kobject_add_internal failed for firmware (error: -2 parent: 1-1:0.0) firmware xc3028-v27.fw: fw_load_sysfs_fallback: device_register failed ================================================================== BUG: KASAN: use-after-free in load_firmware_cb+0x9c/0x1618 drivers/media/tuners/xc2028.c:1364 Read of size 8 at addr ffff0000d9443318 by task kworker/0:10/4510 CPU: 0 PID: 4510 Comm: kworker/0:10 Not tainted 6.1.102-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: events request_firmware_work_func Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x174/0x4c0 mm/kasan/report.c:395 kasan_report+0xd4/0x130 mm/kasan/report.c:495 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351 load_firmware_cb+0x9c/0x1618 drivers/media/tuners/xc2028.c:1364 request_firmware_work_func+0x150/0x214 drivers/base/firmware_loader/main.c:1107 process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 Allocated by task 4510: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] kmalloc_trace+0x7c/0x94 mm/slab_common.c:1050 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:692 [inline] tuner_probe+0x108/0x1788 drivers/media/v4l2-core/tuner-core.c:638 i2c_device_probe+0x6a8/0x94c drivers/i2c/i2c-core-base.c:568 really_probe+0x394/0xacc drivers/base/dd.c:639 __driver_probe_device+0x194/0x3b4 drivers/base/dd.c:785 driver_probe_device+0x78/0x330 drivers/base/dd.c:815 __device_attach_driver+0x2a8/0x4f4 drivers/base/dd.c:943 bus_for_each_drv+0x158/0x1e0 drivers/base/bus.c:427 __device_attach+0x2f0/0x480 drivers/base/dd.c:1015 device_initial_probe+0x24/0x34 drivers/base/dd.c:1064 bus_probe_device+0xbc/0x1c8 drivers/base/bus.c:487 device_add+0xae0/0xef4 drivers/base/core.c:3689 device_register+0x28/0x38 drivers/base/core.c:3771 i2c_new_client_device+0x7d4/0xc00 drivers/i2c/i2c-core-base.c:971 v4l2_i2c_new_subdev_board+0xb0/0x20c drivers/media/v4l2-core/v4l2-i2c.c:80 v4l2_i2c_new_subdev+0xe4/0x150 drivers/media/v4l2-core/v4l2-i2c.c:135 em28xx_v4l2_init+0x6c8/0x28d4 drivers/media/usb/em28xx/em28xx-video.c:2617 em28xx_init_extension+0x10c/0x1b4 drivers/media/usb/em28xx/em28xx-core.c:1116 request_module_async+0x68/0x98 drivers/media/usb/em28xx/em28xx-cards.c:3405 process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292 process_scheduled_works kernel/workqueue.c:2355 [inline] worker_thread+0xb20/0xfec kernel/workqueue.c:2444 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 Freed by task 4510: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x2c0/0x4b4 mm/slub.c:3674 kfree+0xcc/0x1b8 mm/slab_common.c:1007 tuner_remove+0x1d8/0x1f4 drivers/media/v4l2-core/tuner-core.c:791 i2c_device_remove+0x8c/0x1c0 drivers/i2c/i2c-core-base.c:609 device_remove drivers/base/dd.c:548 [inline] __device_release_driver drivers/base/dd.c:1260 [inline] device_release_driver_internal+0x42c/0x724 drivers/base/dd.c:1286 device_release_driver+0x28/0x38 drivers/base/dd.c:1309 bus_remove_device+0x298/0x38c drivers/base/bus.c:529 device_del+0x57c/0x9bc drivers/base/core.c:3877 device_unregister+0x2c/0xcc drivers/base/core.c:3920 i2c_unregister_device+0x118/0x170 drivers/i2c/i2c-core-base.c:1016 v4l2_i2c_subdev_unregister+0xa8/0xbc drivers/media/v4l2-core/v4l2-i2c.c:28 v4l2_device_unregister+0x17c/0x248 drivers/media/v4l2-core/v4l2-device.c:102 em28xx_v4l2_init+0x1300/0x28d4 drivers/media/usb/em28xx/em28xx-video.c:2898 em28xx_init_extension+0x10c/0x1b4 drivers/media/usb/em28xx/em28xx-core.c:1116 request_module_async+0x68/0x98 drivers/media/usb/em28xx/em28xx-cards.c:3405 process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292 process_scheduled_works kernel/workqueue.c:2355 [inline] worker_thread+0xb20/0xfec kernel/workqueue.c:2444 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 The buggy address belongs to the object at ffff0000d9443000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 792 bytes inside of 2048-byte region [ffff0000d9443000, ffff0000d9443800) The buggy address belongs to the physical page: page:0000000049e6384c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x119440 head:0000000049e6384c order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002900 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d9443200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d9443280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000d9443300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000d9443380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d9443400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Unable to handle kernel paging request at virtual address dfff800000000005 KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000005] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4510 Comm: kworker/0:10 Tainted: G B 6.1.102-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: events request_firmware_work_func pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : load_firmware_cb+0x188/0x1618 drivers/media/tuners/xc2028.c:1369 lr : load_firmware_cb+0xbc/0x1618 drivers/media/tuners/xc2028.c:1367 sp : ffff80001e3378c0 x29: ffff80001e337a20 x28: 0000000000000000 x27: ffff700003c66f30 x26: 0000000000000000 x25: 1ffff00003c66f54 x24: 1fffe0001b288663 x23: ffff80001e337980 x22: dfff800000000000 x21: ffff0000ef711b60 x20: dfff800000000000 x19: ffff0000d9443318 x18: 1fffe00036864576 x17: ffff8000159bd000 x16: ffff8000122835b4 x15: ffff0001b4322bbc x14: ffff0001b4322bb8 x13: 1fffe00036864576 x12: 0000000000000001 x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff80000e5ea464 x8 : 0000000000000005 x7 : 1fffe00036864577 x6 : ffff80000827cf40 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000081ae3ac x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000028 Call trace: load_firmware_cb+0x188/0x1618 drivers/media/tuners/xc2028.c:1369 request_firmware_work_func+0x150/0x214 drivers/base/firmware_loader/main.c:1107 process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 Code: 9100a380 d2d00016 d343fc08 f2fbfff6 (38746908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 9100a380 add x0, x28, #0x28 4: d2d00016 mov x22, #0x800000000000 // #140737488355328 8: d343fc08 lsr x8, x0, #3 c: f2fbfff6 movk x22, #0xdfff, lsl #48 * 10: 38746908 ldrb w8, [x8, x20] <-- trapping instruction