linux/drivers/infiniband
Gustavo A. R. Silva 0295e39595 IB/ucm: Fix Spectre v1 vulnerability
hdr.cmd can be indirectly controlled by user-space, hence leading to
a potential exploitation of the Spectre variant 1 vulnerability.

This issue was detected with the help of Smatch:

drivers/infiniband/core/ucm.c:1127 ib_ucm_write() warn: potential
spectre issue 'ucm_cmd_table' [r] (local cap)

Fix this by sanitizing hdr.cmd before using it to index
ucm_cmd_table.

Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].

[1] https://marc.info/?l=linux-kernel&m=152449131114778&w=2

Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-10-16 11:32:40 -04:00
..
core IB/ucm: Fix Spectre v1 vulnerability 2018-10-16 11:32:40 -04:00
hw IB/mlx5: Unmap DMA addr from HCA before IOMMU 2018-10-10 14:52:43 -04:00
sw Linux 4.18 2018-08-16 13:12:00 -06:00
ulp IB/srp: Avoid that sg_reset -d ${srp_device} triggers an infinite loop 2018-09-19 15:28:24 -06:00
Kconfig IB/ucm: fix UCM link error 2018-08-21 16:56:32 -06:00
Makefile IB/rdmavt: Create module framework and handle driver registration 2016-03-10 20:37:04 -05:00