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author | Al Viro <viro@zeniv.linux.org.uk> | 2009-12-16 01:01:38 -0500 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2009-12-16 12:16:45 -0500 |
commit | b75b5086be6504132eadb22a907854e0bf52e365 (patch) | |
tree | b9859bcb09d12bb2a1dcfd5c3cecf303c2c02d1b /fs | |
parent | 6e6b1bd1e739faf4fa259fc0d8bfcadea2493222 (diff) | |
download | kernel_samsung_smdk4412-b75b5086be6504132eadb22a907854e0bf52e365.zip kernel_samsung_smdk4412-b75b5086be6504132eadb22a907854e0bf52e365.tar.gz kernel_samsung_smdk4412-b75b5086be6504132eadb22a907854e0bf52e365.tar.bz2 |
Sanitize exec_permission_lite()
Use the sucker in other places in pathname resolution
that check MAY_EXEC for directories; lose the _lite
from name, it's equivalent of full-blown inode_permission()
for its callers (albeit still lighter, since large parts
of generic_permission() do not apply for pure MAY_EXEC).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/namei.c | 17 |
1 files changed, 8 insertions, 9 deletions
@@ -412,16 +412,15 @@ do_revalidate(struct dentry *dentry, struct nameidata *nd) } /* - * Short-cut version of permission(), for calling by - * path_walk(), when dcache lock is held. Combines parts - * of permission() and generic_permission(), and tests ONLY for - * MAY_EXEC permission. + * Short-cut version of permission(), for calling on directories + * during pathname resolution. Combines parts of permission() + * and generic_permission(), and tests ONLY for MAY_EXEC permission. * * If appropriate, check DAC only. If not appropriate, or - * short-cut DAC fails, then call permission() to do more + * short-cut DAC fails, then call ->permission() to do more * complete permission check. */ -static int exec_permission_lite(struct inode *inode) +static int exec_permission(struct inode *inode) { int ret; @@ -807,7 +806,7 @@ static int link_path_walk(const char *name, struct nameidata *nd) unsigned int c; nd->flags |= LOOKUP_CONTINUE; - err = exec_permission_lite(inode); + err = exec_permission(inode); if (err) break; @@ -1155,7 +1154,7 @@ static struct dentry *lookup_hash(struct nameidata *nd) { int err; - err = inode_permission(nd->path.dentry->d_inode, MAY_EXEC); + err = exec_permission(nd->path.dentry->d_inode); if (err) return ERR_PTR(err); return __lookup_hash(&nd->last, nd->path.dentry, nd); @@ -1205,7 +1204,7 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len) if (err) return ERR_PTR(err); - err = inode_permission(base->d_inode, MAY_EXEC); + err = exec_permission(base->d_inode); if (err) return ERR_PTR(err); return __lookup_hash(&this, base, NULL); |