Re: [Bug 670369] Re: sqliteodbc/amd64 does not compile with unixodbc-dev-2.2.14p2-1ubuntu1

2015-07-28 Thread Simon Schubert 
I'm not using Ubuntu anymore, so I cannot test.

On 07/28/2015 06:53 PM, Rolf Leggewie wrote:
> does this ever occur in trusty or later?
>
> ** Changed in: sqliteodbc (Ubuntu)
>Status: New => Incomplete
>
> ** Changed in: sqliteodbc (Ubuntu)
>  Assignee: (unassigned) => Rolf Leggewie (r0lf)
>

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Title:
  sqliteodbc/amd64 does not compile with unixodbc-dev-2.2.14p2-1ubuntu1

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[Bug 415357]

2012-02-22 Thread Simon Schubert 
Created attachment 57155
reorder Bresenham error correction to avoid overshoot.

When fbBresSolid draws a line, it can happen that after the last
pixel, the Bresenham error term overflows, and fbBresSolid paints
another pixel before adjusting the error term.

However, if this happens on the last pixel (len=0), this extra pixel
might overshoot the boundary, and, in rare cases, lead to a segfault.

Fix this issue by adjusting for the Bresenham error term before
drawing the main pixel, not after.

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[Bug 416421]

2012-02-22 Thread Simon Schubert 
Created attachment 57155
reorder Bresenham error correction to avoid overshoot.

When fbBresSolid draws a line, it can happen that after the last
pixel, the Bresenham error term overflows, and fbBresSolid paints
another pixel before adjusting the error term.

However, if this happens on the last pixel (len=0), this extra pixel
might overshoot the boundary, and, in rare cases, lead to a segfault.

Fix this issue by adjusting for the Bresenham error term before
drawing the main pixel, not after.

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  [gm45] X crash on X200s with dual monitors (using DisplayPort)

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[Bug 415357]

2012-01-26 Thread Simon Schubert 
Just a follow-up to say that solution (d) seems to work for me.

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[Bug 415357]

2012-01-26 Thread Simon Schubert 
Ah.  I believe this is the problem, or at least very closely related:

:
if (clip2 != 0 || drawLast)
len++;

in combination with these variables:

new_x1 = 36
new_x2 = 0
new_y1 = 16
new_y2 = 0
clip2 = 10
len = 37

This incremented len to 37, extending (in reverse) the line below (0,
0), which leads to a segmentation fault.

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[Bug 415357]

2012-01-26 Thread Simon Schubert 
Ok, I see what is going on there.

The len++ is to make the end coordinates inclusive, which they should be
if drawLast is set, or if we clipped the end.

Now, we changed the end coordinates, but we keep the Bresenham error
terms, because we want the same angle (I suppose).

However, if we look at fbBresSolid, we see this sequence:

while (len--)
{
...
/// (1) ///
WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));
bits = 0;
dst += signdx;
...
e += e1;
/// (2) ///
if (e >= 0)
{
/// (3) ///
WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));
bits = 0;
dst += dstStride;
e += e3;
}
}

Now assume we have arrived at len = 1.  We start the last iteration for
the last pixel, at (x2,y2).  We draw the pixel (location (1)), and we
*should* be done.  However, because of the previously unmodified
Bresenham error terms, it can happen that the error total overflows
(location (2)), and we will draw another pixel, now at (x2+signdx,y2),
before adjusting the error terms and exiting the loop.

In short, it might happen that (I'm using signdx=-1, just because my
case happens to be that way):

- (orig_x2, orig_y2) get clipped
- the algorithm then goes on to draw:

(x1,y1), (x1-1,y1), ..., (x2,y2), (x2-1,y2)

Now, if x2 = 0, y2 = 0, then we overshoot into negative address land
(-1,0) and might segfault (actually do).


Solutions
=

I don't directly see how this could be fixed:

a) Check dst for every Bresenham error pixel, but that seems excessive.
b) Adjust the error terms, but that would change the slope of the line 
(slightly)
c) Check for this case in advance and reduce len, but then you'd lose one pixel 
at the end
d) Rewrite fbseg to draw the error pixel in the next iteration, instead of in 
the same.  This touches central code though.

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[Bug 415357]

2012-01-26 Thread Simon Schubert 
The problem seems to be that there are negative coordinates being passed
in to ProcPolySegment:

(gdb) p/x *(xSegment*)&((xPolySegmentReq *)0x2918e1c)[1]
  
$11 = {x1 = 0x24, y1 = 0x10, x2 = 0xfffe, y2 = 0x}

I don't know who is supposed to catch this.  Looking at the call
sequence, nobody really makes sure that these values are in bounds.

