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authorAl Viro <viro@zeniv.linux.org.uk>2016-12-16 21:42:06 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2016-12-23 07:03:42 +0300
commit128394eff343fc6d2f32172f03e24829539c5835 (patch)
tree025d426075681b9904895045929e322429b8a251 /fs
parentf698cccbc89e33cda4795a375e47daaa3689485e (diff)
downloadlinux-128394eff343fc6d2f32172f03e24829539c5835.tar.xz
sg_write()/bsg_write() is not fit to be called under KERNEL_DS
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>
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