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: 559d, last: 60d

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2021/03/10 13:52	9m	igormtorrente@gmail.com		https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ master	report log
2020/09/23 10:43	12m	anant.thazhemadam@gmail.com		upstream	report log

Sample crash report:

BUG: memory leak
unreferenced object 0xffff888127338180 (size 64):
  comm "syz-executor.6", pid 11434, jiffies 4294961165 (age 15.480s)
  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 4a 0d 28 81 88 ff ff  .........J.(....
  backtrace:
    [<ffffffff825b2892>] kmalloc include/linux/slab.h:591 [inline]
    [<ffffffff825b2892>] drm_vma_node_allow+0x32/0x120 drivers/gpu/drm/drm_vma_manager.c:274
    [<ffffffff825983b7>] drm_gem_handle_create_tail+0x107/0x250 drivers/gpu/drm/drm_gem.c:390
    [<ffffffff826271bd>] vgem_gem_create drivers/gpu/drm/vgem/vgem_drv.c:203 [inline]
    [<ffffffff826271bd>] vgem_gem_dumb_create+0x8d/0x240 drivers/gpu/drm/vgem/vgem_drv.c:223
    [<ffffffff825c72f1>] drm_mode_create_dumb+0x121/0x150 drivers/gpu/drm/drm_dumb_buffers.c:96
    [<ffffffff82599660>] drm_ioctl_kernel+0xf0/0x160 drivers/gpu/drm/drm_ioctl.c:795
    [<ffffffff82599c7a>] drm_ioctl+0x2ea/0x4f0 drivers/gpu/drm/drm_ioctl.c:898
    [<ffffffff8158e45c>] vfs_ioctl fs/ioctl.c:51 [inline]
    [<ffffffff8158e45c>] __do_sys_ioctl fs/ioctl.c:1069 [inline]
    [<ffffffff8158e45c>] __se_sys_ioctl fs/ioctl.c:1055 [inline]
    [<ffffffff8158e45c>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:1055
    [<ffffffff843b6675>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff843b6675>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

Crashes (11):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	Title
ci-upstream-gce-leak	2021/08/20 06:30	upstream	f87d64319e6f	b599f2fc	.config	log	report	syz	memory leak in drm_vma_node_allow
ci-upstream-gce-leak	2021/08/01 20:12	upstream	f3438b4c4e69	6c236867	.config	log	report	syz	memory leak in drm_vma_node_allow
ci-upstream-gce-leak	2021/07/21 09:32	upstream	8cae8cd89f05	1b201b48	.config	log	report	syz	memory leak in drm_vma_node_allow
ci-upstream-gce-leak	2021/02/27 10:03	upstream	3fb6d0e00efc	4c37c133	.config	log	report	syz	memory leak in drm_vma_node_allow
ci-upstream-gce-leak	2021/01/10 20:53	upstream	2ff90100ace8	2c1f2513	.config	log	report	syz
ci-upstream-gce-leak	2021/01/06 13:28	upstream	6207214a70bf	b1c228e1	.config	log	report	syz
ci-upstream-gce-leak	2020/12/19 06:51	upstream	a409ed156a90	04201c06	.config	log	report	syz
ci-upstream-gce-leak	2020/12/12 01:44	upstream	33dc9614dc20	ba24ffcd	.config	log	report	syz
ci-upstream-gce-leak	2020/12/11 23:54	upstream	33dc9614dc20	ba24ffcd	.config	log	report	syz
ci-upstream-gce-leak	2020/12/11 21:43	upstream	33dc9614dc20	ba24ffcd	.config	log	report	syz
ci-upstream-gce-leak	2020/04/07 07:48	upstream	7e63420847ae	99a96044	.config	log	report	syz