Date: Mon, 17 Jun 2024 14:05:09 +1000
From: Dave Airlie <airlied@...il.com>
To: Ubisectech Sirius <bugreport@...sectech.com>
Cc: linux-kernel <linux-kernel@...r.kernel.org>, 
	"maarten.lankhorst" <maarten.lankhorst@...ux.intel.com>, mripard <mripard@...nel.org>, 
	tzimmermann <tzimmermann@...e.de>, dri-devel <dri-devel@...ts.freedesktop.org>
Subject: Re: WARNING in drm_mode_create_lease_ioctl

Cc'ing dri-devel

Does https://lore.kernel.org/dri-devel/20240617035258.2774032-1-airlied@gmail.com/T/#u
help?

Thanks,

Dave.

On Mon, 17 Jun 2024 at 13:12, Ubisectech Sirius
<bugreport@...sectech.com> 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.
>
> Stack dump:
>
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 18929 at mm/page_alloc.c:4545 __alloc_pages+0x402/0x21b0 mm/page_alloc.c:4545
> Modules linked in:
> CPU: 1 PID: 18929 Comm: syz-executor.3 Not tainted 6.8.0 #1
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
> RIP: 0010:__alloc_pages+0x402/0x21b0 mm/page_alloc.c:4545
> Code: ff 00 0f 84 15 fe ff ff 80 ce 01 e9 0d fe ff ff 83 fe 0a 0f 86 0e fd ff ff 80 3d c7 cf 6a 0d 00 75 0b c6 05 be cf 6a 0d 01 90 <0f> 0b 90 45 31 e4 e9 87 fe ff ff e8 5e 3e 9b ff 84 c0 0f 85 7a fe
> RSP: 0018:ffffc90001cc7808 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff92000398f14
> RDX: 0000000000000001 RSI: 000000000000000b RDI: 0000000000040dc0
> RBP: ffffc90001cc7ab8 R08: 0000000000000007 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000000 R12: 00000000007a1200
> R13: 000000000000000b R14: 0000000000040dc0 R15: 000000000000000b
> FS:  00007f1717ba5640(0000) GS:ffff88807ec00000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00000000203d0000 CR3: 000000001f5c0000 CR4: 0000000000750ef0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> PKRU: 55555554
> Call Trace:
>  <TASK>
>  __alloc_pages_node include/linux/gfp.h:238 [inline]
>  alloc_pages_node include/linux/gfp.h:261 [inline]
>  __kmalloc_large_node+0x88/0x1a0 mm/slub.c:3926
>  __do_kmalloc_node mm/slub.c:3969 [inline]
>  __kmalloc+0x370/0x480 mm/slub.c:3994
>  kmalloc_array include/linux/slab.h:627 [inline]
>  kcalloc include/linux/slab.h:658 [inline]
>  fill_object_idr drivers/gpu/drm/drm_lease.c:389 [inline]
>  drm_mode_create_lease_ioctl+0x4ca/0x1f70 drivers/gpu/drm/drm_lease.c:522
>  drm_ioctl_kernel+0x1eb/0x3f0 drivers/gpu/drm/drm_ioctl.c:744
>  drm_ioctl+0x582/0xb70 drivers/gpu/drm/drm_ioctl.c:841
>  vfs_ioctl fs/ioctl.c:51 [inline]
>  __do_sys_ioctl fs/ioctl.c:871 [inline]
>  __se_sys_ioctl fs/ioctl.c:857 [inline]
>  __x64_sys_ioctl+0x1a1/0x210 fs/ioctl.c:857
>  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: 0033:0x7f1716e8eeed
> Code: c3 e8 97 2b 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 b0 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007f1717ba5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> RAX: ffffffffffffffda RBX: 00007f1716fe3f80 RCX: 00007f1716e8eeed
> RDX: 00000000200003c0 RSI: 00000000c01864c6 RDI: 0000000000000003
> RBP: 00007f1716f13014 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 000000000000000b R14: 00007f1716fe3f80 R15: 00007f1717b85000
>  </TASK>
>
>
> Thank you for taking the time to read this email and we look forward to working with you further.
>
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