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| author | Ondrej Mosnacek <omosnace@redhat.com> | 2019-06-12 10:12:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-26 09:14:07 +0200 |
| commit | 914026d581007a67a911630a0a8afebdbe7d41d3 (patch) | |
| tree | 3861a4bb44904fc67f4e65cc138ed147fa8c5d36 /include/uapi/linux/ppdev.h | |
| parent | 10e3788e6575e370c63f3f6aa501b19c3b5aa9f6 (diff) | |
selinux: fix empty write to keycreate file
[ Upstream commit 464c258aa45b09f16aa0f05847ed8895873262d9 ]
When sid == 0 (we are resetting keycreate_sid to the default value), we
should skip the KEY__CREATE check.
Before this patch, doing a zero-sized write to /proc/self/keycreate
would check if the current task can create unlabeled keys (which would
usually fail with -EACCESS and generate an AVC). Now it skips the check
and correctly sets the task's keycreate_sid to 0.
Bug report: https://bugzilla.redhat.com/show_bug.cgi?id=1719067
Tested using the reproducer from the report above.
Fixes: 4eb582cf1fbd ("[PATCH] keys: add a way to store the appropriate context for newly-created keys")
Reported-by: Kir Kolyshkin <kir@sacred.ru>
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/uapi/linux/ppdev.h')
0 files changed, 0 insertions, 0 deletions