On Tue, Sep 3, 2019 at 2:08 PM syzbot <syzbot+b563b7f8dbe8223a51e8@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: eea39f24 usb-fuzzer: main usb gadget fuzzer driver > git tree: https://github.com/google/kasan.git usb-fuzzer > console output: https://syzkaller.appspot.com/x/log.txt?x=1031c5f2600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=d0c62209eedfd54e > dashboard link: https://syzkaller.appspot.com/bug?extid=b563b7f8dbe8223a51e8 > 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+b563b7f8dbe8223a51e8@xxxxxxxxxxxxxxxxxxxxxxxxx > > ================================================================== > BUG: KASAN: use-after-free in rsi_rx_done_handler+0x3ba/0x490 > drivers/net/wireless/rsi/rsi_91x_usb.c:267 > Read of size 8 at addr ffff8881cebc0fe8 by task kworker/0:2/102 > > CPU: 0 PID: 102 Comm: kworker/0:2 Not tainted 5.3.0-rc5+ #28 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Workqueue: usb_hub_wq hub_event > Call Trace: > <IRQ> > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0xca/0x13e lib/dump_stack.c:113 > print_address_description+0x6a/0x32c mm/kasan/report.c:351 > __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482 > kasan_report+0xe/0x12 mm/kasan/common.c:612 > rsi_rx_done_handler+0x3ba/0x490 drivers/net/wireless/rsi/rsi_91x_usb.c:267 > __usb_hcd_giveback_urb+0x1f2/0x470 drivers/usb/core/hcd.c:1657 > usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1722 > dummy_timer+0x120f/0x2fa2 drivers/usb/gadget/udc/dummy_hcd.c:1965 > call_timer_fn+0x179/0x650 kernel/time/timer.c:1322 > expire_timers kernel/time/timer.c:1366 [inline] > __run_timers kernel/time/timer.c:1685 [inline] > __run_timers kernel/time/timer.c:1653 [inline] > run_timer_softirq+0x5cc/0x14b0 kernel/time/timer.c:1698 > __do_softirq+0x221/0x912 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:537 [inline] > smp_apic_timer_interrupt+0x12f/0x500 arch/x86/kernel/apic/apic.c:1095 > apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 > </IRQ> > RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline] > RIP: 0010:console_unlock+0xa2a/0xc40 kernel/printk/printk.c:2471 > Code: 00 89 ee 48 c7 c7 20 89 d3 86 e8 61 ad 03 00 65 ff 0d 72 b5 d9 7e e9 > db f9 ff ff e8 80 a0 15 00 e8 2b ca 1a 00 ff 74 24 30 9d <e9> 18 fe ff ff > e8 6c a0 15 00 48 8d 7d 08 48 89 f8 48 c1 e8 03 42 > RSP: 0018:ffff8881d5077200 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13 > RAX: 0000000000000007 RBX: 0000000000000200 RCX: 0000000000000006 > RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881d5068844 > RBP: 0000000000000000 R08: ffff8881d5068000 R09: fffffbfff11ad791 > R10: fffffbfff11ad790 R11: ffffffff88d6bc87 R12: 000000000000004d > R13: dffffc0000000000 R14: ffffffff829090d0 R15: ffffffff87077430 > vprintk_emit+0x171/0x3e0 kernel/printk/printk.c:1986 > vprintk_func+0x75/0x113 kernel/printk/printk_safe.c:386 > printk+0xba/0xed kernel/printk/printk.c:2046 > really_probe.cold+0x69/0x1f6 drivers/base/dd.c:628 > driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 > __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 > bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454 > __device_attach+0x217/0x360 drivers/base/dd.c:894 > bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 > device_add+0xae6/0x16f0 drivers/base/core.c:2165 > usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023 > generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 > usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266 > really_probe+0x281/0x6d0 drivers/base/dd.c:548 > driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 > __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 > bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454 > __device_attach+0x217/0x360 drivers/base/dd.c:894 > bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 > device_add+0xae6/0x16f0 drivers/base/core.c:2165 > usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536 > hub_port_connect drivers/usb/core/hub.c:5098 [inline] > hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] > port_event drivers/usb/core/hub.c:5359 [inline] > hub_event+0x1b5c/0x3640 drivers/usb/core/hub.c:5441 > process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 > worker_thread+0x96/0xe20 kernel/workqueue.c:2415 > kthread+0x318/0x420 kernel/kthread.c:255 > ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 > > Allocated by task 102: > save_stack+0x1b/0x80 mm/kasan/common.c:69 > set_track mm/kasan/common.c:77 [inline] > __kasan_kmalloc mm/kasan/common.c:487 [inline] > __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:460 > kmalloc include/linux/slab.h:552 [inline] > kzalloc include/linux/slab.h:748 [inline] > rsi_init_usb_interface drivers/net/wireless/rsi/rsi_91x_usb.c:599 [inline] > rsi_probe+0x11a/0x15a0 drivers/net/wireless/rsi/rsi_91x_usb.c:780 > usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 > really_probe+0x281/0x6d0 drivers/base/dd.c:548 > driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 > __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 > bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454 > __device_attach+0x217/0x360 drivers/base/dd.c:894 > bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 > device_add+0xae6/0x16f0 drivers/base/core.c:2165 > usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023 > generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 > usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266 > really_probe+0x281/0x6d0 drivers/base/dd.c:548 > driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 > __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 > bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454 > __device_attach+0x217/0x360 drivers/base/dd.c:894 > bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 > device_add+0xae6/0x16f0 drivers/base/core.c:2165 > usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536 > hub_port_connect drivers/usb/core/hub.c:5098 [inline] > hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] > port_event drivers/usb/core/hub.c:5359 [inline] > hub_event+0x1b5c/0x3640 drivers/usb/core/hub.c:5441 > process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 > worker_thread+0x96/0xe20 kernel/workqueue.c:2415 > kthread+0x318/0x420 kernel/kthread.c:255 > ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 > > Freed by task 102: > save_stack+0x1b/0x80 mm/kasan/common.c:69 > set_track mm/kasan/common.c:77 [inline] > __kasan_slab_free+0x130/0x180 mm/kasan/common.c:449 > slab_free_hook mm/slub.c:1423 [inline] > slab_free_freelist_hook mm/slub.c:1474 [inline] > slab_free mm/slub.c:3016 [inline] > kfree+0xe4/0x2f0 mm/slub.c:3957 > rsi_91x_deinit+0x270/0x2f0 drivers/net/wireless/rsi/rsi_91x_main.c:407 > rsi_probe+0xcec/0x15a0 drivers/net/wireless/rsi/rsi_91x_usb.c:834 > usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 > really_probe+0x281/0x6d0 drivers/base/dd.c:548 > driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 > __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 > bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454 > __device_attach+0x217/0x360 drivers/base/dd.c:894 > bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 > device_add+0xae6/0x16f0 drivers/base/core.c:2165 > usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023 > generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 > usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266 > really_probe+0x281/0x6d0 drivers/base/dd.c:548 > driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 > __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 > bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454 > __device_attach+0x217/0x360 drivers/base/dd.c:894 > bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 > device_add+0xae6/0x16f0 drivers/base/core.c:2165 > usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536 > hub_port_connect drivers/usb/core/hub.c:5098 [inline] > hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] > port_event drivers/usb/core/hub.c:5359 [inline] > hub_event+0x1b5c/0x3640 drivers/usb/core/hub.c:5441 > process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 > worker_thread+0x96/0xe20 kernel/workqueue.c:2415 > 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 ffff8881cebc0f00 > which belongs to the cache kmalloc-512 of size 512 > The buggy address is located 232 bytes inside of > 512-byte region [ffff8881cebc0f00, ffff8881cebc1100) > The buggy address belongs to the page: > page:ffffea00073af000 refcount:1 mapcount:0 mapping:ffff8881da002500 > index:0x0 compound_mapcount: 0 > flags: 0x200000000010200(slab|head) > raw: 0200000000010200 0000000000000000 0000000b00000001 ffff8881da002500 > raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000 > page dumped because: kasan: bad access detected > > Memory state around the buggy address: > ffff8881cebc0e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8881cebc0f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > > ffff8881cebc0f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ^ > ffff8881cebc1000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff8881cebc1080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ================================================================== > > > --- > 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. Most likely the same issue as: #syz dup: WARNING: ODEBUG bug in rsi_probe https://syzkaller.appspot.com/bug?extid=1d1597a5aa3679c65b9f
