================================================================== BUG: KASAN: use-after-free in memcpy include/linux/string.h:399 [inline] BUG: KASAN: use-after-free in ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:562 [inline] BUG: KASAN: use-after-free in ath9k_hif_usb_rx_cb+0x3ab/0x1020 drivers/net/wireless/ath/ath9k/hif_usb.c:680 Read of size 49384 at addr ffff88810dc90000 by task syz-executor.4/5031 CPU: 0 PID: 5031 Comm: syz-executor.4 Not tainted 5.10.0-rc2-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+0x107/0x163 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xae/0x4c8 mm/kasan/report.c:385 __kasan_report mm/kasan/report.c:545 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:562 check_memory_region_inline mm/kasan/generic.c:186 [inline] check_memory_region+0x13d/0x180 mm/kasan/generic.c:192 memcpy+0x20/0x60 mm/kasan/common.c:105 memcpy include/linux/string.h:399 [inline] ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:562 [inline] ath9k_hif_usb_rx_cb+0x3ab/0x1020 drivers/net/wireless/ath/ath9k/hif_usb.c:680 __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1728 dummy_timer+0x11f4/0x3280 drivers/usb/gadget/udc/dummy_hcd.c:1969 call_timer_fn+0x1a5/0x630 kernel/time/timer.c:1410 expire_timers kernel/time/timer.c:1455 [inline] __run_timers.part.0+0x67c/0xa10 kernel/time/timer.c:1747 __run_timers kernel/time/timer.c:1728 [inline] run_timer_softirq+0x80/0x120 kernel/time/timer.c:1760 __do_softirq+0x1b2/0x945 kernel/softirq.c:298 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x110/0x1a0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 RIP: 0010:_raw_spin_unlock_irq+0x27/0x30 kernel/locking/spinlock.c:200 Code: 44 00 00 55 48 8b 74 24 08 48 89 fd 48 8d 7f 18 e8 ae ba 89 fb 48 89 ef e8 46 78 8a fb e8 31 d5 a7 fb fb 65 ff 0d b9 51 65 7a <5d> c3 0f 1f 80 00 00 00 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 RSP: 0018:ffffc900011d7b58 EFLAGS: 00000282 RAX: 000000000303d661 RBX: ffff888137374bc0 RCX: 1ffffffff1079831 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff859c9d3f RBP: ffff8881f6a32dc0 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881f6a32dc0 R13: ffff88813383b280 R14: 0000000000000000 R15: 0000000000000001 finish_lock_switch kernel/sched/core.c:3513 [inline] finish_task_switch+0x11d/0x5d0 kernel/sched/core.c:3613 context_switch kernel/sched/core.c:3777 [inline] __schedule+0x8aa/0x1f30 kernel/sched/core.c:4523 schedule+0xcb/0x270 kernel/sched/core.c:4601 freezable_schedule include/linux/freezer.h:172 [inline] do_nanosleep+0x1b1/0x660 kernel/time/hrtimer.c:1878 hrtimer_nanosleep+0x1f9/0x430 kernel/time/hrtimer.c:1931 __do_sys_nanosleep kernel/time/hrtimer.c:1965 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1952 [inline] __x64_sys_nanosleep+0x1dc/0x260 kernel/time/hrtimer.c:1952 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c360 Code: c0 5b 5d c3 66 0f 1f 44 00 00 8b 04 24 48 83 c4 18 5b 5d c3 66 0f 1f 44 00 00 83 3d f1 f2 24 01 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 34 cf fb ff c3 48 83 ec 08 e8 0a 47 00 00 RSP: 002b:00007fff733e24b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 0000000000272ecc RCX: 000000000045c360 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fff733e24c0 RBP: 0000000000000921 R08: 0000000000000001 R09: 0000000001710940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 00007fff733e2510 R14: 0000000000272589 R15: 00007fff733e2520 The buggy address belongs to the page: page:0000000075648f5d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10dc90 head:0000000075648f5d order:3 compound_mapcount:0 compound_pincount:0 flags: 0x200000000010000(head) raw: 0200000000010000 dead000000000100 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88810dc97f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88810dc97f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88810dc98000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88810dc98080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810dc98100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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