==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925
Read of size 8 at addr ffff888023576418 by task syz-executor.3/3725
CPU: 1 PID: 3725 Comm: syz-executor.3 Not tainted 6.1.0-rc4-syzkaller-00372-gaf7a05689189 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x15e/0x45d mm/kasan/report.c:395
kasan_report+0xbb/0x1f0 mm/kasan/report.c:495
__lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1df/0x630 kernel/locking/lockdep.c:5633
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
p9_tag_remove net/9p/client.c:385 [inline]
p9_req_put net/9p/client.c:393 [inline]
p9_req_put+0xc6/0x250 net/9p/client.c:390
req_done+0x1de/0x2e0 net/9p/trans_virtio.c:148
vring_interrupt drivers/virtio/virtio_ring.c:2470 [inline]
vring_interrupt+0x29d/0x3d0 drivers/virtio/virtio_ring.c:2445
__handle_irq_event_percpu+0x260/0x970 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0xa7/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x25f/0xd00 kernel/irq/chip.c:819
generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
handle_irq arch/x86/kernel/irq.c:231 [inline]
__common_interrupt+0x9d/0x210 arch/x86/kernel/irq.c:250
common_interrupt+0xa4/0xc0 arch/x86/kernel/irq.c:240
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:640
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:28 [inline]
RIP: 0010:kfence_alloc include/linux/kfence.h:126 [inline]
RIP: 0010:slab_alloc_node mm/slub.c:3322 [inline]
RIP: 0010:__kmem_cache_alloc_node+0x241/0x3e0 mm/slub.c:3437
Code: 85 1b 01 00 00 48 8d 4a 08 65 48 0f c7 0f 0f 94 c0 84 c0 0f 84 fd fe ff ff 8b 45 28 0f 18 0c 03 48 8b 74 24 10 e9 58 ff ff ff <8b> 05 f9 1f 46 0a 85 c0 0f 85 d5 fe ff ff 48 8b 34 24 44 89 e2 48
RSP: 0018:ffffc900040776d8 EFLAGS: 00000282
RAX: 0000000000000000 RBX: 0000000000000dc0 RCX: 0000000000000001
RDX: 1ffffffff181e27c RSI: 0000000000000040 RDI: ffff88801d7becf4
RBP: ffff888011842640 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000dc0
R13: 00000000ffffffff R14: 0000000000000000 R15: 0000000000000dc0
__do_kmalloc_node mm/slab_common.c:954 [inline]
__kmalloc+0x46/0xc0 mm/slab_common.c:968
kmalloc include/linux/slab.h:558 [inline]
kzalloc include/linux/slab.h:689 [inline]
xt_jumpstack_alloc net/netfilter/x_tables.c:1334 [inline]
xt_replace_table+0x57c/0x8b0 net/netfilter/x_tables.c:1393
__do_replace+0x1d7/0x900 net/ipv4/netfilter/arp_tables.c:912
compat_do_replace.constprop.0+0x2d7/0x410 net/ipv6/netfilter/ip6_tables.c:1533
do_ip6t_set_ctl+0x5b0/0xb20 net/ipv6/netfilter/ip6_tables.c:1636
nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x127/0x190 net/ipv6/ipv6_sockglue.c:1030
tcp_setsockopt+0x9b/0x100 net/ipv4/tcp.c:3801
__sys_setsockopt+0x2d6/0x690 net/socket.c:2252
__do_compat_sys_socketcall+0x4ef/0x660 net/compat.c:489
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
RIP: 0023:0xf7fe5549
Code: 03 74 c0 01 10 05 03 74 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 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:00000000ff91fc50 EFLAGS: 00000286 ORIG_RAX: 0000000000000066
RAX: ffffffffffffffda RBX: 000000000000000e RCX: 00000000ff91fc68
RDX: 00000000ff91fde4 RSI: 00000000ff91fcd8 RDI: 00000000ff91fd2c
RBP: 00000000f734ef1c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 4067:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
kasan_set_track+0x21/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:371 [inline]
____kasan_kmalloc mm/kasan/common.c:330 [inline]
__kasan_kmalloc+0xa1/0xb0 mm/kasan/common.c:380
kmalloc include/linux/slab.h:553 [inline]
p9_client_create+0xaf/0x1070 net/9p/client.c:964
v9fs_session_init+0x1e2/0x1810 fs/9p/v9fs.c:408
v9fs_mount+0xba/0xc90 fs/9p/vfs_super.c:126
legacy_get_tree+0x105/0x220 fs/fs_context.c:610
vfs_get_tree+0x89/0x2f0 fs/super.c:1531
do_new_mount fs/namespace.c:3040 [inline]
path_mount+0x1326/0x1e20 fs/namespace.c:3370
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__ia32_sys_mount+0x27e/0x300 fs/namespace.c:3568
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
Freed by task 4067:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
kasan_set_track+0x21/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2a/0x40 mm/kasan/generic.c:511
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1750
slab_free mm/slub.c:3661 [inline]
__kmem_cache_free+0xab/0x3b0 mm/slub.c:3674
p9_client_create+0x7a6/0x1070 net/9p/client.c:1035
v9fs_session_init+0x1e2/0x1810 fs/9p/v9fs.c:408
v9fs_mount+0xba/0xc90 fs/9p/vfs_super.c:126
legacy_get_tree+0x105/0x220 fs/fs_context.c:610
vfs_get_tree+0x89/0x2f0 fs/super.c:1531
do_new_mount fs/namespace.c:3040 [inline]
path_mount+0x1326/0x1e20 fs/namespace.c:3370
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__ia32_sys_mount+0x27e/0x300 fs/namespace.c:3568
