==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x2dd6/0x3b30 kernel/locking/lockdep.c:5005
Read of size 8 at addr ffff888024b92818 by task kworker/0:1/9
CPU: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.9.0-rc6-syzkaller-00022-g98369dccd2f8 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: rcu_gp process_srcu
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:488
kasan_report+0xd9/0x110 mm/kasan/report.c:601
__lock_acquire+0x2dd6/0x3b30 kernel/locking/lockdep.c:5005
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
p9_tag_remove net/9p/client.c:394 [inline]
p9_req_put net/9p/client.c:402 [inline]
p9_req_put+0xca/0x250 net/9p/client.c:399
req_done+0x1e7/0x2f0 net/9p/trans_virtio.c:147
vring_interrupt drivers/virtio/virtio_ring.c:2595 [inline]
vring_interrupt+0x31b/0x400 drivers/virtio/virtio_ring.c:2570
__handle_irq_event_percpu+0x229/0x7c0 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+0x263/0xd10 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
handle_irq arch/x86/kernel/irq.c:238 [inline]
__common_interrupt+0xde/0x250 arch/x86/kernel/irq.c:257
common_interrupt+0xab/0xd0 arch/x86/kernel/irq.c:247
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 fa 59 96 f6 48 89 df e8 32 d6 96 f6 e8 7d 1e bf f6 fb bf 01 00 00 00 22 1c 88 f6 65 8b 05 a3 74 2d 75 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc900003b7c90 EFLAGS: 00000202
RAX: 0000000000020ad9 RBX: ffff8880163068b0 RCX: 1ffffffff27af96c
RDX: 0000000000000000 RSI: ffffffff8b0cb860 RDI: 0000000000000001
RBP: ffffffff94678b80 R08: 0000000000000001 R09: fffffbfff27ad236
R10: ffffffff93d691b7 R11: 0000000000000002 R12: ffffffff94678bb8
R13: 0000000000000000 R14: 0000000000000002 R15: ffffc900003b7d80
spin_unlock_irq include/linux/spinlock.h:401 [inline]
srcu_reschedule+0xe8/0x1f0 kernel/rcu/srcutree.c:1792
process_one_work+0x902/0x1a30 kernel/workqueue.c:3267
process_scheduled_works kernel/workqueue.c:3348 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3429
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 5771:
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:370 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
kmalloc include/linux/slab.h:628 [inline]
p9_client_create+0xcf/0x11b0 net/9p/client.c:980
v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
v9fs_mount+0xc6/0xaa0 fs/9p/vfs_super.c:122
legacy_get_tree+0x109/0x220 fs/fs_context.c:662
vfs_get_tree+0x8f/0x380 fs/super.c:1779
do_new_mount fs/namespace.c:3352 [inline]
path_mount+0x6e1/0x1f10 fs/namespace.c:3679
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__ia32_sys_mount+0x295/0x320 fs/namespace.c:3875
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Freed by task 5771:
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:579
poison_slab_object mm/kasan/common.c:240 [inline]
__kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2106 [inline]
slab_free mm/slub.c:4280 [inline]
kfree+0x129/0x390 mm/slub.c:4390
p9_client_create+0x9ca/0x11b0 net/9p/client.c:1051
v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
v9fs_mount+0xc6/0xaa0 fs/9p/vfs_super.c:122
legacy_get_tree+0x109/0x220 fs/fs_context.c:662
vfs_get_tree+0x8f/0x380 fs/super.c:1779
do_new_mount fs/namespace.c:3352 [inline]
path_mount+0x6e1/0x1f10 fs/namespace.c:3679
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__ia32_sys_mount+0x295/0x320 fs/namespace.c:3875
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
The buggy address belongs to the object at ffff888024b92800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
freed 512-byte region [ffff888024b92800, ffff888024b92a00)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x24b90
head: order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888014c42c80 0000000000000000 dead000000000001
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
head: 00fff00000000840 ffff888014c42c80 0000000000000000 dead000000000001
head: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
head: 00fff00000000002 ffffea000092e401 dead000000000122 00000000ffffffff
head: 0000000400000000 0000000000000000 00000000ffffffff 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 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5210, tgid 547376283 (syz-executor.3), ts 5210, free_ts 56368749070
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534
prep_new_page mm/page_alloc.c:1541 [inline]
get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317
__alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page mm/slub.c:2175 [inline]
allocate_slab mm/slub.c:2338 [inline]
new_slab+0xcc/0x3a0 mm/slub.c:2391
___slab_alloc+0x670/0x16d0 mm/slub.c:3525
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610
__slab_alloc_node mm/slub.c:3663 [inline]
slab_alloc_node mm/slub.c:3835 [inline]
__do_kmalloc_node mm/slub.c:3965 [inline]
__kmalloc+0x3b4/0x440 mm/slub.c:3979
kmalloc include/linux/slab.h:632 [inline]
kzalloc include/linux/slab.h:749 [inline]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x337/0x1ae0 net/ipv6/route.c:3759
addrconf_f6i_alloc+0x393/0x670 net/ipv6/route.c:4583
fixup_permanent_addr net/ipv6/addrconf.c:3584 [inline]
addrconf_permanent_addr net/ipv6/addrconf.c:3623 [inline]
addrconf_notify+0x10ac/0x19e0 net/ipv6/addrconf.c:3695
notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1950
call_netdevice_notifiers_extack net/core/dev.c:1988 [inline]
call_netdevice_notifiers net/core/dev.c:2002 [inline]
__dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8731
dev_change_flags+0x10c/0x160 net/core/dev.c:8769
do_setlink+0x19a6/0x3ea0 net/core/rtnetlink.c:2884
page last free pid 5216 tgid 5216 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347
free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3798 [inline]
slab_alloc_node mm/slub.c:3845 [inline]
kmem_cache_alloc_node+0x177/0x340 mm/slub.c:3888
__alloc_skb+0x2b3/0x380 net/core/skbuff.c:658
alloc_skb include/linux/skbuff.h:1313 [inline]
netlink_alloc_large_skb+0x69/0x130 net/netlink/af_netlink.c:1210
netlink_sendmsg+0x689/0xd70 net/netlink/af_netlink.c:1880
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
__sys_sendto+0x47f/0x4e0 net/socket.c:2191
__do_compat_sys_socketcall+0x5e2/0x700 net/compat.c:475
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Memory state around the buggy address:
ffff888024b92700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888024b92780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888024b92800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888024b92880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888024b92900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 90 nop
1: f3 0f 1e fa endbr64
5: 53 push %rbx
6: 48 8b 74 24 08 mov 0x8(%rsp),%rsi
b: 48 89 fb mov %rdi,%rbx
e: 48 83 c7 18 add $0x18,%rdi
12: e8 fa 59 96 f6 call 0xf6965a11
17: 48 89 df mov %rbx,%rdi
1a: e8 32 d6 96 f6 call 0xf696d651
1f: e8 7d 1e bf f6 call 0xf6bf1ea1
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 22 1c 88 f6 call 0xf6881c51 <-- trapping instruction
2f: 65 8b 05 a3 74 2d 75 mov %gs:0x752d74a3(%rip),%eax # 0x752d74d9
36: 85 c0 test %eax,%eax
38: 74 06 je 0x40
3a: 5b pop %rbx
3b: c3 ret
3c: cc int3
3d: cc int3
3e: cc int3
3f: cc int3