On Mon, Apr 29, 2019 at 2:06 PM syzbot <syzbot+15e91d49c4c757c3d363@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: 43151d6c usb-fuzzer: main usb gadget fuzzer driver > git tree: https://github.com/google/kasan/tree/usb-fuzzer > console output: https://syzkaller.appspot.com/x/log.txt?x=106c9498a00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=4183eeef650d1234 > dashboard link: https://syzkaller.appspot.com/bug?extid=15e91d49c4c757c3d363 > 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+15e91d49c4c757c3d363@xxxxxxxxxxxxxxxxxxxxxxxxx > > usb 5-1: selecting invalid altsetting 5 > au0828: Failure setting usb interface0 to as5 > au0828: au0828_usb_probe() au0828_analog_register failed to register on V4L2 > BUG: unable to handle kernel paging request at fffffffc4508a958 > #PF error: [normal kernel read fault] > PGD 1167e067 P4D 1167e067 PUD 0 > Oops: 0000 [#1] SMP KASAN PTI > CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.1.0-rc3-319004-g43151d6 #6 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Workqueue: usb_hub_wq hub_event > RIP: 0010:decode_cpu kernel/locking/osq_lock.c:34 [inline] > RIP: 0010:osq_lock+0xfd/0x5a0 kernel/locking/osq_lock.c:111 > Code: 48 63 e8 48 b8 00 00 00 00 00 fc ff df 48 8d 3c ed 60 b0 39 91 48 89 > f9 48 c1 e9 03 80 3c 01 00 0f 85 2c 04 00 00 48 8d 53 08 <4c> 03 2c ed 60 > b0 39 91 48 b8 00 00 00 00 00 fc ff df 48 89 d6 48 > RSP: 0018:ffff8880a84f70e8 EFLAGS: 00010246 > RAX: dffffc0000000000 RBX: ffff8880ad12dfc0 RCX: 1fffffff88a1152b > RDX: ffff8880ad12dfc8 RSI: 0000000000000004 RDI: fffffffc4508a958 > RBP: ffffffff9679df1f R08: 0000000000000000 R09: ffffed10122cb31e > R10: ffffed10122cb31d R11: ffff8880916598eb R12: ffff8880ad12dfd0 > R13: 000000000002dfc0 R14: ffff8880a84db100 R15: ffff8880916598e8 > FS: 0000000000000000(0000) GS:ffff8880ad100000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: fffffffc4508a958 CR3: 00000000824b6000 CR4: 00000000001406e0 > Call Trace: > mutex_optimistic_spin kernel/locking/mutex.c:630 [inline] > __mutex_lock_common kernel/locking/mutex.c:928 [inline] > __mutex_lock+0x27d/0x12b0 kernel/locking/mutex.c:1072 > au0828_usb_disconnect+0xa3/0x130 drivers/media/usb/au0828/au0828-core.c:194 > au0828_usb_probe.cold+0x121/0x7d8 > drivers/media/usb/au0828/au0828-core.c:661 > usb_probe_interface+0x31d/0x820 drivers/usb/core/driver.c:361 > really_probe+0x2da/0xb10 drivers/base/dd.c:509 > driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 > __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 > bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 > __device_attach+0x223/0x3a0 drivers/base/dd.c:844 > bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 > device_add+0xad2/0x16e0 drivers/base/core.c:2106 > usb_set_configuration+0xdf7/0x1740 drivers/usb/core/message.c:2023 > generic_probe+0xa2/0xda drivers/usb/core/generic.c:210 > usb_probe_device+0xc0/0x150 drivers/usb/core/driver.c:266 > really_probe+0x2da/0xb10 drivers/base/dd.c:509 > driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 > __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 > bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 > __device_attach+0x223/0x3a0 drivers/base/dd.c:844 > bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 > device_add+0xad2/0x16e0 drivers/base/core.c:2106 > usb_new_device.cold+0x537/0xccf drivers/usb/core/hub.c:2534 > hub_port_connect drivers/usb/core/hub.c:5089 [inline] > hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] > port_event drivers/usb/core/hub.c:5350 [inline] > hub_event+0x138e/0x3b00 drivers/usb/core/hub.c:5432 > process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 > worker_thread+0x9b/0xe20 kernel/workqueue.c:2415 > kthread+0x313/0x420 kernel/kthread.c:253 > ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 > Modules linked in: > CR2: fffffffc4508a958 > ---[ end trace e04421c5fdf22ecf ]--- > RIP: 0010:decode_cpu kernel/locking/osq_lock.c:34 [inline] > RIP: 0010:osq_lock+0xfd/0x5a0 kernel/locking/osq_lock.c:111 > Code: 48 63 e8 48 b8 00 00 00 00 00 fc ff df 48 8d 3c ed 60 b0 39 91 48 89 > f9 48 c1 e9 03 80 3c 01 00 0f 85 2c 04 00 00 48 8d 53 08 <4c> 03 2c ed 60 > b0 39 91 48 b8 00 00 00 00 00 fc ff df 48 89 d6 48 > RSP: 0018:ffff8880a84f70e8 EFLAGS: 00010246 > RAX: dffffc0000000000 RBX: ffff8880ad12dfc0 RCX: 1fffffff88a1152b > RDX: ffff8880ad12dfc8 RSI: 0000000000000004 RDI: fffffffc4508a958 > RBP: ffffffff9679df1f R08: 0000000000000000 R09: ffffed10122cb31e > R10: ffffed10122cb31d R11: ffff8880916598eb R12: ffff8880ad12dfd0 > R13: 000000000002dfc0 R14: ffff8880a84db100 R15: ffff8880916598e8 > FS: 0000000000000000(0000) GS:ffff8880ad100000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: fffffffc4508a958 CR3: 00000000824b6000 CR4: 00000000001406e0 > > > --- > 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: slab-out-of-bounds Read in au0828_rc_unregister (2)
