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| author |   Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-01-09 16:05:10 -0600 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-22 13:34:35 +0100 |
| commit | d7ac3c6ef5d8ce14b6381d52eb7adafdd6c8bb3c (patch) | |
| tree | 80f36428f5a486c7256dbbd2f742dd1e4fbea929 /scripts/ver_linux | |
| parent | hpet: Fix missing '=' character in the __setup() code of hpet_mmap_enable (diff) | |
| download | linux-dev-d7ac3c6ef5d8ce14b6381d52eb7adafdd6c8bb3c.tar.xz linux-dev-d7ac3c6ef5d8ce14b6381d52eb7adafdd6c8bb3c.zip | |
applicom: Fix potential Spectre v1 vulnerabilities
IndexCard 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:
drivers/char/applicom.c:418 ac_write() warn: potential spectre issue 'apbs' [r]
drivers/char/applicom.c:728 ac_ioctl() warn: potential spectre issue 'apbs' [r] (local cap)
Fix this by sanitizing IndexCard before using it to index apbs.
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/
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts/ver_linux')
0 files changed, 0 insertions, 0 deletions