syzbot


KASAN: use-after-free Read in drm_gem_object_release_handle
Status: upstream: reported C repro on 2021/11/16 09:24
Reported-by: syzbot+c8ae65286134dd1b800d@syzkaller.appspotmail.com
First crash: 194d, last: 3d00h

Cause bisection: introduced by (bisect log) :
commit 45d9c8dde4cd8589f9180309ec60f0da2ce486e4
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu Aug 12 13:14:12 2021 +0000

  drm/vgem: use shmem helpers

Crash: KASAN: use-after-free Read in drm_gem_object_release_handle (log)
Repro: C syz .config

Sample crash report:
RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffc000
RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000100000000
R10: 0000000000000012 R11: 0000000000000246 R12: 00007ffea6f5def0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
==================================================================
BUG: KASAN: use-after-free in drm_gem_object_release_handle+0x3b/0xf0 drivers/gpu/drm/drm_gem.c:253
Read of size 8 at addr ffff8880228f8a28 by task syz-executor356/3604

CPU: 0 PID: 3604 Comm: syz-executor356 Not tainted 5.18.0-rc7-syzkaller-00119-gb015dcd62b86 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description+0x65/0x4b0 mm/kasan/report.c:313
 print_report+0xf4/0x210 mm/kasan/report.c:429
 kasan_report+0xfb/0x130 mm/kasan/report.c:491
 drm_gem_object_release_handle+0x3b/0xf0 drivers/gpu/drm/drm_gem.c:253
 idr_for_each+0x1f8/0x2e0 lib/idr.c:208
 drm_gem_release+0x21/0x30 drivers/gpu/drm/drm_gem.c:931
 drm_file_free+0x6ac/0x920 drivers/gpu/drm/drm_file.c:281
 drm_close_helper drivers/gpu/drm/drm_file.c:308 [inline]
 drm_release+0x33e/0x5c0 drivers/gpu/drm/drm_file.c:495
 __fput+0x3b9/0x820 fs/file_table.c:317
 task_work_run+0x146/0x1c0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:37 [inline]
 do_exit+0x547/0x1eb0 kernel/exit.c:795
 do_group_exit+0x23b/0x2f0 kernel/exit.c:925
 __do_sys_exit_group kernel/exit.c:936 [inline]
 __se_sys_exit_group kernel/exit.c:934 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:934
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe09e8dee19
Code: Unable to access opcode bytes at RIP 0x7fe09e8dedef.
RSP: 002b:00007ffea6f5df58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fe09e9523f0 RCX: 00007fe09e8dee19
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000100000000
R10: 0000000000000012 R11: 0000000000000246 R12: 00007fe09e9523f0
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>

Allocated by task 3604:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:436 [inline]
 ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:515
 kasan_kmalloc include/linux/kasan.h:234 [inline]
 kmem_cache_alloc_trace+0x94/0x310 mm/slub.c:3258
 kmalloc include/linux/slab.h:581 [inline]
 kzalloc include/linux/slab.h:714 [inline]
 vgem_gem_create_object+0x46/0xa0 drivers/gpu/drm/vgem/vgem_drv.c:98
 __drm_gem_shmem_create+0x7c/0x310 drivers/gpu/drm/drm_gem_shmem_helper.c:62
 drm_gem_shmem_create drivers/gpu/drm/drm_gem_shmem_helper.c:127 [inline]
 drm_gem_shmem_create_with_handle drivers/gpu/drm/drm_gem_shmem_helper.c:423 [inline]
 drm_gem_shmem_dumb_create+0x243/0x420 drivers/gpu/drm/drm_gem_shmem_helper.c:533
 drm_ioctl_kernel+0x33e/0x4f0 drivers/gpu/drm/drm_ioctl.c:782
 drm_ioctl+0x626/0xa10 drivers/gpu/drm/drm_ioctl.c:885
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 3604:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4c/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0xd8/0x110 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1754
 slab_free mm/slub.c:3510 [inline]
 kfree+0xc6/0x210 mm/slub.c:4552
 drm_gem_object_free drivers/gpu/drm/drm_gem.c:973 [inline]
 kref_put include/linux/kref.h:65 [inline]
 __drm_gem_object_put include/drm/drm_gem.h:371 [inline]
 drm_gem_object_put include/drm/drm_gem.h:384 [inline]
 drm_gem_mmap+0x4c9/0x760 drivers/gpu/drm/drm_gem.c:1133
 call_mmap include/linux/fs.h:2055 [inline]
 mmap_region+0x11ff/0x1730 mm/mmap.c:1791
 do_mmap+0x7a7/0xdf0 mm/mmap.c:1582
 vm_mmap_pgoff+0x1e5/0x2f0 mm/util.c:519
 ksys_mmap_pgoff+0x48c/0x6d0 mm/mmap.c:1628
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff8880228f8800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 552 bytes inside of
 1024-byte region [ffff8880228f8800, ffff8880228f8c00)

