==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925
Read of size 8 at addr ffff88801b1a4818 by task syz-executor.0/21899
CPU: 0 PID: 21899 Comm: syz-executor.0 Not tainted 6.2.0-rc6-syzkaller-00009-g58706f7fb045 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:306 [inline]
print_report+0x15e/0x461 mm/kasan/report.c:417
kasan_report+0xbf/0x1f0 mm/kasan/report.c:517
__lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
p9_tag_remove net/9p/client.c:390 [inline]
p9_req_put net/9p/client.c:398 [inline]
p9_req_put+0xca/0x250 net/9p/client.c:395
req_done+0x1e2/0x2e0 net/9p/trans_virtio.c:147
vring_interrupt drivers/virtio/virtio_ring.c:2470 [inline]
vring_interrupt+0x2a1/0x3d0 drivers/virtio/virtio_ring.c:2445
__handle_irq_event_percpu+0x264/0x970 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x263/0xd00 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+0xa1/0x210 arch/x86/kernel/irq.c:250
common_interrupt+0xa8/0xd0 arch/x86/kernel/irq.c:240
</IRQ>
<TASK>
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:640
RIP: 0010:lock_is_held_type+0x103/0x140 kernel/locking/lockdep.c:5716
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 b0 a0 fc 75 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48
RSP: 0018:ffffc90002f5f648 EFLAGS: 00000286
RAX: 0000000000000046 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8c78ea80 R08: 0000000000000000 R09: ffffffff8e722e17
R10: fffffbfff1ce45c2 R11: 00000000bfdcf87f R12: ffff88802774c180
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88802774cbb8
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3e/0x70 kernel/rcu/update.c:125
trace_lock_acquire include/trace/events/lock.h:24 [inline]
lock_acquire+0x500/0x630 kernel/locking/lockdep.c:5639
__fs_reclaim_acquire mm/page_alloc.c:4674 [inline]
fs_reclaim_acquire+0x11d/0x160 mm/page_alloc.c:4688
might_alloc include/linux/sched/mm.h:271 [inline]
slab_pre_alloc_hook mm/slab.h:720 [inline]
slab_alloc_node mm/slab.c:3247 [inline]
__kmem_cache_alloc_node+0x3b/0x510 mm/slab.c:3546
__do_kmalloc_node mm/slab_common.c:967 [inline]
__kmalloc_node+0x4d/0xd0 mm/slab_common.c:975
kmalloc_node include/linux/slab.h:610 [inline]
kvmalloc_node+0xa2/0x1a0 mm/util.c:581
kvmalloc include/linux/slab.h:737 [inline]
kvzalloc include/linux/slab.h:745 [inline]
netif_alloc_netdev_queues net/core/dev.c:9908 [inline]
alloc_netdev_mqs+0x9be/0x1180 net/core/dev.c:10645
ip6_tnl_init_net+0x217/0x890 net/ipv6/ip6_tunnel.c:2239
ops_init+0xb9/0x670 net/core/net_namespace.c:135
setup_net+0x793/0xe60 net/core/net_namespace.c:333
copy_net_ns+0x31b/0x6b0 net/core/net_namespace.c:483
create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
copy_namespaces+0x3b3/0x4a0 kernel/nsproxy.c:179
copy_process+0x30d3/0x7520 kernel/fork.c:2269
kernel_clone+0xeb/0x990 kernel/fork.c:2681
__do_sys_clone3+0x1cd/0x2e0 kernel/fork.c:2980
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f169e48c0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f169f1f6038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f169e5abf80 RCX: 00007f169e48c0c9
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00007f169f1f6050
RBP: 00007f169e4e7ae9 R08: 0000000000000000 R09: 0000000000000058
R10: 00007f169f1f6050 R11: 0000000000000246 R12: 0000000000000058
R13: 00007ffc5a20a0df R14: 00007f169f1f6300 R15: 0000000000022000
</TASK>
Allocated by task 21905:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:371 [inline]
____kasan_kmalloc mm/kasan/common.c:330 [inline]
__kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:380
kmalloc include/linux/slab.h:580 [inline]
p9_client_create+0xb3/0x1070 net/9p/client.c:975
v9fs_session_init+0x1e6/0x18b0 fs/9p/v9fs.c:407
v9fs_mount+0xbe/0xca0 fs/9p/vfs_super.c:125
legacy_get_tree+0x109/0x220 fs/fs_context.c:610
vfs_get_tree+0x8d/0x2f0 fs/super.c:1489
do_new_mount fs/namespace.c:3145 [inline]
path_mount+0x132a/0x1e20 fs/namespace.c:3475
do_mount fs/namespace.c:3488 [inline]
__do_sys_mount fs/namespace.c:3697 [inline]
__se_sys_mount fs/namespace.c:3674 [inline]
__x64_sys_mount+0x283/0x300 fs/namespace.c:3674
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 21905:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:518
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:177 [inline]
__cache_free mm/slab.c:3396 [inline]
__do_kmem_cache_free mm/slab.c:3582 [inline]
__kmem_cache_free+0xcd/0x3b0 mm/slab.c:3589
p9_client_create+0x7aa/0x1070 net/9p/client.c:1046
v9fs_session_init+0x1e6/0x18b0 fs/9p/v9fs.c:407
v9fs_mount+0xbe/0xca0 fs/9p/vfs_super.c:125
legacy_get_tree+0x109/0x220 fs/fs_context.c:610
vfs_get_tree+0x8d/0x2f0 fs/super.c:1489
do_new_mount fs/namespace.c:3145 [inline]
