Resolved Coverity Issues reported in SNP Dxe.
1.ComponentName.c (Overflow)
Expression "OffSet--", which is equal to 18446744073709551615, where "OffSet"
is known to be equal to 0, underflows the type that receives it.
2.SnpUndi32GetStatus,SnpUndi32Initialize,SnpUndi32Transmit (Deadcode)
Execution is not reaching as always snp is not equal to NULL
As This pointer is compared with NULL in function start
Macro EFI_SIMPLE_NETWORK_DEV_FROM_THIS always return address in This pointer
3.PxeInit(Overflow)
Expression "Snp->TxRxBufferSize - 1U", where "Snp->TxRxBufferSize" is known to
be equal to 0, underflows the type that receives it
4.SnpUndi32Reset (Not used Variable)
ExtendedVerification variable is assigned but not used in that function.hence
assign
Cc: Saloni Kasbekar <saloni.kasbe...@intel.com>
Cc: Zachary Clark-williams <zachary.clark-willi...@intel.com>
Signed-off-by: SanthoshKumarV <santhoshkum...@ami.com>
---
NetworkPkg/SnpDxe/ComponentName.c | 3 ++-
NetworkPkg/SnpDxe/Get_status.c | 3 ---
NetworkPkg/SnpDxe/Initialize.c | 17 +++++++----------
NetworkPkg/SnpDxe/Reset.c | 3 +--
NetworkPkg/SnpDxe/Transmit.c | 3 ---
5 files changed, 10 insertions(+), 19 deletions(-)
diff --git a/NetworkPkg/SnpDxe/ComponentName.c
b/NetworkPkg/SnpDxe/ComponentName.c
index cc4cc5bddb..7d1360ff46 100644
--- a/NetworkPkg/SnpDxe/ComponentName.c
+++ b/NetworkPkg/SnpDxe/ComponentName.c
@@ -267,7 +267,8 @@ UpdateName (
//
// Remove the last '-'
//
- OffSet--;
+ if (OffSet > 0)
+ OffSet--;
OffSet += UnicodeSPrint (
HandleName + OffSet,
sizeof (HandleName) - OffSet * sizeof (CHAR16),
diff --git a/NetworkPkg/SnpDxe/Get_status.c b/NetworkPkg/SnpDxe/Get_status.c
index 14b678fd36..6f277eb1a4 100644
--- a/NetworkPkg/SnpDxe/Get_status.c
+++ b/NetworkPkg/SnpDxe/Get_status.c
@@ -218,9 +218,6 @@ SnpUndi32GetStatus (
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
- if (Snp == NULL) {
- return EFI_DEVICE_ERROR;
- }
switch (Snp->Mode.State) {
case EfiSimpleNetworkInitialized:
diff --git a/NetworkPkg/SnpDxe/Initialize.c b/NetworkPkg/SnpDxe/Initialize.c
index c219a1cb20..4a15ad1cbd 100644
--- a/NetworkPkg/SnpDxe/Initialize.c
+++ b/NetworkPkg/SnpDxe/Initialize.c
@@ -128,11 +128,13 @@ PxeInit (
);
if (Snp->TxRxBuffer != NULL) {
- Snp->PciIo->FreeBuffer (
- Snp->PciIo,
- SNP_MEM_PAGES (Snp->TxRxBufferSize),
- (VOID *)Snp->TxRxBuffer
- );
+ if (Snp->TxRxBufferSize != 0) {
+ Snp->PciIo->FreeBuffer (
+ Snp->PciIo,
+ SNP_MEM_PAGES (Snp->TxRxBufferSize),
+ (VOID *)Snp->TxRxBuffer
+ );
+ }
}
Snp->TxRxBuffer = NULL;
@@ -196,11 +198,6 @@ SnpUndi32Initialize (
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
- if (Snp == NULL) {
- EfiStatus = EFI_INVALID_PARAMETER;
- goto ON_EXIT;
- }
-
switch (Snp->Mode.State) {
case EfiSimpleNetworkStarted:
break;
diff --git a/NetworkPkg/SnpDxe/Reset.c b/NetworkPkg/SnpDxe/Reset.c
index 2ff685376d..1257cb6d71 100644
--- a/NetworkPkg/SnpDxe/Reset.c
+++ b/NetworkPkg/SnpDxe/Reset.c
@@ -94,9 +94,8 @@ SnpUndi32Reset (
//
// Resolve Warning 4 unreferenced parameter problem
+ // ExtendedVerification is not implemented
//
- ExtendedVerification = 0;
- DEBUG ((DEBUG_WARN, "ExtendedVerification = %d is not implemented!\n",
ExtendedVerification));
if (This == NULL) {
return EFI_INVALID_PARAMETER;
diff --git a/NetworkPkg/SnpDxe/Transmit.c b/NetworkPkg/SnpDxe/Transmit.c
index e2c7467b86..1e4ef2a8c3 100644
--- a/NetworkPkg/SnpDxe/Transmit.c
+++ b/NetworkPkg/SnpDxe/Transmit.c
@@ -289,9 +289,6 @@ SnpUndi32Transmit (
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
- if (Snp == NULL) {
- return EFI_DEVICE_ERROR;
- }
switch (Snp->Mode.State) {
case EfiSimpleNetworkInitialized:
--
2.42.0.windows.2
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