memory leak in drm_vma_node

memory leak in drm_vma_node_allow
Status: upstream: reported syz repro on 2020/04/11 07:59
Reported-by: syzbot+04639d98c75c52e41b8a@syzkaller.appspotmail.com
First crash: 283d, last: 4d23h

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2020/09/23 10:43	12m	anant.thazhemadam@gmail.com		upstream	report log

Sample crash report:

2021/01/10 19:11:19 executed programs: 15
2021/01/10 19:11:26 executed programs: 39
2021/01/10 19:11:32 executed programs: 53
2021/01/10 19:11:39 executed programs: 66
BUG: memory leak
unreferenced object 0xffff888125bc8600 (size 64):
  comm "syz-executor.1", pid 10600, jiffies 4294947205 (age 14.970s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 bc 6a 25 81 88 ff ff  ..........j%....
  backtrace:
    [<0000000088ca0068>] kmalloc include/linux/slab.h:552 [inline]
    [<0000000088ca0068>] drm_vma_node_allow+0x32/0x120 drivers/gpu/drm/drm_vma_manager.c:274
    [<0000000032a3e1af>] drm_gem_handle_create_tail+0x107/0x250 drivers/gpu/drm/drm_gem.c:400
    [<00000000649746bf>] vgem_gem_create drivers/gpu/drm/vgem/vgem_drv.c:203 [inline]
    [<00000000649746bf>] vgem_gem_dumb_create+0x8d/0x240 drivers/gpu/drm/vgem/vgem_drv.c:223
    [<000000004d14160e>] drm_mode_create_dumb+0x121/0x150 drivers/gpu/drm/drm_dumb_buffers.c:94
    [<00000000c136f317>] drm_ioctl_kernel+0xf0/0x160 drivers/gpu/drm/drm_ioctl.c:787
    [<0000000050d828d2>] drm_ioctl+0x2c8/0x4c0 drivers/gpu/drm/drm_ioctl.c:887
    [<000000009936ec8b>] vfs_ioctl fs/ioctl.c:48 [inline]
    [<000000009936ec8b>] __do_sys_ioctl fs/ioctl.c:753 [inline]
    [<000000009936ec8b>] __se_sys_ioctl fs/ioctl.c:739 [inline]
    [<000000009936ec8b>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:739
    [<000000001b69e286>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<00000000c5e7cb1d>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Crashes (7):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	Maintainers
ci-upstream-gce-leak	2021/01/10 20:53	upstream	2ff90100	2c1f2513	.config	log	report	syz	airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de
ci-upstream-gce-leak	2021/01/06 13:28	upstream	6207214a	b1c228e1	.config	log	report	syz	airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de
ci-upstream-gce-leak	2020/12/19 06:51	upstream	a409ed15	04201c06	.config	log	report	syz	airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de
ci-upstream-gce-leak	2020/12/12 01:44	upstream	33dc9614	ba24ffcd	.config	log	report	syz	airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de
ci-upstream-gce-leak	2020/12/11 23:54	upstream	33dc9614	ba24ffcd	.config	log	report	syz	airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de
ci-upstream-gce-leak	2020/12/11 21:43	upstream	33dc9614	ba24ffcd	.config	log	report	syz	airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de
ci-upstream-gce-leak	2020/04/07 07:48	upstream	7e634208	99a96044	.config	log	report	syz	airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de