The buggy address belongs to the physical page:
page:ffffea00008a3e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x228f8
head:ffffea00008a3e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888011441dc0
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3599, tgid 3599 (sshd), ts 45730919026, free_ts 45679182628
 prep_new_page mm/page_alloc.c:2441 [inline]
 get_page_from_freelist+0x72e/0x7a0 mm/page_alloc.c:4182
 __alloc_pages+0x26c/0x5f0 mm/page_alloc.c:5408
 alloc_slab_page+0x70/0xf0 mm/slub.c:1799
 allocate_slab+0x5e/0x560 mm/slub.c:1944
 new_slab mm/slub.c:2004 [inline]
 ___slab_alloc+0x41e/0xcd0 mm/slub.c:3005
 __slab_alloc mm/slub.c:3092 [inline]
 slab_alloc_node mm/slub.c:3183 [inline]
 __kmalloc_node_track_caller+0x2bb/0x3f0 mm/slub.c:4947
 kmalloc_reserve net/core/skbuff.c:354 [inline]
 __alloc_skb+0x11a/0x590 net/core/skbuff.c:426
 alloc_skb_fclone include/linux/skbuff.h:1350 [inline]
 tcp_stream_alloc_skb+0x67/0x480 net/ipv4/tcp.c:863
 tcp_sendmsg_locked+0xd64/0x3fc0 net/ipv4/tcp.c:1298
 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1449
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 sock_write_iter+0x37c/0x4e0 net/socket.c:1061
 call_write_iter include/linux/fs.h:2050 [inline]
 new_sync_write fs/read_write.c:504 [inline]
 vfs_write+0xa22/0xd40 fs/read_write.c:591
 ksys_write+0x19b/0x2c0 fs/read_write.c:644
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1356 [inline]
 free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1406
 free_unref_page_prepare mm/page_alloc.c:3328 [inline]
 free_unref_page+0x7d/0x390 mm/page_alloc.c:3423
 do_slab_free mm/slub.c:3498 [inline]
 ___cache_free+0x118/0x1a0 mm/slub.c:3517
 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:446
 kasan_slab_alloc include/linux/kasan.h:224 [inline]
 slab_post_alloc_hook mm/slab.h:749 [inline]
 slab_alloc_node mm/slub.c:3217 [inline]
 slab_alloc mm/slub.c:3225 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3232 [inline]
 kmem_cache_alloc+0x199/0x2f0 mm/slub.c:3242
 getname_flags+0xb8/0x4e0 fs/namei.c:138
 vfs_fstatat fs/stat.c:254 [inline]
 __do_sys_newfstatat fs/stat.c:425 [inline]
 __se_sys_newfstatat+0xd4/0x790 fs/stat.c:419
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Memory state around the buggy address:
 ffff8880228f8900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880228f8980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880228f8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff8880228f8a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880228f8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (198):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-smack-root 2022/05/20 12:11 upstream b015dcd62b86 cb1ac2e7 .config log report syz C KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-root 2022/04/23 10:00 upstream c00c5e1d157b 131df97d .config log report syz C KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/02/28 19:34 upstream 7e57714cd0ad 45a13a73 .config log report syz C KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/01/05 03:03 upstream c9e6606c7fe9 0a2584dd .config log report syz C KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2021/12/19 10:39 upstream 3f667b5d4053 44068e19 .config log report syz C KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2021/12/18 20:09 linux-next fbf252e09678 44068e19 .config log report syz C KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/05/21 21:38 upstream 6c3f5bec9b40 7268fa62 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-root 2022/05/20 05:03 upstream b015dcd62b86 cb1ac2e7 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/05/19 15:33 upstream f993aed406ea 50c53f39 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-root 2022/05/19 03:54 upstream ef1302160bfb 50c53f39 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/05/17 18:16 upstream 42226c989789 744a39e2 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-root 2022/05/16 03:55 upstream bc403203d65a 744a39e2 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/05/15 07:51 upstream 2fe1020d73ca 744a39e2 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/05/13 03:57 upstream 0ac824f379fb 9ad6612a .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/05/12 05:48 upstream feb9c5e19e91 beb0b407 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/05/10 14:18 upstream 9be9ed2612b5 8b277b8e .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-smack-root 2022/05/10 08:39 upstream 9be9ed2612b5 8b277b8e .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/29 13:25 upstream 38d741cb70b3 e9076525 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/27 05:24 upstream cf424ef014ac 1fa34c1b .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-root 2022/04/25 03:04 upstream 5206548f6e67 131df97d .