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X-Received: by 2002:a05:6e02:e45:: with SMTP id l5mr15361557ilk.294.1608540849804; Mon, 21 Dec 2020 00:54:09 -0800 (PST) Date: Mon, 21 Dec 2020 00:54:09 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f599c005b6f59913@google.com> Subject: memory leak in mcba_usb_probe From: syzbot To: a.darwish@linutronix.de, bigeasy@linutronix.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 467f8165 Merge tag 'close-range-cloexec-unshare-v5.11' of .. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15933e0f500000 kernel config: https://syzkaller.appspot.com/x/.config?x=37c889fb8b2761af dashboard link: https://syzkaller.appspot.com/bug?extid=57281c762a3922e14dfe compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14fe2b9b500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13bd2287500000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+57281c762a3922e14dfe@syzkaller.appspotmail.com BUG: memory leak unreferenced object 0xffff88811101c080 (size 64): comm "kworker/0:2", pid 56, jiffies 4294942309 (age 8.240s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000e42b7c1c>] kmalloc include/linux/slab.h:557 [inline] [<00000000e42b7c1c>] hcd_buffer_alloc+0x149/0x190 drivers/usb/core/buffer.c:134 [<0000000042899d1a>] usb_alloc_coherent+0x42/0x60 drivers/usb/core/usb.c:897 [<00000000abbb04b6>] mcba_usb_start drivers/net/can/usb/mcba_usb.c:644 [inline] [<00000000abbb04b6>] mcba_usb_probe+0x27b/0x430 drivers/net/can/usb/mcba_usb.c:846 [<00000000b5e48b67>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<00000000a0416f71>] really_probe+0x159/0x480 drivers/base/dd.c:561 [<00000000cce96f4d>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745 [<00000000b0116c0e>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851 [<00000000da4bf16e>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431 [<00000000e826f962>] __device_attach+0x122/0x250 drivers/base/dd.c:919 [<00000000fb35d32b>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491 [<0000000083f168a1>] device_add+0x5be/0xc30 drivers/base/core.c:3091 [<000000002b4245b1>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164 [<00000000fa502fa0>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<000000004e1ab3a9>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<00000000a0416f71>] really_probe+0x159/0x480 drivers/base/dd.c:561 [<00000000cce96f4d>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745 BUG: memory leak unreferenced object 0xffff88811101c0c0 (size 64): comm "kworker/0:2", pid 56, jiffies 4294942309 (age 8.240s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000e42b7c1c>] kmalloc include/linux/slab.h:557 [inline] [<00000000e42b7c1c>] hcd_buffer_alloc+0x149/0x190 drivers/usb/core/buffer.c:134 [<0000000042899d1a>] usb_alloc_coherent+0x42/0x60 drivers/usb/core/usb.c:897 [<00000000abbb04b6>] mcba_usb_start drivers/net/can/usb/mcba_usb.c:644 [inline] [<00000000abbb04b6>] mcba_usb_probe+0x27b/0x430 drivers/net/can/usb/mcba_usb.c:846 [<00000000b5e48b67>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<00000000a0416f71>] really_probe+0x159/0x480 drivers/base/dd.c:561 [<00000000cce96f4d>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745 [<00000000b0116c0e>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851 [<00000000da4bf16e>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431 [<00000000e826f962>] __device_attach+0x122/0x250 drivers/base/dd.c:919 [<00000000fb35d32b>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491 [<0000000083f168a1>] device_add+0x5be/0xc30 drivers/base/core.c:3091 [<000000002b4245b1>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164 [<00000000fa502fa0>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<000000004e1ab3a9>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<00000000a0416f71>] really_probe+0x159/0x480 drivers/base/dd.c:561 [<00000000cce96f4d>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745 BUG: memory leak unreferenced object 0xffff88811101c100 (size 64): comm "kworker/0:2", pid 56, jiffies 4294942309 (age 8.240s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000e42b7c1c>] kmalloc include/linux/slab.h:557 [inline] [<00000000e42b7c1c>] hcd_buffer_alloc+0x149/0x190 drivers/usb/core/buffer.c:134 [<0000000042899d1a>] usb_alloc_coherent+0x42/0x60 drivers/usb/core/usb.c:897 [<00000000abbb04b6>] mcba_usb_start drivers/net/can/usb/mcba_usb.c:644 [inline] [<00000000abbb04b6>] mcba_usb_probe+0x27b/0x430 drivers/net/can/usb/mcba_usb.c:846 [<00000000b5e48b67>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<00000000a0416f71>] really_probe+0x159/0x480 drivers/base/dd.c:561 [<00000000cce96f4d>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745 [<00000000b0116c0e>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851 [<00000000da4bf16e>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431 [<00000000e826f962>] __device_attach+0x122/0x250 drivers/base/dd.c:919 [<00000000fb35d32b>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491 [<0000000083f168a1>] device_add+0x5be/0xc30 drivers/base/core.c:3091 [<000000002b4245b1>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164 [<00000000fa502fa0>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<000000004e1ab3a9>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<00000000a0416f71>] really_probe+0x159/0x480 drivers/base/dd.c:561 [<00000000cce96f4d>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745 --- 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@googlegroups.com. 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