Re: BUG: stack guard page was hit in vsock_connectible_recvmsg

[Stefano Garzarella <sgarzare@xxxxxxxxxx>]

Hi,

On Mon, Aug 05, 2024 at 08:44:11AM GMT, Ubisectech Sirius wrote:
> Hello.
> We are Ubisectech Sirius Team, the vulnerability lab of China ValiantSec. Recently, our team has discovered a issue in Linux kernel 6.8. Attached to the email were a PoC file of the issue.

Thanks for the report!

It looks like this is releated to the net/vmw_vsock/vsock_bpf.c, so I'm 
CCing Bobby who developed that.

@Bobby if you have time, please take a look.

I'm trying to replicate on a VM with 6.8 kernel, but for now I can't 
reproduce it.

How reproducible is it in your system?

I see that the reproducer was generated by syzkaller.
Is that internal or public instance?
In the second case, do you have a link to the report?

From the report I see that you're using 6.8.0.
Is it the upstream version (commit 
e8f897f4afef0031fe618a8e94127a0934896aba)?
Can you replicate this with more recent versions as well?

Thanks,
Stefano

> Stack dump:
> BUG: TASK stack guard page was hit at ffffc90001b27f88 (stack is 
> ffffc90001b28000..ffffc90001b30000)
> stack guard page: 0000 [#1] PREEMPT SMP KASAN NOPTI
> CPU: 0 PID: 8069 Comm: syz-executor293 Not tainted 6.8.0 #1
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
> RIP: 0010:mark_lock+0x25/0xd60 kernel/locking/lockdep.c:4639
> Code: 90 90 90 90 90 55 48 89 e5 41 57 41 56 41 55 41 54 41 89 d4 48 ba 00 00 00 00 00 fc ff df 53 48 83 e4 f0 48 81 ec 10 01 00 00 <48> c7 44 24 30 b3 8a b5 41 48 8d 5c 24 30 48 c7 44 24 38 00 88 b9
> RSP: 0018:ffffc90001b27f90 EFLAGS: 00010086
> RAX: 0000000000000004 RBX: ffff888042cd2fa2 RCX: ffff888042cd2f64
> RDX: dffffc0000000000 RSI: ffff888042cd2f80 RDI: ffff888042cd24c0
> RBP: ffffc90001b280c8 R08: 0000000000000001 R09: fffffbfff2711214
> R10: ffffffff938890a7 R11: 0000000000000000 R12: 0000000000000002
> R13: 0000000000000000 R14: ffff888042cd24c0 R15: 000000000004073c
> FS:  00005555558f13c0(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffc90001b27f88 CR3: 0000000048cb8000 CR4: 0000000000750ef0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> PKRU: 55555554
> Call Trace:
> <#DF>
> </#DF>
> <TASK>
> mark_usage kernel/locking/lockdep.c:4587 [inline]
> __lock_acquire+0x91e/0x3bc0 kernel/locking/lockdep.c:5091
> lock_acquire kernel/locking/lockdep.c:5754 [inline]
> lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5719
> lock_sock_nested+0x3a/0xf0 net/core/sock.c:3523
> lock_sock include/net/sock.h:1691 [inline]
> vsock_connectible_recvmsg+0xdd/0xba0 net/vmw_vsock/af_vsock.c:2196
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> __vsock_recvmsg net/vmw_vsock/vsock_bpf.c:67 [inline]
> vsock_bpf_recvmsg+0xb41/0x11a0 net/vmw_vsock/vsock_bpf.c:105
> vsock_connectible_recvmsg+0x92b/0xba0 net/vmw_vsock/af_vsock.c:2240
> sock_recvmsg_nosec net/socket.c:1046 [inline]
> sock_recvmsg+0x1de/0x240 net/socket.c:1068
> ____sys_recvmsg+0x216/0x670 net/socket.c:2803
> ___sys_recvmsg+0xff/0x190 net/socket.c:2845
> __sys_recvmsg+0xfb/0x1d0 net/socket.c:2875
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x6f/0x77
> RIP: 0033:0x7f6c450819cd
> Code: c3 e8 a7 1f 00 00 0f 1f 80 00 00 00 00 f3 0f 1e fa 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:00007ffcae667888 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
> RAX: ffffffffffffffda RBX: 0000000000016644 RCX: 00007f6c450819cd
> RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000005
> RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcae66789c
> R13: 431bde82d7b634db R14: 00007f6c450fe4f0 R15: 0000000000000001
> </TASK>
> Modules linked in:
> ---[ end trace 0000000000000000 ]---
> RIP: 0010:mark_lock+0x25/0xd60 kernel/locking/lockdep.c:4639
> Code: 90 90 90 90 90 55 48 89 e5 41 57 41 56 41 55 41 54 41 89 d4 48 ba 00 00 00 00 00 fc ff df 53 48 83 e4 f0 48 81 ec 10 01 00 00 <48> c7 44 24 30 b3 8a b5 41 48 8d 5c 24 30 48 c7 44 24 38 00 88 b9
> RSP: 0018:ffffc90001b27f90 EFLAGS: 00010086
> RAX: 0000000000000004 RBX: ffff888042cd2fa2 RCX: ffff888042cd2f64
> RDX: dffffc0000000000 RSI: ffff888042cd2f80 RDI: ffff888042cd24c0
> RBP: ffffc90001b280c8 R08: 0000000000000001 R09: fffffbfff2711214
> R10: ffffffff938890a7 R11: 0000000000000000 R12: 0000000000000002
> R13: 0000000000000000 R14: ffff888042cd24c0 R15: 000000000004073c
> FS:  00005555558f13c0(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffc90001b27f88 CR3: 0000000048cb8000 CR4: 0000000000750ef0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> PKRU: 55555554
> ----------------
> Code disassembly (best guess):
>   0:   90                      nop
>   1:   90                      nop
>   2:   90                      nop
>   3:   90                      nop
>   4:   90                      nop
>   5:   55                      push   %rbp
>   6:   48 89 e5                mov    %rsp,%rbp
>   9:   41 57                   push   %r15
>   b:   41 56                   push   %r14
>   d:   41 55                   push   %r13
>   f:   41 54                   push   %r12
>  11:   41 89 d4                mov    %edx,%r12d
>  14:   48 ba 00 00 00 00 00    movabs $0xdffffc0000000000,%rdx
>  1b:   fc ff df
>  1e:   53                      push   %rbx
>  1f:   48 83 e4 f0             and    $0xfffffffffffffff0,%rsp
>  23:   48 81 ec 10 01 00 00    sub    $0x110,%rsp
> * 2a:   48 c7 44 24 30 b3 8a    movq   $0x41b58ab3,0x30(%rsp) <-- trapping instruction
>  31:   b5 41
>  33:   48 8d 5c 24 30          lea    0x30(%rsp),%rbx
>  38:   48                      rex.W
>  39:   c7                      .byte 0xc7
>  3a:   44 24 38                rex.R and $0x38,%al
>  3d:   00                      .byte 0x0
>  3e:   88                      .byte 0x88
>  3f:   b9                      .byte 0xb9
>
> Thank you for taking the time to read this email and we look forward to working with you further.