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| author | Al Viro <viro@zeniv.linux.org.uk> | 2009-05-08 16:05:57 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2009-05-09 10:51:34 -0400 |
| commit | 2a32cebd6cbcc43996c3e2d114fa32ba1e71192a (patch) | |
| tree | 0ad94849a7bc3e97cd19978005d1898c8bb44b36 /include | |
| parent | f9dbd05bc97d1d4f17c2057612f6a8e4dbd039e0 (diff) | |
| download | linux-3.10-2a32cebd6cbcc43996c3e2d114fa32ba1e71192a.tar.gz linux-3.10-2a32cebd6cbcc43996c3e2d114fa32ba1e71192a.tar.bz2 linux-3.10-2a32cebd6cbcc43996c3e2d114fa32ba1e71192a.zip | |
Fix races around the access to ->s_options
Put generic_show_options read access to s_options under rcu_read_lock,
split save_mount_options() into "we are setting it the first time"
(uses in foo_fill_super()) and "we are relacing and freeing the old one",
synchronize_rcu() before kfree() in the latter.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index ed788426f46..3b534e527e0 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2368,6 +2368,7 @@ extern void file_update_time(struct file *file); extern int generic_show_options(struct seq_file *m, struct vfsmount *mnt); extern void save_mount_options(struct super_block *sb, char *options); +extern void replace_mount_options(struct super_block *sb, char *options); static inline ino_t parent_ino(struct dentry *dentry) { |