linux-kernel - [syzbot] memory leak in hub

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Message-ID: <000000000000694b0805bd8bd16c@google.com>
Date:   Sun, 14 Mar 2021 21:38:14 -0700
From:   syzbot <syzbot+636c58f40a86b4a879e7@...kaller.appspotmail.com>
To:     a.darwish@...utronix.de, balbi@...nel.org, bigeasy@...utronix.de,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, stern@...land.harvard.edu,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de
Subject: [syzbot] memory leak in hub_event (2)

Hello,

syzbot found the following issue on:

HEAD commit:    05a59d79 Merge git://git.kernel.org:/pub/scm/linux/kernel/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=164e6ba2d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=796675cee501159f
dashboard link: https://syzkaller.appspot.com/bug?extid=636c58f40a86b4a879e7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=111849ecd00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16037376d00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+636c58f40a86b4a879e7@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff888109985800 (size 2048):
  comm "kworker/1:1", pid 35, jiffies 4294966369 (age 27.230s)
  hex dump (first 32 bytes):
    ff ff ff ff 31 00 00 00 00 00 00 00 00 00 00 00  ....1...........
    00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00  ................
  backtrace:
    [<000000004dfe56d1>] kmalloc include/linux/slab.h:554 [inline]
    [<000000004dfe56d1>] kzalloc include/linux/slab.h:684 [inline]
    [<000000004dfe56d1>] usb_alloc_dev+0x32/0x450 drivers/usb/core/usb.c:582
    [<00000000d2920859>] hub_port_connect drivers/usb/core/hub.c:5129 [inline]
    [<00000000d2920859>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
    [<00000000d2920859>] port_event drivers/usb/core/hub.c:5509 [inline]
    [<00000000d2920859>] hub_event+0x1171/0x20c0 drivers/usb/core/hub.c:5591
    [<0000000099d99129>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275
    [<00000000a83d9aee>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421
    [<00000000aaaf0fda>] kthread+0x178/0x1b0 kernel/kthread.c:292
    [<00000000d2888c70>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff88810cec9900 (size 32):
  comm "kworker/1:1", pid 35, jiffies 4294966421 (age 26.710s)
  hex dump (first 32 bytes):
    00 65 d0 10 81 88 ff ff 00 00 00 00 00 00 00 00  .e..............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000008a69447c>] kmalloc include/linux/slab.h:559 [inline]
    [<000000008a69447c>] kzalloc include/linux/slab.h:684 [inline]
    [<000000008a69447c>] usb_get_configuration+0xce/0x1dd0 drivers/usb/core/config.c:887
    [<00000000a636fc1f>] usb_enumerate_device drivers/usb/core/hub.c:2388 [inline]
    [<00000000a636fc1f>] usb_new_device+0x1a9/0x2e0 drivers/usb/core/hub.c:2524
    [<0000000024685ce9>] hub_port_connect drivers/usb/core/hub.c:5223 [inline]
    [<0000000024685ce9>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
    [<0000000024685ce9>] port_event drivers/usb/core/hub.c:5509 [inline]
    [<0000000024685ce9>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591
    [<0000000099d99129>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275
    [<00000000a83d9aee>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421
    [<00000000aaaf0fda>] kthread+0x178/0x1b0 kernel/kthread.c:292
    [<00000000d2888c70>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff88810b1b75c0 (size 32):
  comm "kworker/1:1", pid 35, jiffies 4294966448 (age 26.440s)
  hex dump (first 32 bytes):
    73 79 7a 00 00 00 00 00 00 00 00 00 00 00 00 00  syz.............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000007889c4a2>] kmalloc include/linux/slab.h:559 [inline]
    [<000000007889c4a2>] usb_cache_string+0x8a/0xf0 drivers/usb/core/message.c:1025
    [<00000000c372c0b9>] usb_enumerate_device drivers/usb/core/hub.c:2398 [inline]
    [<00000000c372c0b9>] usb_new_device+0x98/0x2e0 drivers/usb/core/hub.c:2524
    [<0000000024685ce9>] hub_port_connect drivers/usb/core/hub.c:5223 [inline]
    [<0000000024685ce9>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
