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BUG: KASAN: use-after-free in snd_card_do_free sound/core/init.c:612 [inline]
BUG: KASAN: use-after-free in release_card_device+0x188/0x198 sound/core/init.c:145
Read of size 1 at addr ffff0000d56ccd99 by task syz.3.18/4490

CPU: 0 PID: 4490 Comm: syz.3.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0xfc mm/kasan/report.c:524
 __asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348
 snd_card_do_free sound/core/init.c:612 [inline]
 release_card_device+0x188/0x198 sound/core/init.c:145
 device_release+0x94/0x1b4 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:681 [inline]
 kobject_release lib/kobject.c:712 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x2a8/0x41c lib/kobject.c:729
 put_device+0x28/0x40 drivers/base/core.c:3820
 snd_card_file_remove+0x2e4/0x340 sound/core/init.c:1147
 snd_pcm_release+0x120/0x14c sound/core/pcm_native.c:2939
 snd_disconnect_release+0x224/0x298 sound/core/init.c:438
 __fput+0x1b4/0x7b0 fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:348
 task_work_run+0x1f4/0x280 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x54c/0x19ac kernel/exit.c:887
 __do_sys_exit kernel/exit.c:997 [inline]
 __se_sys_exit kernel/exit.c:995 [inline]
 do_group_exit+0x0/0x238 kernel/exit.c:995
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 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

The buggy address belongs to the physical page:
page:0000000006b8df6e refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1156cc
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffc0003449208 ffff00019f39b0b0 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000d56ccc80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000d56ccd00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff0000d56ccd80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                            ^
 ffff0000d56cce00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000d56cce80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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