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| author | Miklos Szeredi <miklos@szeredi.hu> | 2005-11-28 13:44:16 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-28 14:42:26 -0800 |
| commit | 2827d0b23b7279d0a717eea4029efeef2e1b0183 (patch) | |
| tree | 3d4be5d41404eec385027f434a83abad7f28111d /fs/fuse/dir.c | |
| parent | f007d5c961448170d0ec2998b1a80eef054b6235 (diff) | |
| download | lwn-2827d0b23b7279d0a717eea4029efeef2e1b0183.tar.gz lwn-2827d0b23b7279d0a717eea4029efeef2e1b0183.zip | |
[PATCH] fuse: check for invalid node ID in fuse_create_open()
Check for invalid node ID values in the new atomic create+open method.
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/fuse/dir.c')
| -rw-r--r-- | fs/fuse/dir.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 3a47247a889e..51f5da652771 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -87,6 +87,11 @@ static int dir_alias(struct inode *inode) return 0; } +static inline int invalid_nodeid(u64 nodeid) +{ + return !nodeid || nodeid == FUSE_ROOT_ID; +} + static struct dentry_operations fuse_dentry_operations = { .d_revalidate = fuse_dentry_revalidate, }; @@ -110,7 +115,7 @@ static int fuse_lookup_iget(struct inode *dir, struct dentry *entry, fuse_lookup_init(req, dir, entry, &outarg); request_send(fc, req); err = req->out.h.error; - if (!err && (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID)) + if (!err && invalid_nodeid(outarg.nodeid)) err = -EIO; if (!err) { inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation, @@ -206,7 +211,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode, } err = -EIO; - if (!S_ISREG(outentry.attr.mode)) + if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid)) goto out_free_ff; inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation, @@ -263,7 +268,7 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req, fuse_put_request(fc, req); return err; } - if (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID) { + if (invalid_nodeid(outarg.nodeid)) { fuse_put_request(fc, req); return -EIO; } |