syzbot


WARNING in lowpan_xmit (2)

Status: upstream: reported syz repro on 2025/06/24 20:30
Subsystems: wpan
[Documentation on labels]
Reported-by: syzbot+5b74e0e96f12e3728ec8@syzkaller.appspotmail.com
First crash: 70d, last: 21d
Cause bisection: failed (error log, bisect log)
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [wpan?] WARNING in lowpan_xmit (2) 0 (1) 2025/06/24 20:30
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in lowpan_xmit wpan -1 2 351d 441d 0/29 auto-obsoleted due to no activity on 2024/12/22 09:15
Last patch testing requests (1)
Created Duration User Patch Repo Result
2025/07/04 23:20 25m retest repro net-next OK log

Sample crash report:
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1305 at ./include/linux/skbuff.h:3180 skb_network_header_len include/linux/skbuff.h:3180 [inline]
WARNING: CPU: 1 PID: 1305 at ./include/linux/skbuff.h:3180 lowpan_header net/ieee802154/6lowpan/tx.c:236 [inline]
WARNING: CPU: 1 PID: 1305 at ./include/linux/skbuff.h:3180 lowpan_xmit+0xde9/0x1340 net/ieee802154/6lowpan/tx.c:282
Modules linked in:
CPU: 1 UID: 0 PID: 1305 Comm: aoe_tx0 Not tainted 6.16.0-syzkaller-12063-g37816488247d #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:skb_network_header_len include/linux/skbuff.h:3180 [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 c0 ab 8d f6 e9 69 f5 ff ff e8 b6 ab 8d f6 90 0f 0b 90 e9 5c f6 ff ff e8 a8 ab 8d f6 90 <0f> 0b 90 e9 2c f7 ff ff e8 9a ab 8d f6 e9 12 fc ff ff 90 0f 0b 90
RSP: 0018:ffffc90004197480 EFLAGS: 00010293
RAX: ffffffff8b320008 RBX: ffff88801e2bdc80 RCX: ffff888027098000
RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff
RBP: ffffc90004197670 R08: 0000000000000003 R09: 0000000000000000
R10: ffffc90004197330 R11: fffff52000832e6c R12: 1ffff11003c57b9e
R13: 0000000000000020 R14: ffff88801e2bdc80 R15: 000000000000ffff
FS:  0000000000000000(0000) GS:ffff888125d21000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa7e5ae56c0 CR3: 000000007c3e4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __netdev_start_xmit include/linux/netdevice.h:5219 [inline]
 netdev_start_xmit include/linux/netdevice.h:5228 [inline]
 xmit_one net/core/dev.c:3827 [inline]
 dev_hard_start_xmit+0x2d7/0x830 net/core/dev.c:3843
 sch_direct_xmit+0x241/0x4b0 net/sched/sch_generic.c:344
 qdisc_restart net/sched/sch_generic.c:409 [inline]
 __qdisc_run+0xb16/0x15f0 net/sched/sch_generic.c:417
 __dev_xmit_skb net/core/dev.c:4171 [inline]
 __dev_queue_xmit+0x1056/0x3b50 net/core/dev.c:4679
 dev_queue_xmit include/linux/netdevice.h:3358 [inline]
 tx+0x6b/0x190 drivers/block/aoe/aoenet.c:62
 kthread+0x1cd/0x3e0 drivers/block/aoe/aoecmd.c:1241
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/08 19:08 net-next 37816488247d 987b750d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in lowpan_xmit
2025/06/20 23:05 net-next 4f4040ea5d3e e3003213 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in lowpan_xmit
2025/06/20 20:23 net-next 4f4040ea5d3e e3003213 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in lowpan_xmit
* Struck through repros no longer work on HEAD.