    [<0000000024685ce9>] port_event drivers/usb/core/hub.c:5509 [inline]
    [<0000000024685ce9>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591
    [<0000000099d99129>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275
    [<00000000a83d9aee>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421
    [<00000000aaaf0fda>] kthread+0x178/0x1b0 kernel/kthread.c:292
    [<00000000d2888c70>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff88810cec9800 (size 32):
  comm "kworker/1:1", pid 35, jiffies 4294966452 (age 26.400s)
  hex dump (first 32 bytes):
    73 79 7a 00 00 00 00 00 00 00 00 00 00 00 00 00  syz.............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000007889c4a2>] kmalloc include/linux/slab.h:559 [inline]
    [<000000007889c4a2>] usb_cache_string+0x8a/0xf0 drivers/usb/core/message.c:1025
    [<00000000b8074d2b>] usb_enumerate_device drivers/usb/core/hub.c:2399 [inline]
    [<00000000b8074d2b>] usb_new_device+0xae/0x2e0 drivers/usb/core/hub.c:2524
    [<0000000024685ce9>] hub_port_connect drivers/usb/core/hub.c:5223 [inline]
    [<0000000024685ce9>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
    [<0000000024685ce9>] port_event drivers/usb/core/hub.c:5509 [inline]
    [<0000000024685ce9>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591
    [<0000000099d99129>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275
    [<00000000a83d9aee>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421
    [<00000000aaaf0fda>] kthread+0x178/0x1b0 kernel/kthread.c:292
    [<00000000d2888c70>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff88810cec9140 (size 32):
  comm "kworker/1:1", pid 35, jiffies 4294966456 (age 26.360s)
  hex dump (first 32 bytes):
    73 79 7a 00 00 00 00 00 00 00 00 00 00 00 00 00  syz.............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000007889c4a2>] kmalloc include/linux/slab.h:559 [inline]
    [<000000007889c4a2>] usb_cache_string+0x8a/0xf0 drivers/usb/core/message.c:1025
    [<000000002dd0377f>] usb_enumerate_device drivers/usb/core/hub.c:2401 [inline]
    [<000000002dd0377f>] usb_new_device+0xc4/0x2e0 drivers/usb/core/hub.c:2524
    [<0000000024685ce9>] hub_port_connect drivers/usb/core/hub.c:5223 [inline]
    [<0000000024685ce9>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
    [<0000000024685ce9>] port_event drivers/usb/core/hub.c:5509 [inline]
    [<0000000024685ce9>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591
    [<0000000099d99129>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275
    [<00000000a83d9aee>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421
    [<00000000aaaf0fda>] kthread+0x178/0x1b0 kernel/kthread.c:292
    [<00000000d2888c70>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff8881101a8800 (size 256):
  comm "kworker/1:1", pid 35, jiffies 4294966459 (age 26.330s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 08 88 1a 10 81 88 ff ff  ................
    08 88 1a 10 81 88 ff ff 30 23 5e 82 ff ff ff ff  ........0#^.....
  backtrace:
    [<000000002a4ba0cb>] kmalloc include/linux/slab.h:554 [inline]
    [<000000002a4ba0cb>] kzalloc include/linux/slab.h:684 [inline]
    [<000000002a4ba0cb>] device_private_init drivers/base/core.c:3084 [inline]
    [<000000002a4ba0cb>] device_add+0x811/0xc40 drivers/base/core.c:3134
    [<00000000440fa047>] usb_new_device.cold+0x16a/0x582 drivers/usb/core/hub.c:2555
    [<0000000024685ce9>] hub_port_connect drivers/usb/core/hub.c:5223 [inline]
    [<0000000024685ce9>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
    [<0000000024685ce9>] port_event drivers/usb/core/hub.c:5509 [inline]
    [<0000000024685ce9>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591
    [<0000000099d99129>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275
    [<00000000a83d9aee>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421
    [<00000000aaaf0fda>] kthread+0x178/0x1b0 kernel/kthread.c:292
    [<00000000d2888c70>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294



---
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