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32 lines
1.4 KiB
Diff
32 lines
1.4 KiB
Diff
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Pratyush <codelab@pratyush.dev>
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Date: Thu, 12 Aug 2021 00:15:25 +0530
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Subject: [PATCH] use uid instead of app id for tracking INTERNET permission
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Change-Id: Ibec846480f3b440b5a323c86efa95c2fd1d81284
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---
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bpf_progs/netd.c | 10 ++--------
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1 file changed, 2 insertions(+), 8 deletions(-)
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diff --git a/bpf_progs/netd.c b/bpf_progs/netd.c
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index 1362be25..69b618f8 100644
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--- a/bpf_progs/netd.c
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+++ b/bpf_progs/netd.c
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@@ -74,14 +74,8 @@ DEFINE_BPF_MAP(uid_permission_map, HASH, uint32_t, uint8_t, UID_OWNER_MAP_SIZE)
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SEC("cgroupsock/inet/create")
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int inet_socket_create(struct bpf_sock* sk) {
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uint64_t gid_uid = bpf_get_current_uid_gid();
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- /*
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- * A given app is guaranteed to have the same app ID in all the profiles in
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- * which it is installed, and install permission is granted to app for all
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- * user at install time so we only check the appId part of a request uid at
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- * run time. See UserHandle#isSameApp for detail.
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- */
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- uint32_t appId = (gid_uid & 0xffffffff) % PER_USER_RANGE;
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- uint8_t* permissions = bpf_uid_permission_map_lookup_elem(&appId);
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+ uint32_t uid = (gid_uid & 0xffffffff);
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+ uint8_t* permissions = bpf_uid_permission_map_lookup_elem(&uid);
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if (!permissions) {
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// UID not in map. Default to just INTERNET permission.
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return 1;
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