path_mount+0x132a/0x1e20 fs/namespace.c:3475
do_mount fs/namespace.c:3488 [inline]
__do_sys_mount fs/namespace.c:3697 [inline]
__se_sys_mount fs/namespace.c:3674 [inline]
__x64_sys_mount+0x283/0x300 fs/namespace.c:3674
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:488
kvfree_call_rcu+0x78/0x8f0 kernel/rcu/tree.c:3376
ma_put net/ipv6/mcast.c:869 [inline]
ma_put+0x11c/0x180 net/ipv6/mcast.c:865
__ipv6_dev_mc_dec+0x27c/0x340 net/ipv6/mcast.c:982
ipv6_mc_destroy_dev+0x2ca/0x630 net/ipv6/mcast.c:2800
addrconf_ifdown.isra.0+0x12c2/0x1920 net/ipv6/addrconf.c:3893
addrconf_notify+0x109/0x1c80 net/ipv6/addrconf.c:3673
notifier_call_chain+0xb5/0x200 kernel/notifier.c:87
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1944
call_netdevice_notifiers_extack net/core/dev.c:1982 [inline]
call_netdevice_notifiers net/core/dev.c:1996 [inline]
unregister_netdevice_many_notify+0xa2b/0x19e0 net/core/dev.c:10839
vti6_exit_batch_net+0x3a4/0x670 net/ipv6/ip6_vti.c:1188
ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:606
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x669/0x1090 kernel/workqueue.c:2436
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Second to last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:488
__call_rcu_common.constprop.0+0x99/0x820 kernel/rcu/tree.c:2755
__ip_vs_cleanup_batch+0x99/0x120 net/netfilter/ipvs/ip_vs_core.c:2356
ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:606
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x669/0x1090 kernel/workqueue.c:2436
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
The buggy address belongs to the object at ffff88801b1a4800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
512-byte region [ffff88801b1a4800, ffff88801b1a4a00)
The buggy address belongs to the physical page:
page:ffffea00006c6900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b1a4
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffff888012440600 ffffea00009666d0 ffffea000075c450
raw: 0000000000000000 ffff88801b1a4000 0000000100000004 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 433, tgid 433 (kworker/u17:3), ts 10333944194, free_ts 10277494553
prep_new_page mm/page_alloc.c:2531 [inline]
get_page_from_freelist+0x119c/0x2ce0 mm/page_alloc.c:4283
__alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5549
__alloc_pages_node include/linux/gfp.h:237 [inline]
kmem_getpages mm/slab.c:1363 [inline]
cache_grow_begin+0x94/0x390 mm/slab.c:2576
cache_alloc_refill+0x27f/0x380 mm/slab.c:2949
____cache_alloc mm/slab.c:3025 [inline]
____cache_alloc mm/slab.c:3008 [inline]
__do_cache_alloc mm/slab.c:3208 [inline]
slab_alloc_node mm/slab.c:3256 [inline]
__kmem_cache_alloc_node+0x44f/0x510 mm/slab.c:3546
kmalloc_trace+0x26/0x60 mm/slab_common.c:1062
kmalloc include/linux/slab.h:580 [inline]
kzalloc include/linux/slab.h:720 [inline]
alloc_bprm+0x51/0x900 fs/exec.c:1510
kernel_execve+0xaf/0x500 fs/exec.c:1981
call_usermodehelper_exec_async+0x2e7/0x580 kernel/umh.c:113
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1446 [inline]
free_pcp_prepare+0x65c/0xc00 mm/page_alloc.c:1496
free_unref_page_prepare mm/page_alloc.c:3369 [inline]
free_unref_page+0x1d/0x490 mm/page_alloc.c:3464
__folio_put_small mm/swap.c:106 [inline]
__folio_put+0xc5/0x140 mm/swap.c:129
folio_put include/linux/mm.h:1250 [inline]
put_page include/linux/mm.h:1319 [inline]
free_page_and_swap_cache+0x257/0x2c0 mm/swap_state.c:299
__tlb_remove_table arch/x86/include/asm/tlb.h:34 [inline]
__tlb_remove_table_free mm/mmu_gather.c:153 [inline]
tlb_remove_table_rcu+0x89/0xe0 mm/mmu_gather.c:208
rcu_do_batch kernel/rcu/tree.c:2246 [inline]
rcu_core+0x81f/0x1980 kernel/rcu/tree.c:2506
__do_softirq+0x1fb/0xadc kernel/softirq.c:571
Memory state around the buggy address:
ffff88801b1a4700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88801b1a4780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88801b1a4800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801b1a4880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801b1a4900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: b8 ff ff ff ff mov $0xffffffff,%eax
7: 65 0f c1 05 b0 a0 fc xadd %eax,%gs:0x75fca0b0(%rip) # 0x75fca0bf
e: 75
f: 83 f8 01 cmp $0x1,%eax
12: 75 29 jne 0x3d
14: 9c pushfq
15: 58 pop %rax
16: f6 c4 02 test $0x2,%ah
19: 75 3d jne 0x58
1b: 48 f7 04 24 00 02 00 testq $0x200,(%rsp)
22: 00
23: 74 01 je 0x26
25: fb sti
26: 48 83 c4 08 add $0x8,%rsp
* 2a: 44 89 e8 mov %r13d,%eax <-- trapping instruction
2d: 5b pop %rbx
2e: 5d pop %rbp
2f: 41 5c pop %r12
31: 41 5d pop %r13
33: 41 5e pop %r14
35: 41 5f pop %r15
37: c3 retq
38: 45 31 ed xor %r13d,%r13d
3b: eb b9 jmp 0xfffffff6
3d: 0f 0b ud2
3f: 48 rex.W