syzbot


KASAN: use-after-free Read in l3mdev_master_ifindex_rcu
Status: fixed on 2020/04/15 17:19
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: e08ad80551b4 net: add strict checks in netdev_name_node_alt_destroy()
First crash: 654d, last: 648d

Cause bisection: introduced by (bisect log) :
commit 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc
Author: Jiri Pirko <jiri@mellanox.com>
Date: Mon Sep 30 09:48:16 2019 +0000

  net: rtnetlink: add linkprop commands to add and delete alternative ifnames

Crash: KASAN: use-after-free Read in l3mdev_master_ifindex_rcu (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log) :
commit e08ad80551b4b33c02f2fce1522f6c227d3976cf
Author: Eric Dumazet <edumazet@google.com>
Date: Fri Feb 14 15:53:53 2020 +0000

  net: add strict checks in netdev_name_node_alt_destroy()


Sample crash report:

Crashes (13):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2020/02/16 15:59 upstream db70e26e33ee cf914200 .config log report syz C
ci-upstream-kasan-gce-smack-root 2020/02/16 15:23 upstream db70e26e33ee cf914200 .config log report syz C
ci-upstream-kasan-gce-root 2020/02/15 09:29 upstream 2019fc96af22 5d7b90f1 .config log report syz C
ci-upstream-kasan-gce-smack-root 2020/02/14 03:03 upstream 0bf999f9c5e7 c5ed587f .config log report syz C
ci-upstream-kasan-gce 2020/02/14 02:33 upstream 0bf999f9c5e7 c5ed587f .config log report syz C
ci-upstream-kasan-gce-386 2020/02/16 21:15 upstream db70e26e33ee cf914200 .config log report syz C
ci-upstream-net-this-kasan-gce 2020/02/14 03:05 net 6ee2deb6fbed c5ed587f .config log report syz C
ci-upstream-net-kasan-gce 2020/02/14 03:06 net-next fdfa3a6778b1 c5ed587f .config log report syz C
ci-upstream-kasan-gce-386 2020/02/16 17:05 upstream db70e26e33ee cf914200 .config log report syz
ci-upstream-kasan-gce-selinux-root 2020/02/19 17:54 upstream 0a44cac81050 b690a6e3 .config log report
ci-upstream-kasan-gce 2020/02/16 09:23 upstream db70e26e33ee 5d7b90f1 .config log report
ci-upstream-kasan-gce-selinux-root 2020/02/15 18:38 upstream 2019fc96af22 5d7b90f1 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/02/16 02:51 linux-next 9f01828e9e16 5d7b90f1 .config log report