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LSM: SafeSetID: fix userns handling in securityfs
authorJann Horn <jannh@google.com>
Wed, 10 Apr 2019 16:55:58 +0000 (09:55 -0700)
committerMicah Morton <mortonm@chromium.org>
Mon, 15 Jul 2019 15:07:19 +0000 (08:07 -0700)
commit71a98971b932174e121bc19056475c601598132f
treefb3a1ee4a8b7cdec81b2f0671524a25af4b5b016tree | snapshot
parent78ae7df96d647627ceae0b65eea9e4f83a0a4b66commit | diff
LSM: SafeSetID: fix userns handling in securityfs

Looking at current_cred() in write handlers is bad form, stop doing that.

Also, let's just require that the write is coming from the initial user
namespace. Especially SAFESETID_WHITELIST_FLUSH requires privilege over all
namespaces, and SAFESETID_WHITELIST_ADD should probably require it as well.

Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Micah Morton <mortonm@chromium.org>
security/safesetid/securityfs.c diff | blob | history
Domain: System / Kernel;