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| author | Al Viro <viro@ZenIV.linux.org.uk> | 2012-01-04 10:51:03 +0000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-04 15:03:06 -0800 |
| commit | d6042eac44b54dc5c7cb839175eb51dfd03d7633 (patch) | |
| tree | b2a1c5878771f4d7a5aada868bdbc7eafc4eba3b | |
| parent | 8a88951b5878dc475dcd841cefc767e36397d14e (diff) | |
| download | op-kernel-dev-d6042eac44b54dc5c7cb839175eb51dfd03d7633.zip op-kernel-dev-d6042eac44b54dc5c7cb839175eb51dfd03d7633.tar.gz | |
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 <viro@zeniv.linux.org.uk>
Acked-by: Josh Boyer <jwboyer@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/minix/inode.c | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/fs/minix/inode.c b/fs/minix/inode.c index 1d9e339..4d46a6a 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: |
