[syzbot] [media?] KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer (3)

[syzbot] [media?] KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer (3)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    e091caf99f3a Merge tag 'arm-fixes-6.10-3' of git://git.ker..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1547d131980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b63b35269462a0e0
dashboard link: https://syzkaller.appspot.com/bug?extid=365005005522b70a36f2
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7fdef776dda5/disk-e091caf9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/40515092c306/vmlinux-e091caf9.xz
kernel image: https://storage.googleapis.com/syzbot-assets/61ceae9ea0d8/bzImage-e091caf9.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+365005005522b70a36f2@syzkaller.appspotmail.com

==================================================================
BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x1ad1/0x5af0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2702
Write of size 1280 at addr ffffc90004e27b40 by task vivid-000-vid-c/30900

CPU: 1 PID: 30900 Comm: vivid-000-vid-c Not tainted 6.10.0-rc7-syzkaller-00231-ge091caf99f3a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
 tpg_fill_plane_buffer+0x1ad1/0x5af0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2702
 vivid_fillbuff drivers/media/test-drivers/vivid/vivid-kthread-cap.c:449 [inline]
 vivid_thread_vid_cap_tick+0x1c84/0x5bd0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:605
 vivid_thread_vid_cap+0x8aa/0xf30 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:743
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc90004e25000, ffffc90004e29000) 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:0x8 pfn:0x230e1
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000008 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 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 30897, tgid 30893 (syz.0.5784), ts 1363420348526, free_ts 1363309065138
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1473
 prep_new_page mm/page_alloc.c:1481 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3425
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4683
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
 vm_area_alloc_pages mm/vmalloc.c:3583 [inline]
 __vmalloc_area_node mm/vmalloc.c:3659 [inline]
 __vmalloc_node_range_noprof+0x971/0x1460 mm/vmalloc.c:3840
 vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:3994
 vb2_vmalloc_alloc+0xf2/0x340 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47
 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:243 [inline]
 __vb2_queue_alloc+0xa0f/0x16f0 drivers/media/common/videobuf2/videobuf2-core.c:510
 vb2_core_reqbufs+0xd2e/0x17c0 drivers/media/common/videobuf2/videobuf2-core.c:951
 __vb2_init_fileio+0x319/0xf90 drivers/media/common/videobuf2/videobuf2-core.c:2855
 vb2_core_poll+0x46c/0x7b0 drivers/media/common/videobuf2/videobuf2-core.c:2689
 vb2_poll drivers/media/common/videobuf2/videobuf2-v4l2.c:980 [inline]
 vb2_fop_poll+0x170/0x360 drivers/media/common/videobuf2/videobuf2-v4l2.c:1245
 v4l2_poll+0x143/0x2c0 drivers/media/v4l2-core/v4l2-dev.c:348
 vfs_poll include/linux/poll.h:84 [inline]
 do_select+0xec6/0x1900 fs/select.c:538
 core_sys_select+0x6f4/0x910 fs/select.c:681
 do_pselect fs/select.c:763 [inline]
 __do_sys_pselect6 fs/select.c:804 [inline]
 __se_sys_pselect6+0x319/0x3f0 fs/select.c:795
page last free pid 30896 tgid 30896 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1093 [inline]
 free_unref_folios+0xf23/0x19e0 mm/page_alloc.c:2637
 folios_put_refs+0x93a/0xa60 mm/swap.c:1024
 free_pages_and_swap_cache+0x2ea/0x690 mm/swap_state.c:329
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
 tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465
 exit_mmap+0x44f/0xc80 mm/mmap.c:3354
 __mmput+0x115/0x3c0 kernel/fork.c:1346
 exec_mmap+0x680/0x710 fs/exec.c:1063
 begin_new_exec+0x125f/0x1f50 fs/exec.c:1329
 load_elf_binary+0x974/0x2620 fs/binfmt_elf.c:996
 search_binary_handler fs/exec.c:1797 [inline]
 exec_binprm fs/exec.c:1839 [inline]
 bprm_execve+0xaf8/0x17c0 fs/exec.c:1891
 do_execveat_common+0x553/0x700 fs/exec.c:1998
 do_execve fs/exec.c:2072 [inline]
 __do_sys_execve fs/exec.c:2148 [inline]
 __se_sys_execve fs/exec.c:2143 [inline]
 __x64_sys_execve+0x92/0xb0 fs/exec.c:2143
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffffc90004e27f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90004e27f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90004e28000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                   ^
 ffffc90004e28080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc90004e28100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================


---
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Re: [syzbot] [media?] KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer (3)

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    09fbf3d50205 Merge tag 'tomoyo-pr-20250211' of git://git.c..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=167e4718580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3c2347dd6174fbe2
dashboard link: https://syzkaller.appspot.com/bug?extid=365005005522b70a36f2
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15d28aa4580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1493a3f8580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-09fbf3d5.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/835b3d29c46c/vmlinux-09fbf3d5.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ff4bfd8a5d42/bzImage-09fbf3d5.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+365005005522b70a36f2@syzkaller.appspotmail.com

==================================================================
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
==================================================================


---
If you want syzbot to run the reproducer, reply with:
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