| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20131018183700.GC19188@birch.djwong.org>
Date: Fri, 18 Oct 2013 11:37:00 -0700
From: "Darrick J. Wong" <darrick.wong@...cle.com>
To: tytso@....edu
Cc: linux-ext4@...r.kernel.org
Subject: Re: [PATCH 09/25] e2fsck: teach EA refcounting code to handle 64bit
block addresses
On Thu, Oct 17, 2013 at 09:49:55PM -0700, Darrick J. Wong wrote:
> The extended attribute refcounting code only accepts blk_t, which is
> dangerous because EA blocks can exist at high addresses (> 2^32) as
> well. Therefore, widen the block fields to 64 bits.
>
> Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
> ---
> e2fsck/e2fsck.h | 12 ++++++------
> e2fsck/ea_refcount.c | 36 ++++++++++++++++++------------------
> 2 files changed, 24 insertions(+), 24 deletions(-)
>
>
> diff --git a/e2fsck/e2fsck.h b/e2fsck/e2fsck.h
> index 13d70f1..f1df525 100644
> --- a/e2fsck/e2fsck.h
> +++ b/e2fsck/e2fsck.h
> @@ -432,17 +432,17 @@ extern struct dx_dir_info *e2fsck_dx_dir_info_iter(e2fsck_t ctx, int *control);
> /* ea_refcount.c */
> extern errcode_t ea_refcount_create(int size, ext2_refcount_t *ret);
> extern void ea_refcount_free(ext2_refcount_t refcount);
> -extern errcode_t ea_refcount_fetch(ext2_refcount_t refcount, blk_t blk,
> +extern errcode_t ea_refcount_fetch(ext2_refcount_t refcount, blk64_t blk,
> int *ret);
> extern errcode_t ea_refcount_increment(ext2_refcount_t refcount,
> - blk_t blk, int *ret);
> + blk64_t blk, int *ret);
> extern errcode_t ea_refcount_decrement(ext2_refcount_t refcount,
> - blk_t blk, int *ret);
> + blk64_t blk, int *ret);
> extern errcode_t ea_refcount_store(ext2_refcount_t refcount,
> - blk_t blk, int count);
> -extern blk_t ext2fs_get_refcount_size(ext2_refcount_t refcount);
> + blk64_t blk, int count);
> +extern blk64_t ext2fs_get_refcount_size(ext2_refcount_t refcount);
> extern void ea_refcount_intr_begin(ext2_refcount_t refcount);
> -extern blk_t ea_refcount_intr_next(ext2_refcount_t refcount, int *ret);
> +extern blk64_t ea_refcount_intr_next(ext2_refcount_t refcount, int *ret);
>
> /* ehandler.c */
> extern const char *ehandler_operation(const char *op);
> diff --git a/e2fsck/ea_refcount.c b/e2fsck/ea_refcount.c
> index e66e636..6f376a3 100644
> --- a/e2fsck/ea_refcount.c
> +++ b/e2fsck/ea_refcount.c
> @@ -25,14 +25,14 @@
> * checked, its bit is set in the block_ea_map bitmap.
> */
> struct ea_refcount_el {
> - blk_t ea_blk;
> + blk64_t ea_blk;
> int ea_count;
> };
>
> struct ea_refcount {
> - blk_t count;
> - blk_t size;
> - blk_t cursor;
> + unsigned long count;
> + unsigned long size;
> + unsigned long cursor;
This (unsigned long instead of blk_t) is the only thing that changed since last
time.
--D
> struct ea_refcount_el *list;
> };
>
> @@ -111,11 +111,11 @@ static void refcount_collapse(ext2_refcount_t refcount)
> * specified position.
> */
> static struct ea_refcount_el *insert_refcount_el(ext2_refcount_t refcount,
> - blk_t blk, int pos)
> + blk64_t blk, int pos)
> {
> struct ea_refcount_el *el;
> errcode_t retval;
> - blk_t new_size = 0;
> + blk64_t new_size = 0;
> int num;
>
> if (refcount->count >= refcount->size) {
> @@ -153,7 +153,7 @@ static struct ea_refcount_el *insert_refcount_el(ext2_refcount_t refcount,
> * and we can't find an entry, create one in the sorted list.
