From: syzbot <syzbot+fafb46da3f65fdbacd16@syzkaller.appspotmail.com>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: alex.aring@gmail.com, davem@davemloft.net, dvyukov@google.com,
kuba@kernel.org, linux-kernel@vger.kernel.org,
linux-wpan@vger.kernel.org, mudongliangabcd@gmail.com,
netdev@vger.kernel.org, stefan@datenfreihafen.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] general protection fault in hwsim_new_edge_nl
Date: Mon, 16 Aug 2021 02:44:54 -0700 [thread overview]
Message-ID: <000000000000af527b05c9aa0df9@google.com> (raw)
In-Reply-To: <CACT4Y+a-+AdKxsCnqPtE-0VRCO7CJjWmVQ0gmjZQ04YCcAHLsA@mail.gmail.com>
> On Mon, 9 Aug 2021 at 10:22, Dongliang Mu <mudongliangabcd@gmail.com> wrote:
>>
>> On Mon, Aug 9, 2021 at 3:54 PM syzbot
>> <syzbot+fafb46da3f65fdbacd16@syzkaller.appspotmail.com> wrote:
>> >
>> > Hello,
>> >
>> > syzbot found the following issue on:
>> >
>> > HEAD commit: c2eecaa193ff pktgen: Remove redundant clone_skb override
>> > git tree: net-next
>> > console output: https://syzkaller.appspot.com/x/log.txt?x=1226099a300000
>> > kernel config: https://syzkaller.appspot.com/x/.config?x=aba0c23f8230e048
>> > dashboard link: https://syzkaller.appspot.com/bug?extid=fafb46da3f65fdbacd16
>> > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1
>> >
>> > Unfortunately, I don't have any reproducer for this issue yet.
>> >
>> > IMPORTANT: if you fix the issue, please add the following tag to the commit:
>> > Reported-by: syzbot+fafb46da3f65fdbacd16@syzkaller.appspotmail.com
>> >
>> > general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
>> > KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
>>
>> Hi all,
>>
>> I think the crash can be fixed by [PATCH] ieee802154: hwsim: fix GPF
>> in hwsim_new_edge_nl [1]. For now, it is in the wpan tree.
>>
>> [1] https://lkml.org/lkml/2021/7/8/66
>
> Let's tell syzbot about the fix:
>
> #syz fx: ieee802154: hwsim: fix GPF in hwsim_new_edge_nl
unknown command "fx:"
>
>> > CPU: 1 PID: 1403 Comm: syz-executor.2 Not tainted 5.14.0-rc3-syzkaller #0
>> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
>> > RIP: 0010:nla_len include/net/netlink.h:1148 [inline]
>> > RIP: 0010:nla_parse_nested_deprecated include/net/netlink.h:1231 [inline]
>> > RIP: 0010:hwsim_new_edge_nl+0xf4/0x8c0 drivers/net/ieee802154/mac802154_hwsim.c:425
>> > Code: 00 0f 85 76 07 00 00 4d 85 ed 48 8b 5b 10 0f 84 5e 05 00 00 e8 0d f2 40 fc 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 87
>> > RSP: 0018:ffffc90009a47568 EFLAGS: 00010246
>> > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000dd59000
>> > RDX: 0000000000000000 RSI: ffffffff8534ab43 RDI: ffff88801c2b44d0
>> > RBP: ffffc90009a47678 R08: 0000000000000001 R09: ffffc90009a476a8
>> > R10: fffff52001348ed6 R11: 0000000000000000 R12: ffffc90009a47698
>> > R13: ffff888025945c14 R14: ffff888071f0cdc0 R15: 0000000000000000
>> > FS: 00007f8448923700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
>> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> > CR2: 00000000032f4708 CR3: 0000000033eed000 CR4: 00000000001506e0
>> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>> > Call Trace:
>> > genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731
>> > genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
>> > genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792
>> > netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
>> > genl_rcv+0x24/0x40 net/netlink/genetlink.c:803
>> > netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
>> > netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
>> > netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
