==================================================================
BUG: KASAN: slab-use-after-free in __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
Read of size 1 at addr ffff88802a3ba180 by task syz.0.246/6967
CPU: 0 UID: 0 PID: 6967 Comm: syz.0.246 Not tainted 6.15.0-rc1-syzkaller-00301-g3bde70a2c827 #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
__kasan_check_byte+0x36/0x50 mm/kasan/common.c:557
kasan_check_byte include/linux/kasan.h:399 [inline]
lock_acquire kernel/locking/lockdep.c:5840 [inline]
lock_acquire+0xfc/0x350 kernel/locking/lockdep.c:5823
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:105 [inline]
__wake_up+0x1c/0x60 kernel/sched/wait.c:127
snd_pcm_action_single+0x10a/0x150 sound/core/pcm_native.c:1295
snd_pcm_action+0x70/0x90 sound/core/pcm_native.c:1376
loopback_check_format sound/drivers/aloop.c:362 [inline]
loopback_trigger+0xd5a/0x1ec0 sound/drivers/aloop.c:410
snd_pcm_do_start sound/core/pcm_native.c:1437 [inline]
snd_pcm_do_start+0xd1/0x1f0 sound/core/pcm_native.c:1430
snd_pcm_action_single+0x7d/0x150 sound/core/pcm_native.c:1293
snd_pcm_action+0x70/0x90 sound/core/pcm_native.c:1376
__snd_pcm_lib_xfer+0x1404/0x1ec0 sound/core/pcm_lib.c:2405
snd_pcm_oss_write3+0xcf/0x1e0 sound/core/oss/pcm_oss.c:1242
snd_pcm_oss_write2+0x32b/0x410 sound/core/oss/pcm_oss.c:1382
snd_pcm_oss_sync1+0x1b7/0x540 sound/core/oss/pcm_oss.c:1616
snd_pcm_oss_sync+0x5ef/0x840 sound/core/oss/pcm_oss.c:1692
snd_pcm_oss_release+0x28b/0x310 sound/core/oss/pcm_oss.c:2575
__fput+0x3ff/0xb70 fs/file_table.c:465
task_work_run+0x14d/0x240 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
__do_fast_syscall_32+0x80/0x120 arch/x86/entry/syscall_32.c:309
do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf744e579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000ffb3201c EFLAGS: 00000202 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 000000000000001e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Allocated by task 6969:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
snd_pcm_attach_substream+0x441/0xd60 sound/core/pcm.c:938
snd_pcm_open_substream+0x8d/0x17f0 sound/core/pcm_native.c:2739
snd_pcm_oss_open_file sound/core/oss/pcm_oss.c:2439 [inline]
snd_pcm_oss_open+0x735/0x1400 sound/core/oss/pcm_oss.c:2520
soundcore_open+0x409/0x580 sound/sound_core.c:594
chrdev_open+0x231/0x6a0 fs/char_dev.c:414
do_dentry_open+0x741/0x1c10 fs/open.c:956
vfs_open+0x82/0x3f0 fs/open.c:1086
do_open fs/namei.c:3845 [inline]
path_openat+0x1e5e/0x2d40 fs/namei.c:4004
do_filp_open+0x20b/0x470 fs/namei.c:4031
do_sys_openat2+0x11b/0x1d0 fs/open.c:1429
do_sys_open fs/open.c:1444 [inline]
__do_compat_sys_openat fs/open.c:1506 [inline]
__se_compat_sys_openat fs/open.c:1504 [inline]
__ia32_compat_sys_openat+0x16d/0x210 fs/open.c:1504
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Freed by task 6969:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2389 [inline]
slab_free mm/slub.c:4646 [inline]
kfree+0x2b6/0x4d0 mm/slub.c:4845
snd_pcm_detach_substream+0x1d7/0x380 sound/core/pcm.c:1003
snd_pcm_release_substream+0x5b/0x70 sound/core/pcm_native.c:2712
snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2398 [inline]
snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2390 [inline]
snd_pcm_oss_release+0x16f/0x310 sound/core/oss/pcm_oss.c:2577
__fput+0x3ff/0xb70 fs/file_table.c:465
task_work_run+0x14d/0x240 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
__do_fast_syscall_32+0x80/0x120 arch/x86/entry/syscall_32.c:309
do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
