syzbot


general protection fault in bpf_skb_change_head

Status: auto-closed as invalid on 2020/01/25 05:07
Reported-by: syzbot+7462fefe251dcc28b8bc@syzkaller.appspotmail.com
First crash: 1731d, last: 1731d

Sample crash report:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 1 PID: 32218 Comm: syz-executor.3 Not tainted 4.14.146+ #0
task: 00000000f8ba70ec task.stack: 00000000898b1c81
RIP: 0010:skb_is_gso include/linux/skbuff.h:4002 [inline]
RIP: 0010:____bpf_skb_change_head net/core/filter.c:2426 [inline]
RIP: 0010:bpf_skb_change_head+0xe9/0x600 net/core/filter.c:2419
RSP: 0018:ffff8881d3aef7f0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8881c0655e00 RCX: 00000000000001fa
RDX: 000000001021651a RSI: ffffc90000541000 RDI: 00000000810b28d3
RBP: 0000000000000703 R08: 0000000000000001 R09: ffffed103b7644fa
R10: ffffed103b7644f9 R11: ffff8881dbb227cf R12: 00000000810b28cf
R13: 00000000810b2fd3 R14: 00000000810b2fd3 R15: 0000000000000000
FS:  00007f62bbb12700(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6f60d634a0 CR3: 00000001d1cc6004 CR4: 00000000001606a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ___bpf_prog_run+0x2478/0x5510 kernel/bpf/core.c:1095
Code: 7c 08 84 d2 0f 85 4f 04 00 00 44 8b a3 c4 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 03 24 24 49 8d 7c 24 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 
RIP: skb_is_gso include/linux/skbuff.h:4002 [inline] RSP: ffff8881d3aef7f0
RIP: ____bpf_skb_change_head net/core/filter.c:2426 [inline] RSP: ffff8881d3aef7f0
RIP: bpf_skb_change_head+0xe9/0x600 net/core/filter.c:2419 RSP: ffff8881d3aef7f0
---[ end trace 3849040531ceeddf ]---
Kernel panic - not syncing: Fatal exception
Kernel Offset: 0x39800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/09/27 05:06 android-4.14 d649ef04c3ed 2f1548bc .config console log report ci-android-414-kasan-gce-root
* Struck through repros no longer work on HEAD.