netdev - [syzbot] memory leak in smsc75xx

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Date:   Mon, 24 May 2021 02:12:26 -0700
From:   syzbot <syzbot+b558506ba8165425fee2@...kaller.appspotmail.com>
To:     davem@...emloft.net, kuba@...nel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, netdev@...r.kernel.org,
        steve.glendinning@...well.net, syzkaller-bugs@...glegroups.com
Subject: [syzbot] memory leak in smsc75xx_bind

Hello,

syzbot found the following issue on:

HEAD commit:    6ebb6814 Merge tag 'perf-urgent-2021-05-23' of git://git.k..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1334afc7d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ae7b129a135ab06b
dashboard link: https://syzkaller.appspot.com/bug?extid=b558506ba8165425fee2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11ca4a35d00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b558506ba8165425fee2@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff888118ddde40 (size 192):
  comm "kworker/1:2", pid 1931, jiffies 4295045866 (age 18.790s)
  hex dump (first 32 bytes):
    40 39 e7 18 81 88 ff ff 00 00 00 00 00 00 00 00  @9..............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff84245b62>] kmalloc include/linux/slab.h:556 [inline]
    [<ffffffff84245b62>] kzalloc include/linux/slab.h:686 [inline]
    [<ffffffff84245b62>] smsc75xx_bind+0x7a/0x334 drivers/net/usb/smsc75xx.c:1460
    [<ffffffff82b5b2e6>] usbnet_probe+0x3b6/0xc30 drivers/net/usb/usbnet.c:1728
    [<ffffffff82be65e7>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<ffffffff82624159>] really_probe+0x159/0x500 drivers/base/dd.c:576
    [<ffffffff8262458b>] driver_probe_device+0x8b/0x100 drivers/base/dd.c:763
    [<ffffffff82624cb6>] __device_attach_driver+0xf6/0x120 drivers/base/dd.c:870
    [<ffffffff82621047>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<ffffffff82624832>] __device_attach+0x122/0x260 drivers/base/dd.c:938
    [<ffffffff82622ce6>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<ffffffff8261f105>] device_add+0x5d5/0xd70 drivers/base/core.c:3320
    [<ffffffff82be3b89>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164
    [<ffffffff82bf3f0c>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<ffffffff82be5d4c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<ffffffff82624159>] really_probe+0x159/0x500 drivers/base/dd.c:576
    [<ffffffff8262458b>] driver_probe_device+0x8b/0x100 drivers/base/dd.c:763
    [<ffffffff82624cb6>] __device_attach_driver+0xf6/0x120 drivers/base/dd.c:870

BUG: memory leak
unreferenced object 0xffff888113abcf00 (size 192):
  comm "kworker/1:1", pid 8586, jiffies 4295046670 (age 10.750s)
  hex dump (first 32 bytes):
    40 69 0c 13 81 88 ff ff 00 00 00 00 00 00 00 00  @i..............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff84245b62>] kmalloc include/linux/slab.h:556 [inline]
    [<ffffffff84245b62>] kzalloc include/linux/slab.h:686 [inline]
    [<ffffffff84245b62>] smsc75xx_bind+0x7a/0x334 drivers/net/usb/smsc75xx.c:1460
    [<ffffffff82b5b2e6>] usbnet_probe+0x3b6/0xc30 drivers/net/usb/usbnet.c:1728
    [<ffffffff82be65e7>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<ffffffff82624159>] really_probe+0x159/0x500 drivers/base/dd.c:576
    [<ffffffff8262458b>] driver_probe_device+0x8b/0x100 drivers/base/dd.c:763
    [<ffffffff82624cb6>] __device_attach_driver+0xf6/0x120 drivers/base/dd.c:870
    [<ffffffff82621047>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<ffffffff82624832>] __device_attach+0x122/0x260 drivers/base/dd.c:938
    [<ffffffff82622ce6>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<ffffffff8261f105>] device_add+0x5d5/0xd70 drivers/base/core.c:3320
    [<ffffffff82be3b89>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164
    [<ffffffff82bf3f0c>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<ffffffff82be5d4c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<ffffffff82624159>] really_probe+0x159/0x500 drivers/base/dd.c:576
    [<ffffffff8262458b>] driver_probe_device+0x8b/0x100 drivers/base/dd.c:763
    [<ffffffff82624cb6>] __device_attach_driver+0xf6/0x120 drivers/base/dd.c:870

BUG: memory leak
unreferenced object 0xffff888118ee1900 (size 192):
  comm "kworker/0:0", pid 8419, jiffies 4295046919 (age 8.260s)
  hex dump (first 32 bytes):
    40 49 0a 19 81 88 ff ff 00 00 00 00 00 00 00 00  @I..............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff84245b62>] kmalloc include/linux/slab.h:556 [inline]
    [<ffffffff84245b62>] kzalloc include/linux/slab.h:686 [inline]
    [<ffffffff84245b62>] smsc75xx_bind+0x7a/0x334 drivers/net/usb/smsc75xx.c:1460
    [<ffffffff82b5b2e6>] usbnet_probe+0x3b6/0xc30 drivers/net/usb/usbnet.c:1728
    [<ffffffff82be65e7>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<ffffffff82624159>] really_probe+0x159/0x500 drivers/base/dd.c:576
    [<ffffffff8262458b>] driver_probe_device+0x8b/0x100 drivers/base/dd.c:763
    [<ffffffff82624cb6>] __device_attach_driver+0xf6/0x120 drivers/base/dd.c:870
    [<ffffffff82621047>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<ffffffff82624832>] __device_attach+0x122/0x260 drivers/base/dd.c:938
    [<ffffffff82622ce6>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<ffffffff8261f105>] device_add+0x5d5/0xd70 drivers/base/core.c:3320
    [<ffffffff82be3b89>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164
    [<ffffffff82bf3f0c>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<ffffffff82be5d4c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<ffffffff82624159>] really_probe+0x159/0x500 drivers/base/dd.c:576
    [<ffffffff8262458b>] driver_probe_device+0x8b/0x100 drivers/base/dd.c:763
    [<ffffffff82624cb6>] __device_attach_driver+0xf6/0x120 drivers/base/dd.c:870



---
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