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[Bug 416421]

2012-01-26 Thread Simon Schubert 
Just a follow-up to say that solution (d) seems to work for me.

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  [gm45] X crash on X200s with dual monitors (using DisplayPort)

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[Bug 415357]

2012-01-26 Thread Simon Schubert 
Created attachment 56113
gdb backtrace

gdb backtrace of the bug.  dst is out of bounds.  I can provide core
file and binaries if required.

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[Bug 416421]

2012-01-26 Thread Simon Schubert 
Ok, I see what is going on there.

The len++ is to make the end coordinates inclusive, which they should be
if drawLast is set, or if we clipped the end.

Now, we changed the end coordinates, but we keep the Bresenham error
terms, because we want the same angle (I suppose).

However, if we look at fbBresSolid, we see this sequence:

while (len--)
{
...
/// (1) ///
WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));
bits = 0;
dst += signdx;
...
e += e1;
/// (2) ///
if (e >= 0)
{
/// (3) ///
WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));
bits = 0;
dst += dstStride;
e += e3;
}
}

Now assume we have arrived at len = 1.  We start the last iteration for
the last pixel, at (x2,y2).  We draw the pixel (location (1)), and we
*should* be done.  However, because of the previously unmodified
Bresenham error terms, it can happen that the error total overflows
(location (2)), and we will draw another pixel, now at (x2+signdx,y2),
before adjusting the error terms and exiting the loop.

In short, it might happen that (I'm using signdx=-1, just because my
case happens to be that way):

- (orig_x2, orig_y2) get clipped
- the algorithm then goes on to draw:

(x1,y1), (x1-1,y1), ..., (x2,y2), (x2-1,y2)

Now, if x2 = 0, y2 = 0, then we overshoot into negative address land
(-1,0) and might segfault (actually do).


Solutions
=

I don't directly see how this could be fixed:

a) Check dst for every Bresenham error pixel, but that seems excessive.
b) Adjust the error terms, but that would change the slope of the line 
(slightly)
c) Check for this case in advance and reduce len, but then you'd lose one pixel 
at the end
d) Rewrite fbseg to draw the error pixel in the next iteration, instead of in 
the same.  This touches central code though.

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Title:
  [gm45] X crash on X200s with dual monitors (using DisplayPort)

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[Bug 416421]

2012-01-26 Thread Simon Schubert 
Ah.  I believe this is the problem, or at least very closely related:

:
if (clip2 != 0 || drawLast)
len++;

in combination with these variables:

new_x1 = 36
new_x2 = 0
new_y1 = 16
new_y2 = 0
clip2 = 10
len = 37

This incremented len to 37, extending (in reverse) the line below (0,
0), which leads to a segmentation fault.

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Title:
  [gm45] X crash on X200s with dual monitors (using DisplayPort)

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[Bug 416421]

2012-01-26 Thread Simon Schubert 
Created attachment 56113
gdb backtrace

gdb backtrace of the bug.  dst is out of bounds.  I can provide core
file and binaries if required.

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Title:
  [gm45] X crash on X200s with dual monitors (using DisplayPort)

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[Bug 416421]

2012-01-26 Thread Simon Schubert 
The problem seems to be that there are negative coordinates being passed
in to ProcPolySegment:

(gdb) p/x *(xSegment*)&((xPolySegmentReq *)0x2918e1c)[1]
  
$11 = {x1 = 0x24, y1 = 0x10, x2 = 0xfffe, y2 = 0x}

I don't know who is supposed to catch this.  Looking at the call
sequence, nobody really makes sure that these values are in bounds.

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  [gm45] X crash on X200s with dual monitors (using DisplayPort)

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[Bug 415357]

2012-01-24 Thread Simon Schubert 
I experience a related bug when using KiCad:

