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with SMTP id 006d021491bc7-6ae96e82cabmr5889529eaf.18.1785969998392; Wed, 05 Aug 2026 15:46:38 -0700 (PDT) Date: Wed, 05 Aug 2026 15:46:38 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a73bd4e.01d0871a.3a0d52.0007.GAE@google.com> Subject: [syzbot] [media?] KASAN: slab-out-of-bounds Read in dw210x_op_rw From: syzbot To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 848acc8ffe1b Merge tag 'fsverity-for-linus' of git://git.k.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1655fc9e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4e38b15c29e6a1d9 dashboard link: https://syzkaller.appspot.com/bug?extid=f408eac9faa61d5a1927 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17167e32580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1427acc6580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/9bf3ffd710de/disk-848acc8f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/770c0a63a80c/vmlinux-848acc8f.xz kernel image: https://storage.googleapis.com/syzbot-assets/c54f9393cb03/bzImage-848acc8f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f408eac9faa61d5a1927@syzkaller.appspotmail.com dvb-usb: downloading firmware from file 'dvb-usb-dw3101.fw' dw2102: start downloading DW210X firmware ================================================================== BUG: KASAN: slab-out-of-bounds in dw210x_op_rw+0xb6/0x180 drivers/media/usb/dvb-usb/dw2102.c:102 Read of size 64 at addr ffff88802bcf2ba0 by task kworker/1:2/803 CPU: 1 UID: 0 PID: 803 Comm: kworker/1:2 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Workqueue: usb_hub_wq hub_event Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 dw210x_op_rw+0xb6/0x180 drivers/media/usb/dvb-usb/dw2102.c:102 dw2102_load_firmware+0x2b4/0x970 drivers/media/usb/dvb-usb/dw2102.c:1906 dvb_usb_download_firmware+0x1c3/0x270 drivers/media/usb/dvb-usb/dvb-usb-firmware.c:109 dvb_usb_device_init+0xddf/0x2570 drivers/media/usb/dvb-usb/dvb-usb-init.c:298 dw2102_probe+0x8a/0x270 drivers/media/usb/dvb-usb/dw2102.c:2594 usb_probe_interface+0x653/0xc60 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3772 usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3772 usb_new_device+0x99d/0x1620 drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x28e8/0x4d30 drivers/usb/core/hub.c:5953 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 803: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5334 [inline] __kmalloc_noprof+0x375/0x720 mm/slub.c:5359 _kmalloc_noprof include/linux/slab.h:992 [inline] dw2102_load_firmware+0x175/0x970 drivers/media/usb/dvb-usb/dw2102.c:1896 dvb_usb_download_firmware+0x1c3/0x270 drivers/media/usb/dvb-usb/dvb-usb-firmware.c:109 dvb_usb_device_init+0xddf/0x2570 drivers/media/usb/dvb-usb/dvb-usb-init.c:298 dw2102_probe+0x8a/0x270 drivers/media/usb/dvb-usb/dw2102.c:2594 usb_probe_interface+0x653/0xc60 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3772 usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3772 usb_new_device+0x99d/0x1620 drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x28e8/0x4d30 drivers/usb/core/hub.c:5953 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff88802bcf2ba0 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 0 bytes inside of allocated 16-byte region [ffff88802bcf2ba0, ffff88802bcf2bb0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802bcf2600 pfn:0x2bcf2 flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000200 ffff88801b001640 ffff88801b000408 ffffea0000af2d50 raw: ffff88802bcf2600 000000080080007a 00000000f5000000 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 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 16259999448, free_ts 0 create_dummy_stack mm/page_owner.c:103 [inline] register_dummy_stack+0x98/0x100 mm/page_owner.c:109 init_page_owner+0x2e/0x5f0 mm/page_owner.c:127 invoke_init_callbacks mm/page_ext.c:152 [inline] page_ext_init+0x509/0x550 mm/page_ext.c:490 mm_core_init+0x97/0xb0 mm/mm_init.c:2748 page_owner free stack trace missing Memory state around the buggy address: ffff88802bcf2a80: 00 00 fc fc fa fb fc fc 00 01 fc fc 00 01 fc fc ffff88802bcf2b00: 00 01 fc fc 00 04 fc fc 00 04 fc fc 00 04 fc fc >ffff88802bcf2b80: 00 04 fc fc 00 00 fc fc 00 00 fc fc fa fb fc fc ^ ffff88802bcf2c00: 00 00 fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc ffff88802bcf2c80: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc ================================================================== --- This report is generated by a bot. 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