================================================================== BUG: KASAN: slab-out-of-bounds in ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:580 [inline] BUG: KASAN: slab-out-of-bounds in ath9k_hif_usb_rx_cb+0xad3/0xf90 drivers/net/wireless/ath/ath9k/hif_usb.c:666 Read of size 4 at addr ffff8881c4d240dc by task swapper/1/0 CPU: 1 PID: 0 Comm: swapper/1 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 ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:580 [inline] ath9k_hif_usb_rx_cb+0xad3/0xf90 drivers/net/wireless/ath/ath9k/hif_usb.c:666 __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:ffff8881da227da8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff8881da20b180 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8881da20b9fc RBP: ffffed103b441630 R08: ffff8881da20b180 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000001 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_secondary+0x2ae/0x390 arch/x86/kernel/smpboot.c:268 secondary_startup_64+0xb6/0xc0 arch/x86/kernel/head_64.S:242 Allocated by task 5470: 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 kmalloc include/linux/slab.h:555 [inline] kzalloc include/linux/slab.h:669 [inline] dev_new drivers/usb/gadget/legacy/raw_gadget.c:182 [inline] raw_open+0x8d/0x4d0 drivers/usb/gadget/legacy/raw_gadget.c:372 misc_open+0x372/0x4a0 drivers/char/misc.c:141 chrdev_open+0x219/0x5c0 fs/char_dev.c:414 do_dentry_open+0x4ac/0x1160 fs/open.c:797 do_open fs/namei.c:3229 [inline] path_openat+0x1a0b/0x2740 fs/namei.c:3346 do_filp_open+0x192/0x260 fs/namei.c:3373 do_sys_openat2+0x585/0x7d0 fs/open.c:1148 do_sys_open+0xc3/0x140 fs/open.c:1164 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8881c4d24000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 220 bytes inside of 4096-byte region [ffff8881c4d24000, ffff8881c4d25000) The buggy address belongs to the page: page:ffffea0007134800 refcount:1 mapcount:0 mapping:0000000088166035 index:0x0 head:ffffea0007134800 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881c4d23f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881c4d24000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881c4d24080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8881c4d24100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881c4d24180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================