[  2507.868] 
Backtrace:
[  2507.868] 0: /usr/bin/X (xorg_backtrace+0x26) [0x566a86]
[  2507.868] 1: /usr/bin/X (0x40+0x16a6e9) [0x56a6e9]
[  2507.868] 2: /lib/libpthread.so.0 (0x7fa9d12c8000+0xf8a0) [0x7fa9d12d78a0]
[  2507.868] 3: /usr/lib/xorg/modules/libfb.so (fbBresSolid+0x21c) 
[0x7fa9cd94a1cc]
[  2507.868] 4: /usr/lib/xorg/modules/libfb.so (fbSegment+0x3f7) 
[0x7fa9cd94b667]
[  2507.868] 5: /usr/lib/xorg/modules/libfb.so (fbPolySegment32+0x4bd) 
[0x7fa9cd93f88d]
[  2507.868] 6: /usr/lib/xorg/modules/drivers/intel_drv.so 
(0x7fa9ce38+0x380cc) [0x7fa9ce3b80cc]
[  2507.868] 7: /usr/lib/xorg/modules/drivers/intel_drv.so 
(0x7fa9ce38+0x2f1ec) [0x7fa9ce3af1ec]
[  2507.868] 8: /usr/bin/X (0x40+0xf9a3f) [0x4f9a3f]
[  2507.868] 9: /usr/bin/X (0x40+0x302a3) [0x4302a3]
[  2507.868] 10: /usr/bin/X (0x40+0x33cb9) [0x433cb9]
[  2507.868] 11: /usr/bin/X (0x40+0x22eea) [0x422eea]
[  2507.868] 12: /lib/libc.so.6 (__libc_start_main+0xed) [0x7fa9d017f38d]
[  2507.868] 13: /usr/bin/X (0x40+0x231dd) [0x4231dd]
[  2507.868] Segmentation fault at address 0x7fa9cc816ffc

It is reproducible.

No idea why the intel driver symbols don't show up, but addr2line shows
me:

0x380cc = xf86-video-intel-2.17.0/uxa/uxa-unaccel.c:24 = 
uxa_check_poly_segment()
0x2f1ec = xf86-video-intel-2.17.0/uxa/uxa-accel.c:624 = uxa_poly_segment()

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[Bug 416421]

2012-01-24 Thread Simon Schubert 
I experience a related bug when using KiCad:

[  2507.868] 
Backtrace:
[  2507.868] 0: /usr/bin/X (xorg_backtrace+0x26) [0x566a86]
[  2507.868] 1: /usr/bin/X (0x40+0x16a6e9) [0x56a6e9]
[  2507.868] 2: /lib/libpthread.so.0 (0x7fa9d12c8000+0xf8a0) [0x7fa9d12d78a0]
[  2507.868] 3: /usr/lib/xorg/modules/libfb.so (fbBresSolid+0x21c) 
[0x7fa9cd94a1cc]
[  2507.868] 4: /usr/lib/xorg/modules/libfb.so (fbSegment+0x3f7) 
[0x7fa9cd94b667]
[  2507.868] 5: /usr/lib/xorg/modules/libfb.so (fbPolySegment32+0x4bd) 
[0x7fa9cd93f88d]
[  2507.868] 6: /usr/lib/xorg/modules/drivers/intel_drv.so 
(0x7fa9ce38+0x380cc) [0x7fa9ce3b80cc]
[  2507.868] 7: /usr/lib/xorg/modules/drivers/intel_drv.so 
(0x7fa9ce38+0x2f1ec) [0x7fa9ce3af1ec]
[  2507.868] 8: /usr/bin/X (0x40+0xf9a3f) [0x4f9a3f]
[  2507.868] 9: /usr/bin/X (0x40+0x302a3) [0x4302a3]
[  2507.868] 10: /usr/bin/X (0x40+0x33cb9) [0x433cb9]
[  2507.868] 11: /usr/bin/X (0x40+0x22eea) [0x422eea]
[  2507.868] 12: /lib/libc.so.6 (__libc_start_main+0xed) [0x7fa9d017f38d]
[  2507.868] 13: /usr/bin/X (0x40+0x231dd) [0x4231dd]
[  2507.868] Segmentation fault at address 0x7fa9cc816ffc

It is reproducible.

No idea why the intel driver symbols don't show up, but addr2line shows
me:

0x380cc = xf86-video-intel-2.17.0/uxa/uxa-unaccel.c:24 = 
uxa_check_poly_segment()
0x2f1ec = xf86-video-intel-2.17.0/uxa/uxa-accel.c:624 = uxa_poly_segment()

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[Bug 711678] Re: Double entry of event in the OWA, for an event created with Lightning

2011-08-01 Thread Simon Schubert 
Should be fixed in 0.17.

I'll try to update the changelog -- that's a good idea.

Yes, addons.mozilla.org takes quite a long time to review new versions.
Unfortunately there is nothing I can do about this.

