syzbot


kernel BUG in net_dm_packet_work

Status: auto-obsoleted due to no activity on 2026/04/19 06:56
Subsystems: net
[Documentation on labels]
First crash: 103d, last: 103d
✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
eca81a9f-3c88-460c-9c0d-d32db5c54fdf repro kernel BUG in net_dm_packet_work 2026/03/06 17:46 2026/03/06 17:46 2026/03/06 17:58 31e9c887f7dc24e04b3ca70d0d54fc34141844b0

Sample crash report:
------------[ cut here ]------------
kernel BUG at ./include/linux/skbuff.h:2832!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 16794 Comm: kworker/1:9 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events net_dm_packet_work
RIP: 0010:__skb_pull include/linux/skbuff.h:2832 [inline]
RIP: 0010:skb_pull_inline include/linux/skbuff.h:2839 [inline]
RIP: 0010:skb_pull+0x1cc/0x1d0 net/core/skbuff.c:2658
Code: 17 f6 f8 8b 44 24 0c 89 43 70 48 c7 c7 a0 9e 6f 8c 89 ee e8 76 a6 f6 f7 48 c7 c7 e0 9e 6f 8c 48 89 de 31 d2 e8 35 0e ff ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f
RSP: 0000:ffffc900023ef7f8 EFLAGS: 00010296
RAX: ffffffff89302214 RBX: ffff888031bf1c80 RCX: ffff88802741bd00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000000ea R08: ffffffff8f822a77 R09: 1ffffffff1f0454e
R10: dffffc0000000000 R11: fffffbfff1f0454f R12: 0000000000000af8
R13: dffffc0000000000 R14: 1ffff1100637e39e R15: 0000000000000a0e
FS:  0000000000000000(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000009038 CR3: 0000000036594000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 net_dm_packet_report net/core/drop_monitor.c:703 [inline]
 net_dm_packet_work+0x4da/0x1450 net/core/drop_monitor.c:742
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__skb_pull include/linux/skbuff.h:2832 [inline]
RIP: 0010:skb_pull_inline include/linux/skbuff.h:2839 [inline]
RIP: 0010:skb_pull+0x1cc/0x1d0 net/core/skbuff.c:2658
Code: 17 f6 f8 8b 44 24 0c 89 43 70 48 c7 c7 a0 9e 6f 8c 89 ee e8 76 a6 f6 f7 48 c7 c7 e0 9e 6f 8c 48 89 de 31 d2 e8 35 0e ff ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f
RSP: 0000:ffffc900023ef7f8 EFLAGS: 00010296
RAX: ffffffff89302214 RBX: ffff888031bf1c80 RCX: ffff88802741bd00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000000ea R08: ffffffff8f822a77 R09: 1ffffffff1f0454e
R10: dffffc0000000000 R11: fffffbfff1f0454f R12: 0000000000000af8
R13: dffffc0000000000 R14: 1ffff1100637e39e R15: 0000000000000a0e
FS:  0000000000000000(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b3cbb7198 CR3: 000000004a71e000 CR4: 00000000003526f0

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/11 05:28 net cac2c363c41c d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce kernel BUG in net_dm_packet_work
* Struck through repros no longer work on HEAD.