linux-kernel - [syzbot] [wpan?] WARNING in lowpan

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Message-ID: <685b0ae5.a00a0220.2e5631.009a.GAE@google.com>
Date: Tue, 24 Jun 2025 13:30:29 -0700
From: syzbot <syzbot+5b74e0e96f12e3728ec8@...kaller.appspotmail.com>
To: alex.aring@...il.com, davem@...emloft.net, edumazet@...gle.com, 
	horms@...nel.org, kuba@...nel.org, linux-kernel@...r.kernel.org, 
	linux-wpan@...r.kernel.org, miquel.raynal@...tlin.com, netdev@...r.kernel.org, 
	pabeni@...hat.com, stefan@...enfreihafen.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [wpan?] WARNING in lowpan_xmit (2)

Hello,

syzbot found the following issue on:

HEAD commit:    4f4040ea5d3e net: ti: icssg-prueth: Add prp offload suppor..
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=11630dd4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fab0bcec5be1995b
dashboard link: https://syzkaller.appspot.com/bug?extid=5b74e0e96f12e3728ec8
compiler:       Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=170cd370580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/64e76754e788/disk-4f4040ea.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/58f25c6cca53/vmlinux-4f4040ea.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f700f89884c1/bzImage-4f4040ea.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5b74e0e96f12e3728ec8@...kaller.appspotmail.com

ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1302 at ./include/linux/skbuff.h:3157 skb_network_header_len include/linux/skbuff.h:3157 [inline]
WARNING: CPU: 1 PID: 1302 at ./include/linux/skbuff.h:3157 lowpan_header net/ieee802154/6lowpan/tx.c:236 [inline]
WARNING: CPU: 1 PID: 1302 at ./include/linux/skbuff.h:3157 lowpan_xmit+0xde9/0x1340 net/ieee802154/6lowpan/tx.c:282
Modules linked in:
CPU: 1 UID: 0 PID: 1302 Comm: aoe_tx0 Not tainted 6.16.0-rc2-syzkaller-00591-g4f4040ea5d3e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:skb_network_header_len include/linux/skbuff.h:3157 [inline]
RIP: 0010:lowpan_header net/ieee802154/6lowpan/tx.c:236 [inline]
RIP: 0010:lowpan_xmit+0xde9/0x1340 net/ieee802154/6lowpan/tx.c:282
Code: 48 85 c0 0f 84 38 02 00 00 49 89 c6 e8 00 77 a0 f6 e9 69 f5 ff ff e8 f6 76 a0 f6 90 0f 0b 90 e9 5c f6 ff ff e8 e8 76 a0 f6 90 <0f> 0b 90 e9 2c f7 ff ff e8 da 76 a0 f6 e9 12 fc ff ff 90 0f 0b 90
RSP: 0018:ffffc9000437f640 EFLAGS: 00010293
RAX: ffffffff8b1fe568 RBX: ffff8880312e6140 RCX: ffff888027989e00
RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff
RBP: ffffc9000437f830 R08: 0000000000000003 R09: 0000000000000000
R10: ffffc9000437f4f0 R11: fffff5200086fea4 R12: 1ffff1100625cc36
R13: 0000000000000020 R14: ffff8880312e6140 R15: 000000000000ffff
FS:  0000000000000000(0000) GS:ffff888125d4f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe947dbbf98 CR3: 000000007a4dc000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __netdev_start_xmit include/linux/netdevice.h:5225 [inline]
 netdev_start_xmit include/linux/netdevice.h:5234 [inline]
 xmit_one net/core/dev.c:3828 [inline]
 dev_hard_start_xmit+0x2d4/0x830 net/core/dev.c:3844
 __dev_queue_xmit+0x1adf/0x3a70 net/core/dev.c:4711
 dev_queue_xmit include/linux/netdevice.h:3365 [inline]
 tx+0x6b/0x190 drivers/block/aoe/aoenet.c:62
 kthread+0x1d0/0x3e0 drivers/block/aoe/aoecmd.c:1237
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>


---
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@...glegroups.com.

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If the report is already addressed, let syzbot know by replying with:
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If you want syzbot to run the reproducer, reply with:
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#syz undup