syzbot


KASAN: use-after-free Write in __alloc_skb (3)
Status: upstream: reported C repro on 2020/07/29 18:24
Reported-by: syzbot+7569bc4cd6fad9f1e551@syzkaller.appspotmail.com
First crash: 448d, last: 76d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: C syz .config

Fix bisection: the fix commit could be any of (bisect log):
  68845a55c31b Merge branch 'akpm' into master (patches from Andrew)
  9e9fb7655ed5 Merge tag 'net-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
similar bugs (5):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 KASAN: use-after-free Write in __alloc_skb C done 2 643d 711d 1/1 fixed on 2020/02/11 15:16
upstream KASAN: use-after-free Write in __alloc_skb (2) C done 7 657d 674d 16/22 fixed on 2020/02/18 14:31
linux-4.14 KASAN: use-after-free Write in __alloc_skb (2) C 1 24d 450d 0/1 upstream: reported C repro on 2020/07/24 01:04
upstream KASAN: use-after-free Write in __alloc_skb 2 698d 704d 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 643d 673d 1/1 fixed on 2020/02/14 21:56
Patch testing requests:
Created Duration User Patch Repo Result
2021/04/15 14:15 12m alaaemadhossney.ae@gmail.com upstream report log
2020/08/29 06:31 11m brookebasile@gmail.com upstream report log

Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2020/07/25 18:21 upstream 68845a55c31b 1f7cc1ca .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/07/27 08:23 linux-next 26027945c94a 51265195 .config log report syz C