Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e49452c67703d3647467d65275fb893589384fed Commit: e49452c67703d3647467d65275fb893589384fed Parent: cbd9c883696da72b2b1f03f909dbacc04bbf8b58 Author: Tejun Heo <[EMAIL PROTECTED]> AuthorDate: Wed Jan 16 12:06:14 2008 +0900 Committer: Linus Torvalds <[EMAIL PROTECTED]> CommitDate: Wed Jan 16 09:54:03 2008 -0800
sysfs: make sysfs_lookup() return ERR_PTR(-ENOENT) on failed lookup sysfs tries to keep dcache a strict subset of sysfs_dirent tree by shooting down dentries when a node is removed, that is, no negative dentry for sysfs. However, the lookup function returned NULL and thus created negative dentries when the target node didn't exist. Make sysfs_lookup() return ERR_PTR(-ENOENT) on lookup failure. This fixes the NULL dereference bug in sysfs_get_dentry() discovered by bluetooth rfcomm device moving around. Signed-off-by: Tejun Heo <[EMAIL PROTECTED]> Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]> --- fs/sysfs/dir.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index 3371629..b197016 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -678,8 +678,10 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry, sd = sysfs_find_dirent(parent_sd, dentry->d_name.name); /* no such entry */ - if (!sd) + if (!sd) { + ret = ERR_PTR(-ENOENT); goto out_unlock; + } /* attach dentry and inode */ inode = sysfs_get_inode(sd); - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html