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Title:
  Double entry of event in the OWA, for an event created with Lightning

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[Bug 711678] Re: Double entry of event in the OWA, for an event created with Lightning

2011-07-29 Thread Simon Schubert 
** Changed in: lightning-exchange-provider
   Status: Fix Committed => Fix Released

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  Double entry of event in the OWA, for an event created with Lightning

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[Bug 711678] Re: Double entry of event in the OWA, for an event created with Lightning

2011-07-29 Thread Simon Schubert 
** Changed in: lightning-exchange-provider
   Status: Confirmed => Fix Committed

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  Double entry of event in the OWA, for an event created with Lightning

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[Bug 711678] Re: Double entry of event in the OWA, for an event created with Lightning

2011-07-28 Thread Simon Schubert 
Good news, I found the bug!

The problem is that if you click Save+Close, Thunderbird will do this in
exactly this sequence.  The save triggers an update XMLHttpRequest which
also gets sent.  The subsequent close, however, will cancel the
XMLHttpRequest (even though it already was sent and was received by the
server).  That makes the request return a bogus error, and the request
gets retried.  Voila, 2 events created.

I'll look into how to fix this, but any help is appreciated.

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  Double entry of event in the OWA, for an event created with Lightning

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[Bug 711678] Re: Double entry of event in the OWA, for an event created with Lightning

2011-07-08 Thread Simon Schubert 
** Changed in: lightning-exchange-provider
   Importance: Undecided => High

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  Double entry of event in the OWA, for an event created with Lightning

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[Bug 711678] Re: Double entry of event in the OWA, for an event created with Lightning

2011-07-06 Thread Simon Schubert 
Perfectly valid, just not related to the Ubuntu distribution.

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[Bug 711678] Re: Double entry of event in the OWA, for an event created with Lightning

2011-07-05 Thread Simon Schubert 
** Changed in: ubuntu
   Status: New => Invalid

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[Bug 249958] Re: touching a fullscreen application with the mousepointer puts it in front

2011-07-05 Thread Simon Schubert 
I can reproduce this bug.  However, only one of my machines exhibits
this behavior.

** Also affects: metacity via
   https://bugzilla.gnome.org/show_bug.cgi?id=356829
   Importance: Unknown
   Status: Unknown

** Changed in: metacity (Ubuntu)
   Status: Invalid => Confirmed

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  touching a fullscreen application with the mousepointer puts it in
  front

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[Bug 670369] Re: sqliteodbc/amd64 does not compile with unixodbc-dev-2.2.14p2-1ubuntu1

2010-11-03 Thread Simon Schubert 
you can also pull from my branch, it contains another fix that is
required for erlang-odbc.  This other fix has been submitted upstream
and was integrated in 0.86.

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sqliteodbc/amd64 does not compile with unixodbc-dev-2.2.14p2-1ubuntu1
https://bugs.launchpad.net/bugs/670369
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[Bug 670369] Re: sqliteodbc/amd64 does not compile with unixodbc-dev-2.2.14p2-1ubuntu1

2010-11-03 Thread Simon Schubert 

** Patch added: "no-sqlrowcount.patch"
   
https://bugs.launchpad.net/bugs/670369/+attachment/1721698/+files/no-sqlrowcount.patch

-- 
sqliteodbc/amd64 does not compile with unixodbc-dev-2.2.14p2-1ubuntu1
https://bugs.launchpad.net/bugs/670369
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[Bug 670369] [NEW] sqliteodbc/amd64 does not compile with unixodbc-dev-2.2.14p2-1ubuntu1

2010-11-03 Thread Simon Schubert 
Public bug reported:

debuild compiler output:

sqliteodbc.c: At top level:
sqliteodbc.c:7076: error: conflicting types for 'SQLSetStmtOption'
/usr/include/sql.h:796: note: previous declaration of 'SQLSetStmtOption' was 
here

This is because SQLSetStmtOption uses the SQLROWCOUNT type which does
not exist in /usr/include/sqltypes.h for 64 bit systems:

/* 
 * These are not supprted on 64bit ODBC according to MS, removed, so use at 
your peril
 *
 typedef SQLULEN SQLROWCOUNT;
 typedef SQLULEN SQLROWSETSIZE;
 typedef SQLULEN SQLTRANSID;
 typedef SQLLEN  SQLROWOFFSET;
*/

SQLSetStmtOption is instead declared with SQLULEN in /usr/include/sql.h.

