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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-15 10:25:26 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-15 10:25:26 -0700 |
commit | 92d4a03674b8c399c2f547580fa509db78226170 (patch) | |
tree | e5492e0214e31a10a79dbad6135a047f37721fc9 /drivers/base | |
parent | 1eb46908b35dfbac0ec1848d4b1e39667e0187e9 (diff) | |
parent | 87ea58433208d17295e200d56be5e2a4fe4ce7d6 (diff) | |
download | linux-stable-92d4a03674b8c399c2f547580fa509db78226170.tar.gz linux-stable-92d4a03674b8c399c2f547580fa509db78226170.tar.bz2 linux-stable-92d4a03674b8c399c2f547580fa509db78226170.zip |
Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem updates from James Morris:
- kstrdup() return value fix from Eric Biggers
- Add new security_load_data hook to differentiate security checking of
kernel-loaded binaries in the case of there being no associated file
descriptor, from Mimi Zohar.
- Add ability to IMA to specify a policy at build-time, rather than
just via command line params or by loading a custom policy, from
Mimi.
- Allow IMA and LSMs to prevent sysfs firmware load fallback (e.g. if
using signed firmware), from Mimi.
- Allow IMA to deny loading of kexec kernel images, as they cannot be
measured by IMA, from Mimi.
* 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
security: check for kstrdup() failure in lsm_append()
security: export security_kernel_load_data function
ima: based on policy warn about loading firmware (pre-allocated buffer)
module: replace the existing LSM hook in init_module
ima: add build time policy
ima: based on policy require signed firmware (sysfs fallback)
firmware: add call to LSM hook before firmware sysfs fallback
ima: based on policy require signed kexec kernel images
kexec: add call to LSM hook in original kexec_load syscall
security: define new LSM hook named security_kernel_load_data
MAINTAINERS: remove the outdated "LINUX SECURITY MODULE (LSM) FRAMEWORK" entry
Diffstat (limited to 'drivers/base')
-rw-r--r-- | drivers/base/firmware_loader/fallback.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c index 7f732744f0d3..202324291542 100644 --- a/drivers/base/firmware_loader/fallback.c +++ b/drivers/base/firmware_loader/fallback.c @@ -651,6 +651,8 @@ static bool fw_force_sysfs_fallback(enum fw_opt opt_flags) static bool fw_run_sysfs_fallback(enum fw_opt opt_flags) { + int ret; + if (fw_fallback_config.ignore_sysfs_fallback) { pr_info_once("Ignoring firmware sysfs fallback due to sysctl knob\n"); return false; @@ -659,6 +661,11 @@ static bool fw_run_sysfs_fallback(enum fw_opt opt_flags) if ((opt_flags & FW_OPT_NOFALLBACK)) return false; + /* Also permit LSMs and IMA to fail firmware sysfs fallback */ + ret = security_kernel_load_data(LOADING_FIRMWARE); + if (ret < 0) + return ret; + return fw_force_sysfs_fallback(opt_flags); } |