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From: Jonathan Nieder <jrnieder@gmail.com>
To: "brian m. carlson" <sandals@crustytoothpaste.net>
Cc: git@vger.kernel.org, Jeff King <peff@peff.net>,
	Michael Haggerty <mhagger@alum.mit.edu>,
	Brandon Williams <bmwill@google.com>,
	Stefan Beller <sbeller@google.com>
Subject: Re: [PATCH v2 01/24] walker: convert to struct object_id
Date: Mon, 9 Oct 2017 15:37:09 -0700
Message-ID: <20171009223709.GE19555@aiede.mtv.corp.google.com> (raw)
In-Reply-To: <20171009011132.675341-2-sandals@crustytoothpaste.net>

Hi,

brian m. carlson wrote:

> Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
> ---
>  walker.c | 24 ++++++++++++------------
>  1 file changed, 12 insertions(+), 12 deletions(-)

An egrep for 'sha1|unsigned char' finds nothing left in the file after
this change.

[...]
> --- a/walker.c
> +++ b/walker.c
> @@ -7,7 +7,7 @@
>  #include "blob.h"
>  #include "refs.h"
>  
> -static unsigned char current_commit_sha1[20];
> +static struct object_id current_commit_oid;

Yay!

nit, not suggesting changing anything: I would have been tempted to
call this current_commit_id, or even just current_commmit.

[...]
> @@ -259,7 +259,7 @@ int walker_fetch(struct walker *walker, int targets, char **target,
>  	struct strbuf refname = STRBUF_INIT;
>  	struct strbuf err = STRBUF_INIT;
>  	struct ref_transaction *transaction = NULL;
> -	unsigned char *sha1 = xmalloc(targets * 20);
> +	struct object_id *oids = xmalloc(targets * sizeof(struct object_id));

Not new in this patch, just noticing while we're here: can this
multiplication overflow?

E.g. in remote-curl, it looks like nr_heads gets incremented once per
"fetch" line passed to the remote helper, making it unbounded.

This could use st_mult or ALLOC_ARRAY to protect against that.  The
caller remote-curl.c::parse_fetch also needs an overflow check to
avoid overflowing its "int".  Likewise, walker_targets_stdin needs an
overflow check to avoid overflowing its "int".

[...]
> @@ -321,7 +321,7 @@ int walker_fetch(struct walker *walker, int targets, char **target,
>  done:
>  	ref_transaction_free(transaction);
>  	free(msg);
> -	free(sha1);
> +	free(oids);

Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>

  reply index

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-09  1:11 [PATCH v2 00/24] object_id part 10 brian m. carlson
2017-10-09  1:11 ` [PATCH v2 01/24] walker: convert to struct object_id brian m. carlson
2017-10-09 22:37   ` Jonathan Nieder [this message]
2017-10-09  1:11 ` [PATCH v2 02/24] refs/files-backend: convert struct ref_to_prune to object_id brian m. carlson
2017-10-09 22:38   ` Jonathan Nieder
2017-10-09  1:11 ` [PATCH v2 03/24] refs: convert delete_ref and refs_delete_ref to struct object_id brian m. carlson
2017-10-09 22:43   ` Jonathan Nieder
2017-10-09  1:11 ` [PATCH v2 04/24] refs: convert update_ref and refs_update_ref to use " brian m. carlson
2017-10-09 22:57   ` Jonathan Nieder
2017-10-11  6:33   ` Michael Haggerty
2017-10-12  8:42     ` brian m. carlson
2017-10-09  1:11 ` [PATCH v2 05/24] refs: update ref transactions " brian m. carlson
2017-10-09 23:13   ` Jonathan Nieder
2017-10-11  6:58   ` Michael Haggerty
2017-10-09  1:11 ` [PATCH v2 06/24] Convert check_connected " brian m. carlson
2017-10-09 23:20   ` Jonathan Nieder
2017-10-09  1:11 ` [PATCH v2 07/24] refs: convert resolve_refdup and refs_resolve_refdup to " brian m. carlson
2017-10-09 23:36   ` Jonathan Nieder
2017-10-10  1:16   ` Junio C Hamano
2017-10-09  1:11 ` [PATCH v2 08/24] refs: convert read_ref and read_ref_full to object_id brian m. carlson
2017-10-10  1:35   ` Jonathan Nieder
2017-10-09  1:11 ` [PATCH v2 09/24] refs: convert dwim_ref and expand_ref to struct object_id brian m. carlson
2017-10-10  2:03   ` Jonathan Nieder
2017-10-09  1:11 ` [PATCH v2 10/24] builtin/reflog: convert remaining unsigned char uses to object_id brian m. carlson
2017-10-10  2:15   ` Jonathan Nieder
2017-10-09  1:11 ` [PATCH v2 11/24] refs: convert dwim_log to struct object_id brian m. carlson
2017-10-10  2:18   ` Jonathan Nieder
2017-10-09  1:11 ` [PATCH v2 12/24] pack-bitmap: convert traverse_bitmap_commit_list to object_id brian m. carlson
2017-10-10  2:19   ` Jonathan Nieder
2017-10-09  1:11 ` [PATCH v2 13/24] builtin/pack-objects: convert to struct object_id brian m. carlson
2017-10-10  2:24   ` Jonathan Nieder
2017-10-09  1:11 ` [PATCH v2 14/24] refs: convert peel_ref " brian m. carlson
2017-10-11  8:00   ` Michael Haggerty
2017-10-09  1:11 ` [PATCH v2 15/24] refs: convert read_ref_at " brian m. carlson
2017-10-09  1:11 ` [PATCH v2 16/24] refs: convert reflog_expire parameter " brian m. carlson
2017-10-09  1:11 ` [PATCH v2 17/24] sha1_file: convert index_path and index_fd " brian m. carlson
2017-10-09  1:11 ` [PATCH v2 18/24] Convert remaining callers of resolve_gitlink_ref to object_id brian m. carlson
2017-10-09  1:11 ` [PATCH v2 19/24] refs: convert resolve_gitlink_ref to struct object_id brian m. carlson
2017-10-09  1:11 ` [PATCH v2 20/24] worktree: convert struct worktree to object_id brian m. carlson
2017-10-09  1:11 ` [PATCH v2 21/24] refs: convert resolve_ref_unsafe to struct object_id brian m. carlson
2017-10-11  8:23   ` Michael Haggerty
2017-10-09  1:11 ` [PATCH v2 22/24] refs: convert peel_object " brian m. carlson
2017-10-09  1:11 ` [PATCH v2 23/24] refs: convert read_raw_ref backends " brian m. carlson
2017-10-11  8:30   ` Michael Haggerty
2017-10-09  1:11 ` [PATCH v2 24/24] refs/files-backend: convert static functions to object_id brian m. carlson
2017-10-11  8:36   ` Michael Haggerty
2017-10-09 18:00 ` [PATCH v2 00/24] object_id part 10 Stefan Beller
2017-10-09 22:44 ` Junio C Hamano
2017-10-11 10:05 ` Michael Haggerty
2017-10-11 10:42   ` Junio C Hamano
2017-10-12  8:46   ` brian m. carlson
2017-10-12  9:58     ` Junio C Hamano
2017-10-12 10:22       ` brian m. carlson

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