==================================================================
BUG: KASAN: slab-use-after-free in find_endpoint+0x2a3/0x2c0 drivers/usb/gadget/udc/dummy_hcd.c:1618
Read of size 1 at addr ffff8880566434e8 by task acpid/5119
CPU: 3 UID: 0 PID: 5119 Comm: acpid 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
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
find_endpoint+0x2a3/0x2c0 drivers/usb/gadget/udc/dummy_hcd.c:1618
dummy_timer+0x500/0x3700 drivers/usb/gadget/udc/dummy_hcd.c:1890
__run_hrtimer kernel/time/hrtimer.c:2067 [inline]
__hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2124
hrtimer_run_softirq+0x1ca/0x360 kernel/time/hrtimer.c:2141
handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
__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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:221
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 86 7e 1c f6 48 89 df e8 9e d4 1c f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 c5 dd 0b f6 65 48 83 3d 64 05 be 08 00 74 16 5b
RSP: 0018:ffffc900037f76f0 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffff88802ba28000 RCX: 0000000000000040
RDX: 0000000000000001 RSI: ffffffff8e3d3fc0 RDI: ffffffff8c615f80
RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 00000000c0000000
R13: ffff88802c865478 R14: 0000000000000000 R15: ffff88802c865400
spin_unlock_irqrestore include/linux/spinlock.h:425 [inline]
dummy_urb_enqueue+0x56c/0x880 drivers/usb/gadget/udc/dummy_hcd.c:1337
usb_hcd_submit_urb+0x268/0x2150 drivers/usb/core/hcd.c:1542
usb_submit_urb+0x827/0x19b0 drivers/usb/core/urb.c:586
usbtouch_start_io drivers/input/touchscreen/usbtouchscreen.c:1335 [inline]
usbtouch_open+0x25b/0x310 drivers/input/touchscreen/usbtouchscreen.c:1355
input_start_device drivers/input/input.c:621 [inline]
input_open_device+0x2ac/0x660 drivers/input/input.c:659
mousedev_open_device+0xe2/0x140 drivers/input/mousedev.c:430
mousedev_open+0x2fd/0x580 drivers/input/mousedev.c:556
chrdev_open+0x234/0x6a0 fs/char_dev.c:411
do_dentry_open+0x6ab/0x14d0 fs/open.c:996
vfs_open+0x82/0x3f0 fs/open.c:1101
do_open fs/namei.c:4837 [inline]
path_openat+0x19fa/0x2440 fs/namei.c:5000
do_file_open+0x20e/0x430 fs/namei.c:5029
do_sys_openat2+0x10f/0x1e0 fs/open.c:1417
do_sys_open fs/open.c:1423 [inline]
__do_sys_openat fs/open.c:1439 [inline]
__se_sys_openat fs/open.c:1434 [inline]
__x64_sys_openat+0x12d/0x210 fs/open.c:1434
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
RIP: 0033:0x7f337d23e407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffc1eb46fc0 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f337d1b4780 RCX: 00007f337d23e407
RDX: 0000000000080800 RSI: 00007ffc1eb471d0 RDI: ffffffffffffff9c
RBP: 00007ffc1eb471d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000040
R13: 00007ffc1eb472d0 R14: 00005611d36b97fe R15: 00007ffc1eb472d0
Allocated by task 10639:
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]
__do_kmalloc_node mm/slub.c:5337 [inline]
__kmalloc_noprof+0x324/0x820 mm/slub.c:5362
_kmalloc_noprof include/linux/slab.h:992 [inline]
_kzalloc_noprof include/linux/slab.h:1309 [inline]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x14c/0xad0 net/ipv6/route.c:3833
ip6_route_add+0x4b/0x1d0 net/ipv6/route.c:3962
addrconf_add_mroute+0x1de/0x350 net/ipv6/addrconf.c:2568
addrconf_add_dev+0x14e/0x1a0 net/ipv6/addrconf.c:2586
inet6_addr_add+0xfc/0x9a0 net/ipv6/addrconf.c:3056
inet6_rtm_newaddr+0x147a/0x1bb0 net/ipv6/addrconf.c:5095
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:7132
netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2556
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:800 [inline]
__sock_sendmsg net/socket.c:815 [inline]
__sys_sendto+0x48b/0x4e0 net/socket.c:2281
__do_sys_sendto net/socket.c:2288 [inline]
__se_sys_sendto net/socket.c:2284 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2284
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 57:
