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| author |   Mark Rutland <mark.rutland@arm.com> | 2015-03-04 13:27:35 +0000 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2015-03-19 10:43:57 +0000 |
| commit | b63dbef93f91d56cb4385fdd8d1765201d451136 (patch) | |
| tree | f984f35a54b63029f2e8e5598a46adff3a726010 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | arm64: fixmap: make FIX_TEXT_POKE0 permanent (diff) | |
| download | linux-dev-b63dbef93f91d56cb4385fdd8d1765201d451136.tar.xz linux-dev-b63dbef93f91d56cb4385fdd8d1765201d451136.zip | |
arm64: fixmap: check idx is definitely valid
Fixmap indices are in the interval (FIX_HOLE, __end_of_fixed_addresses),
but in __set_fixmap we only check idx <= __end_of_fixed_addresses, and
therefore indices <= FIX_HOLE are erroneously accepted. If called with
such an idx, __set_fixmap may corrupt page tables outside of the fixmap
region.
This patch ensures that we validate the idx against both endpoints of
the interval.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions