Messages in this thread Patch in this message | | | From | maximilian attems <> | Subject | [PATCH] Kconfig: enhance DEFAULT_MMAP_MIN_ADDR description | Date | Wed, 16 Apr 2008 19:13:44 +0200 |
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Got burned by setting the proposed default of 65536 across all Debian archs.
Thus proposing to be more specific on which archs you may set this. Also propose a value for arm and friends that doesn't break sshd.
Signed-off-by: maximilian attems <max@stro.at> Cc: Martin Michlmayr <tbm@cyrius.com> Cc: Gordon Farquharson <gordonfarquharson@gmail.com> --- security/Kconfig | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/security/Kconfig b/security/Kconfig index 5dfc206..cc1e4bd 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -113,8 +113,9 @@ config SECURITY_DEFAULT_MMAP_MIN_ADDR from userspace allocation. Keeping a user from writing to low pages can help reduce the impact of kernel NULL pointer bugs. - For most users with lots of address space a value of 65536 is - reasonable and should cause no problems. Programs which use vm86 + For most x86 users with lots of address space a value of 65536 is + reasonable and should cause no problems. On arm and other archs + it should not be higher than 32768. Programs which use vm86 functionality would either need additional permissions from either the LSM or the capabilities module or have this protection disabled. -- 1.5.5
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