Begin forwarded message:
Date: Sun, 19 Nov 2006 08:45:31 -0800 From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: [Bug 7552] New: Memory leak in hid_parse_report http://bugzilla.kernel.org/show_bug.cgi?id=7552 Summary: Memory leak in hid_parse_report Kernel Version: 2.6.19-rc6 Status: NEW Severity: normal Owner: [EMAIL PROTECTED] Submitter: [EMAIL PROTECTED] CC: [EMAIL PROTECTED] Most recent kernel where this bug did *NOT* occur: probably before 2.6.12 Distribution: Ubuntu 6.06 Hardware Environment: Fujitsu-Siemens laptop, USB mouse Software Environment: X, Gnome Problem Description: Leaked hid_collection object allocated in hid_parse_report. The object allocation backtrace reported by kmemleak is: unreferenced object 0xdd2259fc (size 192): [<c019727b>] __kmalloc_track_caller [<c01809a5>] __kzalloc [<e02dfb46>] hid_parse_report [<e02e1b95>] usb_hid_configure [<e02e2174>] hid_probe [<e0053ccf>] usb_probe_interface [<c02c05ba>] really_probe [<ffffffff>] This is actually the device->collection pointer assigned in hid_parse_report() but not freed when the device is disconnected. My attempt to free dev->collection in hid_free_device() didn't solve the issue. I suspect that a dev->collection kfree is missing on the hiddev_disconnect() path but I am not familiar with this code to provide a proper fix. Steps to reproduce: The bug can be reproduced by connecting and disconnecting a USB mouse. The latest kmemleak patch needs to be applied (http://homepage.ntlworld.com/cmarinas/kmemleak/patch-2.6.19-rc1-kmemleak-0.11.bz2), CONFIG_DEBUG_MEMLEAK enabled and debugfs mounted on /sys/kernel/debug/. Reading the /sys/kernel/debug/memleak file will show the backtrace of the unreferenced objects. ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
