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authorAl Viro <viro@zeniv.linux.org.uk>2008-07-15 21:03:57 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2008-07-26 20:53:14 -0400
commite6305c43eda10ebfd2ad9e35d6e172ccc7bb3695 (patch)
tree8a95bd0e27fb3ce895cca9ef91af2e1605e4cdab /kernel/sysctl.c
parent1bd5191d9f5d1928c4efdf604c4164b04bb88dbe (diff)
[PATCH] sanitize ->permission() prototype
* kill nameidata * argument; map the 3 bits in ->flags anybody cares about to new MAY_... ones and pass with the mask. * kill redundant gfs2_iop_permission() * sanitize ecryptfs_permission() * fix remaining places where ->permission() instances might barf on new MAY_... found in mask. The obvious next target in that direction is permission(9) folded fix for nfs_permission() breakage from Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/sysctl.c')
-rw-r--r--kernel/sysctl.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index ff5abcca5ddf..911d846f0503 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1516,9 +1516,9 @@ static int do_sysctl_strategy(struct ctl_table_root *root,
int op = 0, rc;
if (oldval)
- op |= 004;
+ op |= MAY_READ;
if (newval)
- op |= 002;
+ op |= MAY_WRITE;
if (sysctl_perm(root, table, op))
return -EPERM;
@@ -1560,7 +1560,7 @@ repeat:
if (n == table->ctl_name) {
int error;
if (table->child) {
- if (sysctl_perm(root, table, 001))
+ if (sysctl_perm(root, table, MAY_EXEC))
return -EPERM;
name++;
nlen--;
@@ -1635,7 +1635,7 @@ static int test_perm(int mode, int op)
mode >>= 6;
else if (in_egroup_p(0))
mode >>= 3;
- if ((mode & op & 0007) == op)
+ if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0)
return 0;
return -EACCES;
}
@@ -1645,7 +1645,7 @@ int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op)
int error;
int mode;
- error = security_sysctl(table, op);
+ error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC));
if (error)
return error;