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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2007-06-14 03:45:18 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-07-11 16:09:07 -0700 |
| commit | 9d9307dabb3de8140fb3801bf6eb01f231dbd83d (patch) | |
| tree | 55cecd0eaefe5e3cc89f2aaf8542607f7d43ae8e | |
| parent | 0c73f18b7d95de8a007039337063a770b5fc8e7a (diff) | |
| download | linux-9d9307dabb3de8140fb3801bf6eb01f231dbd83d.tar.gz linux-9d9307dabb3de8140fb3801bf6eb01f231dbd83d.tar.bz2 linux-9d9307dabb3de8140fb3801bf6eb01f231dbd83d.zip | |
sysfs: Fix oops in sysfs_drop_dentry on x86_64
Fix oops on x86_64 caused by the dereference of dir in
sysfs_drop_dentry() made before checking if dir is not NULL
(cf. http://marc.info/?l=linux-kernel&m=118151626704924&w=2).
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | fs/sysfs/inode.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index 732fd7f371e0..ee31bf369a88 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -285,7 +285,7 @@ void sysfs_drop_dentry(struct sysfs_dirent *sd) int sysfs_hash_and_remove(struct dentry * dir, const char * name) { struct sysfs_dirent **pos, *sd; - struct sysfs_dirent *parent_sd = dir->d_fsdata; + struct sysfs_dirent *parent_sd; int found = 0; if (!dir) @@ -295,6 +295,7 @@ int sysfs_hash_and_remove(struct dentry * dir, const char * name) /* no inode means this hasn't been made visible yet */ return -ENOENT; + parent_sd = dir->d_fsdata; mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT); for (pos = &parent_sd->s_children; *pos; pos = &(*pos)->s_sibling) { sd = *pos; |