This is a note to let you know that I've just added the patch titled
bpf: Fix tr dereferencing
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bpf-fix-tr-dereferencing.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3465a779fb79aa7fea2b33fd0e851e873e4cf038
Author: Leon Hwang <hffilwlqm@xxxxxxxxx>
Date: Sun Sep 17 23:38:46 2023 +0800
bpf: Fix tr dereferencing
[ 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@xxxxxxxxx/
Fixes: f7b12b6fea00 ("bpf: verifier: refactor check_attach_btf_id()")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Leon Hwang <hffilwlqm@xxxxxxxxx>
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
Link: https://lore.kernel.org/bpf/20230917153846.88732-1-hffilwlqm@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 84efd8dd139d9..9ab087d73ab34 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -840,7 +840,7 @@ 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)
