APPLIED: [SRU] [Bionic] [PATCH 0/1] Fix unbootable kernel inside VMs

[Khaled Elmously]

On 2019-07-09 19:11:33 , Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1829378
> 
> [Impact]
> NULL pointer dereference in acpi_quirk_matches_bios_ids() renders kernel
> unbootable.
> 
> [Fix]
> It's a regression caused by commit abd273f52766 ("UBUNTU: SAUCE: ACPI /
> bus: Add some Lenovo laptops in list of acpi table term list").
> 
> When both bios_vendor and bios_ver are NULL then a NULL string is passed
> to strncmp() and the issue occurs.
> 
> VMs may not provides string bios_vendor or bios_ver, so bail out early
> when either bios_vendor or bios_ver is NULL.
> 
> [Test]
> User reported the test kernel with proposed fix solves the issue.
> 
> [Regression Potenial]
> Low. It's quite trivial so I don't think it'll regress anything.
> 
> Kai-Heng Feng (1):
>   UBUNTU: SAUCE: ACPI / bus: Fix NULL pointer dereference in
>     acpi_quirk_matches_bios_ids()
> 
>  drivers/acpi/bus.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> -- 
> 2.17.1
> 
> 
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