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| author | Edward Tomasz Napierala <trasz@FreeBSD.org> | 2022-01-28 10:55:11 +0000 |
|---|---|---|
| committer | Edward Tomasz Napierala <trasz@FreeBSD.org> | 2022-01-28 11:45:41 +0000 |
| commit | 99454d3e98ff205881aa7abef39234c9afc7600c (patch) | |
| tree | 165a07b56be03ac7abd481ae7114cc959330fb97 | |
| parent | 612d42e5dc7608d7cdaa12c95b70fe9aff809b0a (diff) | |
| download | src-99454d3e98ff205881aa7abef39234c9afc7600c.tar.gz src-99454d3e98ff205881aa7abef39234c9afc7600c.zip | |
linux: Provide dummy seccomp(2)
Don't emit messages; this isn't any different from a Linux kernel
built without OPTIONS_SECCOMP, so the userspace already needs to know
how to deal with it. This is also similar with how we handle seccomp
in linux_prctl().
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D33808
| -rw-r--r-- | sys/compat/linux/linux_dummy.c | 2 | ||||
| -rw-r--r-- | sys/compat/linux/linux_misc.c | 16 | ||||
| -rw-r--r-- | sys/compat/linux/linux_misc.h | 3 |
3 files changed, 19 insertions, 2 deletions
diff --git a/sys/compat/linux/linux_dummy.c b/sys/compat/linux/linux_dummy.c index 91a56616fc10..e254bf94c026 100644 --- a/sys/compat/linux/linux_dummy.c +++ b/sys/compat/linux/linux_dummy.c @@ -112,8 +112,6 @@ DUMMY(kcmp); DUMMY(finit_module); DUMMY(sched_setattr); DUMMY(sched_getattr); -/* Linux 3.17: */ -DUMMY(seccomp); /* Linux 3.18: */ DUMMY(bpf); /* Linux 3.19: */ diff --git a/sys/compat/linux/linux_misc.c b/sys/compat/linux/linux_misc.c index a8857eda680d..3287c64ab515 100644 --- a/sys/compat/linux/linux_misc.c +++ b/sys/compat/linux/linux_misc.c @@ -2880,3 +2880,19 @@ linux_poll(struct thread *td, struct linux_poll_args *args) tsp, NULL, 0)); } #endif /* __i386__ || __amd64__ */ + +int +linux_seccomp(struct thread *td, struct linux_seccomp_args *args) +{ + + switch (args->op) { + case LINUX_SECCOMP_GET_ACTION_AVAIL: + return (EOPNOTSUPP); + default: + /* + * Ignore unknown operations, just like Linux kernel built + * without CONFIG_SECCOMP. + */ + return (EINVAL); + } +} diff --git a/sys/compat/linux/linux_misc.h b/sys/compat/linux/linux_misc.h index 3bfc9843cda2..9a7cf89466a2 100644 --- a/sys/compat/linux/linux_misc.h +++ b/sys/compat/linux/linux_misc.h @@ -153,6 +153,9 @@ extern int stclohz; /* Linux syslog flags */ #define LINUX_SYSLOG_ACTION_READ_ALL 3 +/* Linux seccomp flags */ +#define LINUX_SECCOMP_GET_ACTION_AVAIL 2 + #if defined(__aarch64__) || (defined(__amd64__) && !defined(COMPAT_LINUX32)) int linux_ptrace_status(struct thread *td, int pid, int status); #endif |