Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
memory leak in usb_set_configuration
BUG: memory leak
unreferenced object 0xffff888125a13400 (size 1024):
comm "kworker/0:3", pid 8164, jiffies 4294944436 (age 13.610s)
hex dump (first 32 bytes):
08 c7 84 25 81 88 ff ff 08 c7 84 25 81 88 ff ff ...%.......%....
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<0000000042c26fbc>] kmalloc include/linux/slab.h:552 [inline]
[<0000000042c26fbc>] kzalloc include/linux/slab.h:664 [inline]
[<0000000042c26fbc>] usb_set_configuration+0x18c/0xb90 drivers/usb/core/message.c:1987
[<00000000df7c22fc>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
[<00000000dbc03c2e>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
[<0000000061119d56>] really_probe+0x159/0x480 drivers/base/dd.c:554
[<000000009f962ea9>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
[<000000001459c72b>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
[<000000000532b098>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
[<00000000910da3ce>] __device_attach+0x122/0x250 drivers/base/dd.c:912
[<0000000072e90711>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
[<000000005cbbd88c>] device_add+0x5ac/0xc30 drivers/base/core.c:2936
[<00000000e7bc8059>] usb_new_device.cold+0x166/0x578 drivers/usb/core/hub.c:2554
[<00000000d9415aa4>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
[<00000000d9415aa4>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<00000000d9415aa4>] port_event drivers/usb/core/hub.c:5508 [inline]
[<00000000d9415aa4>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590
[<000000004f0d05ee>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
[<00000000a8771f1e>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
[<00000000b8ee2caf>] kthread+0x178/0x1b0 kernel/kthread.c:292
[<00000000e31b0818>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
BUG: memory leak
unreferenced object 0xffff88812592c340 (size 32):
comm "kworker/0:3", pid 8164, jiffies 4294944436 (age 13.610s)
hex dump (first 32 bytes):
33 2d 31 3a 30 2e 30 00 00 00 00 00 00 00 00 00 3-1:0.0.........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<0000000045f13983>] kvasprintf+0x6c/0xf0 lib/kasprintf.c:25
[<0000000044941061>] kvasprintf_const+0x58/0x110 lib/kasprintf.c:49
[<00000000c19829d3>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:289
[<00000000b2f7d014>] dev_set_name+0x63/0x90 drivers/base/core.c:2722
[<0000000071eb3ed0>] usb_set_configuration+0x6be/0xb90 drivers/usb/core/message.c:2094
[<00000000df7c22fc>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
[<00000000dbc03c2e>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
[<0000000061119d56>] really_probe+0x159/0x480 drivers/base/dd.c:554
[<000000009f962ea9>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
[<000000001459c72b>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
[<000000000532b098>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
[<00000000910da3ce>] __device_attach+0x122/0x250 drivers/base/dd.c:912
[<0000000072e90711>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
[<000000005cbbd88c>] device_add+0x5ac/0xc30 drivers/base/core.c:2936
[<00000000e7bc8059>] usb_new_device.cold+0x166/0x578 drivers/usb/core/hub.c:2554
[<00000000d9415aa4>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
[<00000000d9415aa4>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<00000000d9415aa4>] port_event drivers/usb/core/hub.c:5508 [inline]
[<00000000d9415aa4>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590
BUG: memory leak
unreferenced object 0xffff888125a0b300 (size 256):
comm "kworker/0:3", pid 8164, jiffies 4294944441 (age 13.560s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 b3 a0 25 81 88 ff ff ...........%....
08 b3 a0 25 81 88 ff ff f0 8b 58 82 ff ff ff ff ...%......X.....
backtrace:
[<000000009575797b>] kmalloc include/linux/slab.h:552 [inline]
[<000000009575797b>] kzalloc include/linux/slab.h:664 [inline]
[<000000009575797b>] device_private_init drivers/base/core.c:2778 [inline]
[<000000009575797b>] device_add+0x7e8/0xc30 drivers/base/core.c:2828
[<000000009e05d7ea>] usb_set_configuration+0x9de/0xb90 drivers/usb/core/message.c:2159
[<00000000df7c22fc>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
[<00000000dbc03c2e>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
[<0000000061119d56>] really_probe+0x159/0x480 drivers/base/dd.c:554
[<000000009f962ea9>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
[<000000001459c72b>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
[<000000000532b098>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
[<00000000910da3ce>] __device_attach+0x122/0x250 drivers/base/dd.c:912
[<0000000072e90711>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
[<000000005cbbd88c>] device_add+0x5ac/0xc30 drivers/base/core.c:2936
[<00000000e7bc8059>] usb_new_device.cold+0x166/0x578 drivers/usb/core/hub.c:2554
[<00000000d9415aa4>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
[<00000000d9415aa4>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<00000000d9415aa4>] port_event drivers/usb/core/hub.c:5508 [inline]
[<00000000d9415aa4>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590
[<000000004f0d05ee>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
[<00000000a8771f1e>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
[<00000000b8ee2caf>] kthread+0x178/0x1b0 kernel/kthread.c:292
BUG: memory leak
unreferenced object 0xffff888125b55800 (size 2048):
comm "kworker/0:1", pid 7, jiffies 4294944569 (age 12.280s)
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:
[<00000000dad779b6>] kmalloc include/linux/slab.h:552 [inline]
[<00000000dad779b6>] kzalloc include/linux/slab.h:664 [inline]
[<00000000dad779b6>] usb_alloc_dev+0x32/0x450 drivers/usb/core/usb.c:582
[<000000006a07019b>] hub_port_connect drivers/usb/core/hub.c:5128 [inline]
[<000000006a07019b>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<000000006a07019b>] port_event drivers/usb/core/hub.c:5508 [inline]
[<000000006a07019b>] hub_event+0x118d/0x20d0 drivers/usb/core/hub.c:5590
[<000000004f0d05ee>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
[<00000000a8771f1e>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
[<00000000b8ee2caf>] kthread+0x178/0x1b0 kernel/kthread.c:292
[<00000000e31b0818>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Tested on:
commit: 4d02da97 Merge tag 'net-5.10-rc5' of git://git.kernel.org/..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=12436fde500000
kernel config: https://syzkaller.appspot.com/x/.config?x=b29e92cdfa2687df
dashboard link: https://syzkaller.appspot.com/bug?extid=44e64397bd81d5e84cba
compiler: gcc (GCC) 10.1.0-syz 20200507
patch: https://syzkaller.appspot.com/x/patch.diff?x=1197fc2d500000
