================================================================== 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 49201 at addr ffff8881102a8000 by task kworker/1:3/2654 CPU: 1 PID: 2654 Comm: kworker/1:3 Not tainted 5.10.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_power_efficient gc_worker 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:rcu_is_watching+0x0/0x60 kernel/rcu/tree.c:1098 Code: 24 08 48 89 34 24 e8 bf f1 3d 00 48 8b 54 24 08 48 8b 34 24 eb ba 48 89 d7 48 89 14 24 e8 c8 f1 3d 00 48 8b 14 24 eb c8 66 90 <53> 65 ff 05 e8 7f d5 7e 48 c7 c3 40 3b 03 00 65 48 03 1d 41 26 d5 RSP: 0018:ffffc90000227ca0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff84c513fc RDX: ffff888101693280 RSI: ffffffff84c5188e RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: ffffffff898c8517 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000010000 R14: 0000000000000000 R15: 0000000000000000 rcu_read_unlock include/linux/rcupdate.h:691 [inline] gc_worker+0x903/0xc50 net/netfilter/nf_conntrack_core.c:1420 process_one_work+0x933/0x1520 kernel/workqueue.c:2272 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418 kthread+0x38c/0x460 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 The buggy address belongs to the page: page:000000005a13f274 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1102a8 head:000000005a13f274 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: ffff8881102aff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881102aff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881102b0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881102b0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881102b0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================