==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x2da1/0x3b40 kernel/locking/lockdep.c:5005
Read of size 8 at addr ffff888054e18418 by task syz-executor.0/5210
CPU: 0 PID: 5210 Comm: syz-executor.0 Not tainted 6.8.0-rc6-syzkaller-00011-g45ec2f5f6ed3 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:377 [inline]
print_report+0xc4/0x620 mm/kasan/report.c:488
kasan_report+0xda/0x110 mm/kasan/report.c:601
__lock_acquire+0x2da1/0x3b40 kernel/locking/lockdep.c:5005
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 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+0x22a/0x750 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+0x52/0xd0 arch/x86/kernel/irq.c:247
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:640
RIP: 0010:__do_softirq+0x1e0/0x8e7 kernel/softirq.c:539
Code: 89 44 24 18 44 88 74 24 3b 48 c7 c7 a0 58 eb 8a e8 95 33 fc ff 65 66 c7 05 a3 3c 45 75 00 00 e8 36 6b d4 f6 fb bb ff ff ff ff <49> c7 c6 c0 a0 20 8d 41 0f bc dc 83 c3 01 0f 85 a7 00 00 00 e9 70
RSP: 0018:ffffc90000007f30 EFLAGS: 00000206
RAX: 000000000004243c RBX: 00000000ffffffff RCX: 1ffffffff275e3fd
RDX: 0000000000000000 RSI: ffffffff8aecb0a0 RDI: ffffffff8b4dbf40
RBP: 00000000ffffcfa1 R08: 0000000000000001 R09: fffffbfff275540e
R10: ffffffff93aaa077 R11: 0000000000000001 R12: 0000000000000202
R13: 000000000000000a R14: 0000000000000001 R15: 0000000000000000
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xbb/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x1ef/0x520 kernel/locking/lockdep.c:5722
Code: c1 05 8d ff 96 7e 83 f8 01 0f 85 b8 02 00 00 9c 58 f6 c4 02 0f 85 a3 02 00 00 48 85 ed 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:ffffc90003a1fa68 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000743f4f RCX: 00000000bb78c332
RDX: 0000000000000001 RSI: ffffffff8aecb3a0 RDI: ffffffff8b4dbf40
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff275540e
R10: ffffffff93aaa077 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: ffff888016bf2420 R15: 0000000000000000
percpu_down_read_trylock include/linux/percpu-rwsem.h:92 [inline]
__sb_start_write_trylock include/linux/fs.h:1646 [inline]
sb_start_write_trylock include/linux/fs.h:1782 [inline]
touch_atime+0x1bf/0x5d0 fs/inode.c:1976
file_accessed include/linux/fs.h:2436 [inline]
pipe_read+0xdb8/0x1410 fs/pipe.c:417
call_read_iter include/linux/fs.h:2081 [inline]
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0xa01/0xb80 fs/read_write.c:476
ksys_read+0x1f8/0x260 fs/read_write.c:619
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x7c/0x120 arch/x86/entry/common.c:321
do_fast_syscall_32+0x33/0x80 arch/x86/entry/common.c:346
entry_SYSENTER_compat_after_hwframe+0x7c/0x86
RIP: 0023:0xf7264579
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:00000000ffd35170 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00000000000000f9 RCX: 00000000f73de020
RDX: 0000000000000040 RSI: 00000000f73baff4 RDI: 0000000000000000
RBP: 0000000000000bb8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 5325:
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:372 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:389
kmalloc include/linux/slab.h:590 [inline]
p9_client_create+0xcf/0x11b0 net/9p/client.c:980
v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
v9fs_mount+0xc6/0xcd0 fs/9p/vfs_super.c:123
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+0x6e2/0x1f10 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+0x7c/0x120 arch/x86/entry/common.c:321
do_fast_syscall_32+0x33/0x80 arch/x86/entry/common.c:346
entry_SYSENTER_compat_after_hwframe+0x7c/0x86
Freed by task 5325:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:643
poison_slab_object mm/kasan/common.c:241 [inline]
__kasan_slab_free+0x121/0x1c0 mm/kasan/common.c:257
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2121 [inline]
slab_free mm/slub.c:4299 [inline]
kfree+0x124/0x370 mm/slub.c:4409
p9_client_create+0x9cb/0x11b0 net/9p/client.c:1051
v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
v9fs_mount+0xc6/0xcd0 fs/9p/vfs_super.c:123
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+0x6e2/0x1f10 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+0x7c/0x120 arch/x86/entry/common.c:321
