diff options
Diffstat (limited to 'kernel/seccomp.c')
| -rw-r--r-- | kernel/seccomp.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/kernel/seccomp.c b/kernel/seccomp.c index b6ea3dcb57bf..55a6184f5990 100644 --- a/kernel/seccomp.c +++ b/kernel/seccomp.c @@ -268,16 +268,14 @@ static u32 seccomp_run_filters(const struct seccomp_data *sd, * All filters in the list are evaluated and the lowest BPF return * value always takes priority (ignoring the DATA). */ - preempt_disable(); for (; f; f = f->prev) { - u32 cur_ret = BPF_PROG_RUN(f->prog, sd); + u32 cur_ret = bpf_prog_run_pin_on_cpu(f->prog, sd); if (ACTION_ONLY(cur_ret) < ACTION_ONLY(ret)) { ret = cur_ret; *match = f; } } - preempt_enable(); return ret; } #endif /* CONFIG_SECCOMP_FILTER */ @@ -528,8 +526,12 @@ static long seccomp_attach_filter(unsigned int flags, int ret; ret = seccomp_can_sync_threads(); - if (ret) - return ret; + if (ret) { + if (flags & SECCOMP_FILTER_FLAG_TSYNC_ESRCH) + return -ESRCH; + else + return ret; + } } /* Set log flag, if present. */ @@ -1221,6 +1223,7 @@ static const struct file_operations seccomp_notify_ops = { .poll = seccomp_notify_poll, .release = seccomp_notify_release, .unlocked_ioctl = seccomp_notify_ioctl, + .compat_ioctl = seccomp_notify_ioctl, }; static struct file *init_listener(struct seccomp_filter *filter) @@ -1288,10 +1291,12 @@ static long seccomp_set_mode_filter(unsigned int flags, * In the successful case, NEW_LISTENER returns the new listener fd. * But in the failure case, TSYNC returns the thread that died. If you * combine these two flags, there's no way to tell whether something - * succeeded or failed. So, let's disallow this combination. + * succeeded or failed. So, let's disallow this combination if the user + * has not explicitly requested no errors from TSYNC. */ if ((flags & SECCOMP_FILTER_FLAG_TSYNC) && - (flags & SECCOMP_FILTER_FLAG_NEW_LISTENER)) + (flags & SECCOMP_FILTER_FLAG_NEW_LISTENER) && + ((flags & SECCOMP_FILTER_FLAG_TSYNC_ESRCH) == 0)) return -EINVAL; /* Prepare the new filter before holding any locks. */ |