==================================================================
BUG: KASAN: slab-use-after-free in __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:155 [inline]
BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:181
Read of size 1 at addr ffff88803733a818 by task kworker/3:4/5885
CPU: 3 UID: 0 PID: 5885 Comm: kworker/3:4 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: usb_hub_wq hub_event
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0x13d/0x4b0 mm/kasan/report.c:482
kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
__kasan_check_byte+0x36/0x50 mm/kasan/common.c:574
kasan_check_byte include/linux/kasan.h:402 [inline]
lock_acquire kernel/locking/lockdep.c:5860 [inline]
lock_acquire+0x132/0x370 kernel/locking/lockdep.c:5843
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:155 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:181
p9_tag_remove net/9p/client.c:274 [inline]
p9_req_put net/9p/client.c:282 [inline]
p9_req_put+0xaf/0x250 net/9p/client.c:279
req_done+0x1dc/0x2e0 net/9p/trans_virtio.c:147
vring_interrupt+0x2ef/0x660 drivers/virtio/virtio_ring.c:3305
__handle_irq_event_percpu+0x232/0x880 kernel/irq/handle.c:209
handle_irq_event_percpu kernel/irq/handle.c:246 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:263
handle_edge_irq+0x34c/0x950 kernel/irq/chip.c:859
generic_handle_irq_desc include/linux/irqdesc.h:188 [inline]
handle_irq arch/x86/kernel/irq.c:209 [inline]
call_irq_handler arch/x86/kernel/irq.c:265 [inline]
__common_interrupt+0xd8/0x2f0 arch/x86/kernel/irq.c:280
common_interrupt+0x60/0xe0 arch/x86/kernel/irq.c:273
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:665
RIP: 0010:handle_softirqs+0x1a9/0x9d0 kernel/softirq.c:631
Code: 89 6c 24 28 4c 89 7c 24 10 48 c7 c7 a0 7c ed 8b e8 dc b0 fd 09 31 d2 65 66 89 15 5e 97 be 12 e8 7d 06 4a 00 fb bb ff ff ff ff <48> c7 c5 c0 a0 a0 8e 41 0f bc dc 83 c3 01 0f 85 9d 00 00 00 e9 b9
RSP: 0018:ffffc900006f8f20 EFLAGS: 00000206
RAX: 0000000000031796 RBX: 00000000ffffffff RCX: 0000000000000004
RDX: 0000000000000101 RSI: ffffffff8e3d3fc0 RDI: ffffffff8c615f80
RBP: 1ffff920000df1ec R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000202
R13: 000000000000000a R14: 00000000fffffd82 R15: fffffbfff1d41e50
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x194/0x210 kernel/softirq.c:767
irq_exit_rcu+0x9/0x30 kernel/softirq.c:784
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:finish_task_switch.isra.0+0x2ca/0x10d0 kernel/sched/core.c:5371
Code: b6 0a 00 00 41 c7 87 20 0e 00 00 00 00 00 00 0f 1f 44 00 00 49 8d 7f 48 e8 43 75 f3 09 e8 be eb 3c 00 fb 48 8d bb 08 17 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84
RSP: 0018:ffffc900046b6e78 EFLAGS: 00000206
RAX: 0000000000031793 RBX: ffff88802c0f2580 RCX: 0000000000000040
RDX: 0000000000000001 RSI: ffffffff8e3d3fc0 RDI: ffff88802c0f3c88
RBP: ffffc900046b6ed0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888026f68000
R13: 0000000000000000 R14: ffffffff91438a84 R15: ffff88806a73b900
context_switch kernel/sched/core.c:5523 [inline]
__schedule+0x1261/0x6920 kernel/sched/core.c:7270
preempt_schedule_notrace+0x57/0xd0 kernel/sched/core.c:7542
preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13
rcu_is_watching+0x90/0xc0 kernel/rcu/tree.c:753
rcu_read_lock_held_common kernel/rcu/update.c:109 [inline]
rcu_read_lock_held+0x1e/0x50 kernel/rcu/update.c:349
kernfs_root+0x20e/0x2a0 fs/kernfs/kernfs-internal.h:77
