Nouveau - Feb 2010 - [Bug 26767] New: kmemleak complain about possible memory leak

http://bugs.freedesktop.org/show_bug.cgi?id=26767

           Summary: kmemleak complain about possible memory leak
           Product: xorg
           Version: 7.5
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: me at felipebalbi.com
         QAContact: xorg-team at lists.x.org


When running kernel with kmemleak enabled, we keep seeing on dmesg suspects of
new memory leaks, looking at /sys/kernel/debug/kmemleak says that nouveau might
be the one to be blamed:

unreferenced object 0xf6175390 (size 148):
  comm "X", pid 8910, jiffies 4294890281 (age 6196.003s)
  hex dump (first 32 bytes):
    06 82 00 00 00 00 00 00 e0 84 a8 f3 80 81 a8 f3  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<c1433abb>] kmemleak_alloc+0x2a/0x47
    [<c10b5faa>] kmem_cache_alloc+0xa8/0xf6
    [<c11a11b5>] idr_pre_get+0x27/0x60
    [<f8144ca2>] drm_gem_handle_create+0x25/0x6f [drm]
    [<f81f6780>] nouveau_gem_ioctl_new+0x201/0x262 [nouveau]
    [<f81436a1>] drm_ioctl+0x268/0x310 [drm]
    [<c10c6238>] vfs_ioctl+0x27/0x8c
    [<c10c67b4>] do_vfs_ioctl+0x46e/0x4a8
    [<c10c6833>] sys_ioctl+0x45/0x5f
    [<c100290c>] sysenter_do_call+0x12/0x22
    [<ffffffff>] 0xffffffff

As an extra detail, I'm using current linux-2.6 head
(baac35c4155a8aa826c70acee6553368ca5243a2) plus x11 overlay on gentoo


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http://bugs.freedesktop.org/show_bug.cgi?id=26767





--- Comment #1 from Felipe Balbi <me at felipebalbi.com>  2010-02-26
01:59:36 PST ---
looking at the actual code, it appears to be a false positive since
idr_remove() is called on drm_gem_handle_delete(). If I'm right, please
close
this bug and sorry for the inconvenience.


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https://bugs.freedesktop.org/show_bug.cgi?id=26767

Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #2 from Ilia Mirkin <imirkin at alum.mit.edu> ---
It appears that this bug report has laid dormant for quite a while. Sorry we
haven't gotten to it. Since we fix bugs all the time, chances are pretty
good
that your issue has been fixed with the latest software. Please give it a shot.
(Linux kernel 3.10.7, xf86-video-nouveau 1.0.9, mesa 9.1.6, or their git
versions.) If upgrading to the latest isn't an option for you, your
distro's
bugzilla is probably the right destination for your bug report.

In an effort to clean up our bug list, we're pre-emptively closing all bugs
that haven't seen updates since 2011. If the original issue remains, please
make sure to provide fresh info, see http://nouveau.freedesktop.org/wiki/Bugs/
for what we need to see, and re-open this one.

Thanks,

The Nouveau Team

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