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/23 17:11 upstream c00c5e1d157b 131df97d .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/23 01:32 upstream d569e86915b7 131df97d .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/22 08:32 upstream 59f0c2447e25 2738b391 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-root 2022/04/20 17:16 upstream 559089e0a93d 160a3f31 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/20 16:50 upstream 559089e0a93d 160a3f31 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-selinux-root 2022/04/18 23:52 upstream b2d229d4ddb1 8bcc32a6 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/16 18:56 upstream 59250f8a7f3a 8bcc32a6 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/14 15:21 upstream a19944809fe9 b17b2923 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/14 11:30 upstream a19944809fe9 b17b2923 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/11 20:45 upstream ce522ba9ef7e af01ee7d .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-selinux-root 2022/04/11 03:15 upstream 1862a69c9174 e22c3da3 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/11 02:00 upstream 4ea3c6425269 e22c3da3 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/07 02:10 upstream 3e732ebf7316 97582466 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/07 00:22 upstream 3e732ebf7316 97582466 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/04/06 20:46 upstream 3e732ebf7316 97582466 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-root 2022/04/03 11:26 upstream be2d3ecedd99 79a2a8fc .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-selinux-root 2022/03/21 19:05 upstream f443e374ae13 e2d91b1d .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-root 2022/03/20 15:37 upstream 14702b3b2438 e2d91b1d .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/03/20 12:30 upstream 14702b3b2438 e2d91b1d .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-smack-root 2022/03/19 14:26 upstream 34e047aa16c0 e2d91b1d .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/03/19 11:41 upstream 34e047aa16c0 e2d91b1d .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/03/14 05:17 upstream f0e18b03fcaf 9e8eaa75 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/03/13 23:06 upstream f0e18b03fcaf 9e8eaa75 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce 2022/03/11 21:43 upstream 79b00034e9dc 9e8eaa75 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-root 2022/03/10 00:01 upstream e7e19defa575 9e8eaa75 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-qemu-upstream 2022/01/16 01:50 upstream a33f5c380c4b 723cfaf0 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-386 2022/01/18 14:15 upstream e3a8b6a1e70c 731a2d23 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-qemu-upstream-386 2021/12/06 18:00 upstream 0fcfb00b28c0 579a8754 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-qemu-upstream-386 2021/11/16 05:50 upstream 8ab774587903 83f5c9b5 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kasan-gce-386 2021/11/11 12:16 upstream debe436e77c7 75b04091 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/05/18 01:23 linux-next 3f7bdc402fb0 744a39e2 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/05/16 22:10 linux-next 3f7bdc402fb0 744a39e2 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/05/16 19:32 linux-next 3f7bdc402fb0 744a39e2 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/05/12 21:20 linux-next 187b9ac8c348 9ad6612a .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/05/12 05:53 linux-next 38a288f5941e beb0b407 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/05/11 11:58 linux-next 38a288f5941e 8d7b3b67 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/04/24 17:34 linux-next f1244c81da13 131df97d .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/04/22 00:04 linux-next f1244c81da13 2738b391 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/04/09 10:53 linux-next ff511c1c68a5 e22c3da3 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/03/20 20:05 linux-next 91265a6da44d e2d91b1d .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/03/14 23:37 linux-next 91265a6da44d 9e8eaa75 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/03/14 19:45 linux-next 91265a6da44d 9e8eaa75 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-linux-next-kasan-gce-root 2022/03/09 17:48 linux-next 91265a6da44d 9e8eaa75 .config log report info KASAN: use-after-free Read in drm_gem_object_release_handle
ci-upstream-kmsan-gce 2022/04/24 10:27 https://github.com/google/kmsan.git master b834db009dc5 131df97d .config log report info KMSAN: uninit-value in drm_gem_object_release_handle
ci-upstream-kmsan-gce 2022/01/17 19:18 https://github.com/google/kmsan.git master fa3879a274df 731a2d23 .config log report info KMSAN: uninit-value in drm_gem_object_release_handle