Commit b724a641 authored by Leon Hwang's avatar Leon Hwang Committed by Andrii Nakryiko
Browse files

bpf: Fix tr dereferencing 

Fix 'tr' dereferencing bug when CONFIG_BPF_JIT is turned off.

When CONFIG_BPF_JIT is turned off, 'bpf_trampoline_get()' returns NULL,
which is same as the cases when CONFIG_BPF_JIT is turned on.

Closes: https://lore.kernel.org/r/202309131936.5Nc8eUD0-lkp@intel.com/


Fixes: f7b12b6f ("bpf: verifier: refactor check_attach_btf_id()")
Reported-by: default avatarkernel test robot <lkp@intel.com>
Reported-by: default avatarDan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: default avatarLeon Hwang <hffilwlqm@gmail.com>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230917153846.88732-1-hffilwlqm@gmail.com
parent 9032598e

include/linux/bpf.h

+1 −1
Original line number Diff line number Diff line
@@ -1307,7 +1307,7 @@ static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link, 
static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,

							struct bpf_attach_target_info *tgt_info)

{

	return ERR_PTR(-EOPNOTSUPP);

	return NULL;

}

static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}

#define DEFINE_BPF_DISPATCHER(name)