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authorMicah Morton <mortonm@chromium.org>2022-06-08 23:57:11 +0300
committerMicah Morton <mortonm@chromium.org>2022-07-15 21:21:49 +0300
commitfcfe0ac2fcfae7d5fcad3d0375cb8ff38caf8aba (patch)
tree5cb709520c62f77b5a276d77d069a0238b2443ae /include/linux/lsm_hooks.h
parenta1732d6898ced0523cb4073c7f02d236edf312b1 (diff)
downloadlinux-fcfe0ac2fcfae7d5fcad3d0375cb8ff38caf8aba.tar.xz
security: Add LSM hook to setgroups() syscall
Give the LSM framework the ability to filter setgroups() syscalls. There are already analagous hooks for the set*uid() and set*gid() syscalls. The SafeSetID LSM will use this new hook to ensure setgroups() calls are allowed by the installed security policy. Tested by putting print statement in security_task_fix_setgroups() hook and confirming that it gets hit when userspace does a setgroups() syscall. Acked-by: Casey Schaufler <casey@schaufler-ca.com> Reviewed-by: Serge Hallyn <serge@hallyn.com> Signed-off-by: Micah Morton <mortonm@chromium.org>
Diffstat (limited to 'include/linux/lsm_hooks.h')
-rw-r--r--include/linux/lsm_hooks.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 91c8146649f5..84a0d7e02176 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -702,6 +702,13 @@
* @old is the set of credentials that are being replaced.
* @flags contains one of the LSM_SETID_* values.
* Return 0 on success.
+ * @task_fix_setgroups:
+ * Update the module's state after setting the supplementary group
+ * identity attributes of the current process.
+ * @new is the set of credentials that will be installed. Modifications
+ * should be made to this rather than to @current->cred.
+ * @old is the set of credentials that are being replaced.
+ * Return 0 on success.
* @task_setpgid:
* Check permission before setting the process group identifier of the
* process @p to @pgid.