diff options
| author | Jeff Mahoney <jeffm@suse.com> | 2008-05-02 15:03:58 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:04:02 -0400 |
| commit | 12fa8ec64f445aa932ba154053fe95432f30f2c6 (patch) | |
| tree | bcc8b5799bfb81da13bc6ce7a65b281e7374dd5e /fs/btrfs/compat.h | |
| parent | bb8885cc0aa6b1606143d92c70762b16026016a5 (diff) | |
Btrfs: Add workaround for AppArmor changing remove_suid()
In openSUSE 10.3, AppArmor modifies remove_suid to take a struct path
rather than just a dentry. This patch tests that the kernel is openSUSE
10.3 or newer and adjusts the call accordingly.
Debian/Ubuntu with AppArmor applied will also need a similar patch.
Maintainers of btrfs under those distributions should build on this
patch or, alternatively, alter their package descriptions to add
-DREMOVE_SUID_PATH to the compiler command line.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
- --- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ b/compat.h 2008-02-06 16:46:13.000000000 -0500
@@ -0,0 +1,15 @@
+#ifndef _COMPAT_H_
+#define _COMPAT_H_
+
+
+/*
+ * Even if AppArmor isn't enabled, it still has different prototypes.
+ * Add more distro/version pairs here to declare which has AppArmor applied.
+ */
+#if defined(CONFIG_SUSE_KERNEL)
+# if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
+# define REMOVE_SUID_PATH 1
+# endif
+#endif
+
+#endif /* _COMPAT_H_ */
- --- a/file.c 2008-02-06 11:37:39.000000000 -0500
+++ b/file.c 2008-02-06 16:46:23.000000000 -0500
@@ -37,6 +37,7 @@
#include "ordered-data.h"
#include "ioctl.h"
#include "print-tree.h"
+#include "compat.h"
static int btrfs_copy_from_user(loff_t pos, int num_pages, int write_bytes,
@@ -790,7 +791,11 @@ static ssize_t btrfs_file_write(struct f
goto out_nolock;
if (count == 0)
goto out_nolock;
+#ifdef REMOVE_SUID_PATH
+ err = remove_suid(&file->f_path);
+#else
err = remove_suid(fdentry(file));
+#endif
if (err)
goto out_nolock;
file_update_time(file);
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/compat.h')
| -rw-r--r-- | fs/btrfs/compat.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/btrfs/compat.h b/fs/btrfs/compat.h new file mode 100644 index 000000000000..d39a768e65ff --- /dev/null +++ b/fs/btrfs/compat.h @@ -0,0 +1,25 @@ +#ifndef _COMPAT_H_ +#define _COMPAT_H_ + + +/* + * Even if AppArmor isn't enabled, it still has different prototypes. + * Add more distro/version pairs here to declare which has AppArmor applied. + */ +#if defined(CONFIG_SUSE_KERNEL) +# if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22) +# define REMOVE_SUID_PATH 1 +# endif +#endif + +/* + * catch any other distros that have patched in apparmor. This isn't + * 100% reliable because it won't catch people that hand compile their + * own distro kernels without apparmor compiled in. But, it is better + * than nothing. + */ +#ifdef CONFIG_SECURITY_APPARMOR +# define REMOVE_SUID_PATH 1 +#endif + +#endif /* _COMPAT_H_ */ |