==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x2de0/0x3cb0 kernel/locking/lockdep.c:5007
Read of size 8 at addr ffff888028224418 by task syz.0.4203/13936
CPU: 3 UID: 0 PID: 13936 Comm: syz.0.4203 Not tainted 6.11.0-rc7-syzkaller-00145-g57719771a244 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
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+0x2de0/0x3cb0 kernel/locking/lockdep.c:5007
lock_acquire kernel/locking/lockdep.c:5759 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
__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:397 [inline]
p9_req_put net/9p/client.c:405 [inline]
p9_req_put+0xaf/0x250 net/9p/client.c:402
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:173 [inline]
handle_irq arch/x86/kernel/irq.c:247 [inline]
call_irq_handler arch/x86/kernel/irq.c:259 [inline]
__common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:285
common_interrupt+0x52/0xd0 arch/x86/kernel/irq.c:278
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:write_comp_data+0x8b/0x90 kernel/kcov.c:271
Code: 00 00 4a 8d 34 dd 28 00 00 00 48 39 f2 72 1b 48 83 c7 01 48 89 38 4c 89 44 30 e0 4c 89 4c 30 e8 4c 89 54 30 f0 4a 89 4c d8 20 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3
RSP: 0018:ffffc90000908718 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900009087a0 RCX: ffffffff813cef46
RDX: ffff88803468c880 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc900009087a0
R13: ffffffff81776c00 R14: ffffc90000908860 R15: ffff88803468c880
unwind_next_frame+0x46/0x23a0 arch/x86/kernel/unwind_orc.c:475
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
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+0xf7/0x160 mm/kasan/common.c:240
__kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2256 [inline]
slab_free mm/slub.c:4477 [inline]
kmem_cache_free+0x12f/0x3a0 mm/slub.c:4552
skb_kfree_head net/core/skbuff.c:1082 [inline]
skb_kfree_head net/core/skbuff.c:1079 [inline]
skb_free_head+0x18a/0x1d0 net/core/skbuff.c:1096
skb_release_data+0x75c/0x980 net/core/skbuff.c:1123
skb_release_all net/core/skbuff.c:1188 [inline]
__kfree_skb net/core/skbuff.c:1202 [inline]
consume_skb net/core/skbuff.c:1426 [inline]
consume_skb+0xd0/0x160 net/core/skbuff.c:1420
mac80211_hwsim_tx_frame+0x1f3/0x2a0 drivers/net/wireless/virtual/mac80211_hwsim.c:2216
__mac80211_hwsim_beacon_tx drivers/net/wireless/virtual/mac80211_hwsim.c:2232 [inline]
mac80211_hwsim_beacon_tx+0x592/0xa00 drivers/net/wireless/virtual/mac80211_hwsim.c:2315
__iterate_interfaces+0x2d0/0x5d0 net/mac80211/util.c:772
ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 net/mac80211/util.c:808
mac80211_hwsim_beacon+0x105/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2345
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1770
handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:124 [inline]
RIP: 0010:rcu_is_watching+0x41/0xc0 kernel/rcu/tree.c:726
Code: 03 00 83 f8 07 89 c5 0f 87 82 00 00 00 48 8d 3c ed 80 ab 7c 8d 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 5c 48 03 1c ed 80 ab 7c 8d 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffffc90006a6f528 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000037ec8 RCX: ffffffff8169c0b9
RDX: 1ffffffff1af9573 RSI: ffffffff8bb0fb80 RDI: ffffffff8d7cab98
RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff20289b3
R10: ffffffff90144d9f R11: 0000000000000000 R12: ffffffff8ddb9f20
R13: 0000000000000008 R14: 000000000003db0c R15: ffffc90006a6fab8
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x4f6/0x6f0 kernel/locking/lockdep.c:5770
rcu_lock_release include/linux/rcupdate.h:336 [inline]
rcu_read_unlock_sched include/linux/rcupdate.h:951 [inline]
pfn_valid include/linux/mmzone.h:2032 [inline]
page_table_check_clear mm/page_table_check.c:70 [inline]
__page_table_check_pte_clear+0x2d9/0x580 mm/page_table_check.c:169
page_table_check_pte_clear include/linux/page_table_check.h:49 [inline]
ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1284 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:678 [inline]
zap_present_folio_ptes mm/memory.c:1493 [inline]
zap_present_ptes mm/memory.c:1576 [inline]
zap_pte_range mm/memory.c:1618 [inline]
zap_pmd_range mm/memory.c:1736 [inline]
zap_pud_range mm/memory.c:1765 [inline]
zap_p4d_range mm/memory.c:1786 [inline]
unmap_page_range+0x228a/0x3d30 mm/memory.c:1807
unmap_single_vma+0x194/0x2b0 mm/memory.c:1853
unmap_vmas+0x22f/0x490 mm/memory.c:1897
exit_mmap+0x1b8/0xb20 mm/mmap.c:3412
__mmput+0x12a/0x480 kernel/fork.c:1345
mmput+0x62/0x70 kernel/fork.c:1367
exit_mm kernel/exit.c:571 [inline]
do_exit+0x9bf/0x2bb0 kernel/exit.c:869
do_group_exit+0xd3/0x2a0 kernel/exit.c:1031
get_signal+0x25fb/0x2770 kernel/signal.c:2917
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f90cd97def9
Code: Unable to access opcode bytes at 0x7f90cd97decf.
