Re: [PATCH 5.15 000/136] 5.15.64-rc1 review

Sudip Mukherjee
2022-08-29T20:12:14Z

Hi Greg,

On Mon, Aug 29, 2022 at 12:00 PM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 5.15.64 release.
> There are 136 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 31 Aug 2022 10:57:37 +0000.
> Anything received after that time might be too late.

My builds are still running, but just an initial report for gcc-12. (I
know v5.15.y still does not build completely with gcc-12).

x86_64 and arm64 allmodconfig build fails with gcc-12, with the error:

drivers/acpi/thermal.c: In function 'acpi_thermal_resume':
drivers/acpi/thermal.c:1101:21: error: the comparison will always
evaluate as 'true' for the address of 'active' will never be NULL
[-Werror=address]
1101 | if (!(&tz->trips.active[i]))
| ^
drivers/acpi/thermal.c:151:36: note: 'active' declared here
151 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];

Will need e5b5d25444e9 ("ACPI: thermal: drop an always true check").

powerpc allmodconfig fails with gcc-12, the error is:

In function 'memcmp',
inlined from 'bacmp' at ./include/net/bluetooth/bluetooth.h:278:9,
inlined from 'l2cap_global_chan_by_psm' at
net/bluetooth/l2cap_core.c:2003:15:
./include/linux/fortify-string.h:19:33: error: '__builtin_memcmp'
specified bound 6 exceeds source size 0 [-Werror=stringop-overread]
19 | #define __underlying_memcmp __builtin_memcmp
| ^
./include/linux/fortify-string.h:235:16: note: in expansion of macro
'__underlying_memcmp'
235 | return __underlying_memcmp(p, q, size);
| ^~~~~~~~~~~~~~~~~~~
In function 'memcmp',
inlined from 'bacmp' at ./include/net/bluetooth/bluetooth.h:278:9,
inlined from 'l2cap_global_chan_by_psm' at
net/bluetooth/l2cap_core.c:2004:15:
./include/linux/fortify-string.h:19:33: error: '__builtin_memcmp'
specified bound 6 exceeds source size 0 [-Werror=stringop-overread]
19 | #define __underlying_memcmp __builtin_memcmp
| ^
./include/linux/fortify-string.h:235:16: note: in expansion of macro
'__underlying_memcmp'
235 | return __underlying_memcmp(p, q, size);
| ^~~~~~~~~~~~~~~~~~~

Introduced in v5.15.61 due to 2711bedab26c ("Bluetooth: L2CAP: Fix
l2cap_global_chan_by_psm regression").
But v5.19.y and mainline does not show the build failure as they also
have 41b7a347bf14 ("powerpc: Book3S 64-bit outline-only KASAN
support").

--
Regards
Sudip