The bpf_ksym_find must be called with RCU read protection, wrap the call
to bpf_ksym_find in bpf_prog_ksym_find with RCU read lock so that
callers do not have to care about holding it specifically.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx>
---
kernel/bpf/core.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 8d381ca9f2fa..959538f91c60 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -782,7 +782,11 @@ bool is_bpf_text_address(unsigned long addr)
struct bpf_prog *bpf_prog_ksym_find(unsigned long addr)
{
- struct bpf_ksym *ksym = bpf_ksym_find(addr);
+ struct bpf_ksym *ksym;
+
+ rcu_read_lock();
+ ksym = bpf_ksym_find(addr);
+ rcu_read_unlock();
return ksym && ksym->prog ?
container_of(ksym, struct bpf_prog_aux, ksym)->prog :
--
2.47.1
