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| author | James Bottomley <James.Bottomley@SteelEye.com> | 2005-08-26 18:34:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-08-26 19:37:13 -0700 |
| commit | 36676bcbf9f6bcbea9d06e67ee8d04eacde54952 (patch) | |
| tree | f31e9a79a643cfba649637164a559d94b4183ccc /fs/sysfs | |
| parent | 657390d25d4241705cb4fc5b3b4ba5b30575dc17 (diff) | |
| download | linux-36676bcbf9f6bcbea9d06e67ee8d04eacde54952.tar.gz | |
[PATCH] Fix oops in sysfs_hash_and_remove_file()
The problem arises if an entity in sysfs is created and removed without ever having been made completely visible. In SCSI this is triggered by removing a device while it's initialising. The problem appears to be that because it was never made visible in sysfs, the sysfs dentry has a null d_inode which oopses when a reference is made to it. The solution is simply to check d_inode and assume the object was never made visible (and thus doesn't need deleting) if it's NULL. (akpm: possibly a stopgap for 2.6.13 scsi problems. May not be the long-term fix) Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/sysfs')
| -rw-r--r-- | fs/sysfs/inode.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index d727dc960634..970a33f03299 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -228,6 +228,10 @@ void sysfs_hash_and_remove(struct dentry * dir, const char * name) struct sysfs_dirent * sd; struct sysfs_dirent * parent_sd = dir->d_fsdata; + if (dir->d_inode == NULL) + /* no inode means this hasn't been made visible yet */ + return; + down(&dir->d_inode->i_sem); list_for_each_entry(sd, &parent_sd->s_children, s_sibling) { if (!sd->s_element) |