================================================================== BUG: KASAN: use-after-free in ath9k_wmi_ctrl_rx+0x416/0x500 drivers/net/wireless/ath/ath9k/wmi.c:235 Read of size 1 at addr ffff8881d33c817c by task kworker/0:7/3248 CPU: 0 PID: 3248 Comm: kworker/0:7 Not tainted 5.6.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events request_firmware_work_func 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:374 __kasan_report.cold+0x37/0x77 mm/kasan/report.c:506 kasan_report+0xe/0x20 mm/kasan/common.c:641 ath9k_wmi_ctrl_rx+0x416/0x500 drivers/net/wireless/ath/ath9k/wmi.c:235 ath9k_htc_rx_msg+0x2d9/0xb00 drivers/net/wireless/ath/ath9k/htc_hst.c:459 ath9k_hif_usb_reg_in_cb+0x1a6/0x620 drivers/net/wireless/ath/ath9k/hif_usb.c:724 __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+0x1258/0x32ae drivers/usb/gadget/udc/dummy_hcd.c:1966 call_timer_fn+0x195/0x6f0 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x5f9/0x1500 kernel/time/timer.c:1786 __do_softirq+0x21e/0x950 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:1146 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:163 [inline] RIP: 0010:unwind_next_frame+0x20c/0x19e0 arch/x86/kernel/unwind_orc.c:407 Code: 53 ff 39 d0 0f 83 91 04 00 00 48 ba 00 00 00 00 00 fc ff df 89 c6 48 8d 3c b5 78 76 89 88 49 89 f8 49 c1 e8 03 45 0f b6 04 10 <48> 89 fa 83 e2 07 83 c2 03 44 38 c2 7c 32 45 84 c0 74 2d 48 89 74 RSP: 0018:ffff8881cc6a7738 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff13 RAX: 0000000000002f45 RBX: ffff8881cc6a7810 RCX: ffffffff812f451b RDX: dffffc0000000000 RSI: 0000000000002f45 RDI: ffffffff888a338c RBP: 1ffff110398d4eef R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000322d R11: 000000000004c01a R12: ffff8881cc6a7845 R13: ffff8881cc6a7860 R14: ffff8881cc6a7858 R15: 0000000000000001 arch_stack_walk+0x74/0xd0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123 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 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc_node mm/slub.c:2786 [inline] slab_alloc mm/slub.c:2794 [inline] __kmalloc+0xfe/0x370 mm/slub.c:3837 kmalloc include/linux/slab.h:560 [inline] usb_alloc_urb+0x65/0xb0 drivers/usb/core/urb.c:74 ath9k_hif_usb_alloc_reg_in_urbs drivers/net/wireless/ath/ath9k/hif_usb.c:929 [inline] ath9k_hif_usb_alloc_urbs+0xb2c/0x1030 drivers/net/wireless/ath/ath9k/hif_usb.c:995 ath9k_hif_usb_dev_init drivers/net/wireless/ath/ath9k/hif_usb.c:1081 [inline] ath9k_hif_usb_firmware_cb+0x142/0x500 drivers/net/wireless/ath/ath9k/hif_usb.c:1214 request_firmware_work_func+0x126/0x242 drivers/base/firmware_loader/main.c:976 process_one_work+0x94b/0x1620 kernel/workqueue.c:2266 worker_thread+0x96/0xe20 kernel/workqueue.c:2412 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 173: 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 kmalloc include/linux/slab.h:555 [inline] kzalloc include/linux/slab.h:669 [inline] ath9k_init_wmi+0x40/0x310 drivers/net/wireless/ath/ath9k/wmi.c:95 ath9k_htc_probe_device+0x21b/0x300 drivers/net/wireless/ath/ath9k/htc_drv_init.c:953 ath9k_htc_hw_init+0x31/0x60 drivers/net/wireless/ath/ath9k/htc_hst.c:501 ath9k_hif_usb_firmware_cb+0x26b/0x500 drivers/net/wireless/ath/ath9k/hif_usb.c:1218 request_firmware_work_func+0x126/0x242 drivers/base/firmware_loader/main.c:976 process_one_work+0x94b/0x1620 kernel/workqueue.c:2266 worker_thread+0x96/0xe20 kernel/workqueue.c:2412 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Freed by task 173: 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+0x117/0x160 mm/kasan/common.c:476 slab_free_hook mm/slub.c:1444 [inline] slab_free_freelist_hook mm/slub.c:1477 [inline] slab_free mm/slub.c:3034 [inline] kfree+0xd5/0x300 mm/slub.c:3995 ath9k_htc_probe_device.cold+0x53/0x2103 drivers/net/wireless/ath/ath9k/htc_drv_init.c:975 ath9k_htc_hw_init+0x31/0x60 drivers/net/wireless/ath/ath9k/htc_hst.c:501 ath9k_hif_usb_firmware_cb+0x26b/0x500 drivers/net/wireless/ath/ath9k/hif_usb.c:1218 request_firmware_work_func+0x126/0x242 drivers/base/firmware_loader/main.c:976 process_one_work+0x94b/0x1620 kernel/workqueue.c:2266 worker_thread+0x96/0xe20 kernel/workqueue.c:2412 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8881d33c8000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 380 bytes inside of 2048-byte region [ffff8881d33c8000, ffff8881d33c8800) The buggy address belongs to the page: page:ffffea00074cf200 refcount:1 mapcount:0 mapping:ffff8881da00c000 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 0000000000000000 0000000300000001 ffff8881da00c000 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d33c8000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d33c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881d33c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881d33c8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d33c8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================