From: Ted Ts'o <tytso@mit.edu>
To: Eric Sandeen <sandeen@redhat.com>
Cc: linux-ext4@vger.kernel.org
Subject: Re: [PATCH 13/25] e2fsprogs: Fix some error cleanup path bugs
Date: Fri, 16 Sep 2011 18:55:55 -0400 [thread overview]
Message-ID: <20110916225555.GP16246@thunk.org> (raw)
In-Reply-To: <1316206180-6375-14-git-send-email-sandeen@redhat.com>
On Fri, Sep 16, 2011 at 03:49:28PM -0500, Eric Sandeen wrote:
> In inode_open(), if the allocation of &io fails, we go to cleanup
> and dereference io to test io->name, which is a bug.
>
> Similarly in undo_open() if allocation of &data fails, we
> go to cleanup and dereference data to test data->real.
>
> In the test_open() case we explicitly set retval to the only
> possible error return from ext2fs_get_mem(), so remove that
> for tidiness.
>
> The other changes just make make earlier returns go through
> the error goto for consistency.
>
> In many cases we returned directly from the first error, but
> "goto cleanup" etc for every subsequent error. In some
> cases this leads to "impossible" tests such as:
>
> if (ptr)
> ext2fs_free_mem(&ptr)
>
> on paths where ptr cannot be null because we would have
> returned directly earlier, and Coverity flags this.
>
> This isn't really indicative of an error in most cases, but
> I think it can be clearer to always exit through the error goto
> if it's used later in the function.
>
> Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Applied, thanks.
- Ted
next prev parent reply other threads:[~2011-09-16 22:55 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-16 20:49 [PATCH 00/25] e2fsprogs: Misc cleanups & fixes Eric Sandeen
2011-09-16 20:49 ` [PATCH 01/25] libext2: Fix EXT2_LIB_SOFTSUPP masking Eric Sandeen
2011-09-16 22:52 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 02/25] e2fsprogs: Remove impossible name_len tests Eric Sandeen
2011-09-16 22:30 ` Andreas Dilger
2011-09-16 22:52 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 03/25] fsck: fix -C option parsing Eric Sandeen
2011-09-16 22:52 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 04/25] mke2fs: remove impossible tests for null usage_types Eric Sandeen
2011-09-16 22:52 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 05/25] libext2: move buf variable completely under ifdef Eric Sandeen
2011-09-16 22:53 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 06/25] libext2fs: Potential null ptr deref in undo_err_handler_init Eric Sandeen
2011-09-16 22:53 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 07/25] e2fsck: handle null fs in print_pathname() Eric Sandeen
2011-09-16 22:53 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 08/25] e2fsprogs: annotate intentional fallthroughs in case statements Eric Sandeen
2011-09-16 22:53 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 09/25] uuidd: Add missing break to option case statement Eric Sandeen
2011-09-16 22:54 ` Ted Ts'o
2011-09-17 0:47 ` Eric Sandeen
2011-09-16 20:49 ` [PATCH 10/25] freefrag: fix up getopt " Eric Sandeen
2011-09-16 22:54 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 11/25] libe2p: reach unreachable code Eric Sandeen
2011-09-16 22:54 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 12/25] e2fsck: Don't store old_op from ehandler_operation if we don't restore it Eric Sandeen
2011-09-16 22:55 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 13/25] e2fsprogs: Fix some error cleanup path bugs Eric Sandeen
2011-09-16 22:55 ` Ted Ts'o [this message]
2011-09-16 20:49 ` [PATCH 14/25] subst: Fix free of uninit pointers Eric Sandeen
2011-09-16 22:56 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 15/25] filefrag: Fix uninitialized "expected" value Eric Sandeen
2011-09-16 22:56 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 16/25] e2fsck: remove extraneous memset Eric Sandeen
2011-09-16 22:56 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 17/25] mke2fs: Do not let -t or -T be specified more than once Eric Sandeen
2011-09-16 22:57 ` Ted Ts'o
2011-09-16 22:57 ` Ted Ts'o
2011-09-17 0:49 ` Eric Sandeen
2011-09-16 20:49 ` [PATCH 18/25] e2initrd_helper: Fix memory leak on error Eric Sandeen
2011-09-16 22:58 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 19/25] libext2: Fix leaks in write_bitmaps on error returns Eric Sandeen
2011-09-16 22:58 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 20/25] test_icount: fclose() before exit Eric Sandeen
2011-09-16 22:58 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 21/25] e2fsck: Fix leaks in error paths Eric Sandeen
2011-09-16 23:41 ` Ted Ts'o
2011-09-17 0:57 ` Eric Sandeen
2011-09-16 20:49 ` [PATCH 22/25] tune2fs: handle inode and/or block bitmap read failures in resize_inode() Eric Sandeen
2011-09-16 23:57 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 23/25] e2fsprogs: Don't try to close an fd which is negative Eric Sandeen
2011-09-16 23:57 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 24/25] e4defrag: Check error return of sysconf() Eric Sandeen
2011-09-16 23:57 ` Ted Ts'o
2011-09-16 20:49 ` [PATCH 25/25] mke2fs: free tdb_dir string if it came from the profile Eric Sandeen
2011-09-16 23:58 ` Ted Ts'o
2011-09-16 21:27 ` [PATCH 00/25] e2fsprogs: Misc cleanups & fixes Eric Sandeen
2011-09-16 22:05 ` Ted Ts'o
2011-09-16 22:27 ` Eric Sandeen
2011-09-16 23:49 ` Ted Ts'o
2011-09-17 0:58 ` Eric Sandeen
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