chore(bpf): remove memset in _READ() macros

The `bpf_probe_read_kernel` / `bpf_probe_read_user` perform memset to zero in case they fail. Avoid duplication and safe few insns. Co-authored-by: Federico Di Pierro <[email protected]> Signed-off-by: Hendrik Brueckner <[email protected]>
falcosecurity · Feb 6, 2023 · 7133250 · 7133250
1 parent 88b93cc
commit 7133250
Showing 1 changed file with 0 additions and 2 deletions.
diff --git a/driver/bpf/plumbing_helpers.h b/driver/bpf/plumbing_helpers.h
@@ -17,13 +17,11 @@ or GPL2.txt for full copies of the license.
 #include "builtins.h"
 
 #define _READ(P) ({ typeof(P) _val;					\
-		    memset(&_val, 0, sizeof(_val));			\
 		    bpf_probe_read_kernel(&_val, sizeof(_val), &P);	\
 		    _val;						\
 		 })
 #define _READ_KERNEL(P) _READ(P)
 #define _READ_USER(P) ({ typeof(P) _val;				\
-			 memset(&_val, 0, sizeof(_val));		\
 			 bpf_probe_read_user(&_val, sizeof(_val), &P);	\
 			 _val;						\
 		 })