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
Last potentially related work creation:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:481
insert_work+0x48/0x350 kernel/workqueue.c:1358
__queue_work+0x693/0x13b0 kernel/workqueue.c:1517
call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1514 [inline]
__run_timers.part.0+0x4a3/0xaf0 kernel/time/timer.c:1790
__run_timers kernel/time/timer.c:1768 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
__do_softirq+0x1f7/0xad8 kernel/softirq.c:571
The buggy address belongs to the object at ffff888023576400
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
512-byte region [ffff888023576400, ffff888023576600)
The buggy address belongs to the physical page:
page:ffffea00008d5d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888023574800 pfn:0x23574
head:ffffea00008d5d00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea000099e508 ffffea00006a8b08 ffff888011842c80
raw: ffff888023574800 000000000010000f 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3718, tgid 3718 (syz-executor.0), ts 246770028456, free_ts 245253542429
prep_new_page mm/page_alloc.c:2539 [inline]
get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4288
__alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5555
alloc_pages+0x1a6/0x270 mm/mempolicy.c:2285
alloc_slab_page mm/slub.c:1794 [inline]
allocate_slab+0x213/0x300 mm/slub.c:1939
new_slab mm/slub.c:1992 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3180
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3279
slab_alloc_node mm/slub.c:3364 [inline]
__kmem_cache_alloc_node+0x191/0x3e0 mm/slub.c:3437
__do_kmalloc_node mm/slab_common.c:954 [inline]
__kmalloc_node_track_caller+0x47/0xc0 mm/slab_common.c:975
kmalloc_reserve net/core/skbuff.c:437 [inline]
__alloc_skb+0xd9/0x2f0 net/core/skbuff.c:509
alloc_skb include/linux/skbuff.h:1267 [inline]
alloc_uevent_skb+0x7b/0x210 lib/kobject_uevent.c:290
uevent_net_broadcast_tagged lib/kobject_uevent.c:351 [inline]
kobject_uevent_net_broadcast lib/kobject_uevent.c:412 [inline]
kobject_uevent_env+0x10ef/0x1620 lib/kobject_uevent.c:593
__kobject_del+0x160/0x1f0 lib/kobject.c:585
kobject_cleanup lib/kobject.c:664 [inline]
kobject_release lib/kobject.c:704 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x2ed/0x4c0 lib/kobject.c:721
netdev_queue_update_kobjects+0x367/0x4e0 net/core/net-sysfs.c:1733
netif_set_real_num_tx_queues+0x1b6/0x770 net/core/dev.c:2893
veth_init_queues+0xdd/0x190 drivers/net/veth.c:1687
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1459 [inline]
free_pcp_prepare+0x65c/0xd90 mm/page_alloc.c:1509
free_unref_page_prepare mm/page_alloc.c:3387 [inline]
free_unref_page+0x19/0x4d0 mm/page_alloc.c:3483
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x62/0x80 mm/kasan/common.c:302
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slab.h:737 [inline]
slab_alloc_node mm/slub.c:3398 [inline]
__kmem_cache_alloc_node+0x2da/0x3e0 mm/slub.c:3437
kmalloc_trace+0x22/0x60 mm/slab_common.c:1045
kmalloc include/linux/slab.h:553 [inline]
kzalloc include/linux/slab.h:689 [inline]
kobject_uevent_env+0x230/0x1620 lib/kobject_uevent.c:524
__kobject_del+0x160/0x1f0 lib/kobject.c:585
kobject_cleanup lib/kobject.c:664 [inline]
kobject_release lib/kobject.c:704 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x2ed/0x4c0 lib/kobject.c:721
netdev_queue_update_kobjects+0x367/0x4e0 net/core/net-sysfs.c:1733
netif_set_real_num_tx_queues+0x1b6/0x770 net/core/dev.c:2893
veth_init_queues+0xdd/0x190 drivers/net/veth.c:1687
veth_newlink+0x522/0x990 drivers/net/veth.c:1807
rtnl_newlink_create net/core/rtnetlink.c:3364 [inline]
__rtnl_newlink+0x1087/0x17e0 net/core/rtnetlink.c:3581
rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3594
Memory state around the buggy address:
ffff888023576300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888023576380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888023576400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888023576480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888023576500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 85 1b test %ebx,(%rbx)
2: 01 00 add %eax,(%rax)
4: 00 48 8d add %cl,-0x73(%rax)
7: 4a 08 65 48 rex.WX or %spl,0x48(%rbp)
b: 0f c7 0f cmpxchg8b (%rdi)
e: 0f 94 c0 sete %al
11: 84 c0 test %al,%al
13: 0f 84 fd fe ff ff je 0xffffff16
19: 8b 45 28 mov 0x28(%rbp),%eax
1c: 0f 18 0c 03 prefetcht0 (%rbx,%rax,1)
20: 48 8b 74 24 10 mov 0x10(%rsp),%rsi
25: e9 58 ff ff ff jmpq 0xffffff82
* 2a: 8b 05 f9 1f 46 0a mov 0xa461ff9(%rip),%eax # 0xa462029 <-- trapping instruction
30: 85 c0 test %eax,%eax
32: 0f 85 d5 fe ff ff jne 0xffffff0d
38: 48 8b 34 24 mov (%rsp),%rsi
3c: 44 89 e2 mov %r12d,%edx
3f: 48 rex.W