Hello, syzbot found the following issue on: HEAD commit: 0477e928 Linux 5.10-rc7 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16dacc13500000 kernel config: https://syzkaller.appspot.com/x/.config?x=4305fa9ea70c7a9f dashboard link: https://syzkaller.appspot.com/bug?extid=91adee8d9ebb9193d22d compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14e1d00f500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=153ac2cb500000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+91adee8d9ebb9193d22d@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: memory leak unreferenced object 0xffff88810f4cc200 (size 128): comm "kworker/1:1", pid 34, jiffies 4294942277 (age 8.590s) hex dump (first 32 bytes): 40 09 42 12 81 88 ff ff 00 00 00 00 00 00 00 00 @.B............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000a24b3bdd>] kmalloc include/linux/slab.h:552 [inline] [<00000000a24b3bdd>] kzalloc include/linux/slab.h:664 [inline] [<00000000a24b3bdd>] pcan_usb_fd_init+0x156/0x210 drivers/net/can/usb/peak_usb/pcan_usb_fd.c:865 [<000000007ba29c7f>] peak_usb_create_dev drivers/net/can/usb/peak_usb/pcan_usb_core.c:850 [inline] [<000000007ba29c7f>] peak_usb_probe+0x389/0x490 drivers/net/can/usb/peak_usb/pcan_usb_core.c:948 [<00000000ea93b2ea>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<000000001ee8e05e>] really_probe+0x159/0x480 drivers/base/dd.c:554 [<0000000010c7fe39>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738 [<0000000020e41d8d>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844 [<000000000272c5fa>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431 [<00000000d3b1aa42>] __device_attach+0x122/0x250 drivers/base/dd.c:912 [<00000000a0b053c3>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491 [<00000000dfb5e550>] device_add+0x5ac/0xc30 drivers/base/core.c:2936 [<00000000d6321aa6>] usb_set_configuration+0x9de/0xb90 drivers/usb/core/message.c:2159 [<000000003d1efb2f>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<000000000a7312a8>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<000000001ee8e05e>] really_probe+0x159/0x480 drivers/base/dd.c:554 [<0000000010c7fe39>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738 [<0000000020e41d8d>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844 BUG: memory leak unreferenced object 0xffff88810f7a4800 (size 512): comm "kworker/1:1", pid 34, jiffies 4294942277 (age 8.590s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 ff ff ff ff ff ff ff ff ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000009ddd23ca>] kmalloc include/linux/slab.h:552 [inline] [<000000009ddd23ca>] kzalloc include/linux/slab.h:664 [inline] [<000000009ddd23ca>] pcan_usb_fd_init+0x181/0x210 drivers/net/can/usb/peak_usb/pcan_usb_fd.c:870 [<000000007ba29c7f>] peak_usb_create_dev drivers/net/can/usb/peak_usb/pcan_usb_core.c:850 [inline] [<000000007ba29c7f>] peak_usb_probe+0x389/0x490 drivers/net/can/usb/peak_usb/pcan_usb_core.c:948 [<00000000ea93b2ea>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<000000001ee8e05e>] really_probe+0x159/0x480 drivers/base/dd.c:554 [<0000000010c7fe39>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738 [<0000000020e41d8d>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844 [<000000000272c5fa>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431 [<00000000d3b1aa42>] __device_attach+0x122/0x250 drivers/base/dd.c:912 [<00000000a0b053c3>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491 [<00000000dfb5e550>] device_add+0x5ac/0xc30 drivers/base/core.c:2936 [<00000000d6321aa6>] usb_set_configuration+0x9de/0xb90 drivers/usb/core/message.c:2159 [<000000003d1efb2f>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<000000000a7312a8>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<000000001ee8e05e>] really_probe+0x159/0x480 drivers/base/dd.c:554 [<0000000010c7fe39>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738 [<0000000020e41d8d>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844 --- 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
