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| author |   Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-04-15 15:57:23 -0500 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-04-16 21:01:45 -0700 |
| commit | 899537b73557aafbdd11050b501cf54b4f5c45af (patch) | |
| tree | fb231860e44e0e39982d5bf475c569b79bce1003 /net/core | |
| parent | net/core: work around section mismatch warning for ptp_classifier (diff) | |
| download | linux-dev-899537b73557aafbdd11050b501cf54b4f5c45af.tar.xz linux-dev-899537b73557aafbdd11050b501cf54b4f5c45af.zip | |
net: atm: Fix potential Spectre v1 vulnerabilities
arg is 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/atm/lec.c:715 lec_mcast_attach() warn: potential spectre issue 'dev_lec' [r] (local cap)
Fix this by sanitizing arg before using it to index dev_lec.
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://lore.kernel.org/lkml/20180423164740.GY17484@dhcp22.suse.cz/
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
0 files changed, 0 insertions, 0 deletions