On Thu, Sep 19, 2019 at 8:19 PM syzbot <syzbot+ffb8ab77a232a91eb24d@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: e0bd8d79 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=10c403c9600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=8847e5384a16f66a > dashboard link: https://syzkaller.appspot.com/bug?extid=ffb8ab77a232a91eb24d > 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+ffb8ab77a232a91eb24d@xxxxxxxxxxxxxxxxxxxxxxxxx > > kasan: CONFIG_KASAN_INLINE enabled > kasan: GPF could be caused by NULL-ptr deref or user memory access > general protection fault: 0000 [#1] SMP KASAN > CPU: 0 PID: 18871 Comm: syz-executor.4 Not tainted 5.3.0+ #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:dev_name include/linux/device.h:1342 [inline] > RIP: 0010:__dev_printk+0x3a/0x203 drivers/base/core.c:3335 > Code: 89 f5 53 e8 6f ab d1 fe 48 85 ed 0f 84 bc 01 00 00 e8 61 ab d1 fe 48 > 8d 7d 50 b8 ff ff 37 00 48 89 fa 48 c1 e0 2a 48 c1 ea 03 <80> 3c 02 00 74 > 05 e8 12 62 f8 fe 4c 8b 7d 50 4d 85 ff 75 27 e8 34 > RSP: 0018:ffff8881d5fe7cf8 EFLAGS: 00010206 > RAX: dffffc0000000000 RBX: ffffed103abfcfa6 RCX: ffffffff8388846d > RDX: 000000000000001e RSI: ffffffff826c929f RDI: 00000000000000f0 > RBP: 00000000000000a0 R08: ffff8881b2c7b000 R09: fffffbfff0e586ed > R10: ffff8881d5fe7e28 R11: ffffffff872c3767 R12: ffffffff85f2b0e0 > R13: ffff8881d5fe7d50 R14: ffff8881ca3eaa08 R15: ffffffff83888440 > FS: 0000555556264940(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000001b2e82d000 CR3: 00000001caefb000 CR4: 00000000001406f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > _dev_info+0xd7/0x109 drivers/base/core.c:3381 > close_rio.cold+0x1f/0x24 drivers/usb/misc/rio500.c:96 > __fput+0x2d7/0x840 fs/file_table.c:280 > task_work_run+0x13f/0x1c0 kernel/task_work.c:113 > tracehook_notify_resume include/linux/tracehook.h:188 [inline] > exit_to_usermode_loop+0x1d2/0x200 arch/x86/entry/common.c:163 > prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] > syscall_return_slowpath arch/x86/entry/common.c:274 [inline] > do_syscall_64+0x45f/0x580 arch/x86/entry/common.c:300 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x4135d1 > Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 > 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 > 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 > RSP: 002b:00007ffe720c0770 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 > RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00000000004135d1 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 > RBP: 0000000000000001 R08: ffffffff81160fc4 R09: 000000004679f032 > R10: 00007ffe720c0850 R11: 0000000000000293 R12: 000000000075c9a0 > R13: 000000000075c9a0 R14: 0000000000760ec0 R15: 000000000075bfd4 > Modules linked in: > ---[ end trace a70ef99560251cf4 ]--- > RIP: 0010:dev_name include/linux/device.h:1342 [inline] > RIP: 0010:__dev_printk+0x3a/0x203 drivers/base/core.c:3335 > Code: 89 f5 53 e8 6f ab d1 fe 48 85 ed 0f 84 bc 01 00 00 e8 61 ab d1 fe 48 > 8d 7d 50 b8 ff ff 37 00 48 89 fa 48 c1 e0 2a 48 c1 ea 03 <80> 3c 02 00 74 > 05 e8 12 62 f8 fe 4c 8b 7d 50 4d 85 ff 75 27 e8 34 > RSP: 0018:ffff8881d5fe7cf8 EFLAGS: 00010206 > RAX: dffffc0000000000 RBX: ffffed103abfcfa6 RCX: ffffffff8388846d > RDX: 000000000000001e RSI: ffffffff826c929f RDI: 00000000000000f0 > RBP: 00000000000000a0 R08: ffff8881b2c7b000 R09: fffffbfff0e586ed > R10: ffff8881d5fe7e28 R11: ffffffff872c3767 R12: ffffffff85f2b0e0 > R13: ffff8881d5fe7d50 R14: ffff8881ca3eaa08 R15: ffffffff83888440 > FS: 0000555556264940(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000001b2e82d000 CR3: 00000001caefb000 CR4: 00000000001406f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > 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 probably the same bug: https://syzkaller.appspot.com/bug?extid=745b0dff8028f9488eba #syz dup: KASAN: invalid-free in disconnect_rio (2)
