On Thu, Sep 3, 2015 at 1:49 PM, Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote: > On Wed, Sep 2, 2015 at 9:40 PM, Tejun Heo <tj@xxxxxxxxxx> wrote: >> Hello, Andrey. > > Hello Tejun, > >> On Wed, Sep 02, 2015 at 01:08:52PM +0200, Andrey Konovalov wrote: >>> While running KASAN on 4.2 with Trinity I got the following report: >>> >>> ================================================================== >>> BUG: KASan: use after free in page_cache_async_readahead+0x2cb/0x3f0 >>> at addr ffff880034bf6690 >>> Read of size 8 by task sshd/2571 >>> ============================================================================= >>> BUG kmalloc-16 (Tainted: G W ): kasan: bad access detected >>> ----------------------------------------------------------------------------- >>> >>> Disabling lock debugging due to kernel taint >>> INFO: Allocated in bdi_init+0x168/0x960 age=554826 cpu=0 pid=6 >> >> Can you please verify that the following patch fixes the issue? > > I've hit this bug only twice during 24 hours of fuzzing, so there's no > fast way to verify this. > I'll be testing with your patch now, and I'll let you know if I hit > the bug again. Hello Tejun, I haven't seen any reports while testing with your patch for the last few days, so I think it's safe to say that your patch fixes the issue. Thanks! > > Thanks! -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>