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KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer (3)

Status: fixed on 2025/07/08 00:33
Subsystems: media
[Documentation on labels]
Reported-by: syzbot+365005005522b70a36f2@syzkaller.appspotmail.com
Fix commit: f83ac8d30c43 media: vivid: Change the siize of the composing
First crash: 371d, last: 13d
▶ ▼ Discussions (6)
Title Replies (including bot) Last reply
[PATCH] media: vivid: Change the siize of the composing 1 (1) 2025/04/15 08:27
[syzbot] Monthly media report (Mar 2025) 0 (1) 2025/03/23 02:21
[syzbot] Monthly media report (Feb 2025) 0 (1) 2025/02/19 12:35
[syzbot] [media?] KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer (3) 0 (2) 2025/02/12 09:11
[syzbot] Monthly media report (Jan 2025) 0 (1) 2025/01/20 08:15
[syzbot] Monthly media report (Dec 2024) 0 (1) 2024/12/19 18:40
▶ ▼ Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer 23 3 35d 71d 0/3 upstream: reported on 2025/05/09 16:36
upstream KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer (4) media 23 4 2d02h 5d20h 0/29 upstream: reported on 2025/07/14 07:23
upstream KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer media 23 1 2009d 2009d 0/29 auto-closed as invalid on 2020/05/17 19:44
linux-5.15 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer 23 1 822d 822d 0/3 auto-obsoleted due to no activity on 2023/08/17 04:37
upstream KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer (2) media 23 C inconclusive done 14 901d 1413d 22/29 fixed on 2023/02/24 13:51
linux-4.19 BUG: unable to handle kernel paging request in tpg_fill_plane_buffer (2) 8 syz error 8 947d 1448d 0/1 upstream: reported syz repro on 2021/08/02 00:51
linux-4.14 BUG: unable to handle kernel paging request in tpg_fill_plane_buffer (2) 8 1 1281d 1281d 0/1 auto-closed as invalid on 2022/05/15 07:48
upstream BUG: unable to handle kernel paging request in tpg_fill_plane_buffer (2) media 8 1 831d 827d 0/29 auto-obsoleted due to no activity on 2023/07/09 12:46

Sample crash report:
==================================================================
BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2608 [inline]
BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x1a9c/0x5af0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705
Write of size 1440 at addr ffffc9000d0ffda0 by task vivid-000-vid-c/5304

CPU: 0 UID: 0 PID: 5304 Comm: vivid-000-vid-c Not tainted 6.14.0-rc2-syzkaller-00039-g09fbf3d50205 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
 tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2608 [inline]
 tpg_fill_plane_buffer+0x1a9c/0x5af0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705
 vivid_fillbuff drivers/media/test-drivers/vivid/vivid-kthread-cap.c:470 [inline]
 vivid_thread_vid_cap_tick+0xf8e/0x60d0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629
 vivid_thread_vid_cap+0x8aa/0xf30 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:767
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc9000d0e9000, ffffc9000d101000) created by:
 vb2_vmalloc_alloc+0xf2/0x340 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x43e47
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 5303, tgid 5303 (syz-executor881), ts 69776556067, free_ts 68046210271
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739
 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
 alloc_frozen_pages_noprof mm/mempolicy.c:2341 [inline]
 alloc_pages_noprof+0x121/0x190 mm/mempolicy.c:2361
 vm_area_alloc_pages mm/vmalloc.c:3591 [inline]
 __vmalloc_area_node mm/vmalloc.c:3669 [inline]
 __vmalloc_node_range_noprof+0x9c6/0x1380 mm/vmalloc.c:3846
 vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:4000
 vb2_vmalloc_alloc+0xf2/0x340 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47
 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:242 [inline]
 __vb2_queue_alloc+0xa0b/0x16f0 drivers/media/common/videobuf2/videobuf2-core.c:523
 vb2_core_reqbufs+0xd2e/0x17c0 drivers/media/common/videobuf2/videobuf2-core.c:964
 __vb2_init_fileio+0x319/0xf90 drivers/media/common/videobuf2/videobuf2-core.c:2895
 __vb2_perform_fileio+0x31a/0x17b0 drivers/media/common/videobuf2/videobuf2-core.c:3041
 vb2_fop_read+0x247/0x330 drivers/media/common/videobuf2/videobuf2-v4l2.c:1215
 v4l2_read+0x1a4/0x2c0 drivers/media/v4l2-core/v4l2-dev.c:316
 vfs_read+0x1f8/0xb40 fs/read_write.c:563
 ksys_read+0x18f/0x2b0 fs/read_write.c:708
page last free pid 5290 tgid 5290 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660
 discard_slab mm/slub.c:2684 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3153
 put_cpu_partial+0x17c/0x250 mm/slub.c:3228
 __slab_free+0x290/0x380 mm/slub.c:4479
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171
 vm_area_dup+0x27/0x290 kernel/fork.c:487
 __split_vma+0x1cb/0xc50 mm/vma.c:466
 vms_gather_munmap_vmas+0x2e6/0x1600 mm/vma.c:1268
 do_vmi_align_munmap+0x3ff/0x6f0 mm/vma.c:1436
 do_vmi_munmap+0x24e/0x2d0 mm/vma.c:1493
 __vm_munmap+0x372/0x510 mm/vma.c:2951
 __do_sys_munmap mm/mmap.c:1084 [inline]
 __se_sys_munmap mm/mmap.c:1081 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:1081
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83

