------------[ cut here ]------------ sysfs group 'power' not found for kobject 'xc3028-v27.fw' WARNING: CPU: 0 PID: 5462 at fs/sysfs/group.c:280 sysfs_remove_group+0x174/0x288 fs/sysfs/group.c:278 Modules linked in: CPU: 0 PID: 5462 Comm: kworker/0:9 Not tainted 6.1.101-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: events request_firmware_work_func pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : sysfs_remove_group+0x174/0x288 fs/sysfs/group.c:278 lr : sysfs_remove_group+0x174/0x288 fs/sysfs/group.c:278 sp : ffff80001e8376a0 x29: ffff80001e8376a0 x28: 1fffe00019edf6f5 x27: dfff800000000000 x26: ffff80001e837760 x25: 1fffe0001e1fa60a x24: 1ffff00002657f50 x23: dfff800000000000 x22: ffff0000f0fd3068 x21: ffff0000f0fd3008 x20: ffff0000ef8160e8 x19: ffff8000132bfa60 x18: 1fffe00036864576 x17: ffff8000159bd000 x16: ffff800008305538 x15: ffff0001b4322bbc x14: 1ffff00002b380b0 x13: dfff800000000000 x12: 0000000000000003 x11: 0000000000ff0100 x10: 0000000000000003 x9 : ee8b2ab772382900 x8 : ee8b2ab772382900 x7 : ffff80000827cf40 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000007 x1 : ffff8000123dc6e0 x0 : ffff80019ea0f000 Call trace: sysfs_remove_group+0x174/0x288 fs/sysfs/group.c:278 dpm_sysfs_remove+0xa4/0xd4 drivers/base/power/sysfs.c:837 device_del+0x268/0x9bc drivers/base/core.c:3854 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:120 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:158 [inline] firmware_fallback_sysfs+0x5c4/0x8b8 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xccc/0xf4c drivers/base/firmware_loader/main.c:856 request_firmware_work_func+0xfc/0x214 drivers/base/firmware_loader/main.c:1105 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 irq event stamp: 96076 hardirqs last enabled at (96075): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (96075): [] finish_lock_switch+0xbc/0x1e8 kernel/sched/core.c:5003 hardirqs last disabled at (96076): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (95862): [] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (95862): [] handle_softirqs+0xb84/0xd58 kernel/softirq.c:599 softirqs last disabled at (95855): [] __do_softirq+0x14/0x20 kernel/softirq.c:605 ---[ end trace 0000000000000000 ]--- ================================================================== BUG: KASAN: use-after-free in load_firmware_cb+0x9c/0x1618 drivers/media/tuners/xc2028.c:1364 Read of size 8 at addr ffff0000f0fd0318 by task kworker/0:9/5462 CPU: 0 PID: 5462 Comm: kworker/0:9 Tainted: G W 6.1.101-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 8772: 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] rtnl_newlink+0xe8/0x1b74 net/core/rtnetlink.c:3619 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6121 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2508 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6139 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline] netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1352 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1874 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] __sys_sendto+0x3b8/0x508 net/socket.c:2148 __do_sys_sendto net/socket.c:2160 [inline] __se_sys_sendto net/socket.c:2156 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2156 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 call_rcu+0xfc/0xa40 kernel/rcu/tree.c:2844 netlink_release+0x11d0/0x16e0 net/netlink/af_netlink.c:815 __sock_release net/socket.c:654 [inline] sock_close+0xb8/0x1fc net/socket.c:1400 __fput+0x1c8/0x7c8 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x240/0x2f0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2148/0x3474 arch/arm64/kernel/signal.c:1132 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Second to last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 call_rcu+0xfc/0xa40 kernel/rcu/tree.c:2844 netlink_release+0x11d0/0x16e0 net/netlink/af_netlink.c:815 __sock_release net/socket.c:654 [inline] sock_close+0xb8/0x1fc net/socket.c:1400 __fput+0x1c8/0x7c8 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x240/0x2f0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2148/0x3474 arch/arm64/kernel/signal.c:1132 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the object at ffff0000f0fd0000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 792 bytes inside of 2048-byte region [ffff0000f0fd0000, ffff0000f0fd0800) The buggy address belongs to the physical page: page:0000000019a3e224 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000f0fd0000 pfn:0x130fd0 head:0000000019a3e224 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 fffffc0003c97008 fffffc00035c2c08 ffff0000c0002900 raw: ffff0000f0fd0000 0000000000080001 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f0fd0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000f0fd0280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000f0fd0300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000f0fd0380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000f0fd0400: 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: 5462 Comm: kworker/0:9 Tainted: G B W 6.1.101-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 : ffff80001e8378c0 x29: ffff80001e837a20 x28: 0000000000000000 x27: ffff700003d06f30 x26: 0000000000000000 x25: 1ffff00003d06f54 x24: 1fffe0001e1fa063 x23: ffff80001e837980 x22: dfff800000000000 x21: ffff0000f2addc60 x20: dfff800000000000 x19: ffff0000f0fd0318 x18: 1fffe00036864576 x17: ffff8000159bd000 x16: ffff800012285134 x15: ffff0001b4322bbc x14: ffff0001b4322bb8 x13: 1fffe00036864576 x12: 0000000000000001 x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff80000e5eb144 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