The patch titled
r/o bind mounts: Accept passing a mnt NULL pointer to mnt_drop_write()
has been added to the -mm tree. Its filename is
r-o-bind-mounts-track-number-of-mount-writers-fix.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: r/o bind mounts: Accept passing a mnt NULL pointer to mnt_drop_write()
From: Jan Blunck <jblunck@xxxxxxx>
In case of somebody opens a file with dentry_open(dentry, NULL, ...) we
don't want to stumble on the NULL pointer mnt in struct file.
Signed-off-by: Jan Blunck <jblunck@xxxxxxx>
Cc: Dave Hansen <haveblue@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/namespace.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN fs/namespace.c~r-o-bind-mounts-track-number-of-mount-writers-fix fs/namespace.c
--- a/fs/namespace.c~r-o-bind-mounts-track-number-of-mount-writers-fix
+++ a/fs/namespace.c
@@ -249,6 +249,9 @@ void mnt_drop_write(struct vfsmount *mnt
int must_check_underflow = 0;
struct mnt_writer *cpu_writer;
+ if (!mnt)
+ return;
+
cpu_writer = &get_cpu_var(mnt_writers);
spin_lock(&cpu_writer->lock);
_
Patches currently in -mm which might be from jblunck@xxxxxxx are
r-o-bind-mounts-unix_find_other-elevate-write-count-for-touch_atime-fix.patch
r-o-bind-mounts-track-number-of-mount-writers-fix.patch
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