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| author |   Micah Morton <mortonm@chromium.org> | 2022-06-08 20:57:11 +0000 |
|---|---|---|
| committer | Micah Morton <mortonm@chromium.org> | 2022-07-15 18:21:49 +0000 |
| commit | fcfe0ac2fcfae7d5fcad3d0375cb8ff38caf8aba (patch) | |
| tree | 5cb709520c62f77b5a276d77d069a0238b2443ae /security/security.c | |
| parent | LSM: SafeSetID: add GID testing to selftest (diff) | |
| download | linux-dev-fcfe0ac2fcfae7d5fcad3d0375cb8ff38caf8aba.tar.xz linux-dev-fcfe0ac2fcfae7d5fcad3d0375cb8ff38caf8aba.zip | |
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 'security/security.c')
| -rw-r--r-- | security/security.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/security/security.c b/security/security.c index 188b8f782220..15c686145ad6 100644 --- a/security/security.c +++ b/security/security.c @@ -1803,6 +1803,11 @@ int security_task_fix_setgid(struct cred *new, const struct cred *old, return call_int_hook(task_fix_setgid, 0, new, old, flags); } +int security_task_fix_setgroups(struct cred *new, const struct cred *old) +{ + return call_int_hook(task_fix_setgroups, 0, new, old); +} + int security_task_setpgid(struct task_struct *p, pid_t pgid) { return call_int_hook(task_setpgid, 0, p, pgid); |