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| author | Ingo Molnar <mingo@elte.hu> | 2009-09-02 21:42:56 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-02 21:42:59 +0200 |
| commit | f76bd108e5031202bb40849306f98c4afebe4ef6 (patch) | |
| tree | 455e14a23642a82513eebd4e4f7d3b76842869cd /security/selinux/hooks.c | |
| parent | cd6feeeafddbef6abfe4d90fb26e42fd844d34ed (diff) | |
| parent | eced1dfcfcf6b0a35e925d73916a9d8e36ab5457 (diff) | |
| download | kernel-crypto-f76bd108e5031202bb40849306f98c4afebe4ef6.tar.gz kernel-crypto-f76bd108e5031202bb40849306f98c4afebe4ef6.tar.xz kernel-crypto-f76bd108e5031202bb40849306f98c4afebe4ef6.zip | |
Merge branch 'perfcounters/urgent' into perfcounters/core
Merge reason: We are going to modify a place modified by
perfcounters/urgent.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'security/selinux/hooks.c')
| -rw-r--r-- | security/selinux/hooks.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 1e8cfc4c2ed..8d8b69c5664 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -3030,9 +3030,21 @@ static int selinux_file_mmap(struct file *file, unsigned long reqprot, int rc = 0; u32 sid = current_sid(); - if (addr < mmap_min_addr) + /* + * notice that we are intentionally putting the SELinux check before + * the secondary cap_file_mmap check. This is such a likely attempt + * at bad behaviour/exploit that we always want to get the AVC, even + * if DAC would have also denied the operation. + */ + if (addr < CONFIG_LSM_MMAP_MIN_ADDR) { rc = avc_has_perm(sid, sid, SECCLASS_MEMPROTECT, MEMPROTECT__MMAP_ZERO, NULL); + if (rc) + return rc; + } + + /* do DAC check on address space usage */ + rc = cap_file_mmap(file, reqprot, prot, flags, addr, addr_only); if (rc || addr_only) return rc; |