Re: [syzbot] [mtd?] divide error in block2mtd_setup2
Jörn Engel <[email protected]>
| Newsgroups | org.infradead.lists.linux-mtd,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
On Sun, Aug 09, 2026 at 05:34:28PM -0700, syzbot wrote:
>
> * 2a: f7 f6 div %esi <-- trapping instruction
Best guess would be this:
if ((long)size % erase_size) {
Someone passing an erase_size of 0 would indeed trigger an exception.
Fix would be something like this:
- if ((long)size % erase_size) {
+ if (!erase_size || (long)size % erase_size) {
I haven't touched the code is nearly two decades. If somebody else
feels like sending a patch and gathering all the glory, please be my
guest!
Jörn
--
Those who come seeking peace without a treaty are plotting.
-- Sun Tzu
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