While compiling 2.3.40-pre6:
ide-tape.c: In function `idetape_init':
ide-tape.c:5854: warning: `tape' might be used uninitialized in this function
Sure enough, it looks like at line 5869 tape->debug_level
is referenced without tape ever being set to a valid memory address.
At first I thought the "right" answer was to just point to drive->driver_data
as is done in other parts of the program:
--- linux-2.3.40-6/drivers/block/ide-tape.c Thu Jan 20 00:44:12 2000
+++ linux/drivers/block/ide-tape.c Thu Jan 20 01:16:47 2000
@@ -5866,6 +5866,7 @@
ide_register_module (&idetape_module);
MOD_DEC_USE_COUNT;
#if ONSTREAM_DEBUG
+ tape = drive->driver_data;
if (tape->debug_level >= 6)
printk(KERN_INFO "ide-tape: MOD_DEC_USE_COUNT in idetape_init\n");
#endif
But now I'm unclear about this because of how tape is setup later on
during the idetape_setup() call (idetape_init was hard for me to follow)
In either case it does appear that as it stands, if ONSTREAM_DEBUG
is turned on (which it is by default) and the ide_scan_devices
returns NULL, you'll dereference an invalid pointer.
James
-- Miscellaneous Engineer --- IBM Netfinity Performance Development- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Jan 23 2000 - 21:00:21 EST