On Sat, Apr 11, 2020 at 1:09 PM syzbot <syzbot+809d3bdcdb4650cdbc83@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: 0fa84af8 Merge tag 'usb-serial-5.7-rc1' of https://git.ker.. > git tree: https://github.com/google/kasan.git usb-fuzzer > console output: https://syzkaller.appspot.com/x/log.txt?x=10af83b3e00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=6b9c154b0c23aecf > dashboard link: https://syzkaller.appspot.com/bug?extid=809d3bdcdb4650cdbc83 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > Unfortunately, I don't have any reproducer for this crash yet. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+809d3bdcdb4650cdbc83@xxxxxxxxxxxxxxxxxxxxxxxxx > > ================================================================== > BUG: KASAN: use-after-free in ath9k_htc_txcompletion_cb+0x285/0x2b0 drivers/net/wireless/ath/ath9k/htc_hst.c:341 > Read of size 8 at addr ffff8881d1caf488 by task kworker/0:0/24267 > > CPU: 0 PID: 24267 Comm: kworker/0:0 Not tainted 5.6.0-rc7-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+0xef/0x16e lib/dump_stack.c:118 > print_address_description.constprop.0.cold+0xd3/0x314 mm/kasan/report.c:374 > __kasan_report.cold+0x37/0x77 mm/kasan/report.c:506 > kasan_report+0xe/0x20 mm/kasan/common.c:641 > ath9k_htc_txcompletion_cb+0x285/0x2b0 drivers/net/wireless/ath/ath9k/htc_hst.c:341 > hif_usb_regout_cb+0x10b/0x1b0 drivers/net/wireless/ath/ath9k/hif_usb.c:90 > __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+0x1258/0x32ae drivers/usb/gadget/udc/dummy_hcd.c:1966 > call_timer_fn+0x195/0x6f0 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+0x5f9/0x1500 kernel/time/timer.c:1786 > __do_softirq+0x21e/0x950 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:1146 > apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 > </IRQ> > RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline] > RIP: 0010:console_unlock+0xa6b/0xca0 kernel/printk/printk.c:2481 > Code: 00 89 ee 48 c7 c7 60 3e 14 87 e8 10 c3 03 00 65 ff 0d c1 ed d8 7e e9 b5 f9 ff ff e8 0f 37 16 00 e8 0a 7f 1b 00 ff 74 24 30 9d <e9> fd fd ff ff e8 fb 36 16 00 48 8d 7d 08 48 89 f8 48 c1 e8 03 42 > RSP: 0018:ffff8881d9227a50 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 > RAX: 0000000000000007 RBX: 0000000000000200 RCX: 0000000000000006 > RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881aba6d1cc > RBP: 0000000000000000 R08: ffff8881aba6c980 R09: fffffbfff1266485 > R10: fffffbfff1266484 R11: ffffffff89332427 R12: ffffffff82a092b0 > R13: ffffffff874d3950 R14: 0000000000000057 R15: dffffc0000000000 > vprintk_emit+0x171/0x3d0 kernel/printk/printk.c:1996 > vprintk_func+0x75/0x113 kernel/printk/printk_safe.c:386 > printk+0xba/0xed kernel/printk/printk.c:2056 > ath9k_htc_hw_init.cold+0x17/0x2a drivers/net/wireless/ath/ath9k/htc_hst.c:502 > ath9k_hif_usb_firmware_cb+0x26b/0x500 drivers/net/wireless/ath/ath9k/hif_usb.c:1187 > request_firmware_work_func+0x126/0x242 drivers/base/firmware_loader/main.c:976 > process_one_work+0x94b/0x1620 kernel/workqueue.c:2266 > worker_thread+0x96/0xe20 kernel/workqueue.c:2412 > kthread+0x318/0x420 kernel/kthread.c:255 > ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 > > Allocated by task 24267: > save_stack+0x1b/0x80 mm/kasan/common.c:72 > set_track mm/kasan/common.c:80 [inline] > __kasan_kmalloc mm/kasan/common.c:515 [inline] > __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:488 > slab_post_alloc_hook mm/slab.h:584 [inline] > slab_alloc_node mm/slub.c:2786 [inline] > kmem_cache_alloc_node+0xdc/0x330 mm/slub.c:2822 > __alloc_skb+0xba/0x5a0 net/core/skbuff.c:198 > alloc_skb include/linux/skbuff.h:1081 [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/0x1d80 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+0x26b/0x500 drivers/net/wireless/ath/ath9k/hif_usb.c:1187 > request_firmware_work_func+0x126/0x242 drivers/base/firmware_loader/main.c:976 > process_one_work+0x94b/0x1620 kernel/workqueue.c:2266 > worker_thread+0x96/0xe20 kernel/workqueue.c:2412 > kthread+0x318/0x420 kernel/kthread.c:255 > ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 > > Freed by task 24267: > save_stack+0x1b/0x80 mm/kasan/common.c:72 > set_track mm/kasan/common.c:80 [inline] > kasan_set_free_info mm/kasan/common.c:337 [inline] > __kasan_slab_free+0x117/0x160 mm/kasan/common.c:476 > slab_free_hook mm/slub.c:1444 [inline] > slab_free_freelist_hook mm/slub.c:1477 [inline] > slab_free mm/slub.c:3034 [inline] > kmem_cache_free+0x9b/0x360 mm/slub.c:3050 > 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/0x1d80 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+0x26b/0x500 drivers/net/wireless/ath/ath9k/hif_usb.c:1187 > request_firmware_work_func+0x126/0x242 drivers/base/firmware_loader/main.c:976 > process_one_work+0x94b/0x1620 kernel/workqueue.c:2266 > worker_thread+0x96/0xe20 kernel/workqueue.c:2412 > kthread+0x318/0x420 kernel/kthread.c:255 > ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 > > The buggy address belongs to the object at ffff8881d1caf3c0 > which belongs to the cache skbuff_head_cache of size 224 > The buggy address is located 200 bytes inside of > 224-byte region [ffff8881d1caf3c0, ffff8881d1caf4a0) > The buggy address belongs to the page: > page:ffffea0007472bc0 refcount:1 mapcount:0 mapping:ffff8881da16b400 index:0xffff8881d1caf280 > flags: 0x200000000000200(slab) > raw: 0200000000000200 ffffea00074473c0 0000000900000009 ffff8881da16b400 > raw: ffff8881d1caf280 00000000800c000b 00000001ffffffff 0000000000000000 > page dumped because: kasan: bad access detected > > Memory state around the buggy address: > ffff8881d1caf380: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb > ffff8881d1caf400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > >ffff8881d1caf480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc > ^ > ffff8881d1caf500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff8881d1caf580: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc > ================================================================== > > > --- > This bug is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. #syz dup: KASAN: use-after-free Read in hif_usb_regout_cb
