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Message-Id: <20191015103502.27691-1-ben.dooks@codethink.co.uk>
Date: Tue, 15 Oct 2019 11:35:02 +0100
From: Ben Dooks <ben.dooks@...ethink.co.uk>
To: linux-kernel@...ts.codethink.co.uk
Cc: Ben Dooks <ben.dooks@...ethink.co.uk>,
Alexander Viro <viro@...iv.linux.org.uk>,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] fs/namespace: add __user to open_tree and move_mount syscalls
Thw open_tree and move_mount syscalls take names from the
user, so add the __user to these to ensure the following
warnings from sparse are fixed:
fs/namespace.c:2392:35: warning: incorrect type in argument 2 (different address spaces)
fs/namespace.c:2392:35: expected char const [noderef] <asn:1> *name
fs/namespace.c:2392:35: got char const *filename
fs/namespace.c:3541:38: warning: incorrect type in argument 2 (different address spaces)
fs/namespace.c:3541:38: expected char const [noderef] <asn:1> *name
fs/namespace.c:3541:38: got char const *from_pathname
fs/namespace.c:3550:36: warning: incorrect type in argument 2 (different address spaces)
fs/namespace.c:3550:36: expected char const [noderef] <asn:1> *name
fs/namespace.c:3550:36: got char const *to_pathname
Signed-off-by: Ben Dooks <ben.dooks@...ethink.co.uk>
---
Cc: Alexander Viro <viro@...iv.linux.org.uk>
Cc: linux-fsdevel@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
fs/namespace.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/namespace.c b/fs/namespace.c
index b87b127fdce4..ed37564ccbb3 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2356,7 +2356,7 @@ static struct file *open_detached_copy(struct path *path, bool recursive)
return file;
}
-SYSCALL_DEFINE3(open_tree, int, dfd, const char *, filename, unsigned, flags)
+SYSCALL_DEFINE3(open_tree, int, dfd, const char __user *, filename, unsigned, flags)
{
struct file *file;
struct path path;
@@ -3515,8 +3515,8 @@ SYSCALL_DEFINE3(fsmount, int, fs_fd, unsigned int, flags,
* Note the flags value is a combination of MOVE_MOUNT_* flags.
*/
SYSCALL_DEFINE5(move_mount,
- int, from_dfd, const char *, from_pathname,
- int, to_dfd, const char *, to_pathname,
+ int, from_dfd, const char __user *, from_pathname,
+ int, to_dfd, const char __user *, to_pathname,
unsigned int, flags)
{
struct path from_path, to_path;
--
2.23.0
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