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| author | Eric W. Biederman | 2017-01-04 05:37:27 +0100 |
|---|---|---|
| committer | Eric W. Biederman | 2017-01-10 01:34:55 +0100 |
| commit | 75422726b0f717d67db3283c2eb5bc14fa2619c5 (patch) | |
| tree | 166111b615cc1e00e809eff6186146e09785c524 /net/8021q | |
| parent | mnt: Protect the mountpoint hashtable with mount_lock (diff) | |
| download | kernel-qcow2-linux-75422726b0f717d67db3283c2eb5bc14fa2619c5.tar.gz kernel-qcow2-linux-75422726b0f717d67db3283c2eb5bc14fa2619c5.tar.xz kernel-qcow2-linux-75422726b0f717d67db3283c2eb5bc14fa2619c5.zip | |
libfs: Modify mount_pseudo_xattr to be clear it is not a userspace mount
Add MS_KERNMOUNT to the flags that are passed.
Use sget_userns and force &init_user_ns instead of calling sget so that
even if called from a weird context the internal filesystem will be
considered to be in the intial user namespace.
Luis Ressel reported that the the failure to pass MS_KERNMOUNT into
mount_pseudo broke his in development graphics driver that uses the
generic drm infrastructure. I am not certain the deriver was bug
free in it's usage of that infrastructure but since
mount_pseudo_xattr can never be triggered by userspace it is clearer
and less error prone, and less problematic for the code to be explicit.
Reported-by: Luis Ressel <aranea@aixah.de>
Tested-by: Luis Ressel <aranea@aixah.de>
Acked-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'net/8021q')
0 files changed, 0 insertions, 0 deletions