syzbot


panic: text:ADDR len:LINE put:LINE head:ADDR data:ADDR tail:LINExc8 end:LINExc0 dev:ip6tnl0

Status: auto-closed as invalid on 2020/03/06 02:37
Reported-by: syzbot+71faf076c8ded2b8234d@syzkaller.appspotmail.com
First crash: 1683d, last: 1683d

Sample crash report:
IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready
skbuff: skb_over_panic: text:000000002bd52566 len:56 put:8 head:000000007e76b653 data:00000000b0aa2b74 tail:0xc8 end:0xc0 dev:ip6tnl0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 0 PID: 28845 Comm: kworker/0:0 Not tainted 4.14.152+ #0
Workqueue: ipv6_addrconf addrconf_dad_work
task: 0000000074fb8c9e task.stack: 000000008ae73434
RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:104
RSP: 0018:ffff888196527868 EFLAGS: 00010286
RAX: 0000000000000085 RBX: ffff8881c5dc33c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffffabc6a080 RDI: ffffed1032ca4eff
RBP: ffffffffabe89c20 R08: 0000000000000085 R09: ffffed103ae84ce9
R10: ffffed103ae84ce8 R11: ffff8881d7426747 R12: ffffffffab58480e
R13: 0000000000000008 R14: ffff888198340000 R15: 00000000000000c0
FS:  0000000000000000(0000) GS:ffff8881d7400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdefc38c6d4 CR3: 0000000205226003 CR4: 00000000001606b0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 skb_over_panic net/core/skbuff.c:109 [inline]
 skb_put.cold+0x24/0x24 net/core/skbuff.c:1699
 mld_newpack+0x4ce/0x7a0 net/ipv6/mcast.c:1608
 add_grhead.isra.0+0x29c/0x370 net/ipv6/mcast.c:1691
 add_grec+0x6a3/0xf10 net/ipv6/mcast.c:1822
 mld_send_initial_cr.part.0+0xb1/0x140 net/ipv6/mcast.c:2072
 mld_send_initial_cr net/ipv6/mcast.c:2090 [inline]
 ipv6_mc_dad_complete+0x163/0x1b0 net/ipv6/mcast.c:2084
 addrconf_dad_completed+0x7eb/0xad0 net/ipv6/addrconf.c:4079
 addrconf_dad_begin net/ipv6/addrconf.c:3867 [inline]
 addrconf_dad_work+0x99e/0x1170 net/ipv6/addrconf.c:3969
 process_one_work+0x7f1/0x1580 kernel/workqueue.c:2134
 worker_thread+0xdd/0xdf0 kernel/workqueue.c:2271
 kthread+0x31f/0x430 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404
Code: 20 ff 4c 8b 4c 24 10 8b 4b 78 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 40 96 e8 ab ff 74 24 10 ff 74 24 20 e8 39 b7 ee fe <0f> 0b e8 d7 91 fd fe 4c 8b 64 24 18 e8 fd 54 20 ff 48 c7 c1 e0 
RIP: skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: ffff888196527868
---[ end trace 3270e63f39aeccfa ]---

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/11/07 02:36 android-4.14 f7fedd5c15c1 da505f84 .config console log report ci-android-414-kasan-gce-root
2019/11/06 23:07 android-4.14 f7fedd5c15c1 da505f84 .config console log report ci-android-414-kasan-gce-root
2019/11/06 20:53 android-4.14 f7fedd5c15c1 da505f84 .config console log report ci-android-414-kasan-gce-root
2019/11/06 19:33 android-4.14 f7fedd5c15c1 da505f84 .config console log report ci-android-414-kasan-gce-root
2019/11/06 17:08 android-4.14 f7fedd5c15c1 da505f84 .config console log report ci-android-414-kasan-gce-root
2019/11/06 16:22 android-4.14 f7fedd5c15c1 da505f84 .config console log report ci-android-414-kasan-gce-root
* Struck through repros no longer work on HEAD.