The buggy address belongs to the object at ffff88802a3ba000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 384 bytes inside of
freed 2048-byte region [ffff88802a3ba000, ffff88802a3ba800)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2a3b8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b442f00 dead000000000100 dead000000000122
raw: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801b442f00 dead000000000100 dead000000000122
head: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0000a8ee01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5965, tgid 5965 (syz-executor), ts 114882296206, free_ts 109400692203
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1717
prep_new_page mm/page_alloc.c:1725 [inline]
get_page_from_freelist+0x1193/0x39b0 mm/page_alloc.c:3652
__alloc_pages_slowpath mm/page_alloc.c:4473 [inline]
__alloc_frozen_pages_noprof+0x5a8/0x23a0 mm/page_alloc.c:4947
alloc_slab_page mm/slub.c:2461 [inline]
allocate_slab mm/slub.c:2623 [inline]
new_slab+0x94/0x330 mm/slub.c:2676
___slab_alloc+0xd9c/0x1940 mm/slub.c:3862
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3952
__slab_alloc_node mm/slub.c:4027 [inline]
slab_alloc_node mm/slub.c:4188 [inline]
__kmalloc_cache_node_noprof+0x100/0x420 mm/slub.c:4370
kmalloc_node_noprof include/linux/slab.h:928 [inline]
alloc_mem_cgroup_per_node_info mm/memcontrol.c:3547 [inline]
mem_cgroup_alloc mm/memcontrol.c:3632 [inline]
mem_cgroup_css_alloc+0xae7/0x1f90 mm/memcontrol.c:3674
css_create kernel/cgroup/cgroup.c:5641 [inline]
cgroup_apply_control_enable+0x4b4/0xc70 kernel/cgroup/cgroup.c:3253
cgroup_mkdir+0x39a/0x1160 kernel/cgroup/cgroup.c:5857
kernfs_iop_mkdir+0x108/0x190 fs/kernfs/dir.c:1266
vfs_mkdir+0x590/0x8c0 fs/namei.c:4324
do_mkdirat+0x304/0x3e0 fs/namei.c:4357
__do_sys_mkdirat fs/namei.c:4374 [inline]
__se_sys_mkdirat fs/namei.c:4372 [inline]
__ia32_sys_mkdirat+0x82/0xb0 fs/namei.c:4372
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
page last free pid 5973 tgid 5973 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1262 [inline]
__free_frozen_pages+0x69d/0xff0 mm/page_alloc.c:2680
discard_slab mm/slub.c:2720 [inline]
__put_partials+0x16d/0x1c0 mm/slub.c:3189
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4151 [inline]
slab_alloc_node mm/slub.c:4200 [inline]
__kmalloc_cache_noprof+0x1f1/0x3e0 mm/slub.c:4357
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
ref_tracker_alloc+0x18e/0x5b0 lib/ref_tracker.c:203
__netdev_tracker_alloc include/linux/netdevice.h:4331 [inline]
netdev_hold include/linux/netdevice.h:4360 [inline]
netdev_hold include/linux/netdevice.h:4355 [inline]
rx_queue_add_kobject net/core/net-sysfs.c:1236 [inline]
net_rx_queue_update_kobjects+0x32e/0x770 net/core/net-sysfs.c:1301
register_queue_kobjects net/core/net-sysfs.c:2093 [inline]
netdev_register_kobject+0x269/0x3a0 net/core/net-sysfs.c:2340
register_netdevice+0x13dc/0x2270 net/core/dev.c:11007
veth_newlink+0x30f/0xa00 drivers/net/veth.c:1818
rtnl_newlink_create net/core/rtnetlink.c:3836 [inline]
__rtnl_newlink net/core/rtnetlink.c:3953 [inline]
rtnl_newlink+0xc42/0x2000 net/core/rtnetlink.c:4068
rtnetlink_rcv_msg+0x95b/0xe90 net/core/rtnetlink.c:6958
netlink_rcv_skb+0x16a/0x440 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
Memory state around the buggy address:
ffff88802a3ba080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802a3ba100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802a3ba180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88802a3ba200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802a3ba280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi