syzbot


kernel BUG in eth_header

Status: auto-obsoleted due to no activity on 2023/09/21 00:49
Subsystems: net
[Documentation on labels]
First crash: 258d, last: 255d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in eth_header (2) net C 2 42d 42d 25/26 internal: reported C repro on 2024/01/17 05:05
upstream kernel BUG in netem_enqueue net 9 439d 664d 22/26 fixed on 2023/02/24 13:50

Sample crash report:
skbuff: skb_under_panic: text:ffffffff88287cb1 len:20 put:14 head:ffff88801e8fdc00 data:ffff88801e8fdbf2 tail:0x6 end:0x140 dev:bond0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:200!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 30655 Comm: syz-executor.0 Not tainted 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:skb_panic+0x152/0x1d0 net/core/skbuff.c:200
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 bf 5d 8b 41 57 56 48 89 ee 52 4c 89 e2 e8 9e a7 60 f9 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 b9 97 ce f9 4c
RSP: 0018:ffffc90008977750 EFLAGS: 00010286
RAX: 0000000000000085 RBX: ffff8880488ae580 RCX: ffffc90003bdb000
RDX: 0000000000000000 RSI: ffffffff8167dd6c RDI: 0000000000000005
RBP: ffffffff8b5dcd60 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000003fd8 R12: ffffffff88287cb1
R13: 000000000000000e R14: ffff888020560000 R15: 0000000000000140
FS:  00007f074e506700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200ce030 CR3: 0000000078bac000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 skb_under_panic net/core/skbuff.c:210 [inline]
 skb_push+0xc8/0xe0 net/core/skbuff.c:2409
 eth_header+0x31/0x1f0 net/ethernet/eth.c:83
 dev_hard_header include/linux/netdevice.h:3140 [inline]
 llc_mac_hdr_init+0x133/0x190 net/llc/llc_output.c:33
 llc_sap_action_send_xid_c+0x23e/0x370 net/llc/llc_s_ac.c:85
 llc_exec_sap_trans_actions net/llc/llc_sap.c:153 [inline]
 llc_sap_next_state net/llc/llc_sap.c:182 [inline]
 llc_sap_state_process+0x22f/0x500 net/llc/llc_sap.c:209
 llc_ui_sendmsg+0xa6f/0x1150 net/llc/af_llc.c:990
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:747
 ____sys_sendmsg+0x334/0x900 net/socket.c:2503
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557
 __sys_sendmmsg+0x18f/0x460 net/socket.c:2643
 __do_sys_sendmmsg net/socket.c:2672 [inline]
 __se_sys_sendmmsg net/socket.c:2669 [inline]
 __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2669
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f074d88c149
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f074e506168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f074d9ac050 RCX: 00007f074d88c149
RDX: 03fffffffffffeed RSI: 0000000020001380 RDI: 0000000000000005
RBP: 00007f074d8e7cad R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdc79e82df R14: 00007f074e506300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_panic+0x152/0x1d0 net/core/skbuff.c:200
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 bf 5d 8b 41 57 56 48 89 ee 52 4c 89 e2 e8 9e a7 60 f9 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 b9 97 ce f9 4c
RSP: 0018:ffffc90008977750 EFLAGS: 00010286
RAX: 0000000000000085 RBX: ffff8880488ae580 RCX: ffffc90003bdb000
RDX: 0000000000000000 RSI: ffffffff8167dd6c RDI: 0000000000000005
RBP: ffffffff8b5dcd60 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000003fd8 R12: ffffffff88287cb1
R13: 000000000000000e R14: ffff888020560000 R15: 0000000000000140
FS:  00007f074e506700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020210000 CR3: 0000000078bac000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/06/15 00:00 upstream b6dad5178cea 76decb82 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root kernel BUG in eth_header
2023/06/17 10:54 net 4aaf2c52834b f3921d4d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce kernel BUG in eth_header
* Struck through repros no longer work on HEAD.