** Affects: sqliteodbc (Ubuntu)
 Importance: Undecided
 Status: New

-- 
sqliteodbc/amd64 does not compile with unixodbc-dev-2.2.14p2-1ubuntu1
https://bugs.launchpad.net/bugs/670369
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[Bug 510483] Re: Gnome-terminal ignores /usr/share/vte/termcap/xterm

2010-09-27 Thread Simon Schubert 
(referring to the current Lucid version)

-- 
Gnome-terminal ignores /usr/share/vte/termcap/xterm
https://bugs.launchpad.net/bugs/510483
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[Bug 510483] Re: Gnome-terminal ignores /usr/share/vte/termcap/xterm

2010-09-27 Thread Simon Schubert 
This is the wrong fix.  If you can configure the size in the
terminal/profile preferences, you don't need to modify the termcap entry
anymore.

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Gnome-terminal ignores /usr/share/vte/termcap/xterm
https://bugs.launchpad.net/bugs/510483
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[Bug 613700] Re: kernel BUG at /build/buildd/linux-2.6.32/drivers/char/tty_ldisc.c:707!

2010-08-17 Thread Simon Schubert 
I can confirm this BUG:

[  233.292555] hub 8-0:1.0: port 1 disabled by hub (EMI?), re-enabling...
[  233.292562] usb 8-1: USB disconnect, address 2
[  233.292685] [ cut here ]
[  233.292688] kernel BUG at 
/build/buildd/linux-2.6.32/drivers/char/tty_ldisc.c:707!
[  233.292691] invalid opcode:  [#1] SMP 
[  233.292695] last sysfs file: /sys/devices/pci:00/:00:1f.3/local_cpus
[  233.292698] CPU 2 
[  233.292701] Modules linked in: vboxnetadp vboxnetflt vboxdrv binfmt_misc 
kvm_intel kvm xfrm_user xfrm4_tunnel tunnel4 ipcomp xfrm_ipcomp esp4 ah4 
deflate zlib_deflate ctr twofish twofish_common camellia serpent blowfish cast5 
des_generic xcbc rmd160 sha1_generic crypto_null af_key snd_hda_codec_via 
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm 
snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq 
snd_timer snd_seq_device ppdev ftdi_sio joydev tpm_tis tpm usbserial parport_pc 
asus_atk0110 snd tpm_bios xpad led_class ff_memless soundcore snd_page_alloc lp 
parport sha256_generic cryptd aes_x86_64 aes_generic dm_crypt raid10 raid456 
async_pq async_xor xor async_memcpy async_raid6_recov raid6_pq async_tx raid1 
raid0 multipath linear fbcon tileblit font bitblit softcursor vga16fb vgastate 
usbhid hid i915 drm_kms_helper drm i2c_algo_bit ahci video output intel_agp 
e1000e
[  233.292788] Pid: 44, comm: khubd Not tainted 2.6.32-24-generic #39-Ubuntu 
System Product Name
[  233.292791] RIP: 0010:[]  [] 
tty_ldisc_reinit+0x50/0x60
[  233.292801] RSP: 0018:880222663a90  EFLAGS: 00010202
[  233.292804] RAX: ffea RBX: 880209b23000 RCX: 0002
[  233.292807] RDX: 0002 RSI: 81a1ca80 RDI: 00e0
[  233.292810] RBP: 880222663aa0 R08: 0001ce53 R09: 00883a08
[  233.292813] R10: 00866bb5 R11:  R12: 00e0
[  233.292816] R13: 880209b23020 R14:  R15: 0001
[  233.292820] FS:  () GS:88002830() 
knlGS:
[  233.292823] CS:  0010 DS: 0018 ES: 0018 CR0: 8005003b
[  233.292826] CR2: 7f620ca3b000 CR3: 0001f08d5000 CR4: 26e0
[  233.292829] DR0:  DR1:  DR2: 
[  233.292832] DR3:  DR6: 0ff0 DR7: 0400
[  233.292835] Process khubd (pid: 44, threadinfo 880222662000, task 
8802226596f0)
[  233.292838] Stack:
[  233.292839]  880209b23000  880222663ad0 
81333f50
[  233.292844] <0> 8801e0e90480 880209b23208 880209b23000 
880209b231d8
[  233.292850] <0> 880222663b30 8132b9c6 880209b23208 
810397a9
[  233.292855] Call Trace:
[  233.292860]  [] tty_ldisc_hangup+0x1c0/0x1f0
[  233.292866]  [] do_tty_hangup+0x146/0x400
[  233.292872]  [] ? default_spin_lock_flags+0x9/0x10
[  233.292877]  [] tty_vhangup+0x15/0x20
[  233.292885]  [] usb_serial_disconnect+0xad/0x1a0 
[usbserial]
[  233.292891]  [] usb_unbind_interface+0x124/0x170
[  233.292898]  [] __device_release_driver+0x6f/0xe0
[  233.292902]  [] device_release_driver+0x2d/0x40
[  233.292906]  [] bus_remove_device+0x9a/0xc0
[  233.292911]  [] device_del+0x127/0x1d0
[  233.292915]  [] usb_disable_device+0xa8/0x130
[  233.292920]  [] usb_disconnect+0xd2/0x170
[  233.292925]  [] hub_port_connect_change+0x8f/0x980
[  233.292930]  [] ? printk+0x41/0x44
[  233.292934]  [] hub_events+0x3b2/0x5a0
[  233.292938]  [] ? thread_return+0x48/0x418
[  233.292943]  [] hub_thread+0x55/0x190
[  233.292948]  [] ? autoremove_wake_function+0x0/0x40
[  233.292953]  [] ? hub_thread+0x0/0x190
[  233.292957]  [] kthread+0x96/0xa0
[  233.292961]  [] child_rip+0xa/0x20
[  233.292965]  [] ? kthread+0x0/0xa0
[  233.292969]  [] ? child_rip+0x0/0x20
[  233.292971] Code: c7 43 40 00 00 00 00 44 89 e7 e8 7c fe ff ff 48 3d 00 f0 
ff ff 77 14 48 89 43 40 44 89 e6 48 89 df e8 15 fa ff ff 5b 41 5c c9 c3 <0f> 0b 
eb fe 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 
[  233.293015] RIP  [] tty_ldisc_reinit+0x50/0x60
[  233.293020]  RSP 
[  233.293024] ---[ end trace 97c726107f759b8b ]---


