memory leak in hub_event

From: syzbot
Date: Fri Nov 20 2020 - 10:17:21 EST

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Hello,

syzbot found the following issue on:

HEAD commit: 4d02da97 Merge tag 'net-5.10-rc5' of git://git.kernel.org/..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13a7d2b6500000
kernel config: https://syzkaller.appspot.com/x/.config?x=c5353ac514ca5a43
dashboard link: https://syzkaller.appspot.com/bug?extid=44e64397bd81d5e84cba
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14925089500000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16810051500000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+44e64397bd81d5e84cba@xxxxxxxxxxxxxxxxxxxxxxxxx

BUG: memory leak
unreferenced object 0xffff88810d5ff800 (size 2048):
comm "kworker/1:0", pid 17, jiffies 4294949188 (age 14.280s)
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:
[<00000000f0428224>] kmalloc include/linux/slab.h:552 [inline]
[<00000000f0428224>] kzalloc include/linux/slab.h:664 [inline]
[<00000000f0428224>] usb_alloc_dev+0x32/0x450 drivers/usb/core/usb.c:582
[<000000001802b3dd>] hub_port_connect drivers/usb/core/hub.c:5128 [inline]
[<000000001802b3dd>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<000000001802b3dd>] port_event drivers/usb/core/hub.c:5508 [inline]
[<000000001802b3dd>] hub_event+0x118d/0x20d0 drivers/usb/core/hub.c:5590
[<0000000092d3650d>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
[<00000000d4629ab0>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
[<000000003c358b45>] kthread+0x178/0x1b0 kernel/kthread.c:292
[<000000003689dbb0>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

BUG: memory leak
unreferenced object 0xffff888112544c40 (size 32):
comm "kworker/1:0", pid 17, jiffies 4294949188 (age 14.280s)
hex dump (first 32 bytes):
31 2d 31 00 00 00 00 00 00 00 00 00 00 00 00 00 1-1.............
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000d0f4aa93>] kvasprintf+0x6c/0xf0 lib/kasprintf.c:25
[<000000005866b3ad>] kvasprintf_const+0x58/0x110 lib/kasprintf.c:49
[<00000000b590b008>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:289
[<00000000d251a578>] dev_set_name+0x63/0x90 drivers/base/core.c:2722
[<0000000075b37c03>] usb_alloc_dev+0x1ee/0x450 drivers/usb/core/usb.c:650
[<000000001802b3dd>] hub_port_connect drivers/usb/core/hub.c:5128 [inline]
[<000000001802b3dd>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<000000001802b3dd>] port_event drivers/usb/core/hub.c:5508 [inline]
[<000000001802b3dd>] hub_event+0x118d/0x20d0 drivers/usb/core/hub.c:5590
[<0000000092d3650d>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
[<00000000d4629ab0>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
[<000000003c358b45>] kthread+0x178/0x1b0 kernel/kthread.c:292
[<000000003689dbb0>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

BUG: memory leak
unreferenced object 0xffff888112544ce0 (size 32):
comm "kworker/1:0", pid 17, jiffies 4294949231 (age 13.850s)
hex dump (first 32 bytes):
00 4d 54 12 81 88 ff ff 00 00 00 00 00 00 00 00 .MT.............
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<000000005516ca37>] kmalloc include/linux/slab.h:557 [inline]
[<000000005516ca37>] kzalloc include/linux/slab.h:664 [inline]
[<000000005516ca37>] usb_get_configuration+0xce/0x1dd0 drivers/usb/core/config.c:887
[<000000009ab33a39>] usb_enumerate_device drivers/usb/core/hub.c:2387 [inline]
[<000000009ab33a39>] usb_new_device+0x1a9/0x2e0 drivers/usb/core/hub.c:2523
[<0000000069b10350>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
[<0000000069b10350>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<0000000069b10350>] port_event drivers/usb/core/hub.c:5508 [inline]
[<0000000069b10350>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590
[<0000000092d3650d>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
[<00000000d4629ab0>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
[<000000003c358b45>] kthread+0x178/0x1b0 kernel/kthread.c:292
[<000000003689dbb0>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

BUG: memory leak
unreferenced object 0xffff888112544bc0 (size 32):
comm "kworker/1:0", pid 17, jiffies 4294949247 (age 13.690s)
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:
[<00000000b344f779>] kmalloc include/linux/slab.h:557 [inline]
[<00000000b344f779>] usb_cache_string+0x8a/0xf0 drivers/usb/core/message.c:1025
[<0000000074577e65>] usb_enumerate_device drivers/usb/core/hub.c:2397 [inline]
[<0000000074577e65>] usb_new_device+0x98/0x2e0 drivers/usb/core/hub.c:2523
[<0000000069b10350>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
[<0000000069b10350>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<0000000069b10350>] port_event drivers/usb/core/hub.c:5508 [inline]
[<0000000069b10350>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590
[<0000000092d3650d>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
[<00000000d4629ab0>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
[<000000003c358b45>] kthread+0x178/0x1b0 kernel/kthread.c:292
[<000000003689dbb0>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

BUG: memory leak
unreferenced object 0xffff888112544cc0 (size 32):
comm "kworker/1:0", pid 17, jiffies 4294949251 (age 13.650s)
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:
[<00000000b344f779>] kmalloc include/linux/slab.h:557 [inline]
[<00000000b344f779>] usb_cache_string+0x8a/0xf0 drivers/usb/core/message.c:1025
[<000000003d5bd90b>] usb_enumerate_device drivers/usb/core/hub.c:2398 [inline]
[<000000003d5bd90b>] usb_new_device+0xae/0x2e0 drivers/usb/core/hub.c:2523
[<0000000069b10350>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
[<0000000069b10350>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<0000000069b10350>] port_event drivers/usb/core/hub.c:5508 [inline]
[<0000000069b10350>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590
[<0000000092d3650d>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
[<00000000d4629ab0>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
[<000000003c358b45>] kthread+0x178/0x1b0 kernel/kthread.c:292
[<000000003689dbb0>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

BUG: memory leak
unreferenced object 0xffff888112544d40 (size 32):
comm "kworker/1:0", pid 17, jiffies 4294949255 (age 13.610s)
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:
[<00000000b344f779>] kmalloc include/linux/slab.h:557 [inline]
[<00000000b344f779>] usb_cache_string+0x8a/0xf0 drivers/usb/core/message.c:1025
[<000000007392d5f6>] usb_enumerate_device drivers/usb/core/hub.c:2400 [inline]
[<000000007392d5f6>] usb_new_device+0xc4/0x2e0 drivers/usb/core/hub.c:2523
[<0000000069b10350>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
[<0000000069b10350>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<0000000069b10350>] port_event drivers/usb/core/hub.c:5508 [inline]
[<0000000069b10350>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590
[<0000000092d3650d>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
[<00000000d4629ab0>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
[<000000003c358b45>] kthread+0x178/0x1b0 kernel/kthread.c:292
[<000000003689dbb0>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory

---
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Next message: David Howells: "[RFC PATCH 62/76] afs: Use ITER_XARRAY for writing"
Previous message: David Howells: "[RFC PATCH 61/76] afs: Set up the iov_iter before calling afs_extract_data()"
Next in thread: Alan Stern: "Re: memory leak in hub_event"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]