================================================================== BUG: KASAN: slab-out-of-bounds in ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:627 [inline] BUG: KASAN: slab-out-of-bounds in ath9k_hif_usb_rx_cb+0xd7d/0xf80 drivers/net/wireless/ath/ath9k/hif_usb.c:671 Read of size 4 at addr ffff8881d89d4090 by task syz-executor.5/11759 CPU: 0 PID: 11759 Comm: syz-executor.5 Not tainted 5.8.0-rc3-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+0xf6/0x16e lib/dump_stack.c:118 print_address_description.constprop.0+0x1a/0x210 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x37/0x7c mm/kasan/report.c:530 ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:627 [inline] ath9k_hif_usb_rx_cb+0xd7d/0xf80 drivers/net/wireless/ath/ath9k/hif_usb.c:671 __usb_hcd_giveback_urb+0x32d/0x560 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1716 dummy_timer+0x11f2/0x3240 drivers/usb/gadget/udc/dummy_hcd.c:1967 call_timer_fn+0x1ac/0x6e0 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers.part.0+0x54c/0x9e0 kernel/time/timer.c:1773 __run_timers kernel/time/timer.c:1745 [inline] run_timer_softirq+0x80/0x120 kernel/time/timer.c:1786 __do_softirq+0x222/0x95b kernel/softirq.c:292 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0xed/0x140 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:387 [inline] __irq_exit_rcu kernel/softirq.c:417 [inline] irq_exit_rcu+0x150/0x1f0 kernel/softirq.c:429 sysvec_apic_timer_interrupt+0x49/0xc0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596 RIP: 0010:lock_acquire+0x1d3/0x940 kernel/locking/lockdep.c:4931 Code: b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 40 06 00 00 83 ab 84 08 00 00 01 0f 85 08 05 00 00 ff 74 24 08 9d <48> b8 00 00 00 00 00 fc ff df 48 03 44 24 10 48 c7 00 00 00 00 00 RSP: 0018:ffff8881c5ccf5f0 EFLAGS: 00000246 RAX: 0000000000000007 RBX: ffff8881c7eb9900 RCX: 0000000000000001 RDX: 0000000000000000 RSI: d95ec60303cdf779 RDI: ffff8881c7eba184 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff895ad667 R10: fffffbfff12b5acc R11: 0000000000000001 R12: 0000000000000002 R13: ffffffff873124a0 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:241 [inline] rcu_read_lock include/linux/rcupdate.h:634 [inline] lock_page_memcg+0x65/0x260 mm/memcontrol.c:1977 page_remove_rmap+0x21/0x7b0 mm/rmap.c:1328 zap_pte_range mm/memory.c:1089 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0xe0f/0x1de0 mm/memory.c:1264 unmap_single_vma+0x198/0x300 mm/memory.c:1309 unmap_vmas+0x174/0x2f0 mm/memory.c:1341 exit_mmap+0x27f/0x4d0 mm/mmap.c:3150 __mmput kernel/fork.c:1093 [inline] mmput+0xce/0x3d0 kernel/fork.c:1114 exit_mm kernel/exit.c:482 [inline] do_exit+0xac1/0x28f0 kernel/exit.c:792 do_group_exit+0x125/0x310 kernel/exit.c:903 get_signal+0x42d/0x1fd0 kernel/signal.c:2739 do_signal+0x88/0x1a00 arch/x86/kernel/signal.c:810 exit_to_usermode_loop arch/x86/entry/common.c:212 [inline] __prepare_exit_to_usermode+0x169/0x1a0 arch/x86/entry/common.c:246 do_syscall_64+0x5c/0x90 arch/x86/entry/common.c:368 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007ffca8349938 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffdfc RBX: 0000000000000be5 RCX: 000000000045cb29 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000078bf0c RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffca8349a20 R11: 0000000000000246 R12: 00000000000003e8 R13: 0000000000073ae8 R14: 0000000000072f03 R15: 000000000078bf0c Allocated by task 0: (stack is not available) Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8881d89d3300 which belongs to the cache names_cache of size 4096 The buggy address is located 3472 bytes inside of 4096-byte region [ffff8881d89d3300, ffff8881d89d4300) The buggy address belongs to the page: page:ffffea0007627400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea0007627400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da120000 raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d89d3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881d89d4000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881d89d4080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881d89d4100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881d89d4180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================