diff options
| author | Eric Paris <eparis@redhat.com> | 2009-07-31 12:54:11 -0400 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2009-08-06 09:02:23 +1000 |
| commit | a2551df7ec568d87793d2eea4ca744e86318f205 (patch) | |
| tree | 3bdd4257bf757d9d1d64d9d7aa10cd144cd3a657 /security/commoncap.c | |
| parent | 84336d1a77ccd2c06a730ddd38e695c2324a7386 (diff) | |
| download | lwn-a2551df7ec568d87793d2eea4ca744e86318f205.tar.gz lwn-a2551df7ec568d87793d2eea4ca744e86318f205.zip | |
Security/SELinux: seperate lsm specific mmap_min_addr
Currently SELinux enforcement of controls on the ability to map low memory
is determined by the mmap_min_addr tunable. This patch causes SELinux to
ignore the tunable and instead use a seperate Kconfig option specific to how
much space the LSM should protect.
The tunable will now only control the need for CAP_SYS_RAWIO and SELinux
permissions will always protect the amount of low memory designated by
CONFIG_LSM_MMAP_MIN_ADDR.
This allows users who need to disable the mmap_min_addr controls (usual reason
being they run WINE as a non-root user) to do so and still have SELinux
controls preventing confined domains (like a web server) from being able to
map some area of low memory.
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/commoncap.c')
| -rw-r--r-- | security/commoncap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/security/commoncap.c b/security/commoncap.c index 3852e9432801..fe30751a6cd9 100644 --- a/security/commoncap.c +++ b/security/commoncap.c @@ -1005,7 +1005,7 @@ int cap_file_mmap(struct file *file, unsigned long reqprot, { int ret = 0; - if (addr < mmap_min_addr) { + if (addr < dac_mmap_min_addr) { ret = cap_capable(current, current_cred(), CAP_SYS_RAWIO, SECURITY_CAP_AUDIT); /* set PF_SUPERPRIV if it turns out we allow the low mmap */ |