syzbot


general protection fault in wg_packet_receive (2)

Status: upstream: reported on 2024/09/24 12:55
Subsystems: wireguard
[Documentation on labels]
Reported-by: syzbot+c0f4a2553a2527b3fc1f@syzkaller.appspotmail.com
First crash: 18d, last: 18d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [wireguard?] general protection fault in wg_packet_receive (2) 0 (1) 2024/09/24 12:55
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in wg_packet_receive wireguard 3 119d 138d 0/28 auto-obsoleted due to no activity on 2024/09/22 21:29
android-6-1 KASAN: use-after-free Read in wg_packet_receive 1 124d 124d 0/2 auto-obsoleted due to no activity on 2024/09/07 23:22

Sample crash report:
Oops: general protection fault, probably for non-canonical address 0xedfd63131ffff113: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: maybe wild-memory-access in range [0x6feb3898ffff8898-0x6feb3898ffff889f]
CPU: 1 UID: 0 PID: 6046 Comm: kworker/1:8 Not tainted 6.11.0-syzkaller-08833-gde5cb0dcb74c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: wg-kex-wg0 wg_packet_handshake_receive_worker
RIP: 0010:__lock_acquire+0x69/0x2050 kernel/locking/lockdep.c:5062
Code: b6 04 30 84 c0 0f 85 9b 16 00 00 45 31 f6 83 3d 88 66 ab 0e 00 0f 84 b6 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 f9 27 8b 00 48 be 00 00 00 00 00 fc
RSP: 0018:ffffc90000a17fd0 EFLAGS: 00010002
RAX: 0dfd67131ffff113 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 6feb3898ffff8898
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2036ac6 R12: ffff88801e783c00
R13: 0000000000000001 R14: 0000000000000000 R15: 6feb3898ffff8898
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd8f5bfa440 CR3: 0000000029774000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 __queue_work+0x759/0xf50
 queue_work_on+0x1c2/0x380 kernel/workqueue.c:2390
 wg_packet_receive+0x133a/0x2570 drivers/net/wireguard/receive.c:570
 wg_receive+0x75/0xa0 drivers/net/wireguard/socket.c:326
 udpv6_queue_rcv_one_skb+0x1695/0x18a0 net/ipv6/udp.c:726
 udp6_unicast_rcv_skb+0x230/0x370 net/ipv6/udp.c:928
 ip6_protocol_deliver_rcu+0xccf/0x1580 net/ipv6/ip6_input.c:436
 ip6_input_finish+0x187/0x2d0 net/ipv6/ip6_input.c:481
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 __netif_receive_skb_one_core net/core/dev.c:5662 [inline]
 __netif_receive_skb+0x1ea/0x650 net/core/dev.c:5775
 process_backlog+0x662/0x15b0 net/core/dev.c:6107
 __napi_poll+0xcb/0x490 net/core/dev.c:6771
 napi_poll net/core/dev.c:6840 [inline]
 net_rx_action+0x89b/0x1240 net/core/dev.c:6962
 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
 do_softirq+0x11b/0x1e0 kernel/softirq.c:455
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
 wg_socket_send_skb_to_peer+0x176/0x1d0 drivers/net/wireguard/socket.c:184
 wg_packet_send_handshake_response+0x198/0x2e0 drivers/net/wireguard/send.c:103
 wg_receive_handshake_packet drivers/net/wireguard/receive.c:154 [inline]
 wg_packet_handshake_receive_worker+0x5e6/0xf50 drivers/net/wireguard/receive.c:213
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x69/0x2050 kernel/locking/lockdep.c:5062
Code: b6 04 30 84 c0 0f 85 9b 16 00 00 45 31 f6 83 3d 88 66 ab 0e 00 0f 84 b6 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 f9 27 8b 00 48 be 00 00 00 00 00 fc
RSP: 0018:ffffc90000a17fd0 EFLAGS: 00010002
RAX: 0dfd67131ffff113 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 6feb3898ffff8898
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2036ac6 R12: ffff88801e783c00
R13: 0000000000000001 R14: 0000000000000000 R15: 6feb3898ffff8898
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd8f5bfa440 CR3: 0000000029774000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	b6 04                	mov    $0x4,%dh
   2:	30 84 c0 0f 85 9b 16 	xor    %al,0x169b850f(%rax,%rax,8)
   9:	00 00                	add    %al,(%rax)
   b:	45 31 f6             	xor    %r14d,%r14d
   e:	83 3d 88 66 ab 0e 00 	cmpl   $0x0,0xeab6688(%rip)        # 0xeab669d
  15:	0f 84 b6 13 00 00    	je     0x13d1
  1b:	89 54 24 54          	mov    %edx,0x54(%rsp)
  1f:	89 5c 24 68          	mov    %ebx,0x68(%rsp)
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 30 00          	cmpb   $0x0,(%rax,%rsi,1) <-- trapping instruction
  2e:	74 12                	je     0x42
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 f9 27 8b 00       	call   0x8b2831
  38:	48                   	rex.W
  39:	be 00 00 00 00       	mov    $0x0,%esi
  3e:	00 fc                	add    %bh,%ah

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/24 00:08 upstream de5cb0dcb74c 89298aad .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in wg_packet_receive
* Struck through repros no longer work on HEAD.