On Thu, Apr 1, 2021 at 3:30 PM Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > > On Wed, Mar 31, 2021 at 02:03:08PM -0700, syzbot wrote: > > syzbot has bisected this issue to: > > > > commit 416dacb819f59180e4d86a5550052033ebb6d72c > > Author: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> > > Date: Wed Aug 21 17:27:12 2019 +0000 > > > > HID: hidraw: Fix invalid read in hidraw_ioctl > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=127430fcd00000 > > start commit: 6e5a03bc ethernet/netronome/nfp: Fix a use after free in n.. > > git tree: net > > final oops: https://syzkaller.appspot.com/x/report.txt?x=117430fcd00000 > > console output: https://syzkaller.appspot.com/x/log.txt?x=167430fcd00000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=daeff30c2474a60f > > dashboard link: https://syzkaller.appspot.com/bug?extid=fbf4fc11a819824e027b > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13bfe45ed00000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1188e31ad00000 > > > > Reported-by: syzbot+fbf4fc11a819824e027b@xxxxxxxxxxxxxxxxxxxxxxxxx > > Fixes: 416dacb819f5 ("HID: hidraw: Fix invalid read in hidraw_ioctl") > > > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > > It seems likely that the bisection ran off the rails here. This commit > could not have caused a problem, although it may have revealed a > pre-existing problem that previously was hidden. Hi Alan, Yes, bisection log shows it was derailed by: KASAN: use-after-free Read in batadv_iv_ogm_queue_add and: BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! https://syzkaller.appspot.com/x/bisect.txt?x=127430fcd00000 > By the way, what happened to the annotated stack dumps that syzkaller > used to provide in its bug reports? Nothing has changed in this respect, they are still in bug reports: https://lore.kernel.org/lkml/00000000000073afff05bbe9a54d@xxxxxxxxxx/