** Changed in: linux-backports-modules-2.6.31 (Ubuntu)
   Status: New => Confirmed

-- 
 kernel BUG at /build/buildd/linux-2.6.32/drivers/char/tty_ldisc.c:707!
https://bugs.launchpad.net/bugs/613700
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[Bug 566788] Re: /dev/shm isn't writable, causing problems with glibc 2.2+ apps such as chromium

2010-07-03 Thread Simon Schubert 
Is there anything we can help to fix this bug?  What are the temporary
fix options?

-- 
/dev/shm isn't writable, causing problems with glibc 2.2+ apps such as chromium
https://bugs.launchpad.net/bugs/566788
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[Bug 518653] Re: libopie exports conflicting symbols

2010-02-08 Thread Simon Schubert 

** Patch added: "fix: rename all internal md5_* functions to opiemd5_*"
   
http://launchpadlibrarian.net/38889077/opie_2.40%7Edfsg-0ubuntu2_md5_names.diff

-- 
libopie exports conflicting symbols
https://bugs.launchpad.net/bugs/518653
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[Bug 518653] [NEW] libopie exports conflicting symbols

2010-02-07 Thread Simon Schubert 
Public bug reported:

libopie.a exports the functions md5_init, md5_append and md5_finish.
These are quite common names that should be avoided by a central
library.  The problem arises when any binary that also uses these symbol
names is linked to libopie.a, especially when this happens indirectly.

Concretely, I ran into a problem when trying to use dovecot with libpam-
opie.  pam_opie.so contains (part of) libopie.a, and thus also the
global functions md5_init, etc.  Dovecot contains md5_init, md5_update
and md5_finish as global functions.  Note that libopie and dovecot
differ in md5_append vs md5_update, yet share the other function names.

As a result, pam_opie.so will use part dovecot functions (per standard
plt resolution), and part its own (since md5_append is not defined my
dovecot).  That results in an invalid md5 calculation and thus in failed
authentication.

Possible solution:
libopie.a should not export such common names, and instead prefix them 
appropriately.  Alternatively use hidden visibility if applicable.


Description:Ubuntu 9.10
Release:9.10

libopie-dev:
  Installed: 2.40~dfsg-0ubuntu1
  Candidate: 2.40~dfsg-0ubuntu1
  Version table:
 *** 2.40~dfsg-0ubuntu1 0
500 http://ch.archive.ubuntu.com karmic/main Packages
100 /var/lib/dpkg/status
libpam-opie:
  Installed: 0.21-8build2
  Candidate: 0.21-8build2
  Version table:
 *** 0.21-8build2 0
500 http://ch.archive.ubuntu.com karmic/main Packages
100 /var/lib/dpkg/status

** Affects: opie (Ubuntu)
 Importance: Undecided
 Status: New

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libopie exports conflicting symbols
https://bugs.launchpad.net/bugs/518653
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