do_fast_syscall_32+0x33/0x80 arch/x86/entry/common.c:346
entry_SYSENTER_compat_after_hwframe+0x7c/0x86
The buggy address belongs to the object at ffff888054e18400
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
freed 512-byte region [ffff888054e18400, ffff888054e18600)
The buggy address belongs to the physical page:
page:ffffea0001538600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x54e18
head:ffffea0001538600 order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0
ksm flags: 0x4fff00000000840(slab|head|node=1|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 04fff00000000840 ffff888014c42c80 ffffea000153ef00 dead000000000003
raw: 0000000000000000 0000000080100010 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 5215, tgid 5215 (syz-executor.3), ts 173925235990, free_ts 171699175272
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1533
prep_new_page mm/page_alloc.c:1540 [inline]
get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3311
__alloc_pages+0x22f/0x2440 mm/page_alloc.c:4567
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page mm/slub.c:2190 [inline]
allocate_slab mm/slub.c:2354 [inline]
new_slab+0xcc/0x3a0 mm/slub.c:2407
___slab_alloc+0x4b0/0x1780 mm/slub.c:3540
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3625
__slab_alloc_node mm/slub.c:3678 [inline]
slab_alloc_node mm/slub.c:3850 [inline]
__do_kmalloc_node mm/slub.c:3980 [inline]
__kmalloc+0x3b8/0x440 mm/slub.c:3994
kmalloc include/linux/slab.h:594 [inline]
kzalloc include/linux/slab.h:711 [inline]
fib6_info_alloc+0x40/0x100 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x337/0x1af0 net/ipv6/route.c:3749
addrconf_f6i_alloc+0x393/0x660 net/ipv6/route.c:4572
ipv6_add_addr+0x538/0x2030 net/ipv6/addrconf.c:1131
add_addr+0xe0/0x350 net/ipv6/addrconf.c:3158
add_v4_addrs+0x722/0xa00 net/ipv6/addrconf.c:3223
addrconf_gre_config net/ipv6/addrconf.c:3499 [inline]
addrconf_init_auto_addrs+0x18a/0x820 net/ipv6/addrconf.c:3517
addrconf_notify+0xe2d/0x18f0 net/ipv6/addrconf.c:3698
notifier_call_chain+0xb9/0x3c0 kernel/notifier.c:93
page last free pid 110 tgid 110 stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1140 [inline]
free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2346
free_unref_page+0x33/0x3c0 mm/page_alloc.c:2486
qlink_free mm/kasan/quarantine.c:160 [inline]
qlist_free_all+0x58/0x150 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:324
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3813 [inline]
slab_alloc_node mm/slub.c:3860 [inline]
kmem_cache_alloc_node+0x177/0x350 mm/slub.c:3903
zswap_entry_cache_alloc mm/zswap.c:355 [inline]
zswap_store+0x6cd/0x2410 mm/zswap.c:1565
swap_writepage+0x8e/0x220 mm/page_io.c:198
pageout+0x39f/0x9e0 mm/vmscan.c:654
shrink_folio_list+0x2f51/0x3ea0 mm/vmscan.c:1316
evict_folios+0x6e7/0x1b90 mm/vmscan.c:4521
try_to_shrink_lruvec+0x638/0xa10 mm/vmscan.c:4726
shrink_one+0x3f8/0x7b0 mm/vmscan.c:4765
shrink_many mm/vmscan.c:4828 [inline]
lru_gen_shrink_node mm/vmscan.c:4929 [inline]
shrink_node+0x21d0/0x3790 mm/vmscan.c:5888
kswapd_shrink_node mm/vmscan.c:6693 [inline]
balance_pgdat+0x9d2/0x1a90 mm/vmscan.c:6883
kswapd+0x5be/0xc00 mm/vmscan.c:7143
Memory state around the buggy address:
ffff888054e18300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888054e18380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888054e18400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888054e18480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888054e18500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 89 44 24 18 mov %eax,0x18(%rsp)
4: 44 88 74 24 3b mov %r14b,0x3b(%rsp)
9: 48 c7 c7 a0 58 eb 8a mov $0xffffffff8aeb58a0,%rdi
10: e8 95 33 fc ff call 0xfffc33aa
15: 65 66 c7 05 a3 3c 45 movw $0x0,%gs:0x75453ca3(%rip) # 0x75453cc2
1c: 75 00 00
1f: e8 36 6b d4 f6 call 0xf6d46b5a
24: fb sti
25: bb ff ff ff ff mov $0xffffffff,%ebx
* 2a: 49 c7 c6 c0 a0 20 8d mov $0xffffffff8d20a0c0,%r14 <-- trapping instruction
31: 41 0f bc dc bsf %r12d,%ebx
35: 83 c3 01 add $0x1,%ebx
38: 0f 85 a7 00 00 00 jne 0xe5
3e: e9 .byte 0xe9
3f: 70 .byte 0x70