diff options
| author | Gustavo A. R. Silva | 2018-12-21 22:41:17 +0100 |
|---|---|---|
| committer | David S. Miller | 2018-12-23 00:08:15 +0100 |
| commit | d686026b1e6ed4ea27d630d8f54f9a694db088b2 (patch) | |
| tree | d7bd2f44af64de4131d4dcfb161f6d6c9e18bcc1 /net/packet | |
| parent | net: core: Fix Spectre v1 vulnerability (diff) | |
| download | kernel-qcow2-linux-d686026b1e6ed4ea27d630d8f54f9a694db088b2.tar.gz kernel-qcow2-linux-d686026b1e6ed4ea27d630d8f54f9a694db088b2.tar.xz kernel-qcow2-linux-d686026b1e6ed4ea27d630d8f54f9a694db088b2.zip | |
phonet: af_phonet: Fix Spectre v1 vulnerability
protocol is 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:
net/phonet/af_phonet.c:48 phonet_proto_get() warn: potential spectre issue 'proto_tab' [w] (local cap)
Fix this by sanitizing protocol before using it to index proto_tab.
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
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet')
0 files changed, 0 insertions, 0 deletions