================================================================== BUG: KASAN: use-after-free in ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:636 [inline] BUG: KASAN: use-after-free in ath9k_hif_usb_rx_cb+0xdab/0x1020 drivers/net/wireless/ath/ath9k/hif_usb.c:680 Read of size 4 at addr ffff8881079b40b8 by task systemd-journal/2635 CPU: 0 PID: 2635 Comm: systemd-journal 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 ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:636 [inline] ath9k_hif_usb_rx_cb+0xdab/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:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:196 Code: ff ff b9 ff ff ff ff b8 08 00 00 00 4d 8b 0b 48 0f bd c8 49 8b 14 24 48 63 c9 e9 66 ff ff ff 4c 01 ca 49 89 13 e9 12 fd ff ff <65> 48 8b 14 25 40 ef 01 00 65 8b 05 b0 22 c3 7e a9 00 01 ff 00 48 RSP: 0018:ffffc90000277ad0 EFLAGS: 00000206 RAX: 0000000001caa6f3 RBX: 000000000000cc41 RCX: ffffffff8125c7f7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff812898ac RBP: 000000000000db01 R08: 0000000000000001 R09: ffffffff898ca517 R10: fffffbfff13194a2 R11: 0000000000000000 R12: 0000000000000041 R13: 0000000000000000 R14: ffff888109d2c070 R15: ffffffff81289790 devkmsg_poll+0x122/0x1d0 kernel/printk/printk.c:879 vfs_poll include/linux/poll.h:90 [inline] ep_item_poll+0x14a/0x3e0 fs/eventpoll.c:885 ep_send_events_proc+0x273/0xc50 fs/eventpoll.c:1742 ep_scan_ready_list+0x256/0x7d0 fs/eventpoll.c:712 ep_send_events fs/eventpoll.c:1786 [inline] ep_poll fs/eventpoll.c:1942 [inline] do_epoll_wait+0xb2f/0x10a0 fs/eventpoll.c:2323 __do_sys_epoll_wait fs/eventpoll.c:2333 [inline] __se_sys_epoll_wait fs/eventpoll.c:2330 [inline] __x64_sys_epoll_wait+0x93/0xf0 fs/eventpoll.c:2330 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fadbb109303 Code: 49 89 ca b8 e8 00 00 00 0f 05 48 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 0b c2 00 00 48 89 04 24 49 89 ca b8 e8 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 51 c2 00 00 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffcd7ce4b50 EFLAGS: 00000293 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 000055f335a691e0 RCX: 00007fadbb109303 RDX: 0000000000000014 RSI: 00007ffcd7ce4b60 RDI: 0000000000000008 RBP: 00007ffcd7ce4d50 R08: 000055f335a6b2e0 R09: 00007ffcd7d8c080 R10: 00000000ffffffff R11: 0000000000000293 R12: 00007ffcd7ce4b60 R13: 0000000000000001 R14: ffffffffffffffff R15: 0005b39ddc8a8f74 The buggy address belongs to the page: page:000000003996d2b5 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1079b4 flags: 0x200000000000000() raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881079b3f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881079b4000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8881079b4080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8881079b4100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881079b4180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================