==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:352 [inline]
BUG: KASAN: slab-out-of-bounds in default_write_copy_kernel+0xcf/0x160 sound/core/pcm_lib.c:1946
Read of size 64 at addr ffff88005bd47840 by task syz-executor4/7844
 __should_failslab+0xba/0xf0 mm/failslab.c:32

 should_failslab+0x9/0x14 mm/slab_common.c:1578
 slab_pre_alloc_hook mm/slab.h:423 [inline]
 slab_alloc mm/slab.c:3378 [inline]
 kmem_cache_alloc_trace+0x2d7/0x750 mm/slab.c:3618
 kmalloc include/linux/slab.h:546 [inline]
 snd_pcm_hw_param_near.constprop.35+0x14f/0xa40 sound/core/oss/pcm_oss.c:415
 snd_pcm_oss_change_params_locked+0xab5/0x3570 sound/core/oss/pcm_oss.c:891
 snd_pcm_oss_make_ready_locked+0x82/0xf0 sound/core/oss/pcm_oss.c:1183
 snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1397 [inline]
 snd_pcm_oss_write+0x40e/0x900 sound/core/oss/pcm_oss.c:2775
 __vfs_write+0xe6/0xc30 fs/read_write.c:485
 vfs_write+0x150/0x4d0 fs/read_write.c:549
 ksys_write+0xf5/0x250 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x6e/0xb0 fs/read_write.c:607
 do_syscall_64+0x183/0x700 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456fc9
Code: 5d af fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b af fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fce69435c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000071bf00 RCX: 0000000000456fc9
RDX: 0000000056da83a0 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007fce69435ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fce694366d4
R13: 00000000004acb8e R14: 00000000006ec570 R15: 0000000000000005
CPU: 0 PID: 7844 Comm: syz-executor4 Not tainted 4.20.0-rc1+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1cc/0x2f4 lib/dump_stack.c:113
 print_address_description.cold.7+0x9/0x1ff mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267
 memcpy+0x23/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:352 [inline]
 default_write_copy_kernel+0xcf/0x160 sound/core/pcm_lib.c:1946
 interleaved_copy+0xb7/0x130 sound/core/pcm_lib.c:2007
 __snd_pcm_lib_xfer+0xfad/0x2039 sound/core/pcm_lib.c:2227
 snd_pcm_oss_write3+0xd0/0x190 sound/core/oss/pcm_oss.c:1237
 io_playback_transfer+0x1da/0x2d0 sound/core/oss/io.c:47
 snd_pcm_plug_write_transfer+0x2c6/0x420 sound/core/oss/pcm_plugin.c:620
 snd_pcm_oss_write2+0x223/0x450 sound/core/oss/pcm_oss.c:1366
 snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1432 [inline]
 snd_pcm_oss_write+0x442/0x900 sound/core/oss/pcm_oss.c:2775
 __vfs_write+0xe6/0xc30 fs/read_write.c:485
 vfs_write+0x150/0x4d0 fs/read_write.c:549
 ksys_write+0xf5/0x250 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x6e/0xb0 fs/read_write.c:607
 do_syscall_64+0x183/0x700 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456fc9
Code: 5d af fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b af fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f9f8b402c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000071bf00 RCX: 0000000000456fc9
RDX: 0000000056da83a0 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007f9f8b402ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9f8b4036d4
R13: 00000000004acb8e R14: 00000000006ec570 R15: 0000000000000005

Allocated by task 7844:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553
 __do_kmalloc_node mm/slab.c:3684 [inline]
 __kmalloc_node+0x50/0x70 mm/slab.c:3691
 kmalloc_node include/linux/slab.h:589 [inline]
 kvmalloc_node+0x68/0x70 mm/util.c:416
 kvmalloc include/linux/mm.h:577 [inline]
 kvzalloc include/linux/mm.h:585 [inline]
 snd_pcm_plugin_alloc+0x445/0x8d0 sound/core/oss/pcm_plugin.c:70
 snd_pcm_plug_alloc+0x18e/0x280 sound/core/oss/pcm_plugin.c:117
 snd_pcm_oss_change_params_locked+0x1d99/0x3570 sound/core/oss/pcm_oss.c:1038
 snd_pcm_oss_make_ready_locked+0x82/0xf0 sound/core/oss/pcm_oss.c:1183
 snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1397 [inline]
 snd_pcm_oss_write+0x40e/0x900 sound/core/oss/pcm_oss.c:2775
 __vfs_write+0xe6/0xc30 fs/read_write.c:485
 vfs_write+0x150/0x4d0 fs/read_write.c:549
 ksys_write+0xf5/0x250 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x6e/0xb0 fs/read_write.c:607
 do_syscall_64+0x183/0x700 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 9:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kfree+0xcf/0x230 mm/slab.c:3817
 apparmor_sk_free_security+0xa3/0xf0 security/apparmor/lsm.c:790
 security_sk_free+0x40/0x70 security/security.c:1482
 sk_prot_free net/core/sock.c:1502 [inline]
 __sk_destruct+0x637/0xa00 net/core/sock.c:1588
 sk_destruct+0x49/0x60 net/core/sock.c:1596
 __sk_free+0x9e/0x230 net/core/sock.c:1607
 sk_free+0x23/0x30 net/core/sock.c:1618
 deferred_put_nlk_sk+0x134/0x320 net/netlink/af_netlink.c:738
 __rcu_reclaim kernel/rcu/rcu.h:240 [inline]
 rcu_do_batch kernel/rcu/tree.c:2437 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2716 [inline]
 rcu_process_callbacks+0x100a/0x1ac0 kernel/rcu/tree.c:2697
 __do_softirq+0x308/0xb7e kernel/softirq.c:292

The buggy address belongs to the object at ffff88005bd47840
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
 32-byte region [ffff88005bd47840, ffff88005bd47860)
The buggy address belongs to the page:
page:ffffea00016f51c0 count:1 mapcount:0 mapping:ffff88006c0001c0 index:0xffff88005bd47fc1
flags: 0x1fffc0000000200(slab)
raw: 01fffc0000000200 ffffea0001a65a08 ffffea00016ae788 ffff88006c0001c0
raw: ffff88005bd47fc1 ffff88005bd47000 000000010000003f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88005bd47700: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88005bd47780: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff88005bd47800: fb fb fb fb fc fc fc fc 00 00 00 00 fc fc fc fc
                                                       ^
 ffff88005bd47880: 00 00 00 00 fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88005bd47900: fb fb fb fb fc fc fc fc 00 07 fc fc fc fc fc fc
==================================================================