CVE-2025-38226

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> media: vivid: Change the siize of the composing<br /> <br /> syzkaller found a bug:<br /> <br /> BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2608 [inline]<br /> BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x1a9c/0x5af0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705<br /> Write of size 1440 at addr ffffc9000d0ffda0 by task vivid-000-vid-c/5304<br /> <br /> CPU: 0 UID: 0 PID: 5304 Comm: vivid-000-vid-c Not tainted 6.14.0-rc2-syzkaller-00039-g09fbf3d50205 #0<br /> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014<br /> <br /> Call Trace:<br /> <br /> __dump_stack lib/dump_stack.c:94 [inline]<br /> dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120<br /> print_address_description mm/kasan/report.c:378 [inline]<br /> print_report+0x169/0x550 mm/kasan/report.c:489<br /> kasan_report+0x143/0x180 mm/kasan/report.c:602<br /> kasan_check_range+0x282/0x290 mm/kasan/generic.c:189<br /> __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106<br /> tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2608 [inline]<br /> tpg_fill_plane_buffer+0x1a9c/0x5af0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705<br /> vivid_fillbuff drivers/media/test-drivers/vivid/vivid-kthread-cap.c:470 [inline]<br /> vivid_thread_vid_cap_tick+0xf8e/0x60d0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629<br /> vivid_thread_vid_cap+0x8aa/0xf30 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:767<br /> kthread+0x7a9/0x920 kernel/kthread.c:464<br /> ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148<br /> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244<br /> <br /> <br /> The composition size cannot be larger than the size of fmt_cap_rect.<br /> So execute v4l2_rect_map_inside() even if has_compose_cap == 0.