GitHub Workflows security hardening #129
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Signed-off-by: sashashura <93376818+sashashura@users.noreply.github.com>
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An example of a recent workflow run with unrestricted permissions: |
okias
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Dec 27, 2023
…egdef.h The script checkpatch.pl reported spelling error in rtl871x_mp_phy_regdef.h as below: ''' WARNING: 'Tranceiver' may be misspelled - perhaps 'Transceiver'? grate-driver#129: #define rFPGA0_XA_LSSIReadBack 0x8a0 /* Tranceiver LSSI Readback */ ^^^^^^^^^^ ''' This patch corrects a spelling error, changing "Tranceiver" to "Transceiver." Signed-off-by: Dipendra Khadka <kdipendra88@gmail.com> Link: https://lore.kernel.org/r/20231217165444.448133-1-kdipendra88@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
okias
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Jan 11, 2024
Like commit 1cf3bfc ("bpf: Support 64-bit pointers to kfuncs") for s390x, add support for 64-bit pointers to kfuncs for LoongArch. Since the infrastructure is already implemented in BPF core, the only thing need to be done is to override bpf_jit_supports_far_kfunc_call(). Before this change, several test_verifier tests failed: # ./test_verifier | grep # | grep FAIL grate-driver#119/p calls: invalid kfunc call: ptr_to_mem to struct with non-scalar FAIL grate-driver#120/p calls: invalid kfunc call: ptr_to_mem to struct with nesting depth > 4 FAIL grate-driver#121/p calls: invalid kfunc call: ptr_to_mem to struct with FAM FAIL grate-driver#122/p calls: invalid kfunc call: reg->type != PTR_TO_CTX FAIL grate-driver#123/p calls: invalid kfunc call: void * not allowed in func proto without mem size arg FAIL grate-driver#124/p calls: trigger reg2btf_ids[reg->type] for reg->type > __BPF_REG_TYPE_MAX FAIL grate-driver#125/p calls: invalid kfunc call: reg->off must be zero when passed to release kfunc FAIL grate-driver#126/p calls: invalid kfunc call: don't match first member type when passed to release kfunc FAIL grate-driver#127/p calls: invalid kfunc call: PTR_TO_BTF_ID with negative offset FAIL grate-driver#128/p calls: invalid kfunc call: PTR_TO_BTF_ID with variable offset FAIL grate-driver#129/p calls: invalid kfunc call: referenced arg needs refcounted PTR_TO_BTF_ID FAIL grate-driver#130/p calls: valid kfunc call: referenced arg needs refcounted PTR_TO_BTF_ID FAIL #486/p map_kptr: ref: reference state created and released on xchg FAIL This is because the kfuncs in the loaded module are far away from __bpf_call_base: ffff800002009440 t bpf_kfunc_call_test_fail1 [bpf_testmod] 9000000002e128d8 T __bpf_call_base The offset relative to __bpf_call_base does NOT fit in s32, which breaks the assumption in BPF core. Enable bpf_jit_supports_far_kfunc_call() lifts this limit. Note that to reproduce the above result, tools/testing/selftests/bpf/config should be applied, and run the test with JIT enabled, unpriv BPF enabled. With this change, the test_verifier tests now all passed: # ./test_verifier ... Summary: 777 PASSED, 0 SKIPPED, 0 FAILED Tested-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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This PR adds explicit permissions section to workflows. This is a security best practice because by default workflows run with extended set of permissions (except from
on: pull_requestfrom external forks). By specifying any permission explicitly all others are set to none. By using the principle of least privilege the damage a compromised workflow can do (because of an injection or compromised third party tool or action) is restricted.It is recommended to have most strict permissions on the top level and grant write permissions on job level case by case.