> */
> static struct ea_refcount_el *get_refcount_el(ext2_refcount_t refcount,
> - blk_t blk, int create)
> + blk64_t blk, int create)
> {
> int low, high, mid;
>
> @@ -206,7 +206,7 @@ retry:
> return 0;
> }
>
> -errcode_t ea_refcount_fetch(ext2_refcount_t refcount, blk_t blk,
> +errcode_t ea_refcount_fetch(ext2_refcount_t refcount, blk64_t blk,
> int *ret)
> {
> struct ea_refcount_el *el;
> @@ -220,7 +220,7 @@ errcode_t ea_refcount_fetch(ext2_refcount_t refcount, blk_t blk,
> return 0;
> }
>
> -errcode_t ea_refcount_increment(ext2_refcount_t refcount, blk_t blk, int *ret)
> +errcode_t ea_refcount_increment(ext2_refcount_t refcount, blk64_t blk, int *ret)
> {
> struct ea_refcount_el *el;
>
> @@ -234,7 +234,7 @@ errcode_t ea_refcount_increment(ext2_refcount_t refcount, blk_t blk, int *ret)
> return 0;
> }
>
> -errcode_t ea_refcount_decrement(ext2_refcount_t refcount, blk_t blk, int *ret)
> +errcode_t ea_refcount_decrement(ext2_refcount_t refcount, blk64_t blk, int *ret)
> {
> struct ea_refcount_el *el;
>
> @@ -249,7 +249,7 @@ errcode_t ea_refcount_decrement(ext2_refcount_t refcount, blk_t blk, int *ret)
> return 0;
> }
>
> -errcode_t ea_refcount_store(ext2_refcount_t refcount, blk_t blk, int count)
> +errcode_t ea_refcount_store(ext2_refcount_t refcount, blk64_t blk, int count)
> {
> struct ea_refcount_el *el;
>
> @@ -263,7 +263,7 @@ errcode_t ea_refcount_store(ext2_refcount_t refcount, blk_t blk, int count)
> return 0;
> }
>
> -blk_t ext2fs_get_refcount_size(ext2_refcount_t refcount)
> +blk64_t ext2fs_get_refcount_size(ext2_refcount_t refcount)
> {
> if (!refcount)
> return 0;
> @@ -277,7 +277,7 @@ void ea_refcount_intr_begin(ext2_refcount_t refcount)
> }
>
>
> -blk_t ea_refcount_intr_next(ext2_refcount_t refcount,
> +blk64_t ea_refcount_intr_next(ext2_refcount_t refcount,
> int *ret)
> {
> struct ea_refcount_el *list;
> @@ -370,7 +370,7 @@ int main(int argc, char **argv)
> int i = 0;
> ext2_refcount_t refcount;
> int size, arg;
> - blk_t blk;
> + blk64_t blk;
> errcode_t retval;
>
> while (1) {
> @@ -394,7 +394,7 @@ int main(int argc, char **argv)
> printf("Freeing refcount\n");
> break;
> case BCODE_STORE:
> - blk = (blk_t) bcode_program[i++];
> + blk = (blk64_t) bcode_program[i++];
> arg = bcode_program[i++];
> printf("Storing blk %u with value %d\n", blk, arg);
> retval = ea_refcount_store(refcount, blk, arg);
> @@ -403,7 +403,7 @@ int main(int argc, char **argv)
> "while storing blk %u", blk);
> break;
> case BCODE_FETCH:
> - blk = (blk_t) bcode_program[i++];
> + blk = (blk64_t) bcode_program[i++];
> retval = ea_refcount_fetch(refcount, blk, &arg);
> if (retval)
> com_err("ea_refcount_fetch", retval,
> @@ -413,7 +413,7 @@ int main(int argc, char **argv)
> blk, arg);
> break;
> case BCODE_INCR:
> - blk = (blk_t) bcode_program[i++];
> + blk = (blk64_t) bcode_program[i++];
> retval = ea_refcount_increment(refcount, blk, &arg);
> if (retval)
> com_err("ea_refcount_increment", retval,
> @@ -423,7 +423,7 @@ int main(int argc, char **argv)
> blk, arg);
> break;
> case BCODE_DECR:
> - blk = (blk_t) bcode_program[i++];
> + blk = (blk64_t) bcode_program[i++];
> retval = ea_refcount_decrement(refcount, blk, &arg);
> if (retval)
> com_err("ea_refcount_decrement", retval,
>
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists