================================================================== BUG: KASAN: use-after-free in htc_process_conn_rsp drivers/net/wireless/ath/ath9k/htc_hst.c:131 [inline] BUG: KASAN: use-after-free in ath9k_htc_rx_msg+0xa25/0xaf0 drivers/net/wireless/ath/ath9k/htc_hst.c:443 Write of size 2 at addr ffff8881adbc57f0 by task swapper/0/0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc5-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+0xef/0x16e lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd3/0x314 mm/kasan/report.c:382 __kasan_report.cold+0x37/0x92 mm/kasan/report.c:511 kasan_report+0x33/0x50 mm/kasan/common.c:625 htc_process_conn_rsp drivers/net/wireless/ath/ath9k/htc_hst.c:131 [inline] ath9k_htc_rx_msg+0xa25/0xaf0 drivers/net/wireless/ath/ath9k/htc_hst.c:443 ath9k_hif_usb_reg_in_cb+0x1c0/0x630 drivers/net/wireless/ath/ath9k/hif_usb.c:718 __usb_hcd_giveback_urb+0x1f2/0x470 drivers/usb/core/hcd.c:1648 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1713 dummy_timer+0x125e/0x32b4 drivers/usb/gadget/udc/dummy_hcd.c:1966 call_timer_fn+0x1ac/0x700 kernel/time/timer.c:1405 expire_timers kernel/time/timer.c:1450 [inline] __run_timers kernel/time/timer.c:1774 [inline] __run_timers kernel/time/timer.c:1741 [inline] run_timer_softirq+0x5f9/0x1500 kernel/time/timer.c:1787 __do_softirq+0x21e/0x9aa kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x178/0x1a0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x141/0x540 arch/x86/kernel/apic/apic.c:1140 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:default_idle+0x28/0x300 arch/x86/kernel/process.c:698 Code: cc cc 41 56 41 55 65 44 8b 2d 24 83 6b 7a 41 54 55 53 0f 1f 44 00 00 e8 06 69 af fb e9 07 00 00 00 0f 00 2d 0a 25 4c 00 fb f4 <65> 44 8b 2d 00 83 6b 7a 0f 1f 44 00 00 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffffff87007da0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffffffff8702f800 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffffff8703007c RBP: fffffbfff0e05f00 R08: ffffffff8702f800 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff87e88e80 R15: 0000000000000000 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x3e0/0x500 kernel/sched/idle.c:269 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361 start_kernel+0x9bb/0x9f5 init/main.c:1038 secondary_startup_64+0xb6/0xc0 arch/x86/kernel/head_64.S:242 Allocated by task 6769: save_stack+0x1b/0x40 mm/kasan/common.c:49 set_track mm/kasan/common.c:57 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468 slab_post_alloc_hook mm/slab.h:586 [inline] slab_alloc_node mm/slub.c:2797 [inline] slab_alloc mm/slub.c:2805 [inline] __kmalloc_track_caller+0xf0/0x330 mm/slub.c:4404 kmemdup+0x23/0x50 mm/util.c:127 kmemdup include/linux/string.h:454 [inline] neigh_sysctl_register+0x9a/0x680 net/core/neighbour.c:3628 addrconf_sysctl_register+0xb6/0x1d0 net/ipv6/addrconf.c:6991 ipv6_add_dev net/ipv6/addrconf.c:445 [inline] ipv6_add_dev+0x9fe/0x1120 net/ipv6/addrconf.c:365 addrconf_notify+0xb68/0x2360 net/ipv6/addrconf.c:3503 notifier_call_chain+0xc0/0x230 kernel/notifier.c:83 call_netdevice_notifiers_info net/core/dev.c:1948 [inline] call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1933 call_netdevice_notifiers_extack net/core/dev.c:1960 [inline] call_netdevice_notifiers net/core/dev.c:1974 [inline] register_netdevice+0xd75/0x10b0 net/core/dev.c:9423 register_netdev+0x2d/0x50 net/core/dev.c:9516 usbnet_probe+0x1752/0x2590 drivers/net/usb/usbnet.c:1805 usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:374 really_probe+0x290/0xac0 drivers/base/dd.c:520 driver_probe_device+0x223/0x350 drivers/base/dd.c:697 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:804 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431 __device_attach+0x21a/0x390 drivers/base/dd.c:870 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0x1367/0x1c40 drivers/base/core.c:2538 