From: Al Viro Date: Wed, 4 Jan 2012 10:51:03 +0000 (+0000) Subject: minixfs: misplaced checks lead to dentry leak X-Git-Tag: v3.2~2 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=d6042eac44b54dc5c7cb839175eb51dfd03d7633 minixfs: misplaced checks lead to dentry leak bitmap size sanity checks should be done *before* allocating ->s_root; there their cleanup on failure would be correct. As it is, we do iput() on root inode, but leak the root dentry... Signed-off-by: Al Viro Acked-by: Josh Boyer Signed-off-by: Linus Torvalds --- diff --git a/fs/minix/inode.c b/fs/minix/inode.c index 1d9e33966db0..4d46a6a59070 100644 --- a/fs/minix/inode.c +++ b/fs/minix/inode.c @@ -263,23 +263,6 @@ static int minix_fill_super(struct super_block *s, void *data, int silent) goto out_no_root; } - ret = -ENOMEM; - s->s_root = d_alloc_root(root_inode); - if (!s->s_root) - goto out_iput; - - if (!(s->s_flags & MS_RDONLY)) { - if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ - ms->s_state &= ~MINIX_VALID_FS; - mark_buffer_dirty(bh); - } - if (!(sbi->s_mount_state & MINIX_VALID_FS)) - printk("MINIX-fs: mounting unchecked file system, " - "running fsck is recommended\n"); - else if (sbi->s_mount_state & MINIX_ERROR_FS) - printk("MINIX-fs: mounting file system with errors, " - "running fsck is recommended\n"); - /* Apparently minix can create filesystems that allocate more blocks for * the bitmaps than needed. We simply ignore that, but verify it didn't * create one with not enough blocks and bail out if so. @@ -300,6 +283,23 @@ static int minix_fill_super(struct super_block *s, void *data, int silent) goto out_iput; } + ret = -ENOMEM; + s->s_root = d_alloc_root(root_inode); + if (!s->s_root) + goto out_iput; + + if (!(s->s_flags & MS_RDONLY)) { + if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ + ms->s_state &= ~MINIX_VALID_FS; + mark_buffer_dirty(bh); + } + if (!(sbi->s_mount_state & MINIX_VALID_FS)) + printk("MINIX-fs: mounting unchecked file system, " + "running fsck is recommended\n"); + else if (sbi->s_mount_state & MINIX_ERROR_FS) + printk("MINIX-fs: mounting file system with errors, " + "running fsck is recommended\n"); + return 0; out_iput: