[PATCH] tomoyo: Change pathname calculation for read-only filesystems.

[James Morris]

On Fri, 12 Apr 2019, Tetsuo Handa wrote:

> >> Signed-off-by: Tetsuo Handa <penguin-kernel at I-love.SAKURA.ne.jp>
> >> ---
> >>  security/tomoyo/realpath.c | 3 ++-
> >>  1 file changed, 2 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c
> >> index 85e6e31..e7832448 100644
> >> --- a/security/tomoyo/realpath.c
> >> +++ b/security/tomoyo/realpath.c
> >> @@ -295,7 +295,8 @@ char *tomoyo_realpath_from_path(const struct path *path)
> >>  		 * or dentry without vfsmount.
> >>  		 */
> >>  		if (!path->mnt ||
> >> -		    (!inode->i_op->rename))
> >> +		    (!inode->i_op->rename &&
> >> +		     !(sb->s_type->fs_flags & FS_REQUIRES_DEV)))
> >>  			pos = tomoyo_get_local_path(path->dentry, buf,
> >>  						    buf_len - 1);
> >>  		/* Get absolute name for the rest. */

Applied to
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git next-tomoyo

-- 
James Morris
<jmorris at namei.org>