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kernel BUG in ip6gre_header (3)

Status: closed as invalid on 2024/03/01 17:31
Subsystems: net
[Documentation on labels]
First crash: 108d, last: 108d
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 kernel BUG at net/core/skbuff.c:LINE! C unreliable 494 634d 1854d 0/1 upstream: reported C repro on 2019/04/27 20:12
upstream kernel BUG in ip6gre_header (2) net C 2 224d 238d 25/26 fixed on 2024/01/20 21:18
upstream kernel BUG in ip6gre_header net C 5 275d 345d 23/26 fixed on 2023/09/28 17:51
upstream kernel BUG in llc_sap_action_send_xid_c net C error 61 927d 1141d 20/26 fixed on 2021/11/10 00:50
upstream kernel BUG in pskb_expand_head net C done 1600 470d 921d 22/26 fixed on 2023/02/25 08:02
linux-6.1 kernel BUG in ip6gre_header origin:upstream C 1 4d08h 345d 0/3 upstream: reported C repro on 2023/06/14 11:11

Sample crash report:
skbuff: skb_under_panic: text:ffffffff8a336628 len:120 put:44 head:ffff88808b097000 data:ffff88808b096fe4 tail:0x5c end:0x6c0 dev:macvtap1
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:193!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.8.0-rc3-next-20240205-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: mld mld_ifc_work
RIP: 0010:skb_panic net/core/skbuff.c:193 [inline]
RIP: 0010:skb_under_panic+0x14b/0x150 net/core/skbuff.c:203
Code: 9f 8c 48 c7 c6 b6 01 a7 8d 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 41 54 41 57 41 56 e8 0a 58 2b 02 48 83 c4 20 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3
RSP: 0018:ffffc900001e73b8 EFLAGS: 00010286
RAX: 000000000000008a RBX: dffffc0000000000 RCX: 6ac08c8247a5b600
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff88802388bb50 R08: ffffffff8175b58c R09: 1ffff110172a51a2
R10: dffffc0000000000 R11: ffffed10172a51a3 R12: 00000000000006c0
R13: ffff88808b097000 R14: ffff88808b096fe4 R15: 000000000000005c
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f6ddcc048 CR3: 000000007dd16000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 skb_push+0xe5/0x100 net/core/skbuff.c:2489
 ip6gre_header+0xc8/0x950 net/ipv6/ip6_gre.c:1384
 dev_hard_header include/linux/netdevice.h:3225 [inline]
 vlan_dev_hard_header+0x359/0x480 net/8021q/vlan_dev.c:83
 dev_hard_header include/linux/netdevice.h:3225 [inline]
 neigh_resolve_output+0x4de/0x720 net/core/neighbour.c:1558
 neigh_output include/net/neighbour.h:542 [inline]
 ip6_finish_output2+0xfed/0x1660 net/ipv6/ip6_output.c:137
 ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:222
 NF_HOOK+0x9e/0x430 include/linux/netfilter.h:314
 mld_sendpack+0x838/0xda0 net/ipv6/mcast.c:1818
 mld_send_cr net/ipv6/mcast.c:2119 [inline]
 mld_ifc_work+0x807/0xb30 net/ipv6/mcast.c:2650
 process_one_work kernel/workqueue.c:3102 [inline]
 process_scheduled_works+0x9d7/0x1730 kernel/workqueue.c:3182
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3263
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_panic net/core/skbuff.c:193 [inline]
RIP: 0010:skb_under_panic+0x14b/0x150 net/core/skbuff.c:203
Code: 9f 8c 48 c7 c6 b6 01 a7 8d 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 41 54 41 57 41 56 e8 0a 58 2b 02 48 83 c4 20 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3
RSP: 0018:ffffc900001e73b8 EFLAGS: 00010286
RAX: 000000000000008a RBX: dffffc0000000000 RCX: 6ac08c8247a5b600
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff88802388bb50 R08: ffffffff8175b58c R09: 1ffff110172a51a2
R10: dffffc0000000000 R11: ffffed10172a51a3 R12: 00000000000006c0
R13: ffff88808b097000 R14: ffff88808b096fe4 R15: 000000000000005c
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f83e15ff000 CR3: 000000007dd16000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/02/06 03:10 linux-next 23e11d031852 4e988e80 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in ip6gre_header
* Struck through repros no longer work on HEAD.