On 8/13/20 11:28 AM, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: fb893de3 Merge tag 'tag-chrome-platform-for-v5.9' of git:/.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=167ed216900000 > kernel config: https://syzkaller.appspot.com/x/.config?x=f1fedc63022bf07e > dashboard link: https://syzkaller.appspot.com/bug?extid=25d82ed5cc4b474f1df8 > compiler: gcc (GCC) 10.1.0-syz 20200507 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=107bc222900000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17a09d06900000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+25d82ed5cc4b474f1df8@xxxxxxxxxxxxxxxxxxxxxxxxx > > ================================================================== > BUG: KASAN: use-after-free in radix_tree_next_slot include/linux/radix-tree.h:421 [inline] > BUG: KASAN: use-after-free in idr_for_each+0x206/0x220 lib/idr.c:202 > Read of size 8 at addr ffff888082058c78 by task syz-executor999/3765 Should already be fixed by: commit 6d816e088c359866f9867057e04f244c608c42fe Author: Jens Axboe <axboe@xxxxxxxxx> Date: Tue Aug 11 08:04:14 2020 -0600 io_uring: hold 'ctx' reference around task_work queue + execute which is going upstream soon. #syz dup: KASAN: use-after-free Read in io_async_task_func -- Jens Axboe
