Ubuntu-4.6.0-5.6 configuration has CONFIG_GOLDFISH and CONFIG_GOLDFISH_BUS enabled, breaking serial support on normal systems

[Michael Marley]

When CONFIG_GOLDFISH_BUS is set to "y", the goldfish_pdev_bus driver is compiled into the kernel and claims the serial UART, breaking serial communications with the following kernel message: "genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus)" repeated several times on boot.

I checked the configs for 4.4 in Yakkety and Xenial and 4.5 in mainline and found that CONFIG_GOLDFISH was set to "n" there, completely disabling all the goldfish drivers. Since this is a driver for the Android emulator, I'm not even sure it is appropriate to be enabled at all for desktop systems, but the goldfish_pdev_bus driver breaking serial definitely shouldn't happen.

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1580960

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Andy Whitcroft (apw)]

We seem to have CONFIG_GOLDFISH{_BUS} turned on which is reported to
break serial on standard systems. Also CONFIG_GOLDFISH is actually
enabled but CONFIG_X86_GOLDFISH is not, even though it is supposed
to be a dependancy of it:

  config GOLDFISH
       def_bool y
       depends on X86_GOLDFISH

Our current situation is essentially illegal and should be being
corrected by the config updater but it is not?

[Andy Whitcroft (apw)]

Turned this off in unstable and pushed for the next upload.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.8.0-11.12

---------------
linux (4.8.0-11.12) yakkety; urgency=low

  * change_hat is logging failures during expected hat probing (LP: #1615893)
    - SAUCE: apparmor: Fix auditing behavior for change_hat probing

  * deleted files outside of the namespace are not being treated as
    disconnected
    (LP: #1615892)
    - SAUCE: apparmor: deleted dentries can be disconnected

  * stacking to unconfined in a child namespace confuses mediation
    (LP: #1615890)
    - SAUCE: apparmor: special case unconfined when determining the mode

  * apparmor module parameters can be changed after the policy is locked
    (LP: #1615895)
    - SAUCE: apparmor: fix: parameters can be changed after policy is locked

  * AppArmor profile reloading causes an intermittent kernel BUG (LP:
    #1579135)
    - SAUCE: apparmor: fix vec_unique for vectors larger than 8

  * label vec reductions can result in reference labels instead of direct
    access
    to labels (LP: #1615889)
    - SAUCE: apparmor: reduction of vec to single entry is just that entry

  * profiles from different namespaces can block other namespaces from being
    able to load a profile (LP: #1615887)
    - SAUCE: apparmor: profiles in one ns can affect mediation in another ns

  * The label build for onexec when stacking is wrong (LP: #1615881)
    - SAUCE: apparmor: Fix label build for onexec stacking.

  * The inherit check for new to old label comparison for domain transitions
    is
    wrong (LP: #1615880)
    - SAUCE: apparmor: Fix new to old label comparison for domain transitions

  * warning stack trace while playing with apparmor namespaces (LP: #1593874)
    - SAUCE: apparmor: fix stack trace when removing namespace with profiles

  * __label_update proxy comparison test is wrong (LP: #1615878)
    - SAUCE: apparmor: Fix __label_update proxy comparison test

  * reading /sys/kernel/security/apparmor/profiles requires CAP_MAC_ADMIN
    (LP: #1560583)
    - SAUCE: apparmor: Allow ns_root processes to open profiles file
    - SAUCE: apparmor: Consult sysctl when reading profiles in a user ns

  * policy namespace stacking (LP: #1379535)
    - SAUCE: (no-up) apparmor: rebase of apparmor3.5-beta1 snapshot for 4.8
    - SAUCE: add a sysctl to enable unprivileged user ns AppArmor policy loading

  * Miscellaneous Ubuntu changes
    - [Debian] Dynamically determine linux udebs package name
    - [Debian] d-i -- fix dtb handling in new kernel-wedge form
    - SAUCE: apparmor: Fix FTBFS due to bad include path
    - SAUCE: apparmor: add data query support
    - [Config] Set CONFIG_SECURITY_APPARMOR_UNCONFINED_INIT=y

  * Miscellaneous upstream changes
    - fixup backout policy view capable for forward port
    - apparmor: fix: Rework the iter loop for label_update
    - apparmor: add more assertions for updates/merges to help catch errors
    - apparmor: Make pivot root transitions work with stacking
    - apparmor: convert delegating deleted files to mediate deleted files
    - apparmor: add missing parens. not a bug fix but highly recommended
    - apparmor: add a stack_version file to allow detection of bug fixes
    - apparmor: push path looku...