Re: linux-next boot error: WARNING in kmem_cache_free

2020-06-27 Thread Qian Cai
> On Jun 27, 2020, at 7:10 PM, Eric Biggers wrote: > > This bug also got reported 2 days later by the kernel test robot > (lore.kernel.org/lkml/20200623090213.GW5535@shao2-debian/). > Then it was fixed by commit 437edcaafbe3, so telling syzbot: > > #syz fix: mm, slab/slub: improve error repor

Re: linux-next boot error: WARNING in kmem_cache_free

2020-06-27 Thread Eric Biggers
[+Cc linux-mm; +Bcc linux-fsdevel] On Mon, Jun 22, 2020 at 03:28:09AM -0400, Qian Cai wrote: > > > > On Jun 22, 2020, at 2:42 AM, Dmitry Vyukov wrote: > > > > There is a reason, it's still important for us. > > But also it's not our strategy to deal with bugs by not testing > > configurations

Re: linux-next boot error: WARNING in kmem_cache_free

2020-06-22 Thread Qian Cai
> On Jun 22, 2020, at 2:42 AM, Dmitry Vyukov wrote: > > There is a reason, it's still important for us. > But also it's not our strategy to deal with bugs by not testing > configurations and closing eyes on bugs, right? If it's an official > config in the kernel, it needs to be tested. If SLAB

Re: linux-next boot error: WARNING in kmem_cache_free

2020-06-21 Thread Dmitry Vyukov
On Mon, Jun 22, 2020 at 8:29 AM Qian Cai wrote: > > On Jun 22, 2020, at 1:37 AM, syzbot > > wrote: > > > > WARNING: CPU: 0 PID: 0 at mm/slab.h:232 kmem_cache_free+0x0/0x200 > > mm/slab.c:2262 > > Is there any particular reason to use CONFIG_SLAB rather than CONFIG_SLUB? There is a reason, it's

Re: linux-next boot error: WARNING in kmem_cache_free

2020-06-21 Thread Qian Cai
> On Jun 22, 2020, at 1:37 AM, syzbot > wrote: > > WARNING: CPU: 0 PID: 0 at mm/slab.h:232 kmem_cache_free+0x0/0x200 > mm/slab.c:2262 Is there any particular reason to use CONFIG_SLAB rather than CONFIG_SLUB? You are really asking for trouble to test something that almost nobody is exerci

linux-next boot error: WARNING in kmem_cache_free

2020-06-21 Thread syzbot
Hello, syzbot found the following crash on: HEAD commit:5a94f5bc Add linux-next specific files for 20200621 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12a02c7610 kernel config: https://syzkaller.appspot.com/x/.config?x=e1788c418b2ddc66 dashboard