diff mbox series

[v3,03/11] rocker: mark rocker_tlv_put_* functions as noinline_if_stackbloat

Message ID 20170622171355.267192-4-arnd@arndb.de
State New
Headers show
Series bring back stack frame warning with KASAN | expand

Commit Message

Arnd Bergmann June 22, 2017, 5:13 p.m. UTC 
Inlining these functions creates lots of stack variables when KASAN is
enabled, leading to this warning about potential stack overflow:

drivers/net/ethernet/rocker/rocker_ofdpa.c: In function 'ofdpa_cmd_flow_tbl_add':
drivers/net/ethernet/rocker/rocker_ofdpa.c:621:1: error: the frame size of 2752 bytes is larger than 1536 bytes [-Werror=frame-larger-than=]

This marks all of them noinline_if_stackbloat, which solves the problem by
keeping the redzone inside of the separate stack frames.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

---
 drivers/net/ethernet/rocker/rocker_tlv.h | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

-- 
2.9.0
diff mbox series

Patch

diff --git a/drivers/net/ethernet/rocker/rocker_tlv.h b/drivers/net/ethernet/rocker/rocker_tlv.h
index a63ef82e7c72..8970a414eb5b 100644
--- a/drivers/net/ethernet/rocker/rocker_tlv.h
+++ b/drivers/net/ethernet/rocker/rocker_tlv.h
@@ -139,38 +139,38 @@  rocker_tlv_start(struct rocker_desc_info *desc_info)
 int rocker_tlv_put(struct rocker_desc_info *desc_info,
 		   int attrtype, int attrlen, const void *data);
 
-static inline int rocker_tlv_put_u8(struct rocker_desc_info *desc_info,
-				    int attrtype, u8 value)
+static noinline_if_stackbloat int
+rocker_tlv_put_u8(struct rocker_desc_info *desc_info, int attrtype, u8 value)
 {
 	return rocker_tlv_put(desc_info, attrtype, sizeof(u8), &value);
 }
 
-static inline int rocker_tlv_put_u16(struct rocker_desc_info *desc_info,
-				     int attrtype, u16 value)
+static noinline_if_stackbloat int
+rocker_tlv_put_u16(struct rocker_desc_info *desc_info, int attrtype, u16 value)
 {
 	return rocker_tlv_put(desc_info, attrtype, sizeof(u16), &value);
 }
 
-static inline int rocker_tlv_put_be16(struct rocker_desc_info *desc_info,
-				      int attrtype, __be16 value)
+static noinline_if_stackbloat int
+rocker_tlv_put_be16(struct rocker_desc_info *desc_info, int attrtype, __be16 value)
 {
 	return rocker_tlv_put(desc_info, attrtype, sizeof(__be16), &value);
 }
 
-static inline int rocker_tlv_put_u32(struct rocker_desc_info *desc_info,
-				     int attrtype, u32 value)
+static noinline_if_stackbloat int
+rocker_tlv_put_u32(struct rocker_desc_info *desc_info, int attrtype, u32 value)
 {
 	return rocker_tlv_put(desc_info, attrtype, sizeof(u32), &value);
 }
 
-static inline int rocker_tlv_put_be32(struct rocker_desc_info *desc_info,
-				      int attrtype, __be32 value)
+static noinline_if_stackbloat int
+rocker_tlv_put_be32(struct rocker_desc_info *desc_info, int attrtype, __be32 value)
 {
 	return rocker_tlv_put(desc_info, attrtype, sizeof(__be32), &value);
 }
 
-static inline int rocker_tlv_put_u64(struct rocker_desc_info *desc_info,
-				     int attrtype, u64 value)
+static noinline_if_stackbloat int
+rocker_tlv_put_u64(struct rocker_desc_info *desc_info, int attrtype, u64 value)
 {
 	return rocker_tlv_put(desc_info, attrtype, sizeof(u64), &value);
 }