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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Hmmm, the Ubuntu version does depend on Tcl. I think a better solution
would be to go with Jim (as Debian does:
https://packages.debian.org/buster/usb-modeswitch) for both Focal and
Groovy.
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I'm starting to feel that trying to fix the C rewrite is futile.
On line 392 of usb_modeswitch_dispatcher.c, the iface variable is
overwritten. Unfortunately the value being assigned is not an interface
number, it is rather a USB class number. Fixing this might help with
some part of this, but it
Hi all,
I'm the one who accidentally introduced the bug when fixing
https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/1676763.
I'm sorry for causing the problem, I will try to find a fix that will
work in both scenarios.
Best regards,
Jakub
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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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https://bugs.launchpad.net/bugs/1676763
Title:
usb_modeswitch_dispatcher crashed with SIGSEGV in strrc
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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https://bu
** 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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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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https://
** 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 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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** 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
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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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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https://bugs.launchpad.net/bugs/1676763
Title:
usb_modeswitch_dispatche
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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https://bugs.launchpad.net/bugs/1676763
Title:
usb_modes
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
*** This bug is a duplicate of bug 1676763 ***
https://bugs.launchpad.net/bugs/1676763
I suspect that this bug is a duplicate of #1676763.
** This bug has been marked a duplicate of bug 1676763
usb_modeswitch_dispatcher crashed with SIGSEGV in strrchr()
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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
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https://bugs.launchpad.net/bugs/1542022
Title:
gvfsd-dav crashed with SIGSEGV in strlen()
Status in gvfs package in Ubu
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