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Message-ID: <00000000000070dbbd06196a68ea@google.com> Date: Mon, 27 May 2024 00:24:29 -0700 From: syzbot <syzbot+470d70be7e9ee9f22a01@...kaller.appspotmail.com> To: Jason@...c4.com, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com, wireguard@...ts.zx2c4.com Subject: [syzbot] [wireguard?] general protection fault in wg_packet_receive Hello, syzbot found the following issue on: HEAD commit: 2a8120d7b482 Merge tag 's390-6.10-2' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10263a34980000 kernel config: https://syzkaller.appspot.com/x/.config?x=5dd4fde1337a9e18 dashboard link: https://syzkaller.appspot.com/bug?extid=470d70be7e9ee9f22a01 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-2a8120d7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/78c72ae6bdaf/vmlinux-2a8120d7.xz kernel image: https://storage.googleapis.com/syzbot-assets/99dbb805b738/bzImage-2a8120d7.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+470d70be7e9ee9f22a01@...kaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc001ffff113: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x00000000ffff8898-0x00000000ffff889f] CPU: 0 PID: 10 Comm: kworker/0:1 Not tainted 6.9.0-syzkaller-10713-g2a8120d7b482 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: wg-kex-wg1 wg_packet_handshake_receive_worker RIP: 0010:__lock_acquire+0xe3e/0x3b30 kernel/locking/lockdep.c:5005 Code: 11 00 00 39 05 b3 cf 1f 12 0f 82 be 05 00 00 ba 01 00 00 00 e9 e4 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 82 1f 00 00 49 81 3c 24 a0 3d e3 92 0f 84 98 f2 RSP: 0018:ffffc90000007500 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 000000001ffff113 RSI: ffff888015f20000 RDI: 00000000ffff8898 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8fe29817 R11: 0000000000000004 R12: 00000000ffff8898 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802c000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0016a3000 CR3: 000000005dcac000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 __queue_work+0x39e/0x1020 kernel/workqueue.c:2319 queue_work_on+0x11a/0x140 kernel/workqueue.c:2410 wg_packet_receive+0x13ea/0x2350 drivers/net/wireguard/receive.c:570 wg_receive+0x74/0xc0 drivers/net/wireguard/socket.c:326 udp_queue_rcv_one_skb+0xad1/0x18b0 net/ipv4/udp.c:2131 udp_queue_rcv_skb+0x198/0xd10 net/ipv4/udp.c:2209 udp_unicast_rcv_skb+0x165/0x3b0 net/ipv4/udp.c:2369 __udp4_lib_rcv+0x2636/0x3550 net/ipv4/udp.c:2445 ip_protocol_deliver_rcu+0x30c/0x4e0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x316/0x570 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:460 [inline] ip_rcv_finish net/ipv4/ip_input.c:449 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_rcv+0x2c5/0x5d0 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core+0x199/0x1e0 net/core/dev.c:5624 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5738 process_backlog+0x133/0x760 net/core/dev.c:6067 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6721 napi_poll net/core/dev.c:6790 [inline] net_rx_action+0x9b6/0xf10 net/core/dev.c:6906 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 do_softirq kernel/softirq.c:455 [inline] do_softirq+0xb2/0xf0 kernel/softirq.c:442 </IRQ> <TASK> __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382 wg_socket_send_skb_to_peer+0x14c/0x220 drivers/net/wireguard/socket.c:184 wg_socket_send_buffer_to_peer+0x12b/0x190 drivers/net/wireguard/socket.c:200 wg_packet_send_handshake_response+0x297/0x310 drivers/net/wireguard/send.c:103 wg_receive_handshake_packet+0x248/0xbf0 drivers/net/wireguard/receive.c:154 wg_packet_handshake_receive_worker+0x17f/0x3a0 drivers/net/wireguard/receive.c:213 process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 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+0xe3e/0x3b30 kernel/locking/lockdep.c:5005 Code: 11 00 00 39 05 b3 cf 1f 12 0f 82 be 05 00 00 ba 01 00 00 00 e9 e4 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 82 1f 00 00 49 81 3c 24 a0 3d e3 92 0f 84 98 f2 RSP: 0018:ffffc90000007500 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 000000001ffff113 RSI: ffff888015f20000 RDI: 00000000ffff8898 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8fe29817 R11: 0000000000000004 R12: 00000000ffff8898 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802c000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0016a3000 CR3: 000000005dcac000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 11 00 adc %eax,(%rax) 2: 00 39 add %bh,(%rcx) 4: 05 b3 cf 1f 12 add $0x121fcfb3,%eax 9: 0f 82 be 05 00 00 jb 0x5cd f: ba 01 00 00 00 mov $0x1,%edx 14: e9 e4 00 00 00 jmp 0xfd 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 4c 89 e2 mov %r12,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 82 1f 00 00 jne 0x1fb6 34: 49 81 3c 24 a0 3d e3 cmpq $0xffffffff92e33da0,(%r12) 3b: 92 3c: 0f .byte 0xf 3d: 84 .byte 0x84 3e: 98 cwtl 3f: f2 repnz --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
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