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author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2018-06-29 21:28:07 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-22 15:25:52 +0300 |
commit | af4bae09386c787fbc2fa9b69a50d65eba4b6e30 (patch) | |
tree | 6af40244d3cbf61b1c812565eefc936d7dbbeb0d /net/dccp | |
parent | 517340a7ef476a44905fdb001c4a3dd824d99c3b (diff) | |
download | linux-af4bae09386c787fbc2fa9b69a50d65eba4b6e30.tar.xz |
atm: zatm: Fix potential Spectre v1
[ Upstream commit ced9e191501e52b95e1b57b8e0db00943869eed0 ]
pool 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/atm/zatm.c:1491 zatm_ioctl() warn: potential spectre issue
'zatm_dev->pool_info' (local cap)
Fix this by sanitizing pool before using it to index
zatm_dev->pool_info
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/dccp')
0 files changed, 0 insertions, 0 deletions