kernfs_activate_one+0x1f8/0x290 fs/kernfs/dir.c:1431
kernfs_activate fs/kernfs/dir.c:1466 [inline]
kernfs_add_one+0x5ec/0xaa0 fs/kernfs/dir.c:868
__kernfs_create_file+0x295/0x350 fs/kernfs/file.c:1079
sysfs_add_file_mode_ns+0x207/0x3c0 fs/sysfs/file.c:316
create_files fs/sysfs/group.c:82 [inline]
internal_create_group+0x593/0xfb0 fs/sysfs/group.c:189
internal_create_groups+0x9d/0x150 fs/sysfs/group.c:229
device_add_groups drivers/base/core.c:2911 [inline]
device_add_attrs drivers/base/core.c:2986 [inline]
device_add+0x7c8/0x1970 drivers/base/core.c:3715
usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2268
usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250
usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:628 [inline]
really_probe+0x241/0xa60 drivers/base/dd.c:706
__driver_probe_device+0x210/0x460 drivers/base/dd.c:868
driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
__device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026
bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
__device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098
device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153
bus_probe_device+0x64/0x160 drivers/base/bus.c:620
device_add+0x121d/0x1970 drivers/base/core.c:3776
usb_new_device.part.0+0xcc2/0x1686 drivers/usb/core/hub.c:2703
usb_new_device include/linux/workqueue.h:714 [inline]
hub_port_connect drivers/usb/core/hub.c:5575 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5715 [inline]
port_event drivers/usb/core/hub.c:5879 [inline]
hub_event.cold+0x1e3/0xe90 drivers/usb/core/hub.c:5961
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3387
process_scheduled_works kernel/workqueue.c:3470 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3551
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 9225:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_noprof+0x2e7/0x6b0 mm/slub.c:5484
_kmalloc_noprof include/linux/slab.h:988 [inline]
p9_client_create+0xaf/0xd40 net/9p/client.c:864
v9fs_session_init+0x3c/0xdd0 fs/9p/v9fs.c:471
v9fs_get_tree+0xb8/0xb50 fs/9p/vfs_super.c:97
vfs_get_tree+0x92/0x320 fs/super.c:1947
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount fs/namespace.c:3848 [inline]
path_mount+0x7d0/0x24c0 fs/namespace.c:4168
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount fs/namespace.c:4374 [inline]
__x64_sys_mount+0x293/0x310 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 9225:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2678 [inline]
slab_free mm/slub.c:6372 [inline]
kfree+0x22b/0x6c0 mm/slub.c:6687
p9_client_create+0x72d/0xd40 net/9p/client.c:943
v9fs_session_init+0x3c/0xdd0 fs/9p/v9fs.c:471
v9fs_get_tree+0xb8/0xb50 fs/9p/vfs_super.c:97
vfs_get_tree+0x92/0x320 fs/super.c:1947
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount fs/namespace.c:3848 [inline]
path_mount+0x7d0/0x24c0 fs/namespace.c:4168
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount fs/namespace.c:4374 [inline]
__x64_sys_mount+0x293/0x310 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88803733a800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
freed 512-byte region [ffff88803733a800, ffff88803733aa00)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x37338
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801c042c80 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801c042c80 dead000000000100 dead000000000122
