BUG: KASAN: use-after-free in __lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925
Read of size 8 at addr ffff88804b9fd818 by task syz-executor.1/24798
CPU: 1 PID: 24798 Comm: syz-executor.1 Not tainted 6.1.0-rc4-syzkaller-00045-g1767a722a708 #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:lock_acquire+0x223/0x630 kernel/locking/lockdep.c:5636
Code: ae a2 7e 83 f8 01 0f 85 3a 03 00 00 9c 58 f6 c4 02 0f 85 25 03 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90022e974c8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920045d2e9c RCX: 7439b744288dfca6
RDX: 1ffff11002940899 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff90932947
R10: fffffbfff2126528 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8bf88ac0 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:304 [inline]
rcu_read_lock include/linux/rcupdate.h:738 [inline]
folio_memcg_lock+0x3a/0x630 mm/memcontrol.c:2098
page_remove_rmap+0x27/0x1110 mm/rmap.c:1426
zap_pte_range mm/memory.c:1456 [inline]
zap_pmd_range mm/memory.c:1577 [inline]
zap_pud_range mm/memory.c:1606 [inline]
zap_p4d_range mm/memory.c:1627 [inline]
unmap_page_range+0x11ee/0x3c90 mm/memory.c:1648
unmap_single_vma+0x190/0x2a0 mm/memory.c:1694
unmap_vmas+0x21e/0x370 mm/memory.c:1733
exit_mmap+0x189/0x7a0 mm/mmap.c:3090
__mmput+0x128/0x4c0 kernel/fork.c:1185
mmput+0x5c/0x70 kernel/fork.c:1207
exit_mm kernel/exit.c:516 [inline]
do_exit+0xa39/0x2a20 kernel/exit.c:807
do_group_exit+0xd0/0x2a0 kernel/exit.c:950
get_signal+0x21a1/0x2430 kernel/signal.c:2858
arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:296
__do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
RIP: 0023:0xf7fad549
Code: Unable to access opcode bytes at 0xf7fad51f.
RSP: 002b:00000000f7fa868c EFLAGS: 00000246 ORIG_RAX: 00000000000000f0
RAX: 0000000000000001 RBX: 00000000f737afcc RCX: 0000000000000081
RDX: 00000000000f4240 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000f721afb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 24797:
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 24797:
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
Second to 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 ffff88804b9fd800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
512-byte region [ffff88804b9fd800, ffff88804b9fda00)
The buggy address belongs to the physical page:
page:ffffea00012e7f00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4b9fc
head:ffffea00012e7f00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4fff00000010200(slab|head|node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff00000010200 ffffea0001d4de00 dead000000000002 ffff888011842c80
raw: 0000000000000000 0000000000100010 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 3713, tgid 3713 (syz-executor.0), ts 211673795119, free_ts 211670639951
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+0x46/0xc0 mm/slab_common.c:968
kmalloc include/linux/slab.h:558 [inline]
kzalloc include/linux/slab.h:689 [inline]
new_dir fs/proc/proc_sysctl.c:971 [inline]
get_subdir fs/proc/proc_sysctl.c:1015 [inline]
__register_sysctl_table+0x9eb/0x10a0 fs/proc/proc_sysctl.c:1366
__devinet_sysctl_register+0x156/0x280 net/ipv4/devinet.c:2586
devinet_sysctl_register net/ipv4/devinet.c:2626 [inline]
devinet_sysctl_register+0x160/0x230 net/ipv4/devinet.c:2616
inetdev_init+0x286/0x580 net/ipv4/devinet.c:279
inetdev_event+0xa85/0x1610 net/ipv4/devinet.c:1534
notifier_call_chain+0xb5/0x200 kernel/notifier.c:87
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945
call_netdevice_notifiers_extack net/core/dev.c:1983 [inline]
call_netdevice_notifiers net/core/dev.c:1997 [inline]
register_netdevice+0x10bb/0x1670 net/core/dev.c:10090
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]
ref_tracker_alloc+0x14c/0x550 lib/ref_tracker.c:85
__netdev_tracker_alloc include/linux/netdevice.h:3995 [inline]
netdev_hold include/linux/netdevice.h:4024 [inline]
netdev_hold include/linux/netdevice.h:4019 [inline]
netdev_queue_add_kobject net/core/net-sysfs.c:1663 [inline]
netdev_queue_update_kobjects+0x1a7/0x4e0 net/core/net-sysfs.c:1718
register_queue_kobjects net/core/net-sysfs.c:1779 [inline]
netdev_register_kobject+0x330/0x400 net/core/net-sysfs.c:2019
register_netdevice+0xd95/0x1670 net/core/dev.c:10057
veth_newlink+0x338/0x990 drivers/net/veth.c:1764
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
rtnetlink_rcv_msg+0x43a/0xca0 net/core/rtnetlink.c:6091
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2540
Memory state around the buggy address:
ffff88804b9fd700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88804b9fd780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88804b9fd800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88804b9fd880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88804b9fd900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: ae scas %es:(%rdi),%al
1: a2 7e 83 f8 01 0f 85 movabs %al,0x33a850f01f8837e
8: 3a 03
a: 00 00 add %al,(%rax)
c: 9c pushfq
d: 58 pop %rax
e: f6 c4 02 test $0x2,%ah
11: 0f 85 25 03 00 00 jne 0x33c
17: 48 83 7c 24 08 00 cmpq $0x0,0x8(%rsp)
1d: 74 01 je 0x20
1f: fb sti
20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
27: fc ff df
* 2a: 48 01 c3 add %rax,%rbx <-- trapping instruction
2d: 48 c7 03 00 00 00 00 movq $0x0,(%rbx)
34: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx)
3b: 00
3c: 48 rex.W
3d: 8b .byte 0x8b
3e: 84 .byte 0x84
3f: 24 .byte 0x24