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:	Tue, 14 Oct 2014 20:08:34 +0200
From:	Bjørn Mork <>
To:	Joe Perches <>
Cc:	Fabian Frederick <>,,
	"John W. Linville" <>,,
Subject: Re: [PATCH 1/1 linux-next] zd1201: replace kmalloc/memset by kzalloc

Joe Perches <> writes:

> And does this really need to be alloc'd?

Yes, it does. It is used as a transfer_buffer in usb_fill_bulk_urb() and
must be "suitable for DMA".  From include/linux/usb.h:

 * struct urb - USB Request Block
 * @transfer_buffer:  This identifies the buffer to (or from) which the I/O
 *      request will be performed unless URB_NO_TRANSFER_DMA_MAP is set
 *      (however, do not leave garbage in transfer_buffer even then).
 *      This buffer must be suitable for DMA; allocate it with
 *      kmalloc() or equivalent.  For transfers to "in" endpoints, contents
 *      of this buffer will be modified.  This buffer is used for the data
 *      stage of control transfers.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists