AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/drivers/atm
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Gustavo A. R. Silva ea443e5e98 atm: iphase: Fix Spectre v1 vulnerability 
board 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:

drivers/atm/iphase.c:2765 ia_ioctl() warn: potential spectre issue 'ia_dev' [r] (local cap)
drivers/atm/iphase.c:2774 ia_ioctl() warn: possible spectre second half.  'iadev'
drivers/atm/iphase.c:2782 ia_ioctl() warn: possible spectre second half.  'iadev'
drivers/atm/iphase.c:2816 ia_ioctl() warn: possible spectre second half.  'iadev'
drivers/atm/iphase.c:2823 ia_ioctl() warn: possible spectre second half.  'iadev'
drivers/atm/iphase.c:2830 ia_ioctl() warn: potential spectre issue '_ia_dev' [r] (local cap)
drivers/atm/iphase.c:2845 ia_ioctl() warn: possible spectre second half.  'iadev'
drivers/atm/iphase.c:2856 ia_ioctl() warn: possible spectre second half.  'iadev'

Fix this by sanitizing board before using it to index ia_dev and _ia_dev

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>
2019-08-02 17:30:36 -07:00
..
.gitignore
adummy.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
ambassador.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 37 2019-05-24 17:27:11 +02:00
ambassador.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 37 2019-05-24 17:27:11 +02:00
atmtcp.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
eni.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
eni.h
firestream.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 37 2019-05-24 17:27:11 +02:00
firestream.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 37 2019-05-24 17:27:11 +02:00
fore200e.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
fore200e.h fore200e: devirtualize dma alloc calls 2018-10-10 22:38:50 -07:00
he.c atm: he: fix sign-extension overflow on large shift 2019-01-17 11:27:00 -08:00
he.h
horizon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 37 2019-05-24 17:27:11 +02:00
horizon.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 37 2019-05-24 17:27:11 +02:00
idt77105.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
idt77105.h
idt77252_tables.h
idt77252.c atm: idt77252: Remove call to memset after dma_alloc_coherent 2019-07-15 11:06:27 -07:00
idt77252.h
iphase.c atm: iphase: Fix Spectre v1 vulnerability 2019-08-02 17:30:36 -07:00
iphase.h
Kconfig
lanai.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
Makefile
midway.h
nicstar.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
nicstar.h
nicstarmac.c
nicstarmac.copyright
solos-attrlist.c
solos-pci.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
suni.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
suni.h
tonga.h
uPD98401.h
uPD98402.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
uPD98402.h
zatm.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
zatm.h
zeprom.h