RSP: 002b:00007f90ce8330e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f90cdb35f88 RCX: 00007f90cd97def9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f90cdb35f88
RBP: 00007f90cdb35f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f90cdb35f8c
R13: 0000000000000000 R14: 00007fff9083a990 R15: 00007fff9083aa78
Allocated by task 13934:
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_noprof include/linux/slab.h:681 [inline]
p9_client_create+0xcf/0x1210 net/9p/client.c:983
v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
v9fs_mount+0xc6/0xa50 fs/9p/vfs_super.c:122
legacy_get_tree+0x109/0x220 fs/fs_context.c:662
vfs_get_tree+0x8f/0x380 fs/super.c:1800
do_new_mount fs/namespace.c:3472 [inline]
path_mount+0x14e6/0x1f20 fs/namespace.c:3799
do_mount fs/namespace.c:3812 [inline]
__do_sys_mount fs/namespace.c:4020 [inline]
__se_sys_mount fs/namespace.c:3997 [inline]
__x64_sys_mount+0x294/0x320 fs/namespace.c:3997
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 13934:
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+0xf7/0x160 mm/kasan/common.c:240
__kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2256 [inline]
slab_free mm/slub.c:4477 [inline]
kfree+0x12a/0x3b0 mm/slub.c:4598
p9_client_create+0xaaa/0x1210 net/9p/client.c:1054
v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
v9fs_mount+0xc6/0xa50 fs/9p/vfs_super.c:122
legacy_get_tree+0x109/0x220 fs/fs_context.c:662
vfs_get_tree+0x8f/0x380 fs/super.c:1800
do_new_mount fs/namespace.c:3472 [inline]
path_mount+0x14e6/0x1f20 fs/namespace.c:3799
do_mount fs/namespace.c:3812 [inline]
__do_sys_mount fs/namespace.c:4020 [inline]
__se_sys_mount fs/namespace.c:3997 [inline]
__x64_sys_mount+0x294/0x320 fs/namespace.c:3997
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888028224400
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
freed 512-byte region [ffff888028224400, ffff888028224600)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x28224
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000040 ffff88801ac42c80 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff88801ac42c80 0000000000000000 dead000000000001
head: 0000000000000000 0000000000100010 00000001fdffffff 0000000000000000
head: 00fff00000000002 ffffea0000a08901 ffffffffffffffff 0000000000000000
head: 0000000000000004 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4834, tgid 4834 (udevd), ts 46814742872, free_ts 46802483756
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500
prep_new_page mm/page_alloc.c:1508 [inline]
get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446
__alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x4e/0xf0 mm/slub.c:2325
allocate_slab mm/slub.c:2488 [inline]
new_slab+0x84/0x260 mm/slub.c:2541
___slab_alloc+0xdac/0x1870 mm/slub.c:3727
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3817
__slab_alloc_node mm/slub.c:3870 [inline]
slab_alloc_node mm/slub.c:4029 [inline]
__kmalloc_cache_noprof+0x2b4/0x300 mm/slub.c:4188
kmalloc_noprof include/linux/slab.h:681 [inline]
kzalloc_noprof include/linux/slab.h:807 [inline]
kernfs_fop_open+0x28b/0xdb0 fs/kernfs/file.c:623
do_dentry_open+0x91f/0x15f0 fs/open.c:959
vfs_open+0x82/0x3f0 fs/open.c:1089
do_open fs/namei.c:3727 [inline]
path_openat+0x2141/0x2d20 fs/namei.c:3886
do_filp_open+0x1dc/0x430 fs/namei.c:3913
do_sys_openat2+0x17a/0x1e0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_openat fs/open.c:1447 [inline]
__se_sys_openat fs/open.c:1442 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1442
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
page last free pid 4834 tgid 4834 stack trace:
create_dummy_stack mm/page_owner.c:94 [inline]
register_dummy_stack+0x8a/0xd0 mm/page_owner.c:100
init_page_owner+0x48/0xc00 mm/page_owner.c:118
invoke_init_callbacks mm/page_ext.c:148 [inline]
page_ext_init+0x6b8/0xab0 mm/page_ext.c:497
mm_core_init+0x12d/0x220 mm/mm_init.c:2673
Memory state around the buggy address:
ffff888028224300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888028224380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888028224400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888028224480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888028224500: 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: 4a 8d 34 dd 28 00 00 lea 0x28(,%r11,8),%rsi
9: 00
a: 48 39 f2 cmp %rsi,%rdx
d: 72 1b jb 0x2a
f: 48 83 c7 01 add $0x1,%rdi
13: 48 89 38 mov %rdi,(%rax)
16: 4c 89 44 30 e0 mov %r8,-0x20(%rax,%rsi,1)
1b: 4c 89 4c 30 e8 mov %r9,-0x18(%rax,%rsi,1)
20: 4c 89 54 30 f0 mov %r10,-0x10(%rax,%rsi,1)
25: 4a 89 4c d8 20 mov %rcx,0x20(%rax,%r11,8)
* 2a: c3 ret <-- trapping instruction
2b: cc int3
2c: cc int3
2d: cc int3
2e: cc int3
2f: 90 nop
30: 90 nop
31: 90 nop
32: 90 nop
33: 90 nop
34: 90 nop
35: 90 nop
36: 90 nop
37: 90 nop
38: 90 nop
39: 90 nop
3a: 90 nop
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: f3 repz