syzbot


WARNING in dst_release
Status: fixed on 2021/04/09 19:46
Reported-by: syzbot+b53bbea2ad64f9cf80d8@syzkaller.appspotmail.com
Fix commit: e0be4931f3fe mptcp: reset last_snd on subflow close
First crash: 295d, last: 295d

Cause bisection: introduced by (bisect log) :
commit 40947e13997a1cba4e875893ca6e5d5e61a0689d
Author: Florian Westphal <fw@strlen.de>
Date: Fri Feb 12 23:59:56 2021 +0000

  mptcp: schedule worker when subflow is closed

Crash: WARNING in dst_release (log)
Repro: syz .config
duplicates (2):
Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
KASAN: use-after-free Read in tcp_current_mss 1 298d 294d 0/22 closed as dup on 2021/02/17 18:42
KASAN: use-after-free Read in mptcp_established_options 10 294d 294d 0/22 closed as dup on 2021/02/17 18:39
Patch testing requests:
Created Duration User Patch Repo Result
2021/02/18 12:24 17m fw@strlen.de git://git.breakpoint.cc/fw/net-next.git 06690d5c6466b604f674477b522a809673c17eff OK

Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-net-kasan-gce 2021/02/16 15:02 net-next 9ec5eea5b6ac 98682e5e .config log report syz WARNING in dst_release
ci-upstream-net-kasan-gce 2021/02/16 13:34 net-next 9ec5eea5b6ac 98682e5e .config log report info WARNING in dst_release