diff options
| author | James Morris <jmorris@namei.org> | 2006-04-26 15:11:00 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-05-01 12:03:44 -0700 |
| commit | 9120b4470e2e57f196a0e470898ae628725fb4c2 (patch) | |
| tree | ad144b3fee2d7a0be16181226f1de751e010f6ba | |
| parent | 41fd2d35389e0fc809d696f352d7c44850d5a67b (diff) | |
[PATCH] LSM: add missing hook to do_compat_readv_writev()
This patch addresses a flaw in LSM, where there is no mediation of readv()
and writev() in for 32-bit compatible apps using a 64-bit kernel.
This bug was discovered and fixed initially in the native readv/writev
code [1], but was not fixed in the compat code. Thanks to Al for spotting
this one.
[1] http://lwn.net/Articles/154282/
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
| -rw-r--r-- | fs/compat.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/compat.c b/fs/compat.c index 5333c7d7427f..04f6fb53340c 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -1215,6 +1215,10 @@ static ssize_t compat_do_readv_writev(int type, struct file *file, if (ret < 0) goto out; + ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE); + if (ret) + goto out; + fnv = NULL; if (type == READ) { fn = file->f_op->read; |