usb: storage: sddr55: Reject out-of-bound new_pba

Discovered by Atuin - Automated Vulnerability Discovery Engine.

new_pba comes from the status packet returned after each write.
A bogus device could report values beyond the block count derived
from info->capacity, letting the driver walk off the end of
pba_to_lba[] and corrupt heap memory.

Reject PBAs that exceed the computed block count and fail the
transfer so we avoid touching out-of-range mapping entries.

Signed-off-by: Tianchu Chen <[e-mail]>
Cc: stable <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/storage/sddr55.c

···
 		new_pba = (status[3] + (status[4] << 8) + (status[5] << 16))
 						  >> info->blockshift;
 
+		/* check if device-reported new_pba is out of range */
+		if (new_pba >= (info->capacity >> (info->blockshift + info->pageshift))) {
+			result = USB_STOR_TRANSPORT_FAILED;
+			goto leave;
+		}
+
 		/* check status for error */
 		if (status[0] == 0xff && status[1] == 0x4) {
 			info->pba_to_lba[new_pba] = BAD_BLOCK;