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UPSTREAM: bpf: Fix tr dereferencing

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[ Upstream commit b724a6418f1f853bcb39c8923bf14a50c7bdbd07 ]

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: f7b12b6fea00 ("bpf: verifier: refactor check_attach_btf_id()")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Change-Id: Ifbdaaf8d5575b613bef48d6e30d01f8041d4c5ac
Signed-off-by: Leon Hwang <hffilwlqm@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230917153846.88732-1-hffilwlqm@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Leon Hwang 2023-09-17 23:38:46 +08:00 • committed by basamaryan
commit 558e5f9ce1
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1 changed files with 1 additions and 1 deletions
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2
include/linux/bpf.h
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@ -725,7 +725,7 @@ static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
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)