==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x2de0/0x3cb0 kernel/locking/lockdep.c:5007
Read of size 8 at addr ffff888045cef418 by task swapper/3/0
CPU: 3 UID: 0 PID: 0 Comm: swapper/3 Not tainted 6.11.0-rc5-syzkaller-00219-g1934261d8974 #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:handle_softirqs+0x1da/0x8f0 kernel/softirq.c:540
Code: 89 44 24 18 48 89 6c 24 10 48 c7 c7 e0 76 4b 8b e8 9b ce c6 09 65 66 c7 05 99 d5 b3 7e 00 00 e8 3c 06 43 00 fb bb ff ff ff ff <49> c7 c6 c0 a0 a0 8d 41 0f bc dc 83 c3 01 0f 85 a7 00 00 00 e9 b4
RSP: 0018:ffffc90000908f30 EFLAGS: 00000206
RAX: 000000000180fce2 RBX: 00000000ffffffff RCX: 1ffffffff2027f91
RDX: 0000000000000000 RSI: ffffffff8b4cd740 RDI: ffffffff8bb0f900
RBP: ffff88801d6da440 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff901440df R11: 0000000000000000 R12: 0000000000000380
R13: 000000000000000a R14: 0000000000000001 R15: 0000000000000000
__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:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:default_idle+0xf/0x20 arch/x86/kernel/process.c:743
Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d d3 b8 2f 00 fb f4 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc900001a7e08 EFLAGS: 00000246
RAX: 000000000180fcdd RBX: 0000000000000003 RCX: ffffffff8b16cb79
RDX: 0000000000000000 RSI: ffffffff8b4cd740 RDI: ffffffff8bb0f900
RBP: ffffed1003adb488 R08: 0000000000000001 R09: ffffed100d526fd9
R10: ffff88806a937ecb R11: 0000000000000000 R12: 0000000000000003
R13: ffff88801d6da440 R14: ffffffff901440d8 R15: 0000000000000000
default_idle_call+0x6d/0xb0 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x32c/0x3f0 kernel/sched/idle.c:326
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:424
start_secondary+0x220/0x2b0 arch/x86/kernel/smpboot.c:313
common_startup_64+0x13e/0x148
Allocated by task 5267:
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 5267:
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:2252 [inline]
slab_free mm/slub.c:4473 [inline]
kfree+0x12a/0x3b0 mm/slub.c:4594
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 ffff888045cef400
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
freed 512-byte region [ffff888045cef400, ffff888045cef600)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888045cee400 pfn:0x45cec
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: ffff888045cee400 000000008010000e 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff88801ac42c80 0000000000000000 dead000000000001
head: ffff888045cee400 000000008010000e 00000001fdffffff 0000000000000000
head: 00fff00000000002 ffffea0001173b01 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 831, tgid 831 (kworker/2:2), ts 416594154166, free_ts 408490911242
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1493
prep_new_page mm/page_alloc.c:1501 [inline]
get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3439
__alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4695
__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:2321
allocate_slab mm/slub.c:2484 [inline]
new_slab+0x84/0x260 mm/slub.c:2537
___slab_alloc+0xdac/0x1870 mm/slub.c:3723
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3813
__slab_alloc_node mm/slub.c:3866 [inline]
slab_alloc_node mm/slub.c:4025 [inline]
__kmalloc_cache_noprof+0x2b4/0x300 mm/slub.c:4184
kmalloc_noprof include/linux/slab.h:681 [inline]
kzalloc_noprof include/linux/slab.h:807 [inline]
drm_atomic_helper_setup_commit+0x633/0x15e0 drivers/gpu/drm/drm_atomic_helper.c:2289
drm_atomic_helper_commit+0xa9/0x380 drivers/gpu/drm/drm_atomic_helper.c:2023
drm_atomic_commit+0x229/0x300 drivers/gpu/drm/drm_atomic.c:1522
drm_atomic_helper_dirtyfb+0x60d/0x790 drivers/gpu/drm/drm_damage_helper.c:181
drm_fbdev_shmem_helper_fb_dirty+0x1c9/0x330 drivers/gpu/drm/drm_fbdev_shmem.c:197
drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:383 [inline]
drm_fb_helper_damage_work+0x285/0x5e0 drivers/gpu/drm/drm_fb_helper.c:406
process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
page last free pid 5401 tgid 5401 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1094 [inline]
free_unref_page+0x64a/0xe40 mm/page_alloc.c:2612
__folio_put+0x31c/0x3e0 mm/swap.c:128
folio_put_refs include/linux/mm.h:1506 [inline]
gup_put_folio+0x21a/0x2a0 mm/gup.c:115
unpin_user_pages_dirty_lock+0x223/0x4e0 mm/gup.c:325
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release net/xdp/xdp_umem.c:61 [inline]
xdp_put_umem+0x1ab/0x470 net/xdp/xdp_umem.c:89
xp_release_deferred+0x14e/0x220 net/xdp/xsk_buff_pool.c:289
process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Memory state around the buggy address:
ffff888045cef300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888045cef380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888045cef400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888045cef480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888045cef500: 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: 48 89 6c 24 10 mov %rbp,0x10(%rsp)
9: 48 c7 c7 e0 76 4b 8b mov $0xffffffff8b4b76e0,%rdi
10: e8 9b ce c6 09 call 0x9c6ceb0
15: 65 66 c7 05 99 d5 b3 movw $0x0,%gs:0x7eb3d599(%rip) # 0x7eb3d5b8
1c: 7e 00 00
1f: e8 3c 06 43 00 call 0x430660
24: fb sti
25: bb ff ff ff ff mov $0xffffffff,%ebx
* 2a: 49 c7 c6 c0 a0 a0 8d mov $0xffffffff8da0a0c0,%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: b4 .byte 0xb4