>> > sock_sendmsg_nosec net/socket.c:704 [inline]
>> > sock_sendmsg+0xcf/0x120 net/socket.c:724
>> > ____sys_sendmsg+0x6e8/0x810 net/socket.c:2403
>> > ___sys_sendmsg+0xf3/0x170 net/socket.c:2457
>> > __sys_sendmsg+0xe5/0x1b0 net/socket.c:2486
>> > do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>> > do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>> > entry_SYSCALL_64_after_hwframe+0x44/0xae
>> > RIP: 0033:0x4665e9
>> > Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
>> > RSP: 002b:00007f8448923188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
>> > RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
>> > RDX: 0000000000000000 RSI: 0000000020001ac0 RDI: 0000000000000004
>> > RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
>> > R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
>> > R13: 00007ffd8ac8e60f R14: 00007f8448923300 R15: 0000000000022000
>> > Modules linked in:
>> > ---[ end trace d1679fe789931133 ]---
>> > RIP: 0010:nla_len include/net/netlink.h:1148 [inline]
>> > RIP: 0010:nla_parse_nested_deprecated include/net/netlink.h:1231 [inline]
>> > RIP: 0010:hwsim_new_edge_nl+0xf4/0x8c0 drivers/net/ieee802154/mac802154_hwsim.c:425
>> > Code: 00 0f 85 76 07 00 00 4d 85 ed 48 8b 5b 10 0f 84 5e 05 00 00 e8 0d f2 40 fc 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 87
>> > RSP: 0018:ffffc90009a47568 EFLAGS: 00010246
>> > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000dd59000
>> > RDX: 0000000000000000 RSI: ffffffff8534ab43 RDI: ffff88801c2b44d0
>> > RBP: ffffc90009a47678 R08: 0000000000000001 R09: ffffc90009a476a8
>> > R10: fffff52001348ed6 R11: 0000000000000000 R12: ffffc90009a47698
>> > R13: ffff888025945c14 R14: ffff888071f0cdc0 R15: 0000000000000000
>> > FS: 00007f8448923700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
>> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> > CR2: 000055bb2ea2f160 CR3: 0000000033eed000 CR4: 00000000001506f0
>> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>> >
>> >
>> > ---
>> > This report is generated by a bot. It may contain errors.
>> > See https://goo.gl/tpsmEJ for more information about syzbot.
>> > syzbot engineers can be reached at syzkaller@googlegroups.com.
>> >
>> > syzbot will keep track of this issue. See:
>> > https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
>> >
>> > --
>> > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group.
>> > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com.
>> > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/0000000000007faf7505c91bb19d%40google.com.
>>
>> --
>> You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group.
>> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com.
>> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/CAD-N9QULPO0jNkKr6VxtXb78TSzzFTJ9n%2Ba36h1vruO9q6nhSw%40mail.gmail.com.
next prev parent reply other threads:[~2021-08-16 9:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 7:54 [syzbot] general protection fault in hwsim_new_edge_nl syzbot
2021-08-09 8:22 ` Dongliang Mu
2021-08-16 9:44 ` Dmitry Vyukov
2021-08-16 9:44 ` syzbot [this message]
2021-08-16 9:49 ` Dmitry Vyukov
2021-08-10 5:41 ` syzbot
2021-08-10 15:34 ` syzbot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=000000000000af527b05c9aa0df9@google.com \
--to=syzbot+fafb46da3f65fdbacd16@syzkaller.appspotmail.com \
--cc=alex.aring@gmail.com \
--cc=davem@davemloft.net \
--cc=dvyukov@google.com \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-wpan@vger.kernel.org \
--cc=mudongliangabcd@gmail.com \
--cc=netdev@vger.kernel.org \
--cc=stefan@datenfreihafen.org \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.