syzbot

skbuff: skb_over_panic: text:ffffffff8615b76f len:20 put:20 head:0000000000000000 data:0000000000000000 tail:0x14 end:0x0 dev:<NULL>
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kernel BUG at net/core/skbuff.c:122!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 26 Comm: kworker/1:1 Not tainted 6.2.0-rc6-next-20230203-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:skb_panic+0x152/0x1d0 net/core/skbuff.c:122
Code: 0f b6 04 01 84 c0 74 04 3c 03 7e 20 8b 4b 70 41 56 45 89 e8 48 c7 c7 40 11 5c 8b 41 57 56 48 89 ee 52 4c 89 e2 e8 de 43 5e f9 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 a9 66 c9 f9 4c
RSP: 0018:ffffc90000a1fbc0 EFLAGS: 00010286
RAX: 0000000000000084 RBX: ffff88802b3e6500 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8168dfbc RDI: 0000000000000005
RBP: ffffffff8b5c1f80 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000001 R11: 0000000000000000 R12: ffffffff8615b76f
R13: 0000000000000014 R14: ffffffff8b5c1100 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdf942b0150 CR3: 000000007a8e3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 skb_over_panic net/core/skbuff.c:127 [inline]
 skb_put+0x16f/0x1a0 net/core/skbuff.c:2261
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:764 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline]
 nsim_dev_trap_report_work+0x4df/0xc80 drivers/net/netdevsim/dev.c:853
 process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390
 worker_thread+0x669/0x1090 kernel/workqueue.c:2537
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_panic+0x152/0x1d0 net/core/skbuff.c:122
Code: 0f b6 04 01 84 c0 74 04 3c 03 7e 20 8b 4b 70 41 56 45 89 e8 48 c7 c7 40 11 5c 8b 41 57 56 48 89 ee 52 4c 89 e2 e8 de 43 5e f9 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 a9 66 c9 f9 4c
RSP: 0018:ffffc90000a1fbc0 EFLAGS: 00010286
RAX: 0000000000000084 RBX: ffff88802b3e6500 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8168dfbc RDI: 0000000000000005
RBP: ffffffff8b5c1f80 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000001 R11: 0000000000000000 R12: ffffffff8615b76f
R13: 0000000000000014 R14: ffffffff8b5c1100 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdf942b0150 CR3: 000000007a8e3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400