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authorAl Viro <viro@zeniv.linux.org.uk>2011-03-02 15:38:45 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2011-03-03 07:28:16 +0100
commit4787d45fa76b97e224a8299086bb5fb496275796 (patch)
tree8473ed7fd9d5bc00a8720340d226d7478f4163e6 /fs/sysv/namei.c
parentMerge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/air... (diff)
downloadlinux-4787d45fa76b97e224a8299086bb5fb496275796.tar.xz
linux-4787d45fa76b97e224a8299086bb5fb496275796.zip
sysv: i_nlink races in rename()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/sysv/namei.c')
-rw-r--r--fs/sysv/namei.c8
1 files changed, 2 insertions, 6 deletions
diff --git a/fs/sysv/namei.c b/fs/sysv/namei.c
index b427b1208c26..e474fbcf8bde 100644
--- a/fs/sysv/namei.c
+++ b/fs/sysv/namei.c
@@ -245,7 +245,6 @@ static int sysv_rename(struct inode * old_dir, struct dentry * old_dentry,
new_de = sysv_find_entry(new_dentry, &new_page);
if (!new_de)
goto out_dir;
- inode_inc_link_count(old_inode);
sysv_set_link(new_de, new_page, old_inode);
new_inode->i_ctime = CURRENT_TIME_SEC;
if (dir_de)
@@ -257,18 +256,15 @@ static int sysv_rename(struct inode * old_dir, struct dentry * old_dentry,
if (new_dir->i_nlink >= SYSV_SB(new_dir->i_sb)->s_link_max)
goto out_dir;
}
- inode_inc_link_count(old_inode);
err = sysv_add_link(new_dentry, old_inode);
- if (err) {
- inode_dec_link_count(old_inode);
+ if (err)
goto out_dir;
- }
if (dir_de)
inode_inc_link_count(new_dir);
}
sysv_delete_entry(old_de, old_page);
- inode_dec_link_count(old_inode);
+ mark_inode_dirty(old_inode);
if (dir_de) {
sysv_set_link(dir_de, dir_page, new_dir);