usb_set_configuration+0xed4/0x1850 drivers/usb/core/message.c:2032 usb_generic_driver_probe+0x9d/0xe0 drivers/usb/core/generic.c:241 usb_probe_device+0xd9/0x230 drivers/usb/core/driver.c:272 really_probe+0x290/0xac0 drivers/base/dd.c:520 driver_probe_device+0x223/0x350 drivers/base/dd.c:697 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:804 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431 __device_attach+0x21a/0x390 drivers/base/dd.c:870 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0x1367/0x1c40 drivers/base/core.c:2538 usb_new_device.cold+0x552/0xf6e drivers/usb/core/hub.c:2553 hub_port_connect drivers/usb/core/hub.c:5207 [inline] hub_port_connect_change drivers/usb/core/hub.c:5347 [inline] port_event drivers/usb/core/hub.c:5493 [inline] hub_event+0x226d/0x43c0 drivers/usb/core/hub.c:5575 process_one_work+0x965/0x1630 kernel/workqueue.c:2268 process_scheduled_works kernel/workqueue.c:2330 [inline] worker_thread+0x7ab/0xe20 kernel/workqueue.c:2416 kthread+0x326/0x430 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Freed by task 6769: save_stack+0x1b/0x40 mm/kasan/common.c:49 set_track mm/kasan/common.c:57 [inline] kasan_set_free_info mm/kasan/common.c:317 [inline] __kasan_slab_free+0x117/0x160 mm/kasan/common.c:456 slab_free_hook mm/slub.c:1455 [inline] slab_free_freelist_hook mm/slub.c:1488 [inline] slab_free mm/slub.c:3045 [inline] kfree+0xd5/0x300 mm/slub.c:4026 neigh_sysctl_unregister+0x63/0x80 net/core/neighbour.c:3714 addrconf_ifdown+0xda0/0x1280 net/ipv6/addrconf.c:3861 addrconf_notify+0x7d5/0x2360 net/ipv6/addrconf.c:3643 notifier_call_chain+0xc0/0x230 kernel/notifier.c:83 call_netdevice_notifiers_info net/core/dev.c:1948 [inline] call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1933 call_netdevice_notifiers_extack net/core/dev.c:1960 [inline] call_netdevice_notifiers net/core/dev.c:1974 [inline] rollback_registered_many+0x7a6/0xec0 net/core/dev.c:8828 rollback_registered+0xf2/0x1c0 net/core/dev.c:8873 unregister_netdevice_queue net/core/dev.c:9969 [inline] unregister_netdevice_queue+0x1d7/0x2b0 net/core/dev.c:9962 unregister_netdevice include/linux/netdevice.h:2725 [inline] unregister_netdev+0x18/0x20 net/core/dev.c:10010 usbnet_disconnect+0xd8/0x270 drivers/net/usb/usbnet.c:1611 usb_unbind_interface+0x1bd/0x8a0 drivers/usb/core/driver.c:436 __device_release_driver drivers/base/dd.c:1110 [inline] device_release_driver_internal+0x432/0x500 drivers/base/dd.c:1141 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:533 device_del+0x481/0xd30 drivers/base/core.c:2715 usb_disable_device+0x23d/0x790 drivers/usb/core/message.c:1245 usb_disconnect+0x293/0x900 drivers/usb/core/hub.c:2216 hub_port_connect drivers/usb/core/hub.c:5058 [inline] hub_port_connect_change drivers/usb/core/hub.c:5347 [inline] port_event drivers/usb/core/hub.c:5493 [inline] hub_event+0x1abf/0x43c0 drivers/usb/core/hub.c:5575 process_one_work+0x965/0x1630 kernel/workqueue.c:2268 process_scheduled_works kernel/workqueue.c:2330 [inline] worker_thread+0x7ab/0xe20 kernel/workqueue.c:2416 kthread+0x326/0x430 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 The buggy address belongs to the object at ffff8881adbc5000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 2032 bytes inside of 2048-byte region [ffff8881adbc5000, ffff8881adbc5800) The buggy address belongs to the page: page:ffffea0006b6f000 refcount:1 mapcount:0 mapping:00000000b8966167 index:0x0 head:ffffea0006b6f000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c000 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881adbc5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881adbc5700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881adbc5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881adbc5800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881adbc5880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================