USB: ene_usb6250: fix DMA to the stack

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commit 628c2893d4 upstream.

The ene_usb6250 sub-driver in usb-storage does USB I/O to buffers on
the stack, which doesn't work with vmapped stacks.  This patch fixes
the problem by allocating a separate 512-byte buffer at probe time and
using it for all of the offending I/O operations.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-and-tested-by: Andreas Hartmann <andihartmann@01019freenet.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Alan Stern 2017-05-16 11:47:29 -04:00 • committed by Greg Kroah-Hartman

parent 7d96e4a404

commit 6e2078c100

1 changed files with 55 additions and 35 deletions

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drivers/usb/storage/ene_ub6250.c

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