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BUG: KASAN: use-after-free in atomic_read include/asm-generic/atomic-instrumented.h:26 [inline]
BUG: KASAN: use-after-free in refcount_read include/linux/refcount.h:147 [inline]
BUG: KASAN: use-after-free in skb_unref include/linux/skbuff.h:1044 [inline]
BUG: KASAN: use-after-free in kfree_skb+0x32/0x3d0 net/core/skbuff.c:692
Read of size 4 at addr ffff8881cb623ad4 by task kworker/1:4/3090
CPU: 1 PID: 3090 Comm: kworker/1:4 Not tainted 5.7.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
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+0xd3/0x415 mm/kasan/report.c:382
__kasan_report.cold+0x37/0x7d mm/kasan/report.c:511
kasan_report+0x33/0x50 mm/kasan/common.c:625
check_memory_region_inline mm/kasan/generic.c:187 [inline]
check_memory_region+0x173/0x1d0 mm/kasan/generic.c:193
atomic_read include/asm-generic/atomic-instrumented.h:26 [inline]
refcount_read include/linux/refcount.h:147 [inline]
skb_unref include/linux/skbuff.h:1044 [inline]
kfree_skb+0x32/0x3d0 net/core/skbuff.c:692
hif_usb_regout_cb+0x156/0x1c0 drivers/net/wireless/ath/ath9k/hif_usb.c:97
__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/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:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline]
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1779 [inline]
RIP: 0010:vprintk_emit+0x3d0/0x3e0 kernel/printk/printk.c:2020
Code: 00 83 fb ff 75 d6 e9 d8 fc ff ff e8 7a 2f 16 00 e8 55 8c 1b 00 41 56 9d e9 aa fd ff ff e8 68 2f 16 00 e8 43 8c 1b 00 41 56 9d 2a ff ff ff 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 f5 53 48
RSP: 0018:ffff8881cdaa7400 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: 0000000000000200 RCX: 1ffffffff126ffea
RDX: 0000000000000000 RSI: ffff8881ac325310 RDI: ffff8881ac3252bc
RBP: ffff8881cdaa7448 R08: 0000000000000001 R09: fffffbfff126c8c6
R10: ffffffff8936462f R11: fffffbfff126c8c5 R12: 0000000000000079
R13: ffff8881ce380000 R14: 0000000000000212 R15: 0000000000000000
dev_vprintk_emit+0x4fc/0x541 drivers/base/core.c:3774
dev_printk_emit+0xba/0xf1 drivers/base/core.c:3785
__dev_printk+0x1db/0x203 drivers/base/core.c:3797
_dev_warn+0xd7/0x109 drivers/base/core.c:3841
usb_parse_interface drivers/usb/core/config.c:593 [inline]
usb_parse_configuration drivers/usb/core/config.c:795 [inline]
usb_get_configuration.cold+0x633/0x157f drivers/usb/core/config.c:944
usb_enumerate_device drivers/usb/core/hub.c:2387 [inline]
usb_new_device+0x42c/0x740 drivers/usb/core/hub.c:2523
hub_port_connect drivers/usb/core/hub.c:5208 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5348 [inline]
port_event drivers/usb/core/hub.c:5494 [inline]
hub_event+0x226d/0x43c0 drivers/usb/core/hub.c:5576
process_one_work+0x965/0x1630 kernel/workqueue.c:2268
worker_thread+0x96/0xe20 kernel/workqueue.c:2414
kthread+0x326/0x430 kernel/kthread.c:268
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
Allocated by task 95:
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
slab_post_alloc_hook mm/slab.h:586 [inline]
slab_alloc_node mm/slub.c:2797 [inline]
kmem_cache_alloc_node+0xdc/0x330 mm/slub.c:2833
__alloc_skb+0xba/0x5a0 net/core/skbuff.c:198
alloc_skb include/linux/skbuff.h:1083 [inline]
htc_connect_service+0x2cc/0x840 drivers/net/wireless/ath/ath9k/htc_hst.c:257
ath9k_wmi_connect+0xd2/0x1a0 drivers/net/wireless/ath/ath9k/wmi.c:265
ath9k_init_htc_services.constprop.0+0xb4/0x650 drivers/net/wireless/ath/ath9k/htc_drv_init.c:146
ath9k_htc_probe_device+0x25a/0x1da0 drivers/net/wireless/ath/ath9k/htc_drv_init.c:959
ath9k_htc_hw_init+0x31/0x60 drivers/net/wireless/ath/ath9k/htc_hst.c:501
ath9k_hif_usb_firmware_cb+0x274/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1187
request_firmware_work_func+0x126/0x242 drivers/base/firmware_loader/main.c:1005
process_one_work+0x965/0x1630 kernel/workqueue.c:2268
worker_thread+0x96/0xe20 kernel/workqueue.c:2414
kthread+0x326/0x430 kernel/kthread.c:268
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
Freed by task 95:
save_stack+0x1b/0x40 mm/kasan/common.c:49
set_track mm/kasan/common.c:57 [inline]
kasan_set_free_info mm/kasan/common.c:317 [inline]
__kasan_slab_free+0x117/0x160 mm/kasan/common.c:456
slab_free_hook mm/slub.c:1455 [inline]
slab_free_freelist_hook mm/slub.c:1488 [inline]
slab_free mm/slub.c:3045 [inline]
kmem_cache_free+0x9b/0x360 mm/slub.c:3061
kfree_skbmem net/core/skbuff.c:622 [inline]
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:616
__kfree_skb net/core/skbuff.c:679 [inline]
kfree_skb net/core/skbuff.c:696 [inline]
kfree_skb+0x102/0x3d0 net/core/skbuff.c:690
htc_connect_service.cold+0xa9/0x109 drivers/net/wireless/ath/ath9k/htc_hst.c:282
ath9k_wmi_connect+0xd2/0x1a0 drivers/net/wireless/ath/ath9k/wmi.c:265
ath9k_init_htc_services.constprop.0+0xb4/0x650 drivers/net/wireless/ath/ath9k/htc_drv_init.c:146
ath9k_htc_probe_device+0x25a/0x1da0 drivers/net/wireless/ath/ath9k/htc_drv_init.c:959
ath9k_htc_hw_init+0x31/0x60 drivers/net/wireless/ath/ath9k/htc_hst.c:501
ath9k_hif_usb_firmware_cb+0x274/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1187
request_firmware_work_func+0x126/0x242 drivers/base/firmware_loader/main.c:1005
process_one_work+0x965/0x1630 kernel/workqueue.c:2268
worker_thread+0x96/0xe20 kernel/workqueue.c:2414
kthread+0x326/0x430 kernel/kthread.c:268
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
The buggy address belongs to the object at ffff8881cb623a00
which belongs to the cache skbuff_head_cache of size 224
The buggy address is located 212 bytes inside of
224-byte region [ffff8881cb623a00, ffff8881cb623ae0)
The buggy address belongs to the page:
page:ffffea00072d88c0 refcount:1 mapcount:0 mapping:000000001d45bd97 index:0x0
flags: 0x200000000000200(slab)
raw: 0200000000000200 ffffea000724bb80 0000000500000005 ffff8881da175400
raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8881cb623980: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
ffff8881cb623a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881cb623a80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
^
ffff8881cb623b00: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
ffff8881cb623b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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