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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+0xdb4/0x1050 drivers/net/wireless/ath/ath9k/hif_usb.c:671
Read of size 4 at addr ffff8881c7e74090 by task kworker/0:3/3065

CPU: 0 PID: 3065 Comm: kworker/0:3 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events request_firmware_work_func
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xf6/0x16e lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd3/0x415 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+0xdb4/0x1050 drivers/net/wireless/ath/ath9k/hif_usb.c:671
 __usb_hcd_giveback_urb+0x29a/0x550 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1716
 dummy_timer+0x125e/0x32b4 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 kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x5e5/0x14c0 kernel/time/timer.c:1786
 __do_softirq+0x21e/0x996 kernel/softirq.c:292
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __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+0x109/0x140 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+0x16f/0x1a0 kernel/softirq.c:429
 sysvec_apic_timer_interrupt+0xd3/0x1b0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline]
RIP: 0010:console_unlock+0xa62/0xc90 kernel/printk/printk.c:2511
Code: 00 89 ee 48 c7 c7 e0 c1 14 87 e8 69 b8 03 00 65 ff 0d 32 bb d8 7e e9 be f9 ff ff e8 48 3b 16 00 e8 53 9f 1b 00 ff 74 24 30 9d <e9> 20 fe ff ff e8 34 3b 16 00 48 8d 7d 08 48 89 f8 48 c1 e8 03 42
RSP: 0018:ffff8881cf32fa30 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 1ffffffff0fd4d12
RDX: 1ffff1103a11b107 RSI: 0000000000000000 RDI: ffff8881d08d8838
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff89392667 R11: fffffbfff12724cc R12: ffffffff82ac61d0
R13: ffffffff874f3a50 R14: 0000000000000042 R15: dffffc0000000000
 vprintk_emit+0x16d/0x3d0 kernel/printk/printk.c:2031
 vprintk_func+0x8b/0x133 kernel/printk/printk_safe.c:393
 printk+0xba/0xed kernel/printk/printk.c:2080
 ath9k_htc_hw_init.cold+0x17/0x22 drivers/net/wireless/ath/ath9k/htc_hst.c:502
 ath9k_hif_usb_firmware_cb+0x274/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1218
 request_firmware_work_func+0x126/0x242 drivers/base/firmware_loader/main.c:1001
 process_one_work+0x965/0x1620 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x352/0x460 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

Allocated by task 129:
 save_stack+0x1b/0x40 mm/kasan/common.c:48
 set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc mm/kasan/common.c:494 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:467
 slab_post_alloc_hook mm/slab.h:586 [inline]
 slab_alloc_node mm/slub.c:2824 [inline]
 slab_alloc mm/slub.c:2832 [inline]
 kmem_cache_alloc+0xd8/0x300 mm/slub.c:2837
 getname_flags fs/namei.c:138 [inline]
 getname_flags+0xd2/0x5b0 fs/namei.c:128
 user_path_at_empty+0x2a/0x50 fs/namei.c:2646
 do_readlinkat+0xcd/0x300 fs/stat.c:419
 __do_sys_readlink fs/stat.c:452 [inline]
 __se_sys_readlink fs/stat.c:449 [inline]
 __x64_sys_readlink+0x74/0xb0 fs/stat.c:449
 do_syscall_64+0x50/0x90 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 129:
 save_stack+0x1b/0x40 mm/kasan/common.c:48
 set_track mm/kasan/common.c:56 [inline]
 kasan_set_free_info mm/kasan/common.c:316 [inline]
 __kasan_slab_free+0x117/0x160 mm/kasan/common.c:455
 slab_free_hook mm/slub.c:1474 [inline]
 slab_free_freelist_hook mm/slub.c:1507 [inline]
 slab_free mm/slub.c:3072 [inline]
 kmem_cache_free+0x9b/0x360 mm/slub.c:3088
 putname+0xe1/0x120 fs/namei.c:259
 filename_lookup+0x282/0x3e0 fs/namei.c:2376
 do_readlinkat+0xcd/0x300 fs/stat.c:419
 __do_sys_readlink fs/stat.c:452 [inline]
 __se_sys_readlink fs/stat.c:449 [inline]
 __x64_sys_readlink+0x74/0xb0 fs/stat.c:449
 do_syscall_64+0x50/0x90 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff8881c7e73300
 which belongs to the cache names_cache of size 4096
The buggy address is located 3472 bytes inside of
 4096-byte region [ffff8881c7e73300, ffff8881c7e74300)
The buggy address belongs to the page:
page:ffffea00071f9c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea00071f9c00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x200000000010200(slab|head)
raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da120000
raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881c7e73f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881c7e74000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881c7e74080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff8881c7e74100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881c7e74180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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