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offload.c - make tether_error_map read only.

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Bug: 254543135
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I5d4c9cad66f59bd7eed54323ba72ea5a54ddf5e1
This commit is contained in:
Maciej Żenczykowski
2022-10-20 00:13:15 +00:00
parent efb5d60243
commit be25f96390
1 changed files with 5 additions and 2 deletions
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7
bpf_progs/offload.c
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@@ -91,8 +91,11 @@
// ----- Tethering Error Counters ----- // ----- Tethering Error Counters -----
DEFINE_BPF_MAP_GRW(tether_error_map, ARRAY, uint32_t, uint32_t, BPF_TETHER_ERR__MAX, // Note that pre-T devices with Mediatek chipsets may have a kernel bug (bad patch
TETHERING_GID) // "[ALPS05162612] bpf: fix ubsan error") making it impossible to write to non-zero
// offset of bpf map ARRAYs. This file (offload.o) loads on T, but luckily this
// array is only written by bpf code, and only read by userspace.
DEFINE_BPF_MAP_RO(tether_error_map, ARRAY, uint32_t, uint32_t, BPF_TETHER_ERR__MAX, TETHERING_GID)
#define COUNT_AND_RETURN(counter, ret) do { \ #define COUNT_AND_RETURN(counter, ret) do { \
uint32_t code = BPF_TETHER_ERR_ ## counter; \ uint32_t code = BPF_TETHER_ERR_ ## counter; \