On Wed, Mar 09, 2022 at 03:54:24PM -0800, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 0014404f9c18 Merge branch 'akpm' (patches from Andrew) > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=15864216700000 > kernel config: https://syzkaller.appspot.com/x/.config?x=3f0a704147ec8e32 > dashboard link: https://syzkaller.appspot.com/bug?extid=f0fae482604e6d9a87c9 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13a63dbe700000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10e150a1700000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+f0fae482604e6d9a87c9@xxxxxxxxxxxxxxxxxxxxxxxxx > > BUG: memory leak > unreferenced object 0xffff88810c0289e0 (size 32): > comm "kworker/1:2", pid 139, jiffies 4294947862 (age 15.910s) > hex dump (first 32 bytes): > 09 02 12 00 01 00 00 00 00 09 04 00 00 00 d0 bb ................ > 3a 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 :............... > backtrace: > [<ffffffff82c98127>] kmalloc include/linux/slab.h:586 [inline] > [<ffffffff82c98127>] usb_get_configuration+0x1c7/0x1cd0 drivers/usb/core/config.c:919 > [<ffffffff82c863f9>] usb_enumerate_device drivers/usb/core/hub.c:2398 [inline] > [<ffffffff82c863f9>] usb_new_device+0x1a9/0x2e0 drivers/usb/core/hub.c:2536 > [<ffffffff82c88ea4>] hub_port_connect drivers/usb/core/hub.c:5358 [inline] > [<ffffffff82c88ea4>] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] > [<ffffffff82c88ea4>] port_event drivers/usb/core/hub.c:5660 [inline] > [<ffffffff82c88ea4>] hub_event+0x1364/0x21a0 drivers/usb/core/hub.c:5742 > [<ffffffff8126a41f>] process_one_work+0x2bf/0x600 kernel/workqueue.c:2307 > [<ffffffff8126ad49>] worker_thread+0x59/0x5b0 kernel/workqueue.c:2454 > [<ffffffff81274705>] kthread+0x125/0x160 kernel/kthread.c:377 > [<ffffffff810021ef>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The console log shows that this is connected to gspca_dev_probe. Let's see who's calling it... Alan Stern #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ 0014404f9c18 Index: usb-devel/drivers/media/usb/gspca/gspca.c =================================================================== --- usb-devel.orig/drivers/media/usb/gspca/gspca.c +++ usb-devel/drivers/media/usb/gspca/gspca.c @@ -1599,6 +1599,7 @@ int gspca_dev_probe(struct usb_interface if (dev->descriptor.bNumConfigurations != 1) { pr_err("%04x:%04x too many config\n", id->idVendor, id->idProduct); + dump_stack(); return -ENODEV; }
