bpf: Allow const char * from LSM hooks as kfunc const string arguments #6428
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Let the BPF verifier to recognize const char * arguments from LSM hooks (and other BPF program types) as valid const string pointers that can be passed to kfuncs expecting KF_ARG_PTR_TO_CONST_STR. Previously, kfuncs with KF_ARG_PTR_TO_CONST_STR only accepted PTR_TO_MAP_VALUE from readonly maps. This was limiting for LSM programs that receive const char * arguments from hooks like sb_mount's dev_name. Signed-off-by: Song Liu <[email protected]>
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Upstream branch: 688b745 |
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Pull request for series with
subject: bpf: Allow const char * from LSM hooks as kfunc const string arguments
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1028079