syzbot has bisected this issue to:
commit e7096c131e5161fa3b8e52a650d7719d2857adfd Author: Jason A. Donenfeld Jason@zx2c4.com Date: Sun Dec 8 23:27:34 2019 +0000
net: WireGuard secure network tunnel
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=175ad8b1900000 start commit: e3ec1e8c net: eliminate meaningless memcpy to data in pskb.. git tree: net-next final oops: https://syzkaller.appspot.com/x/report.txt?x=14dad8b1900000 console output: https://syzkaller.appspot.com/x/log.txt?x=10dad8b1900000 kernel config: https://syzkaller.appspot.com/x/.config?x=3d400a47d1416652 dashboard link: https://syzkaller.appspot.com/bug?extid=cc4c0f394e2611edba66 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d9de91900000
Reported-by: syzbot+cc4c0f394e2611edba66@syzkaller.appspotmail.com Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
On Wed, Aug 19, 2020 at 8:42 PM syzbot syzbot+cc4c0f394e2611edba66@syzkaller.appspotmail.com wrote:
syzbot has bisected this issue to:
commit e7096c131e5161fa3b8e52a650d7719d2857adfd Author: Jason A. Donenfeld Jason@zx2c4.com Date: Sun Dec 8 23:27:34 2019 +0000
net: WireGuard secure network tunnelbisection log: https://syzkaller.appspot.com/x/bisect.txt?x=175ad8b1900000 start commit: e3ec1e8c net: eliminate meaningless memcpy to data in pskb.. git tree: net-next final oops: https://syzkaller.appspot.com/x/report.txt?x=14dad8b1900000 console output: https://syzkaller.appspot.com/x/log.txt?x=10dad8b1900000 kernel config: https://syzkaller.appspot.com/x/.config?x=3d400a47d1416652 dashboard link: https://syzkaller.appspot.com/bug?extid=cc4c0f394e2611edba66 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d9de91900000
Reported-by: syzbot+cc4c0f394e2611edba66@syzkaller.appspotmail.com Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Having trouble linking this back to wireguard... Those oopses don't have anything to do with it either. Bisection error?
On Thu, 2020-08-20 at 11:47 +0200, Jason A. Donenfeld wrote:
On Wed, Aug 19, 2020 at 8:42 PM syzbot syzbot+cc4c0f394e2611edba66@syzkaller.appspotmail.com wrote:
syzbot has bisected this issue to:
commit e7096c131e5161fa3b8e52a650d7719d2857adfd Author: Jason A. Donenfeld Jason@zx2c4.com Date: Sun Dec 8 23:27:34 2019 +0000
net: WireGuard secure network tunnelbisection log: https://syzkaller.appspot.com/x/bisect.txt?x=175ad8b1900000 start commit: e3ec1e8c net: eliminate meaningless memcpy to data in pskb.. git tree: net-next final oops: https://syzkaller.appspot.com/x/report.txt?x=14dad8b1900000 console output: https://syzkaller.appspot.com/x/log.txt?x=10dad8b1900000 kernel config: https://syzkaller.appspot.com/x/.config?x=3d400a47d1416652 dashboard link: https://syzkaller.appspot.com/bug?extid=cc4c0f394e2611edba66 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d9de91900000
Reported-by: syzbot+cc4c0f394e2611edba66@syzkaller.appspotmail.com Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Having trouble linking this back to wireguard... Those oopses don't have anything to do with it either. Bisection error?
Probably the typical generic netlink issue - syzbot often hits the generic netlink family by ID, rather than by name. So when it has a kernel without WG a generic netlink family disappears, the later ones get different IDs, and the issue no longer happens since the ID is now no longer valid or hitting some completely different code path ...
johannes
On Thu, Aug 20, 2020 at 11:48 AM Jason A. Donenfeld Jason@zx2c4.com wrote:
On Wed, Aug 19, 2020 at 8:42 PM syzbot syzbot+cc4c0f394e2611edba66@syzkaller.appspotmail.com wrote:
syzbot has bisected this issue to:
commit e7096c131e5161fa3b8e52a650d7719d2857adfd Author: Jason A. Donenfeld Jason@zx2c4.com Date: Sun Dec 8 23:27:34 2019 +0000
net: WireGuard secure network tunnelbisection log: https://syzkaller.appspot.com/x/bisect.txt?x=175ad8b1900000 start commit: e3ec1e8c net: eliminate meaningless memcpy to data in pskb.. git tree: net-next final oops: https://syzkaller.appspot.com/x/report.txt?x=14dad8b1900000 console output: https://syzkaller.appspot.com/x/log.txt?x=10dad8b1900000 kernel config: https://syzkaller.appspot.com/x/.config?x=3d400a47d1416652 dashboard link: https://syzkaller.appspot.com/bug?extid=cc4c0f394e2611edba66 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d9de91900000
Reported-by: syzbot+cc4c0f394e2611edba66@syzkaller.appspotmail.com Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Having trouble linking this back to wireguard... Those oopses don't have anything to do with it either. Bisection error?
I don't see anything obviously wrong in the bisection log: bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=175ad8b1900000
On the other hand, it looks super precise. It tracked "WARNING in __cfg80211_connect_result" all the way down to the wireguard commit with no flakes or anything.
linux-kselftest-mirror@lists.linaro.org
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Dmitry Vyukov -
Jason A. Donenfeld -
Johannes Berg -
syzbot