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: 379d, last: 53d

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:

2021/02/27 08:21:05 executed programs: 35
2021/02/27 08:21:12 executed programs: 44
2021/02/27 08:21:19 executed programs: 61
2021/02/27 08:21:25 executed programs: 78
BUG: memory leak
unreferenced object 0xffff888124dbcc00 (size 64):
  comm "syz-executor.0", pid 10547, jiffies 4294948272 (age 16.150s)
  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 26 f8 23 81 88 ff ff  .........&.#....
  backtrace:
    [<000000007b166cab>] kmalloc include/linux/slab.h:554 [inline]
    [<000000007b166cab>] drm_vma_node_allow+0x32/0x120 drivers/gpu/drm/drm_vma_manager.c:274
    [<00000000ade0b423>] drm_gem_handle_create_tail+0x107/0x250 drivers/gpu/drm/drm_gem.c:390
    [<00000000285183c0>] vgem_gem_create drivers/gpu/drm/vgem/vgem_drv.c:203 [inline]
    [<00000000285183c0>] vgem_gem_dumb_create+0x8d/0x240 drivers/gpu/drm/vgem/vgem_drv.c:223
    [<00000000bee37ddc>] drm_mode_create_dumb+0x121/0x150 drivers/gpu/drm/drm_dumb_buffers.c:96
    [<000000000c8b4f60>] drm_ioctl_kernel+0xf0/0x160 drivers/gpu/drm/drm_ioctl.c:787
    [<00000000e19a9ddc>] drm_ioctl+0x2c8/0x4c0 drivers/gpu/drm/drm_ioctl.c:887
    [<0000000052bb8ef0>] vfs_ioctl fs/ioctl.c:48 [inline]
    [<0000000052bb8ef0>] __do_sys_ioctl fs/ioctl.c:753 [inline]
    [<0000000052bb8ef0>] __se_sys_ioctl fs/ioctl.c:739 [inline]
    [<0000000052bb8ef0>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:739
    [<00000000381743da>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<00000000645f64a2>] entry_SYSCALL_64_after_hwframe+0x44/0xae

Crashes (8):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	Title
ci-upstream-gce-leak	2021/02/27 10:03	upstream	3fb6d0e0	4c37c133	.config	log	report	syz	memory leak in drm_vma_node_allow
ci-upstream-gce-leak	2021/01/10 20:53	upstream	2ff90100	2c1f2513	.config	log	report	syz
ci-upstream-gce-leak	2021/01/06 13:28	upstream	6207214a	b1c228e1	.config	log	report	syz
ci-upstream-gce-leak	2020/12/19 06:51	upstream	a409ed15	04201c06	.config	log	report	syz
ci-upstream-gce-leak	2020/12/12 01:44	upstream	33dc9614	ba24ffcd	.config	log	report	syz
ci-upstream-gce-leak	2020/12/11 23:54	upstream	33dc9614	ba24ffcd	.config	log	report	syz
ci-upstream-gce-leak	2020/12/11 21:43	upstream	33dc9614	ba24ffcd	.config	log	report	syz
ci-upstream-gce-leak	2020/04/07 07:48	upstream	7e634208	99a96044	.config	log	report	syz