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 0xffff88812695d400 (size 1024):
comm "kworker/1:2", pid 3876, jiffies 4294944657 (age 14.950s)
hex dump (first 32 bytes):
c8 ee 8d 26 81 88 ff ff c8 ee 8d 26 81 88 ff ff ...&.......&....
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000e23bdd53>] kmalloc include/linux/slab.h:552 [inline]
[<00000000e23bdd53>] kzalloc include/linux/slab.h:664 [inline]
[<00000000e23bdd53>] usb_set_configuration+0x18c/0xb90 drivers/usb/core/message.c:1987
[<0000000075483a2c>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
[<00000000e7052b0c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
[<0000000084544ac0>] really_probe+0x159/0x480 drivers/base/dd.c:554
[<00000000b1ca23bf>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
[<0000000071b8d8fa>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
[<00000000b1c25910>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
[<00000000104c17ae>] __device_attach+0x122/0x250 drivers/base/dd.c:912
[<00000000b93cff33>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
[<0000000098ed347d>] device_add+0x5ac/0xc30 drivers/base/core.c:2936
[<000000008afe4d3b>] usb_new_device.cold+0x166/0x578 drivers/usb/core/hub.c:2554
[<000000000db8d2bb>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
[<000000000db8d2bb>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<000000000db8d2bb>] port_event drivers/usb/core/hub.c:5508 [inline]
[<000000000db8d2bb>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590
[<00000000d321de91>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
[<0000000038230b58>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
[<00000000a1e60acf>] kthread+0x178/0x1b0 kernel/kthread.c:292
[<00000000d5e1cdc3>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
BUG: memory leak
unreferenced object 0xffff8881269b6560 (size 32):
comm "kworker/1:2", pid 3876, jiffies 4294944657 (age 14.950s)
hex dump (first 32 bytes):
36 2d 31 3a 30 2e 30 00 00 00 00 00 00 00 00 00 6-1:0.0.........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000e5418e58>] kvasprintf+0x6c/0xf0 lib/kasprintf.c:25
[<00000000a3c51b27>] kvasprintf_const+0x58/0x110 lib/kasprintf.c:49
[<000000002234e01b>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:289
[<00000000f280c658>] dev_set_name+0x63/0x90 drivers/base/core.c:2722
[<000000008b5b3978>] usb_set_configuration+0x6be/0xb90 drivers/usb/core/message.c:2094
[<0000000075483a2c>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
[<00000000e7052b0c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
[<0000000084544ac0>] really_probe+0x159/0x480 drivers/base/dd.c:554
[<00000000b1ca23bf>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
[<0000000071b8d8fa>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
[<00000000b1c25910>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
[<00000000104c17ae>] __device_attach+0x122/0x250 drivers/base/dd.c:912
[<00000000b93cff33>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
[<0000000098ed347d>] device_add+0x5ac/0xc30 drivers/base/core.c:2936
[<000000008afe4d3b>] usb_new_device.cold+0x166/0x578 drivers/usb/core/hub.c:2554
[<000000000db8d2bb>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
[<000000000db8d2bb>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<000000000db8d2bb>] port_event drivers/usb/core/hub.c:5508 [inline]
[<000000000db8d2bb>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590
BUG: memory leak
unreferenced object 0xffff8881263eff00 (size 256):
comm "kworker/1:2", pid 3876, jiffies 4294944661 (age 14.910s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 ff 3e 26 81 88 ff ff ..........>&....
08 ff 3e 26 81 88 ff ff f0 8b 58 82 ff ff ff ff ..>&......X.....
backtrace:
[<000000001dc8ab7b>] kmalloc include/linux/slab.h:552 [inline]
[<000000001dc8ab7b>] kzalloc include/linux/slab.h:664 [inline]
[<000000001dc8ab7b>] device_private_init drivers/base/core.c:2778 [inline]
[<000000001dc8ab7b>] device_add+0x7e8/0xc30 drivers/base/core.c:2828
[<00000000268b1f35>] usb_set_configuration+0x9de/0xb90 drivers/usb/core/message.c:2159
[<0000000075483a2c>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
[<00000000e7052b0c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
[<0000000084544ac0>] really_probe+0x159/0x480 drivers/base/dd.c:554
[<00000000b1ca23bf>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
[<0000000071b8d8fa>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
[<00000000b1c25910>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
[<00000000104c17ae>] __device_attach+0x122/0x250 drivers/base/dd.c:912
[<00000000b93cff33>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
[<0000000098ed347d>] device_add+0x5ac/0xc30 drivers/base/core.c:2936
[<000000008afe4d3b>] usb_new_device.cold+0x166/0x578 drivers/usb/core/hub.c:2554
[<000000000db8d2bb>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
[<000000000db8d2bb>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<000000000db8d2bb>] port_event drivers/usb/core/hub.c:5508 [inline]
[<000000000db8d2bb>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590
[<00000000d321de91>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
[<0000000038230b58>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
[<00000000a1e60acf>] kthread+0x178/0x1b0 kernel/kthread.c:292
BUG: memory leak
unreferenced object 0xffff888126ad1800 (size 2048):
comm "kworker/0:3", pid 4909, jiffies 4294944664 (age 14.880s)
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:
[<0000000083df40a5>] kmalloc include/linux/slab.h:552 [inline]
[<0000000083df40a5>] kzalloc include/linux/slab.h:664 [inline]
[<0000000083df40a5>] usb_alloc_dev+0x32/0x450 drivers/usb/core/usb.c:582
[<000000006a2b040a>] hub_port_connect drivers/usb/core/hub.c:5128 [inline]
[<000000006a2b040a>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
[<000000006a2b040a>] port_event drivers/usb/core/hub.c:5508 [inline]
[<000000006a2b040a>] hub_event+0x118d/0x20d0 drivers/usb/core/hub.c:5590
[<00000000d321de91>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
[<0000000038230b58>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
[<00000000a1e60acf>] kthread+0x178/0x1b0 kernel/kthread.c:292
[<00000000d5e1cdc3>] 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=110c7521500000
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=10a8b8f1500000
