[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522


Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Console/Framebuffers        |Video(DRI - non Intel)
         AssignedTo|alan@lxorguk.ukuu.org.uk    |drivers_video-dri@kernel-bu
                   |                            |gs.osdl.org




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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522





--- Comment #9 from Christian Casteyde <casteyde.christian@free.fr>  2012-08-05 21:28:16 ---
Update:
Still present in 3.6-rc1

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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522





--- Comment #10 from Christian Casteyde <casteyde.christian@free.fr>  2012-10-21 21:49:34 ---
Update:
Still present in 3.7-rc2 on Slackware 64 + xf86-video-ati-6.14.6 +
libdrm-2.4.39-x86_64

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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522





--- Comment #11 from Christian Casteyde <casteyde.christian@free.fr>  2013-01-03 12:55:07 ---
Udpate:
Still present in 3.8-rc2

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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522

--- Comment #12 from Christian Casteyde <casteyde.christian@free.fr> ---
Update:
Still present in 3.11-rc7

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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522

Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Kernel Version|3.4-rc4                     |3.11

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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522

--- Comment #13 from Christian Casteyde <casteyde.christian@free.fr> ---
Update:
Still present in 4.7-rc6

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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522

bastienphilbert@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bastienphilbert@gmail.com

--- Comment #14 from bastienphilbert@gmail.com ---
See if the below patch fixes the issue as it seems your not allocating memory
for the cmap.

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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522

--- Comment #15 from bastienphilbert@gmail.com ---
Created attachment 227551
  --> https://bugzilla.kernel.org/attachment.cgi?id=227551&action=edit
Cmap Fix

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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522

--- Comment #16 from Christian Casteyde <casteyde.christian@free.fr> ---
No, I still have this:
[ 1215.037018] WARNING: kmemcheck: Caught 16-bit read from uninitialized memory
(ffff8801c307d020)
[ 1215.037029] 2e032b012206070e0307373e033534262327353721171507111e031514062322
[ 1215.037038]  u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u
[ 1215.037039]  ^
[ 1215.037046] RIP: 0010:[<ffffffff81442b8b>]  [<ffffffff81442b8b>]
drm_fb_helper_setcmap+0x15b/0x420
[ 1215.037047] RSP: 0018:ffff8801b9fc7a30  EFLAGS: 00010286
[ 1215.037048] RAX: 0000000000000010 RBX: 0000000000000010 RCX:
0000000000000000
[ 1215.037049] RDX: 00000000000000ff RSI: 0000000000ffff00 RDI:
ffff8801c3064390
[ 1215.037050] RBP: ffff8801b9fc7ad8 R08: ffff8801c307c840 R09:
ffff8801c307d200
[ 1215.037051] R10: ffff8801c307d022 R11: 000000000000ffff R12:
ffff8801c307d220
[ 1215.037051] R13: ffff8801c307d420 R14: ffff8801c307c800 R15:
ffff8801c3064000
[ 1215.037053] FS:  00007f35566fd8c0(0000) GS:ffff8801c7400000(0000)
knlGS:0000000000000000
[ 1215.037054] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1215.037055] CR2: ffff8801c29306c0 CR3: 00000000a8911000 CR4:
00000000000406f0
[ 1215.037058]  [<ffffffff813d5009>] fb_set_cmap+0x49/0x130
[ 1215.037060]  [<ffffffff813d2769>] fb_set_var+0x279/0x460
[ 1215.037063]  [<ffffffff813cba4b>] fbcon_blank+0x33b/0x380
[ 1215.037066]  [<ffffffff8142d966>] do_unblank_screen+0xc6/0x190
[ 1215.037069]  [<ffffffff81424263>] vt_ioctl+0x533/0x1430
[ 1215.037071]  [<ffffffff8141950c>] tty_ioctl+0x38c/0xe90
[ 1215.037073]  [<ffffffff811aed7e>] do_vfs_ioctl+0x8e/0x670
[ 1215.037075]  [<ffffffff811af39c>] SyS_ioctl+0x3c/0x70
[ 1215.037078]  [<ffffffff8193fee5>] entry_SYSCALL_64_fastpath+0x18/0xa8
[ 1215.037080]  [<ffffffffffffffff>] 0xffffffffffffffff

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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522

--- Comment #17 from bastienphilbert@gmail.com ---
Can you find out what drm driver you are currently using as all of them link to
the core function that is leaking memory and knowing which drive is doing it
would be very helpful.

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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522

--- Comment #18 from Christian Casteyde <casteyde.christian@free.fr> ---
See comment #3, #4 and #5.

I think i'm using radeon driver with kms since the only graphic chip I have on
my laptop is a Radeon 6650M (no intel graphic in CPU, has been deactivated by
vendor).

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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522

Christian Casteyde (casteyde.christian@free.fr) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |OBSOLETE

--- Comment #19 from Christian Casteyde (casteyde.christian@free.fr) ---
Closing as too old and I do not have the hardware anymore to reproduce.

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[Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36522

Christian Casteyde (casteyde.christian@free.fr) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

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