syzbot


KASAN: use-after-free Write in __alloc_skb
Status: fixed on 2020/02/11 15:16
Reported-by: syzbot+1eb0ac3e1381b5a0a6bf@syzkaller.appspotmail.com
Fix commit: be1a2be7a7b0 net: rtnetlink: validate IFLA_MTU attribute in rtnl_create_link()
First crash: 688d, last: 620d

Fix bisection: fixed by (bisect log) :
commit be1a2be7a7b0ed5a758fd8decc39386ba3b5d556
Author: Eric Dumazet <edumazet@google.com>
Date: Wed Jan 22 06:47:29 2020 +0000

  net: rtnetlink: validate IFLA_MTU attribute in rtnl_create_link()

similar bugs (5):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: use-after-free Write in __alloc_skb (3) C done inconclusive 2 53d 421d 0/22 upstream: reported C repro on 2020/07/29 18:24
upstream KASAN: use-after-free Write in __alloc_skb (2) C done 7 634d 650d 16/22 fixed on 2020/02/18 14:31
linux-4.14 KASAN: use-after-free Write in __alloc_skb (2) C 1 1d20h 427d 0/1 upstream: reported C repro on 2020/07/24 01:04
upstream KASAN: use-after-free Write in __alloc_skb 2 675d 681d 0/22 closed as invalid on 2019/12/08 05:44
linux-4.14 KASAN: use-after-free Write in __alloc_skb C done 1 620d 650d 1/1 fixed on 2020/02/14 21:56

Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-19 2019/12/13 09:52 linux-4.19.y 312017a460d5 2a752b7c .config log report syz C
ci2-linux-4-19 2019/11/05 11:01 linux-4.19.y ef244c308885 76630fc9 .config log report