linux/block/bsg.c
Al Viro a861b9212a sg_write()/bsg_write() is not fit to be called under KERNEL_DS
[ Upstream commit 128394eff3 ]

Both damn things interpret userland pointers embedded into the payload;
worse, they are actually traversing those.  Leaving aside the bad
API design, this is very much _not_ safe to call with KERNEL_DS.
Bail out early if that happens.

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
2017-01-15 09:49:53 -05:00

1122 lines
24 KiB