As a reminder, the file
http://www.draisberghof.de/usb_modeswitch/usb-modeswitch-versions.xml
can be monitored for updates; it has download link and md5 value.
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I have released upstream version 2.6.1 which includes the fixes for
recently reported problems.
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Title:
usb_modeswitch_dispatcher crashed with SI
Thank you, I've tested the fix and it mostly works. However, a minor
fixup is needed for flawless switching of this particular modem, see
https://www.draisberghof.de/usb_modeswitch/bb/viewtopic.php?f=2&t=2915#p19606
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FTR, uploaded 2.6.0-3 to Debian/unstable with the patch mentionned by
@digidietze.
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Title:
usb_modeswitch_dispatcher crashed with SIGSEGV in strr
I've made an attempt to fix the problem of interfaces missing in the
original Tcl wrapper. I intend to release 2.6.1 soon.
If anybody wants to test, the files are here:
https://www.draisberghof.de/usb_modeswitch/bb/viewtopic.php?p=19605#p19605
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@Jakub, the change you proposed while fixing the segfault is creating
issues for other users as description there
https://bugs.launchpad.net/ubuntu/+source/usb-
modeswitch/+bug/1866926/comments/8
is that something you would be interesting in trying to resolve?
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This bug was fixed in the package usb-modeswitch -
2.5.2+repack0-2ubuntu2
---
usb-modeswitch (2.5.2+repack0-2ubuntu2) focal; urgency=medium
* debian/patches/dispatcher-c-rewrite.patch: fix SIGSEGV occuring when
device has no usb interface 0 and serialization of a NULL pointer
Thanks Jakub for the debugging work you put there and the fixes! I've
upload now those changes to the current 'focal' Ubuntu serie (tweaking a
bit the packaging, I merged the fixes in the patch doing the rewrite in
C rather than stacking patches)
Some notes/questions
- the fixes look like they wo
** Changed in: usb-modeswitch (Ubuntu)
Status: Confirmed => Fix Committed
** Changed in: usb-modeswitch (Ubuntu)
Importance: Medium => High
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The two patches inside the debdiff fix these bugs:
* First issue is that usb_modeswitch_dispatcher.c crashes when a device
presented to it has no USB interface 0. This is caused by improper
checking for a NULL pointer returned by a interface-lookup function. It
is fixed by adding a null-check and
This is a debdiff for Bionic applicable to usb-
modeswitch_2.5.2+repack0-2ubuntu1. I built this in pbuilder and it
builds successfully, and I installed it, the patch works as intended.
** Patch added: "debdiff against usb-modeswitch_2.5.2+repack0-2ubuntu1"
https://bugs.launchpad.net/ubuntu/+s
** Patch removed: "debian patch against usb-modeswitch_2.5.2+repack0-2ubuntu1"
https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/1676763/+attachment/5316289/+files/bionic.patch
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** Information type changed from Public Security to Public
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Title:
usb_modeswitch_dispatcher crashed with SIGSEGV in strrchr()
To manage notific
The attachment "debian patch against usb-
modeswitch_2.5.2+repack0-2ubuntu1" seems to be a debdiff. The ubuntu-
sponsors team has been subscribed to the bug report so that they can
review and hopefully sponsor the debdiff. If the attachment isn't a
patch, please remove the "patch" flag from the a
The patch for bionic should be applicable to focal as well (current
development branch; currently reading
https://wiki.ubuntu.com/StableReleaseUpdates ).
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I am sorry for uploading the patches multiple times, I wanted them to be
clean (i.e. patches ending with .patch, having consistent directory
versions, etc)
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** Patch added: "debian patch against usb-modeswitch_2.2.5+repack0-1ubuntu1"
https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/1676763/+attachment/5316290/+files/xenial.patch
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** Patch removed: "debian patch against usb-modeswitch_2.5.2+repack0-2ubuntu1"
https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/1676763/+attachment/5316287/+files/bionic.patch
** Patch added: "debian patch against usb-modeswitch_2.5.2+repack0-2ubuntu1"
https://bugs.launchpad.n
** Patch removed: "debian patch against usb-modeswitch_2.5.2+repack0-2ubuntu1"
https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/1676763/+attachment/5316282/+files/bionic.patch
** Patch added: "debian patch against usb-modeswitch_2.5.2+repack0-2ubuntu1"
https://bugs.launchpad.n
** Patch added: "debian patch against usb-modeswitch_2.2.5+repack0-1ubuntu1"
https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/1676763/+attachment/5316288/+files/xenial.patch
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I'm sending patch for Xenial.
** Patch added: "debian patch against usb-modeswitch_2.2.5+repack0-1ubuntu1"
https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/1676763/+attachment/5316286/+files/xenial.patch
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Thanks!
I have attached a patch for the Bionic release.
** Patch added: "debian patch against usb-modeswitch_2.5.2+repack0-2ubuntu1"
https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/1676763/+attachment/5316282/+files/bionic.patch
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Thanks for the thorough analysis!
I will check your patches and apply them upstream accordingly. It's
amazing what device engineers come up with to make life more
"interesting" ...
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https
I have realized that these are two different issues.
1) Ubuntu's version of usb_modeswitch_dispatcher crashes when there is no
interface 0.
2) All versions exit prematurely (non-Ubuntu versions exit gracefully) and do
not switch the device.
Therefore I'd include a fix only for (1) - to make the
Upstream bugreport:
http://www.draisberghof.de/usb_modeswitch/bb/viewtopic.php?f=2&t=2915
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Title:
usb_modeswitch_dispatcher crashed with SIGSEGV
I have tried installing the package from Buster. That has resolved the
crash - the program ended gracefully. However the underlying problem is
still there - devices without interface 0 will not work. I think this is
present in upstream as well.
USB_ModeSwitch log from Wed Dec 25 16:35:30 CET 2019
EDIT: the null-pointer bug only exists in Ubuntu, the interface error
bug may exist in upstream as well.
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Title:
usb_modeswitch_dispatcher crashe
Hmmm, it seems that this bug exists *only* in Ubuntu and not in Debian.
Ubuntu source package contains a patch that rewrites the
usb_modeswitch_dispatcher program from Tcl to C. While there must have
been good reasons to do this, there is at least one more bug in the
rewritten version.
On line 422
I think that upgrading the modem firmware (I have Sierra Wireless
EM7305) might help, but that does not fix the underlying bug / broken
assumptions.
** Tags added: bionic
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Ah, it starts to make sense. usb_modeswitch_dispatcher is called
correctly, but it cannot find interface 0 on the device to be switched.
However, dmesg contains warning about the same thing:
[2.369824] usb 1-11: new high-speed USB device number 5 using xhci_hcd
[2.520482] usb 1-11: config
Very similar crash happens to me on Bionic as well. So far it seems to
me that usb_modeswitch_dispatcher is called incorrectly and therefore it
crashes when it eventually encounters a NULL pointer.
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** Information type changed from Private to Public Security
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Title:
usb_modeswitch_dispatcher crashed with SIGSEGV in strrchr()
To manage notifi
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