* [Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap
[not found] <bug-36522-2300@https.bugzilla.kernel.org/>
@ 2012-05-14 14:25 ` bugzilla-daemon
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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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^ permalink raw reply [flat|nested] 14+ messages in thread* [Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap
[not found] <bug-36522-2300@https.bugzilla.kernel.org/>
2012-05-14 14:25 ` [Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap bugzilla-daemon
@ 2012-08-05 21:28 ` bugzilla-daemon
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From: bugzilla-daemon @ 2012-08-05 21:28 UTC (permalink / raw)
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--- 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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2012-05-14 14:25 ` [Bug 36522] Caught 16-bit read from uninitialized memory in drm_fb_helper_setcmap bugzilla-daemon
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--- 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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--- 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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--- Comment #12 from Christian Casteyde <casteyde.christian@free.fr> ---
Update:
Still present in 3.11-rc7
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Alan <alan@lxorguk.ukuu.org.uk> changed:
What |Removed |Added
----------------------------------------------------------------------------
Kernel Version|3.4-rc4 |3.11
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--- Comment #13 from Christian Casteyde <casteyde.christian@free.fr> ---
Update:
Still present in 4.7-rc6
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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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--- 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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From: bugzilla-daemon @ 2016-08-05 7:54 UTC (permalink / raw)
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--- 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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--- 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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From: bugzilla-daemon @ 2016-08-06 5:58 UTC (permalink / raw)
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--- 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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From: bugzilla-daemon @ 2022-02-17 18:19 UTC (permalink / raw)
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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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Christian Casteyde (casteyde.christian@free.fr) changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
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