Hello, syzbot found the following issue on: HEAD commit: 407ab579 Merge tag 'for-linus' of git://git.kernel.org/pub.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1472cf3a500000 kernel config: https://syzkaller.appspot.com/x/.config?x=a3f13716fa0212fd dashboard link: https://syzkaller.appspot.com/bug?extid=7f09440acc069a0d38ac compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1496773a500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11f5d04e500000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7f09440acc069a0d38ac@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: memory leak unreferenced object 0xffff888109ceb880 (size 128): comm "kworker/0:4", pid 4908, jiffies 4294942256 (age 13.710s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 06 05 00 00 00 00 00 00 ................ 00 01 00 00 00 00 ad de 22 01 00 00 00 00 ad de ........"....... backtrace: [<0000000063129123>] kmalloc include/linux/slab.h:552 [inline] [<0000000063129123>] kzalloc include/linux/slab.h:664 [inline] [<0000000063129123>] dvb_create_media_graph+0x301/0x7d0 drivers/media/dvb-core/dvbdev.c:662 [<00000000446ffd59>] dvb_usb_adapter_frontend_init+0x180/0x1b0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:327 [<000000004de3ceb1>] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:84 [inline] [<000000004de3ceb1>] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] [<000000004de3ceb1>] dvb_usb_device_init.cold+0x4d0/0x6ae drivers/media/usb/dvb-usb/dvb-usb-init.c:287 [<0000000044208faf>] gp8psk_usb_probe+0x2a/0x50 drivers/media/usb/dvb-usb/gp8psk.c:304 [<000000001403cbb0>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<000000009ed11d03>] really_probe+0x159/0x480 drivers/base/dd.c:554 [<000000000cd27108>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738 [<000000005568f559>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844 [<00000000f9838db7>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431 [<000000006449b02e>] __device_attach+0x122/0x250 drivers/base/dd.c:912 [<000000007f8d4f6c>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491 [<0000000023ea078a>] device_add+0x5ac/0xc30 drivers/base/core.c:2936 [<0000000024710aa6>] usb_set_configuration+0x9de/0xb90 drivers/usb/core/message.c:2159 [<000000009af942e5>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<00000000a5638b3c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<000000009ed11d03>] really_probe+0x159/0x480 drivers/base/dd.c:554 BUG: memory leak unreferenced object 0xffff888110cbec80 (size 128): comm "kworker/1:2", pid 4591, jiffies 4294942850 (age 7.770s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 06 05 00 00 00 00 00 00 ................ 00 01 00 00 00 00 ad de 22 01 00 00 00 00 ad de ........"....... backtrace: [<0000000063129123>] kmalloc include/linux/slab.h:552 [inline] [<0000000063129123>] kzalloc include/linux/slab.h:664 [inline] [<0000000063129123>] dvb_create_media_graph+0x301/0x7d0 drivers/media/dvb-core/dvbdev.c:662 [<00000000446ffd59>] dvb_usb_adapter_frontend_init+0x180/0x1b0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:327 [<000000004de3ceb1>] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:84 [inline] [<000000004de3ceb1>] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] [<000000004de3ceb1>] dvb_usb_device_init.cold+0x4d0/0x6ae drivers/media/usb/dvb-usb/dvb-usb-init.c:287 [<0000000044208faf>] gp8psk_usb_probe+0x2a/0x50 drivers/media/usb/dvb-usb/gp8psk.c:304 [<000000001403cbb0>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<000000009ed11d03>] really_probe+0x159/0x480 drivers/base/dd.c:554 [<000000000cd27108>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738 [<000000005568f559>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844 [<00000000f9838db7>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431 [<000000006449b02e>] __device_attach+0x122/0x250 drivers/base/dd.c:912 [<000000007f8d4f6c>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491 [<0000000023ea078a>] device_add+0x5ac/0xc30 drivers/base/core.c:2936 [<0000000024710aa6>] usb_set_configuration+0x9de/0xb90 drivers/usb/core/message.c:2159 [<000000009af942e5>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<00000000a5638b3c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<000000009ed11d03>] really_probe+0x159/0x480 drivers/base/dd.c:554 --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