head: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffffffffffff01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5437, tgid 5437 (dhcpcd), ts 75351893662
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x110d/0x35b0 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x2eb/0x3300 mm/page_alloc.c:5436
alloc_slab_page mm/slub.c:3267 [inline]
allocate_slab mm/slub.c:3382 [inline]
new_slab+0xa5/0x640 mm/slub.c:3428
refill_objects+0xe3/0x410 mm/slub.c:7305
refill_sheaf mm/slub.c:2805 [inline]
__pcs_replace_empty_main+0x372/0x680 mm/slub.c:4677
alloc_from_pcs mm/slub.c:4775 [inline]
slab_alloc_node mm/slub.c:4907 [inline]
__do_kmalloc_node mm/slub.c:5336 [inline]
__kmalloc_noprof+0x66b/0x820 mm/slub.c:5362
_kmalloc_noprof include/linux/slab.h:992 [inline]
_kzalloc_noprof include/linux/slab.h:1309 [inline]
tomoyo_init_log+0x1224/0x20c0 security/tomoyo/audit.c:273
tomoyo_supervisor+0x506/0x1340 security/tomoyo/common.c:2232
tomoyo_audit_path_number_log security/tomoyo/file.c:239 [inline]
tomoyo_path_number_perm+0x445/0x580 security/tomoyo/file.c:739
tomoyo_path_mknod+0x164/0x190 security/tomoyo/tomoyo.c:252
security_path_mknod+0x161/0x300 security/security.c:1417
unix_bind_bsd net/unix/af_unix.c:1389 [inline]
unix_bind+0x311/0x1650 net/unix/af_unix.c:1484
__sys_bind_socket net/socket.c:1945 [inline]
__sys_bind_socket net/socket.c:1937 [inline]
__sys_bind+0x1a9/0x260 net/socket.c:1976
__do_sys_bind net/socket.c:1981 [inline]
__se_sys_bind net/socket.c:1979 [inline]
__x64_sys_bind+0x72/0xb0 net/socket.c:1979
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
page last free pid 5432 tgid 5432 ts 75264952328 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0x79f/0x10f0 mm/page_alloc.c:2962
stack_depot_save_flags+0x456/0x9f0 lib/stackdepot.c:735
kasan_save_stack+0x3f/0x50 mm/kasan/common.c:58
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4586 [inline]
slab_alloc_node mm/slub.c:4919 [inline]
kmem_cache_alloc_lru_noprof+0x267/0x6a0 mm/slub.c:4952
proc_alloc_inode+0x25/0x200 fs/proc/inode.c:57
alloc_inode+0x68/0x250 fs/inode.c:338
new_inode+0x22/0x1c0 fs/inode.c:1171
proc_pid_make_inode+0x22/0x160 fs/proc/base.c:1932
proc_pident_instantiate+0x85/0x310 fs/proc/base.c:2667
proc_pident_lookup+0x1e3/0x270 fs/proc/base.c:2702
__lookup_slow+0x155/0x320 fs/namei.c:1919
lookup_slow+0x50/0x70 fs/namei.c:1936
walk_component fs/namei.c:2282 [inline]
lookup_last fs/namei.c:2789 [inline]
path_lookupat+0x5e8/0xc40 fs/namei.c:2813
filename_lookup+0x202/0x590 fs/namei.c:2842
Memory state around the buggy address:
ffff88803733a700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88803733a780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88803733a800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88803733a880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88803733a900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 89 6c 24 28 mov %ebp,0x28(%rsp)
4: 4c 89 7c 24 10 mov %r15,0x10(%rsp)
9: 48 c7 c7 a0 7c ed 8b mov $0xffffffff8bed7ca0,%rdi
10: e8 dc b0 fd 09 call 0x9fdb0f1
15: 31 d2 xor %edx,%edx
17: 65 66 89 15 5e 97 be mov %dx,%gs:0x12be975e(%rip) # 0x12be977d
1e: 12
1f: e8 7d 06 4a 00 call 0x4a06a1
24: fb sti
25: bb ff ff ff ff mov $0xffffffff,%ebx
* 2a: 48 c7 c5 c0 a0 a0 8e mov $0xffffffff8ea0a0c0,%rbp <-- trapping instruction
31: 41 0f bc dc bsf %r12d,%ebx
35: 83 c3 01 add $0x1,%ebx
38: 0f 85 9d 00 00 00 jne 0xdb
3e: e9 .byte 0xe9
3f: b9 .byte 0xb9