[syzbot] general protection fault in hwsim_new_edge_nl

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syzbot

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Aug 9, 2021, 3:54:23 AM8/9/21
to alex....@gmail.com, da...@davemloft.net, ku...@kernel.org, linux-...@vger.kernel.org, linux...@vger.kernel.org, net...@vger.kernel.org, ste...@datenfreihafen.org, syzkall...@googlegroups.com
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+fafb46...@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]
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 syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

Dongliang Mu

unread,
Aug 9, 2021, 4:22:33 AM8/9/21
to syzbot, Alexander Aring, David S. Miller, Jakub Kicinski, linux-kernel, linux-wpan - ML, open list:NETWORKING [GENERAL], Stefan Schmidt, syzkaller-bugs
On Mon, Aug 9, 2021 at 3:54 PM syzbot
<syzbot+fafb46...@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+fafb46...@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
> --
> 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-bug...@googlegroups.com.
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syzbot

unread,
Aug 10, 2021, 1:41:29 AM8/10/21
to alex....@gmail.com, da...@davemloft.net, ku...@kernel.org, linux-...@vger.kernel.org, linux...@vger.kernel.org, mudongl...@gmail.com, net...@vger.kernel.org, ste...@datenfreihafen.org, syzkall...@googlegroups.com
syzbot has found a reproducer for the following issue on:

HEAD commit: 2a2b6e3640c4 devlink: Fix port_type_set function pointer c..
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=11abd8a1300000
kernel config: https://syzkaller.appspot.com/x/.config?x=8075b2614f3db143
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
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13371f79300000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16fabc4a300000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+fafb46...@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]
CPU: 1 PID: 8442 Comm: syz-executor760 Not tainted 5.14.0-rc4-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 e3 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:ffffc9000178f568 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8534cab3 RDI: ffff88801dd72a10
RBP: ffffc9000178f678 R08: 0000000000000001 R09: ffffc9000178f6a8
R10: fffff520002f1ed6 R11: 0000000000000000 R12: ffffc9000178f698
R13: ffff888025fbd014 R14: ffff8880278afb40 R15: 0000000000000000
FS: 00000000013a1300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000744 CR3: 0000000031221000 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: 0033:0x43ef39
Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff22c3c298 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ef39
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 0000000000402f20 R08: 0000000000000000 R09: 0000000000400488
R10: 00000000004ac018 R11: 0000000000000246 R12: 0000000000402fb0
R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488
Modules linked in:
---[ end trace 63fa4e15cfb16ac5 ]---
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 e3 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:ffffc9000178f568 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8534cab3 RDI: ffff88801dd72a10
RBP: ffffc9000178f678 R08: 0000000000000001 R09: ffffc9000178f6a8
R10: fffff520002f1ed6 R11: 0000000000000000 R12: ffffc9000178f698
R13: ffff888025fbd014 R14: ffff8880278afb40 R15: 0000000000000000
FS: 00000000013a1300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000744 CR3: 0000000031221000 CR4: 00000000001506e0

syzbot

unread,
Aug 10, 2021, 11:34:14 AM8/10/21
to ak...@linux-foundation.org, alex....@gmail.com, b...@alien8.de, da...@davemloft.net, fred...@kernel.org, h...@zytor.com, jmat...@google.com, jo...@8bytes.org, ku...@kernel.org, k...@vger.kernel.org, linux-...@vger.kernel.org, linux...@vger.kernel.org, mark.r...@arm.com, masa...@kernel.org, mi...@redhat.com, mudongl...@gmail.com, net...@vger.kernel.org, npi...@gmail.com, pbon...@redhat.com, pet...@infradead.org, rafael.j...@intel.com, ros...@goodmis.org, sea...@google.com, sedat...@gmail.com, ste...@datenfreihafen.org, syzkall...@googlegroups.com, tg...@linutronix.de, vi...@massaru.org, vkuz...@redhat.com, wanp...@tencent.com, wi...@kernel.org, x...@kernel.org
syzbot has bisected this issue to:

commit 997acaf6b4b59c6a9c259740312a69ea549cc684
Author: Mark Rutland <mark.r...@arm.com>
Date: Mon Jan 11 15:37:07 2021 +0000

lockdep: report broken irq restoration

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13927981300000
start commit: d09c548dbf3b net: sched: act_mirred: Reset ct info when mi..
git tree: net
final oops: https://syzkaller.appspot.com/x/report.txt?x=10527981300000
console output: https://syzkaller.appspot.com/x/log.txt?x=17927981300000
kernel config: https://syzkaller.appspot.com/x/.config?x=343fd21f6f4da2d6
dashboard link: https://syzkaller.appspot.com/bug?extid=fafb46da3f65fdbacd16
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=152ee39e300000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15946ff1300000

Reported-by: syzbot+fafb46...@syzkaller.appspotmail.com
Fixes: 997acaf6b4b5 ("lockdep: report broken irq restoration")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection

syzbot

unread,
Aug 10, 2021, 10:16:08 PM8/10/21
to ay...@disroot.org, syzkall...@googlegroups.com
Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+fafb46...@syzkaller.appspotmail.com

Tested on:

commit: 1090340f net: Fix memory leak in ieee802154_raw_deliver
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan.git master
kernel config: https://syzkaller.appspot.com/x/.config?x=8b0748e662652166
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

Note: testing is done by a robot and is best-effort only.

syzbot

unread,
Aug 16, 2021, 5:44:55 AM8/16/21
to Dmitry Vyukov, alex....@gmail.com, da...@davemloft.net, dvy...@google.com, ku...@kernel.org, linux-...@vger.kernel.org, linux...@vger.kernel.org, mudongl...@gmail.com, net...@vger.kernel.org, ste...@datenfreihafen.org, syzkall...@googlegroups.com
> On Mon, 9 Aug 2021 at 10:22, Dongliang Mu <mudongl...@gmail.com> wrote:
>>
>> On Mon, Aug 9, 2021 at 3:54 PM syzbot
>> <syzbot+fafb46...@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+fafb46...@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 syzk...@googlegroups.com.
>> >
>> > syzbot will keep track of this issue. See:
>> > https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
>> >
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Dmitry Vyukov

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Aug 16, 2021, 5:44:55 AM8/16/21
to Dongliang Mu, syzbot, Alexander Aring, David S. Miller, Jakub Kicinski, linux-kernel, linux-wpan - ML, open list:NETWORKING [GENERAL], Stefan Schmidt, syzkaller-bugs
On Mon, 9 Aug 2021 at 10:22, Dongliang Mu <mudongl...@gmail.com> wrote:
>
> On Mon, Aug 9, 2021 at 3:54 PM syzbot
> <syzbot+fafb46...@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+fafb46...@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
> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/CAD-N9QULPO0jNkKr6VxtXb78TSzzFTJ9n%2Ba36h1vruO9q6nhSw%40mail.gmail.com.

Dmitry Vyukov

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Aug 16, 2021, 5:49:15 AM8/16/21
to syzbot, alex....@gmail.com, da...@davemloft.net, ku...@kernel.org, linux-...@vger.kernel.org, linux...@vger.kernel.org, mudongl...@gmail.com, net...@vger.kernel.org, ste...@datenfreihafen.org, syzkall...@googlegroups.com
#syz fix: ieee802154: hwsim: fix GPF in hwsim_new_edge_nl

syzbot

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Sep 15, 2022, 4:57:29 AM9/15/22
to syzkall...@googlegroups.com
Auto-closing this bug as obsolete.
No recent activity, existing reproducers are no longer triggering the issue.
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