
Bypassing this check for kcore by adding bounce buffer for ktext data.
Reported-by: Steve Best <sbest@redhat.com>
Fixes: f5509cc18daa ("mm: Hardened usercopy")
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We hit hardened usercopy feature check for kernel text access by reading
kcore file:
usercopy: kernel memory exposure attempt detected from ffffffff8179a01f (<kernel text>) (4065 bytes)
kernel BUG at mm/usercopy.c:75!
Bypassing this check for kcore by adding bounce buffer for ktext data.
Reported-by: Steve Best <sbest@redhat.com>
Fixes: f5509cc18daa ("mm: Hardened usercopy")
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| fs/proc/kcore.c | diffblobblamehistory |