syzbot


KASAN: use-after-free Read in afs_deactivate_cell (2)
Status: upstream: reported C repro on 2020/09/21 10:33
Reported-by: syzbot+a5e4946b04d6ca8fa5f3@syzkaller.appspotmail.com
Fix commit: 1d0e850a afs: Fix cell removal
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386]
First crash: 36d, last: 17d

Cause bisection: introduced by (bisect log) :
commit 13fcc6837049f1bd76d57e9abc217a91fdbad764
Author: David Howells <dhowells@redhat.com>
Date: Thu Nov 1 23:07:27 2018 +0000

  afs: Add fs_context support

Crash: KASAN: use-after-free Read in __d_alloc (log)
Repro: C syz .config
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: use-after-free Read in afs_deactivate_cell 1 242d 239d 0/17 auto-closed as invalid on 2020/04/27 10:28

Sample crash report:

Crashes (11):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Maintainers
ci-upstream-linux-next-kasan-gce-root 2020/09/30 08:24 linux-next 49e7e3e9 5abc3f1a .config log report syz C dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org
ci-upstream-kasan-gce-selinux-root 2020/10/09 12:08 upstream 583090b1 92390980 .config log report info dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org
ci-upstream-kasan-gce-root 2020/09/26 15:55 upstream 7c7ec322 2d5ea0cb .config log report info dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org
ci-upstream-kasan-gce-root 2020/09/25 02:18 upstream 171d4ff7 54289b08 .config log report info dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org
ci-upstream-kasan-gce-selinux-root 2020/09/24 07:16 upstream c9c9e6a4 54289b08 .config log report info dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org
ci-upstream-kasan-gce-root 2020/09/22 15:19 upstream 98477740 3e8f6c27 .config log report info dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org
ci-upstream-kasan-gce-selinux-root 2020/09/20 12:59 upstream 325d0eab 53ce8104 .config log report info dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org
ci-upstream-kasan-gce-386 2020/10/05 04:54 upstream 549738f1 5ef9c291 .config log report info dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org
ci-qemu-upstream-386 2020/09/22 12:24 upstream 98477740 3e8f6c27 .config log report info dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root 2020/09/22 16:10 linux-next e6499702 3e8f6c27 .config log report info dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root 2020/09/22 15:33 linux-next e6499702 3e8f6c27 .config log report info dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org