In mptsas_setup_wide_ports() the calculation of phy bitmask is a subject
to undefined behavior when phy index exceeds the width of type 'int', but
is still less than 64.
Utilize BIT_ULL macro to fix this.
Found by Linux Verification Center (linuxtesting.org) with SVACE static
analysis tool.
Fixes: 547f9a218436 ("[SCSI] mptsas: wide port support")
Cc: stable@xxxxxxxxxxxxxxx
Co-developed-by: Aleksandr Mishin <amishin@xxxxxxxxxx>
Signed-off-by: Aleksandr Mishin <amishin@xxxxxxxxxx>
Signed-off-by: Fedor Pchelkin <pchelkin@xxxxxxxxx>
---
struct mptsas_portinfo_details::phy_bitmask is used only in various
logging printks throughout the driver. Another option would be to drop
this field completely if it is considered a more appropriate solution..
drivers/message/fusion/mptsas.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index 7e79da9684ed..cd95655f1592 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -43,6 +43,7 @@
*/
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
+#include <linux/bits.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
@@ -880,7 +881,7 @@ mptsas_setup_wide_ports(MPT_ADAPTER *ioc, struct mptsas_portinfo *port_info)
"%s: [%p]: deleting phy = %d\n",
ioc->name, __func__, port_details, i));
port_details->num_phys--;
- port_details->phy_bitmask &= ~ (1 << phy_info->phy_id);
+ port_details->phy_bitmask &= ~BIT_ULL(phy_info->phy_id);
memset(&phy_info->attached, 0, sizeof(struct mptsas_devinfo));
if (phy_info->phy) {
devtprintk(ioc, dev_printk(KERN_DEBUG,
@@ -915,7 +916,7 @@ mptsas_setup_wide_ports(MPT_ADAPTER *ioc, struct mptsas_portinfo *port_info)
port_details->port_info = port_info;
if (phy_info->phy_id < 64 )
port_details->phy_bitmask |=
- (1 << phy_info->phy_id);
+ BIT_ULL(phy_info->phy_id);
phy_info->sas_port_add_phy=1;
dsaswideprintk(ioc, printk(MYIOC_s_DEBUG_FMT "\t\tForming port\n\t\t"
"phy_id=%d sas_address=0x%018llX\n",
@@ -957,7 +958,7 @@ mptsas_setup_wide_ports(MPT_ADAPTER *ioc, struct mptsas_portinfo *port_info)
phy_info_cmp->port_details = port_details;
if (phy_info_cmp->phy_id < 64 )
port_details->phy_bitmask |=
- (1 << phy_info_cmp->phy_id);
+ BIT_ULL(phy_info_cmp->phy_id);
port_details->num_phys++;
}
}
--
2.48.1
