When a character array without a terminating NUL character has a static
initializer, GCC 15's -Wunterminated-string-initialization will only
warn if the array lacks the "nonstring" attribute[1]. There is no reason
for the command lookup logic to not use strcmp(), so grow the string
length and update the check to eliminate the warning:
../drivers/scsi/pm8001/pm8001_ctl.c:652:7: warning: initializer-string for array of 'unsigned char' truncates NUL terminator but destination lacks 'nonstring' attribute (9 chars into 8 available) [-Wunterminated-string-initialization]
652 | {"set_nvmd", FLASH_CMD_SET_NVMD},
| ^~~~~~~~~~
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117178 [1]
Signed-off-by: Kees Cook <kees@xxxxxxxxxx>
---
In taking another look at this, I realize that actually strcmp() should be used,
so just grow the size of this character array and use strcmp().
v1: https://lore.kernel.org/lkml/20250310222553.work.437-kees@xxxxxxxxxx/
v2: Use strcmp()
---
Cc: Jack Wang <jinpu.wang@xxxxxxxxxxxxxxx>
Cc: "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Cc: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Cc: linux-scsi@xxxxxxxxxxxxxxx
---
drivers/scsi/pm8001/pm8001_ctl.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/pm8001/pm8001_ctl.c b/drivers/scsi/pm8001/pm8001_ctl.c
index 85ff95c6543a..bb8fd5f0f441 100644
--- a/drivers/scsi/pm8001/pm8001_ctl.c
+++ b/drivers/scsi/pm8001/pm8001_ctl.c
@@ -644,7 +644,7 @@ static DEVICE_ATTR(gsm_log, S_IRUGO, pm8001_ctl_gsm_log_show, NULL);
#define FLASH_CMD_SET_NVMD 0x02
struct flash_command {
- u8 command[8];
+ u8 command[9];
int code;
};
@@ -825,8 +825,7 @@ static ssize_t pm8001_store_update_fw(struct device *cdev,
}
for (i = 0; flash_command_table[i].code != FLASH_CMD_NONE; i++) {
- if (!memcmp(flash_command_table[i].command,
- cmd_ptr, strlen(cmd_ptr))) {
+ if (!strcmp(flash_command_table[i].command, cmd_ptr)) {
flash_command = flash_command_table[i].code;
break;
}
--
2.34.1