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
rcu_do_batch kernel/rcu/tree.c:2645 [inline]
rcu_core+0x5a2/0x10e0 kernel/rcu/tree.c:2897
handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
do_softirq kernel/softirq.c:546 [inline]
do_softirq+0xaf/0xf0 kernel/softirq.c:533
__local_bh_enable_ip+0xff/0x120 kernel/softirq.c:473
local_bh_enable include/linux/bottom_half.h:33 [inline]
__alloc_skb+0x5db/0x710 net/core/skbuff.c:699
alloc_skb include/linux/skbuff.h:1384 [inline]
mld_newpack.isra.0+0x18e/0xa20 net/ipv6/mcast.c:1790
add_grhead+0x299/0x340 net/ipv6/mcast.c:1901
add_grec+0x1389/0x1930 net/ipv6/mcast.c:2040
mld_send_cr net/ipv6/mcast.c:2165 [inline]
mld_ifc_work+0x3c5/0xc10 net/ipv6/mcast.c:2711
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
Last potentially related work creation:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556
__call_rcu_common.constprop.0+0xa5/0x9b0 kernel/rcu/tree.c:3159
call_rcu_hurry include/linux/rcupdate.h:125 [inline]
fib6_info_release include/net/ip6_fib.h:344 [inline]
fib6_info_release include/net/ip6_fib.h:340 [inline]
ip6_route_info_create_nh+0x981/0xfe0 net/ipv6/route.c:3943
ip6_route_add+0x80/0x1d0 net/ipv6/route.c:3966
addrconf_add_mroute+0x1de/0x350 net/ipv6/addrconf.c:2568
addrconf_add_dev+0x14e/0x1a0 net/ipv6/addrconf.c:2586
inet6_addr_add+0xfc/0x9a0 net/ipv6/addrconf.c:3056
inet6_rtm_newaddr+0x147a/0x1bb0 net/ipv6/addrconf.c:5095
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:7132
netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2556
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:800 [inline]
__sock_sendmsg net/socket.c:815 [inline]
__sys_sendto+0x48b/0x4e0 net/socket.c:2281
__do_sys_sendto net/socket.c:2288 [inline]
__se_sys_sendto net/socket.c:2284 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2284
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 ffff888056643400
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 232 bytes inside of
freed 512-byte region [ffff888056643400, ffff888056643600)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888056642000 pfn:0x56640
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801c042c80 ffffea00015a2e10 ffffea0000fa8010
raw: ffff888056642000 0000000800100008 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801c042c80 ffffea00015a2e10 ffffea0000fa8010
head: ffff888056642000 0000000800100008 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5730, tgid 5730 (syz-executor), ts 49757414029
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]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x14c/0xad0 net/ipv6/route.c:3833
ip6_route_add+0x4b/0x1d0 net/ipv6/route.c:3962
addrconf_prefix_route+0x2fb/0x510 net/ipv6/addrconf.c:2504
inet6_addr_add+0x575/0x9a0 net/ipv6/addrconf.c:3077
inet6_rtm_newaddr+0x147a/0x1bb0 net/ipv6/addrconf.c:5095
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:7132
netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2556
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1345
page_owner free stack trace missing
Memory state around the buggy address:
ffff888056643380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888056643400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888056643480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888056643500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888056643580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: f5 cmc
1: 53 push %rbx
2: 48 8b 74 24 10 mov 0x10(%rsp),%rsi
7: 48 89 fb mov %rdi,%rbx
a: 48 83 c7 18 add $0x18,%rdi
e: e8 86 7e 1c f6 call 0xf61c7e99
13: 48 89 df mov %rbx,%rdi
16: e8 9e d4 1c f6 call 0xf61cd4b9
1b: f7 c5 00 02 00 00 test $0x200,%ebp
21: 75 23 jne 0x46
23: 9c pushf
24: 58 pop %rax
25: f6 c4 02 test $0x2,%ah
28: 75 37 jne 0x61
* 2a: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction
2f: e8 c5 dd 0b f6 call 0xf60bddf9
34: 65 48 83 3d 64 05 be cmpq $0x0,%gs:0x8be0564(%rip) # 0x8be05a1
3b: 08 00
3d: 74 16 je 0x55
3f: 5b pop %rbx