==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x2d90/0x3c40 kernel/locking/lockdep.c:5089
Read of size 8 at addr ffff88803243a418 by task syz-executor/6046
CPU: 3 UID: 0 PID: 6046 Comm: syz-executor Not tainted 6.13.0-rc4-syzkaller-00004-gf07044dd0df0 #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:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:489
kasan_report+0xd9/0x110 mm/kasan/report.c:602
__lock_acquire+0x2d90/0x3c40 kernel/locking/lockdep.c:5089
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
__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:2715 [inline]
vring_interrupt+0x31b/0x400 drivers/virtio/virtio_ring.c:2690
__handle_irq_event_percpu+0x229/0x7d0 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+0xba/0xe0 arch/x86/kernel/irq.c:278
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:memset_orig+0x33/0xb0 arch/x86/lib/memset_64.S:67
Code: b6 ce 48 b8 01 01 01 01 01 01 01 01 48 0f af c1 41 89 f9 41 83 e1 07 75 70 48 89 d1 48 c1 e9 06 74 35 0f 1f 44 00 00 48 ff c9 <48> 89 07 48 89 47 08 48 89 47 10 48 89 47 18 48 89 47 20 48 89 47
RSP: 0018:ffffc900034c7b68 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000001000 RCX: 0000000000000016
RDX: 0000000000001000 RSI: 0000000000000000 RDI: ffff8880352e8a40
RBP: ffffc900034c7bc8 R08: 0000000000000001 R09: 0000000000000000
R10: ffff8880352e8000 R11: 0000000000000001 R12: ffff88801b043040
R13: 0000000000000c40 R14: 0000000000001000 R15: ffffffff8460c259
slab_post_alloc_hook mm/slub.c:4122 [inline]
slab_alloc_node mm/slub.c:4168 [inline]
__do_kmalloc_node mm/slub.c:4297 [inline]
__kmalloc_noprof+0x1ee/0x510 mm/slub.c:4310
kmalloc_noprof include/linux/slab.h:905 [inline]
tomoyo_realpath_from_path+0xb9/0x720 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_number_perm+0x248/0x590 security/tomoyo/file.c:723
security_file_ioctl+0x9b/0x240 security/security.c:2908
__do_sys_ioctl fs/ioctl.c:900 [inline]
__se_sys_ioctl fs/ioctl.c:892 [inline]
__x64_sys_ioctl+0xb7/0x200 fs/ioctl.c:892
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
RIP: 0033:0x7f441338592b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007ffe5b99f7c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000001343e RCX: 00007f441338592b
RDX: 00007ffe5b99f838 RSI: 0000000040086602 RDI: 0000000000000005
RBP: 00007ffe5b99f8d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe5b9a0950
R13: 00007f4413401894 R14: 000055556292f4a8 R15: 0000000000000005
Allocated by task 13594:
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:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:901 [inline]
p9_client_create+0xc8/0x1200 net/9p/client.c:985
v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
v9fs_mount+0xc6/0xa30 fs/9p/vfs_super.c:122
legacy_get_tree+0x109/0x220 fs/fs_context.c:662
vfs_get_tree+0x8f/0x380 fs/super.c:1814
do_new_mount fs/namespace.c:3507 [inline]
path_mount+0x14e6/0x1f20 fs/namespace.c:3834
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount fs/namespace.c:4034 [inline]
__x64_sys_mount+0x294/0x320 fs/namespace.c:4034
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 13594:
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:582
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4613 [inline]
kfree+0x14f/0x4b0 mm/slub.c:4761
p9_client_create+0xa58/0x1200 net/9p/client.c:1064
v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
v9fs_mount+0xc6/0xa30 fs/9p/vfs_super.c:122
legacy_get_tree+0x109/0x220 fs/fs_context.c:662
vfs_get_tree+0x8f/0x380 fs/super.c:1814
do_new_mount fs/namespace.c:3507 [inline]
path_mount+0x14e6/0x1f20 fs/namespace.c:3834
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount fs/namespace.c:4034 [inline]
__x64_sys_mount+0x294/0x320 fs/namespace.c:4034
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 ffff88803243a400
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
