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  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Thu, 19 Jul 2007 17:34:31 +0800
From:	Denis Cheng <>
To:	Paul Clements <>
	Pavel Machek <>,
	Steven Whitehouse <>,
	Andrew Morton <>,
	Denis Cheng <>
Subject: [PATCH 2/2] nbd: change a parameter's type to remove a memcpy call

this memcpy looks so strange, in fact it's merely a pointer dereference,
so I change the parameter's type to refer it more directly,
this could make the memcpy not needed anymore.

in the function nbd_read_stat where nbd_find_request is only once called,
the parameter served should be transformed accordingly.

Signed-off-by: Denis Cheng <>
 drivers/block/nbd.c |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 86639c0..a4d8508 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -235,14 +235,11 @@ error_out:
 	return 1;
-static struct request *nbd_find_request(struct nbd_device *lo, char *handle)
+static struct request *nbd_find_request(struct nbd_device *lo, struct request *xreq)
 	struct request *req, *n;
-	struct request *xreq;
 	int err;
-	memcpy(&xreq, handle, sizeof(xreq));
 	err = wait_event_interruptible(lo->active_wq, lo->active_req != xreq);
 	if (unlikely(err))
 		goto out;
@@ -297,7 +294,7 @@ static struct request *nbd_read_stat(struct nbd_device *lo)
 		goto harderror;
-	req = nbd_find_request(lo, reply.handle);
+	req = nbd_find_request(lo, *(struct request **)reply.handle);
 	if (unlikely(IS_ERR(req))) {
 		result = PTR_ERR(req);
 		if (result != -ENOENT)

To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists