==================================================================
BUG: KASAN: use-after-free in __snd_rawmidi_transmit_peek sound/core/rawmidi.c:1286 [inline]
BUG: KASAN: use-after-free in snd_rawmidi_transmit+0x39a/0x410 sound/core/rawmidi.c:1411
Read of size 1 at addr ffff8880789ec07e by task syz-executor/5739
CPU: 0 PID: 5739 Comm: syz-executor Not tainted 5.15.163-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
__snd_rawmidi_transmit_peek sound/core/rawmidi.c:1286 [inline]
snd_rawmidi_transmit+0x39a/0x410 sound/core/rawmidi.c:1411
snd_usbmidi_standard_output+0x1eb/0xf20 sound/usb/midi.c:650
snd_usbmidi_do_output+0x206/0x520 sound/usb/midi.c:311
snd_usbmidi_error_timer+0x2a3/0x580 sound/usb/midi.c:362
call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
__do_softirq kernel/softirq.c:592 [inline]
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:641
irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:console_unlock+0xe53/0x12b0 kernel/printk/printk.c:2749
Code: 00 48 83 7c 24 18 00 75 19 e8 49 04 1a 00 eb 18 e8 42 04 1a 00 e8 9d 53 b8 08 48 83 7c 24 18 00 74 e7 e8 30 04 1a 00 fb 31 ff <44> 89 f6 e8 85 07 1a 00 31 db 45 85 f6 0f 95 c0 89 c1 0a 4c 24 17
RSP: 0018:ffffc90003056660 EFLAGS: 00000246
RAX: ffffffff816659e0 RBX: 0000000000000000 RCX: ffff88801c141dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900030568f0 R08: ffffffff816659ab R09: fffffbfff1f7f419
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff1a4b25e
R13: ffffffff8d259328 R14: 0000000000000000 R15: dffffc0000000000
vprintk_emit+0xbf/0x150 kernel/printk/printk.c:2274
_printk+0xd1/0x120 kernel/printk/printk.c:2299
batadv_check_known_mac_addr+0x296/0x3d0 net/batman-adv/hard-interface.c:524
batadv_hard_if_event+0x300/0x17a0 net/batman-adv/hard-interface.c:986
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
call_netdevice_notifiers net/core/dev.c:2044 [inline]
dev_set_mac_address+0x325/0x470 net/core/dev.c:9074
dev_set_mac_address_user+0x2d/0x50 net/core/dev.c:9088
do_setlink+0x897/0x3b00 net/core/rtnetlink.c:2696
__rtnl_newlink net/core/rtnetlink.c:3429 [inline]
rtnl_newlink+0x17a4/0x2070 net/core/rtnetlink.c:3549
rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5629
netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1352
netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1920
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
__sys_sendto+0x564/0x720 net/socket.c:2058
__do_sys_sendto net/socket.c:2070 [inline]
__se_sys_sendto net/socket.c:2066 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2066
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd64e67b8ec
Code: 2a 5a 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5a 02 00 48 8b
RSP: 002b:00007ffe79547eb0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fd64f338620 RCX: 00007fd64e67b8ec
RDX: 000000000000002c RSI: 00007fd64f338670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffe79547f04 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fd64f338670 R15: 0000000000000000
Allocated by task 5914:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
kasan_kmalloc include/linux/kasan.h:264 [inline]
__kmalloc_node+0x199/0x390 mm/slub.c:4455
kmalloc_node include/linux/slab.h:614 [inline]
kvmalloc_node+0x80/0x140 mm/util.c:619
kvmalloc include/linux/mm.h:805 [inline]
kvzalloc include/linux/mm.h:813 [inline]
snd_rawmidi_runtime_create sound/core/rawmidi.c:162 [inline]
open_substream+0x2a4/0x6d0 sound/core/rawmidi.c:306
rawmidi_open_priv+0xc2/0x680 sound/core/rawmidi.c:357
snd_rawmidi_kernel_open+0x1b3/0x240 sound/core/rawmidi.c:392
midisynth_use+0xe7/0x2a0 sound/core/seq/seq_midi.c:221
subscribe_port sound/core/seq/seq_ports.c:412 [inline]
check_and_subscribe_port+0x604/0xab0 sound/core/seq/seq_ports.c:495
snd_seq_port_connect+0x284/0x480 sound/core/seq/seq_ports.c:581
snd_seq_ioctl_subscribe_port+0x31a/0x780 sound/core/seq/seq_clientmgr.c:1490
snd_seq_oss_midi_open+0x425/0x9c0 sound/core/seq/oss/seq_oss_midi.c:365
snd_seq_oss_synth_setup_midi+0x114/0x500 sound/core/seq/oss/seq_oss_synth.c:269
snd_seq_oss_open+0x942/0x1010 sound/core/seq/oss/seq_oss_init.c:261
odev_open+0x5f/0x90 sound/core/seq/oss/seq_oss.c:128
chrdev_open+0x54a/0x630 fs/char_dev.c:414
do_dentry_open+0x807/0xfb0 fs/open.c:826
do_open fs/namei.c:3608 [inline]
path_openat+0x2705/0x2f20 fs/namei.c:3742
do_filp_open+0x21c/0x460 fs/namei.c:3769
do_sys_openat2+0x13b/0x4f0 fs/open.c:1253
do_sys_open fs/open.c:1269 [inline]
__do_sys_openat fs/open.c:1285 [inline]
__se_sys_openat fs/open.c:1280 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1280
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Freed by task 5914:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0xf1/0x270 mm/slub.c:4559
snd_rawmidi_runtime_free sound/core/rawmidi.c:176 [inline]
close_substream+0x390/0x600 sound/core/rawmidi.c:528
rawmidi_release_priv+0xf1/0x180 sound/core/rawmidi.c:547
snd_rawmidi_kernel_release+0x42/0xa0 sound/core/rawmidi.c:564
unsubscribe_port sound/core/seq/seq_ports.c:437 [inline]
__delete_and_unsubscribe_port+0x2c5/0x470 sound/core/seq/seq_ports.c:537
snd_seq_port_disconnect+0x4ab/0x5d0 sound/core/seq/seq_ports.c:616
snd_seq_ioctl_unsubscribe_port+0x31a/0x780 sound/core/seq/seq_clientmgr.c:1535
snd_seq_oss_midi_close+0x348/0x760 sound/core/seq/oss/seq_oss_midi.c:413
snd_seq_oss_synth_reset+0x3c2/0xa20 sound/core/seq/oss/seq_oss_synth.c:406
snd_seq_oss_reset+0x57/0x240 sound/core/seq/oss/seq_oss_init.c:436
snd_seq_oss_release+0xea/0x300 sound/core/seq/oss/seq_oss_init.c:413
odev_release+0x52/0x70 sound/core/seq/oss/seq_oss.c:144
__fput+0x3fe/0x8e0 fs/file_table.c:280
task_work_run+0x129/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
The buggy address belongs to the object at ffff8880789ec000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 126 bytes inside of
4096-byte region [ffff8880789ec000, ffff8880789ed000)
The buggy address belongs to the page:
page:ffffea0001e27a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x789e8
head:ffffea0001e27a00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 0000000200000001 ffff888011c42140
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4474, ts 107006801694, free_ts 106930582148
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
__alloc_pages+0x272/0x700 mm/page_alloc.c:5423
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc_trace+0x1a0/0x290 mm/slub.c:3245
kmalloc include/linux/slab.h:591 [inline]
kzalloc include/linux/slab.h:721 [inline]
kobject_uevent_env+0x283/0x8d0 lib/kobject_uevent.c:524
rx_queue_add_kobject net/core/net-sysfs.c:1070 [inline]
net_rx_queue_update_kobjects+0x215/0x470 net/core/net-sysfs.c:1110
register_queue_kobjects net/core/net-sysfs.c:1767 [inline]
netdev_register_kobject+0x222/0x310 net/core/net-sysfs.c:2018
register_netdevice+0x108c/0x1720 net/core/dev.c:10357
wg_newlink+0x4a1/0x740 drivers/net/wireguard/device.c:355
__rtnl_newlink net/core/rtnetlink.c:3501 [inline]
rtnl_newlink+0x14bd/0x2070 net/core/rtnetlink.c:3549
rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5629
netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1352
netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1920
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
__sys_sendto+0x564/0x720 net/socket.c:2058
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
free_slab mm/slub.c:2015 [inline]
discard_slab mm/slub.c:2021 [inline]
__unfreeze_partials+0x1b7/0x210 mm/slub.c:2507
put_cpu_partial+0x132/0x1a0 mm/slub.c:2587
do_slab_free mm/slub.c:3487 [inline]
___cache_free+0xe3/0x100 mm/slub.c:3506
qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233
getname_flags+0xb8/0x4e0 fs/namei.c:138
do_sys_openat2+0xd2/0x4f0 fs/open.c:1247
do_sys_open fs/open.c:1269 [inline]
__do_sys_openat fs/open.c:1285 [inline]
__se_sys_openat fs/open.c:1280 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1280
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Memory state around the buggy address:
ffff8880789ebf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880789ebf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880789ec000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880789ec080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880789ec100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 00 48 83 add %cl,-0x7d(%rax)
3: 7c 24 jl 0x29
5: 18 00 sbb %al,(%rax)
7: 75 19 jne 0x22
9: e8 49 04 1a 00 call 0x1a0457
e: eb 18 jmp 0x28
10: e8 42 04 1a 00 call 0x1a0457
15: e8 9d 53 b8 08 call 0x8b853b7
1a: 48 83 7c 24 18 00 cmpq $0x0,0x18(%rsp)
20: 74 e7 je 0x9
22: e8 30 04 1a 00 call 0x1a0457
27: fb sti
28: 31 ff xor %edi,%edi
* 2a: 44 89 f6 mov %r14d,%esi <-- trapping instruction
2d: e8 85 07 1a 00 call 0x1a07b7
32: 31 db xor %ebx,%ebx
34: 45 85 f6 test %r14d,%r14d
37: 0f 95 c0 setne %al
3a: 89 c1 mov %eax,%ecx
3c: 0a 4c 24 17 or 0x17(%rsp),%cl