Memory state around the buggy address:
 ffffc9000d0fff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000d0fff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000d100000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                   ^
 ffffc9000d100080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc9000d100100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================

Crashes (271):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/12 09:11 upstream 09fbf3d50205 f2baddf5 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/07/06 09:01 upstream 05df91921da6 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/07/04 18:52 upstream 4c06e63b9203 d869b261 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/07/04 17:20 upstream 4c06e63b9203 76ad128c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/07/02 03:00 upstream 66701750d556 ffe4b334 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/29 15:29 upstream dfba48a70cb6 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/25 14:17 upstream 7595b66ae9de 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/25 03:07 upstream 7595b66ae9de 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/20 11:36 upstream 75f5f23f8787 ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/20 01:32 upstream 5c8013ae2e86 ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/19 10:45 upstream fb4d33ab452e ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/19 09:41 upstream fb4d33ab452e ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/18 12:01 upstream 52da431bf03b ca631f70 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/12 09:13 upstream 488ef3560196 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/11 07:40 upstream aef17cb3d3c4 5d7e17ca .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/10 08:40 upstream f09079bd04a9 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/08 11:11 upstream 8630c59e9936 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/07 20:07 upstream 5b032cac6225 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/03 19:20 upstream 546b1c9e93c2 a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/29 10:22 upstream 90b83efa6701 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/28 19:16 upstream feacb1774bd5 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/28 04:57 upstream 015a99fa7665 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/27 08:30 upstream 914873bc7df9 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/26 20:34 upstream 0ff41df1cb26 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/26 13:48 upstream 0f8c0258bf04 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/25 23:59 upstream 0f8c0258bf04 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/25 02:41 upstream b1427432d3b6 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/24 08:59 upstream 4856ebd99715 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/24 04:55 upstream 4856ebd99715 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/23 18:03 upstream eccf6f2f6ab9 f8cc0c83 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/22 13:17 upstream d608703fcdd9 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/22 10:53 upstream d608703fcdd9 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/22 05:17 upstream d608703fcdd9 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/22 00:30 upstream 4a95bc121ccd 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/03/06 13:38 upstream 848e07631744 831e3629 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2024/07/13 05:33 upstream e091caf99f3a eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/22 14:41 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/05 03:26 upstream 1af80d00e1e0 fd5e6e61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/26 16:53 upstream 0ff41df1cb26 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/26 12:16 upstream 0f8c0258bf04 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/26 01:31 upstream 0f8c0258bf04 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/25 11:04 upstream d0c22de9995b ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/24 06:51 upstream 4856ebd99715 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/23 19:33 upstream eccf6f2f6ab9 f8cc0c83 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/23 15:48 upstream 94305e83eccb f8cc0c83 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/06/06 13:50 upstream e271ed52b344 3d899f2c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/29 17:39 upstream 90b83efa6701 3d2f584d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/28 23:22 upstream feacb1774bd5 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/28 14:00 upstream c89756bcf406 874a1386 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/24 20:24 upstream 4856ebd99715 ed351ea7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/23 07:18 upstream 5cdb2c77c4c3 fa44301a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/07/01 18:36 upstream 66701750d556 091a06cd .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/23 23:38 upstream 4856ebd99715 ed351ea7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/30 16:21 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci d7fa1af5b33e 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer
2025/05/06 22:23 upstream 0d8d44db295c ae98e6b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: vmalloc-out-of-bounds Read in tpg_fill_plane_buffer
* Struck through repros no longer work on HEAD.