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block: Clear kernel memory before copying to user
authorKeith Busch <keith.busch@intel.com>
Wed, 7 Nov 2018 14:37:45 +0000 (07:37 -0700)
committerJens Axboe <axboe@kernel.dk>
Wed, 7 Nov 2018 22:41:31 +0000 (15:41 -0700)
commitf3587d76da05f68098ddb1cb3c98cc6a9e8a402c
tree8b63b149df907b539e68069d20bcfcfd1480a06dtree | snapshot
parente31d36b0a453d581fb077fce6883811c5e14874dcommit | diff
block: Clear kernel memory before copying to user

If the kernel allocates a bounce buffer for user read data, this memory
needs to be cleared before copying it to the user, otherwise it may leak
kernel memory to user space.

Laurence Oberman <loberman@redhat.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/bio.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)