kobject: 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: slab-use-after-free in load_firmware_cb+0xbc/0x1638 drivers/media/tuners/xc2028.c:1372
Read of size 8 at addr ffff0000ceca5318 by task kworker/0:6/6505
CPU: 0 UID: 0 PID: 6505 Comm: kworker/0:6 Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events request_firmware_work_func
Call trace:
dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:319
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:326
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:119
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x198/0x538 mm/kasan/report.c:488
kasan_report+0xd8/0x138 mm/kasan/report.c:601
__asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381
load_firmware_cb+0xbc/0x1638 drivers/media/tuners/xc2028.c:1372
request_firmware_work_func+0x150/0x214 drivers/base/firmware_loader/main.c:1167
process_one_work+0x79c/0x15b8 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x978/0xec4 kernel/workqueue.c:3389
kthread+0x288/0x310 kernel/kthread.c:389
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
Allocated by task 6505:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x40/0x78 mm/kasan/common.c:68
kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:565
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
__kmalloc_cache_noprof+0x244/0x374 mm/slub.c:4193
kmalloc_noprof include/linux/slab.h:681 [inline]
kzalloc_noprof include/linux/slab.h:807 [inline]
tuner_probe+0x108/0x1788 drivers/media/v4l2-core/tuner-core.c:636
i2c_device_probe+0x640/0x8f8 drivers/i2c/i2c-core-base.c:587
really_probe+0x38c/0x8fc drivers/base/dd.c:657
__driver_probe_device+0x194/0x374 drivers/base/dd.c:799
driver_probe_device+0x78/0x330 drivers/base/dd.c:829
__device_attach_driver+0x2a8/0x4f4 drivers/base/dd.c:957
bus_for_each_drv+0x228/0x2bc drivers/base/bus.c:457
__device_attach+0x2b4/0x434 drivers/base/dd.c:1029
device_initial_probe+0x24/0x34 drivers/base/dd.c:1078
bus_probe_device+0x178/0x240 drivers/base/bus.c:532
device_add+0x728/0xa6c drivers/base/core.c:3682
device_register+0x28/0x38 drivers/base/core.c:3764
i2c_new_client_device+0x7d8/0xc3c drivers/i2c/i2c-core-base.c:989
v4l2_i2c_new_subdev_board+0xb0/0x224 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:2619
em28xx_init_extension+0x10c/0x1b4 drivers/media/usb/em28xx/em28xx-core.c:1117
request_module_async+0x68/0x98 drivers/media/usb/em28xx/em28xx-cards.c:3457
process_one_work+0x79c/0x15b8 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x978/0xec4 kernel/workqueue.c:3389
kthread+0x288/0x310 kernel/kthread.c:389
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
Freed by task 6505:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x40/0x78 mm/kasan/common.c:68
kasan_save_free_info+0x54/0x6c mm/kasan/generic.c:579
poison_slab_object+0x128/0x180 mm/kasan/common.c:240
__kasan_slab_free+0x3c/0x70 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2256 [inline]
slab_free mm/slub.c:4477 [inline]
kfree+0x154/0x3e0 mm/slub.c:4598
tuner_remove+0x1d8/0x1f4 drivers/media/v4l2-core/tuner-core.c:789
i2c_device_remove+0x8c/0x1c0 drivers/i2c/i2c-core-base.c:627
device_remove drivers/base/dd.c:566 [inline]
__device_release_driver drivers/base/dd.c:1272 [inline]
device_release_driver_internal+0x3e4/0x698 drivers/base/dd.c:1295
device_release_driver+0x28/0x38 drivers/base/dd.c:1318
bus_remove_device+0x314/0x3b4 drivers/base/bus.c:574
device_del+0x480/0x828 drivers/base/core.c:3871
device_unregister+0x2c/0xcc drivers/base/core.c:3912
i2c_unregister_device+0x130/0x190 drivers/i2c/i2c-core-base.c:1034
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:2900
em28xx_init_extension+0x10c/0x1b4 drivers/media/usb/em28xx/em28xx-core.c:1117
request_module_async+0x68/0x98 drivers/media/usb/em28xx/em28xx-cards.c:3457
process_one_work+0x79c/0x15b8 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x978/0xec4 kernel/workqueue.c:3389
kthread+0x288/0x310 kernel/kthread.c:389
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
The buggy address belongs to the object at ffff0000ceca5000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 792 bytes inside of
freed 2048-byte region [ffff0000ceca5000, ffff0000ceca5800)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10eca0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 05ffc00000000040 ffff0000c0002000 0000000000000000 dead000000000001
raw: 0000000000000000 0000000080080008 00000001fdffffff 0000000000000000
head: 05ffc00000000040 ffff0000c0002000 0000000000000000 dead000000000001
head: 0000000000000000 0000000080080008 00000001fdffffff 0000000000000000
head: 05ffc00000000003 fffffdffc33b2801 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000ceca5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff0000ceca5280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000ceca5300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff0000ceca5380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff0000ceca5400: 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 = 0x0000000096000005
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x05: level 1 translation fault
Data abort info:
ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
CM = 0, WnR = 0, TnD = 0, TagAccess = 0
GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff800000000005] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6505 Comm: kworker/0:6 Tainted: G B 6.11.0-rc7-syzkaller-g5f5673607153 #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events request_firmware_work_func
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : load_firmware_cb+0x1a8/0x1638 drivers/media/tuners/xc2028.c:1376
lr : load_firmware_cb+0xdc/0x1638 drivers/media/tuners/xc2028.c:1374
sp : ffff8000a35d7880
x29: ffff8000a35d79e0 x28: 0000000000000000 x27: ffff7000146baf28
x26: 0000000000000000 x25: 1ffff000146baf4c x24: 1fffe00019d94a63
x23: ffff8000a35d7940 x22: dfff800000000000 x21: ffff0000e01d9660
x20: dfff800000000000 x19: ffff0000ceca5318 x18: 1fffe000366d31ee
x17: ffff80008f56d000 x16: ffff80008b339a14 x15: 0000000000000001
x14: 1ffff00012543a94 x13: 0000000000000000 x12: 0000000000000000
x11: ffff700012543a95 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 0000000000000005 x7 : 1fffe000366d31ef x6 : ffff8000802b7e24
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000801dfd40
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000028
Call trace:
load_firmware_cb+0x1a8/0x1638 drivers/media/tuners/xc2028.c:1376
request_firmware_work_func+0x150/0x214 drivers/base/firmware_loader/main.c:1167
process_one_work+0x79c/0x15b8 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x978/0xec4 kernel/workqueue.c:3389
kthread+0x288/0x310 kernel/kthread.c:389
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
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