batman_adv: batadv0: Interface activated: batadv_slave_1
==================================================================
BUG: KASAN: use-after-free in tcindex_set_parms+0x17fd/0x1a00 net/sched/cls_tcindex.c:455
Write of size 16 at addr ffff88809eaf5530 by task syz-executor401/10855

CPU: 1 PID: 10855 Comm: syz-executor401 Not tainted 5.6.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd3/0x315 mm/kasan/report.c:374
 __kasan_report.cold+0x1a/0x32 mm/kasan/report.c:506
 kasan_report+0xe/0x20 mm/kasan/common.c:641
 tcindex_set_parms+0x17fd/0x1a00 net/sched/cls_tcindex.c:455
 tcindex_change+0x203/0x2e0 net/sched/cls_tcindex.c:518
 tc_new_tfilter+0xa59/0x20b0 net/sched/cls_api.c:2103
 rtnetlink_rcv_msg+0x810/0xad0 net/core/rtnetlink.c:5427
 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2478
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6b9/0x7d0 net/socket.c:2345
 ___sys_sendmsg+0x100/0x170 net/socket.c:2399
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2432
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x443ea9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 6b 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffdba01b678 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443ea9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 00007ffdba01b690 R08: 00000000bb1414ac R09: 00000000bb1414ac
R10: 00000000bb1414ac R11: 0000000000000246 R12: 00007ffdba01b6c0
R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 12:
 save_stack+0x1b/0x80 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc mm/kasan/common.c:515 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:488
 __do_kmalloc mm/slab.c:3656 [inline]
 __kmalloc+0x161/0x7a0 mm/slab.c:3665
 kmalloc include/linux/slab.h:560 [inline]
 usb_alloc_urb+0x65/0xb0 drivers/usb/core/urb.c:74
 usb_internal_control_msg drivers/usb/core/message.c:94 [inline]
 usb_control_msg+0x1c9/0x4a0 drivers/usb/core/message.c:152
 get_port_status drivers/usb/core/hub.c:572 [inline]
 hub_ext_port_status+0x125/0x460 drivers/usb/core/hub.c:589
 hub_port_status drivers/usb/core/hub.c:611 [inline]
 hub_activate+0x4f4/0x1640 drivers/usb/core/hub.c:1118
 process_one_work+0x94b/0x1690 kernel/workqueue.c:2266
 worker_thread+0x96/0xe20 kernel/workqueue.c:2412
 kthread+0x357/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Freed by task 12:
 save_stack+0x1b/0x80 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:337 [inline]
 __kasan_slab_free+0xf7/0x140 mm/kasan/common.c:476
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x109/0x2b0 mm/slab.c:3757
 urb_destroy drivers/usb/core/urb.c:26 [inline]
 kref_put include/linux/kref.h:65 [inline]
 usb_free_urb.part.0+0xaf/0x110 drivers/usb/core/urb.c:96
 usb_free_urb+0x1b/0x30 drivers/usb/core/urb.c:95
 usb_start_wait_urb+0x1e5/0x2b0 drivers/usb/core/message.c:79
 usb_internal_control_msg drivers/usb/core/message.c:101 [inline]
 usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152
 get_port_status drivers/usb/core/hub.c:572 [inline]
 hub_ext_port_status+0x125/0x460 drivers/usb/core/hub.c:589
 hub_port_status drivers/usb/core/hub.c:611 [inline]
 hub_activate+0x4f4/0x1640 drivers/usb/core/hub.c:1118
 process_one_work+0x94b/0x1690 kernel/workqueue.c:2266
 worker_thread+0x96/0xe20 kernel/workqueue.c:2412
 kthread+0x357/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

The buggy address belongs to the object at ffff88809eaf5500
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 48 bytes inside of
 192-byte region [ffff88809eaf5500, ffff88809eaf55c0)
The buggy address belongs to the page:
page:ffffea00027abd40 refcount:1 mapcount:0 mapping:ffff8880aa000000 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea00027a8ac8 ffffea00027ac048 ffff8880aa000000
raw: 0000000000000000 ffff88809eaf5000 0000000100000010 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809eaf5400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88809eaf5480: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88809eaf5500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff88809eaf5580: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88809eaf5600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================