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Kernel: Activate CONFIG_HARDENED_USERCOPY

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This adds additional checks to the copy_from_user() and copy_to_user()
functions. The details are described in this article:
https://lwn.net/Articles/695991/

This should only have a very small performance impact on system calls
and should not affect routing performance.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Hauke Mehrtens 2019-04-07 16:38:44 +02:00
parent bdaaf66e28
commit 9b1239451d
3 changed files with 7 additions and 3 deletions
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3
target/linux/generic/config-4.14
View File

@ -1593,7 +1593,8 @@ CONFIG_GENERIC_NET_UTILS=y
# CONFIG_HAMACHI is not set
# CONFIG_HAMRADIO is not set
# CONFIG_HAPPYMEAL is not set
# CONFIG_HARDENED_USERCOPY is not set
CONFIG_HARDENED_USERCOPY=y
# CONFIG_HARDENED_USERCOPY_PAGESPAN is not set
# CONFIG_HARDLOCKUP_DETECTOR is not set
# CONFIG_HAVE_AOUT is not set
CONFIG_HAVE_ARCH_HARDENED_USERCOPY=y

4
target/linux/generic/config-4.19
View File

@ -1688,7 +1688,9 @@ CONFIG_GPIOLIB_FASTPATH_LIMIT=512
# CONFIG_HAMACHI is not set
# CONFIG_HAMRADIO is not set
# CONFIG_HAPPYMEAL is not set
# CONFIG_HARDENED_USERCOPY is not set
CONFIG_HARDENED_USERCOPY=y
# CONFIG_HARDENED_USERCOPY_FALLBACK is not set
# CONFIG_HARDENED_USERCOPY_PAGESPAN is not set
CONFIG_HARDEN_EL2_VECTORS=y
# CONFIG_HARDLOCKUP_DETECTOR is not set
# CONFIG_HAVE_AOUT is not set

3
target/linux/generic/config-4.9
View File

@ -1439,7 +1439,8 @@ CONFIG_GENERIC_NET_UTILS=y
# CONFIG_HAMACHI is not set
# CONFIG_HAMRADIO is not set
# CONFIG_HAPPYMEAL is not set
# CONFIG_HARDENED_USERCOPY is not set
CONFIG_HARDENED_USERCOPY=y
# CONFIG_HARDENED_USERCOPY_PAGESPAN is not set
# CONFIG_HARDLOCKUP_DETECTOR is not set
# CONFIG_HAVE_AOUT is not set
CONFIG_HAVE_ARCH_HARDENED_USERCOPY=y