freed 512-byte region [ffff88803243a400, ffff88803243a600)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32438
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: f5(slab)
raw: 00fff00000000040 ffff88801b042c80 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000
head: 00fff00000000040 ffff88801b042c80 0000000000000000 dead000000000001
head: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000
head: 00fff00000000002 ffffea0000c90e01 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 5352, tgid 5352 (udevd), ts 50996452392, free_ts 50895322012
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558
prep_new_page mm/page_alloc.c:1566 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476
__alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4753
alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269
alloc_slab_page mm/slub.c:2423 [inline]
allocate_slab mm/slub.c:2589 [inline]
new_slab+0x2c9/0x410 mm/slub.c:2642
___slab_alloc+0xd7d/0x17a0 mm/slub.c:3830
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920
__slab_alloc_node mm/slub.c:3995 [inline]
slab_alloc_node mm/slub.c:4156 [inline]
__kmalloc_cache_noprof+0xfa/0x410 mm/slub.c:4324
kmalloc_noprof include/linux/slab.h:901 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
kernfs_fop_open+0x28b/0xdb0 fs/kernfs/file.c:623
do_dentry_open+0xf59/0x1ea0 fs/open.c:945
vfs_open+0x82/0x3f0 fs/open.c:1075
do_open fs/namei.c:3828 [inline]
path_openat+0x1e6a/0x2d60 fs/namei.c:3987
do_filp_open+0x20c/0x470 fs/namei.c:4014
do_sys_openat2+0x17a/0x1e0 fs/open.c:1402
do_sys_open fs/open.c:1417 [inline]
__do_sys_openat fs/open.c:1433 [inline]
__se_sys_openat fs/open.c:1428 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1428
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 6050 tgid 6050 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0x661/0x1080 mm/page_alloc.c:2659
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4119 [inline]
slab_alloc_node mm/slub.c:4168 [inline]
__kmalloc_cache_node_noprof+0x252/0x420 mm/slub.c:4337
kmalloc_node_noprof include/linux/slab.h:924 [inline]
__get_vm_area_node+0x101/0x2f0 mm/vmalloc.c:3127
__vmalloc_node_range_noprof+0x26a/0x1530 mm/vmalloc.c:3806
__vmalloc_node_noprof mm/vmalloc.c:3911 [inline]
vzalloc_noprof+0x6b/0x90 mm/vmalloc.c:3984
alloc_counters net/ipv4/netfilter/ip_tables.c:799 [inline]
copy_entries_to_user net/ipv4/netfilter/ip_tables.c:821 [inline]
get_entries net/ipv4/netfilter/ip_tables.c:1022 [inline]
do_ipt_get_ctl+0x6b8/0xaa0 net/ipv4/netfilter/ip_tables.c:1668
nf_getsockopt+0x79/0xe0 net/netfilter/nf_sockopt.c:116
ip_getsockopt+0x18e/0x1e0 net/ipv4/ip_sockglue.c:1777
tcp_getsockopt+0x9e/0x100 net/ipv4/tcp.c:4671
do_sock_getsockopt+0x3fe/0x800 net/socket.c:2374
__sys_getsockopt+0x12f/0x260 net/socket.c:2403
__do_sys_getsockopt net/socket.c:2410 [inline]
__se_sys_getsockopt net/socket.c:2407 [inline]
__x64_sys_getsockopt+0xbd/0x160 net/socket.c:2407
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
Memory state around the buggy address:
ffff88803243a300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88803243a380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88803243a400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88803243a480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88803243a500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: b6 ce mov $0xce,%dh
2: 48 b8 01 01 01 01 01 movabs $0x101010101010101,%rax
9: 01 01 01
c: 48 0f af c1 imul %rcx,%rax
10: 41 89 f9 mov %edi,%r9d
13: 41 83 e1 07 and $0x7,%r9d
17: 75 70 jne 0x89
19: 48 89 d1 mov %rdx,%rcx
1c: 48 c1 e9 06 shr $0x6,%rcx
20: 74 35 je 0x57
22: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
27: 48 ff c9 dec %rcx
* 2a: 48 89 07 mov %rax,(%rdi) <-- trapping instruction
2d: 48 89 47 08 mov %rax,0x8(%rdi)
31: 48 89 47 10 mov %rax,0x10(%rdi)
35: 48 89 47 18 mov %rax,0x18(%rdi)
39: 48 89 47 20 mov %rax,0x20(%rdi)
3d: 48 rex.W
3e: 89 .byte 0x89
3f: 47 rex.RXB