Re: [PATCH] IDE-TAPE NULL terminate strings.

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Hello.

Mark de Wever wrote:

.. and I know why :). Those ide_tape_obj members (char fw_rev[6], vendor_id[10],
product_id[18]) were used only once in idetape_get_inquiry_results() so I moved
them there as local stack variables. Originally, they were kzalloc'ed as part of
struct ide_tape_obj and now they contain stack garbage therefore the funny
values. The simple solution would be to zero them out or:


Does the following patch help?

Yes feel free to add my tested-by.

  And my NAK too. :-)

Only not sure whether the static is the best solution, the following
patch also works, by zeroing the memory as you suggested.

Signed-off-by: Mark de Wever <koraq@xxxxxxxxx>

diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 1bce84b..c41f5b1 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -2338,7 +2338,7 @@ static void idetape_get_inquiry_results(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
 	struct ide_atapi_pc pc;
-	char fw_rev[6], vendor_id[10], product_id[18];
+	char fw_rev[6] = {'\0'}, vendor_id[10] = {'\0'}, product_id[18] = {'\0'};

Do you realize how much *absolutely unnecessary* code will this bring in? This is certainly worse than your initial patch (if it was correct).
Ugh, looks like I'll have t submit the patch myself to stop this ugliness...

MBR, Sergei


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