Public bug reported:
[Impact]
UBSAN complains shift-out-of-bounds:
[ 13.875276] UBSAN: shift-out-of-bounds in drivers/edac/skx_common.c:369:16
[ 13.875279] shift exponent -66 is negative
[Fix]
Skip the absent memory controllers so ~0 won't be used.
[Test]
Boot system with patch applied, no more UBSAN error in dmesg.
[Where problems could occur]
The fix itself is trivial, however the dependency patches may bring
behavioural changes as new platform support is also added.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-6.1 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: Won't Fix
** Affects: linux-oem-6.1 (Ubuntu Jammy)
Importance: Low
Status: Confirmed
** Affects: linux (Ubuntu Lunar)
Importance: Low
Status: Confirmed
** Affects: linux-oem-6.1 (Ubuntu Lunar)
Importance: Undecided
Status: Invalid
** Tags: oem-priority originate-from-1990358 somerville
** Also affects: linux (Ubuntu Lunar)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Jammy)
Status: New => Won't Fix
** Changed in: linux (Ubuntu Lunar)
Status: New => Confirmed
** Also affects: linux-oem-6.1 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux-oem-6.1 (Ubuntu)
Status: New => Invalid
** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Status: New => Confirmed
** Changed in: linux-oem-6.1 (Ubuntu Lunar)
Status: New => Invalid
** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Importance: Undecided => Low
** Changed in: linux (Ubuntu Lunar)
Importance: Undecided => Low
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https://bugs.launchpad.net/bugs/2028746
Title:
Fix UBSAN in Intel EDAC driver
Status in HWE Next:
New
Status in linux package in Ubuntu:
New
Status in linux-oem-6.1 package in Ubuntu:
Invalid
Status in linux source package in Jammy:
Won't Fix
Status in linux-oem-6.1 source package in Jammy:
Confirmed
Status in linux source package in Lunar:
Confirmed
Status in linux-oem-6.1 source package in Lunar:
Invalid
Bug description:
[Impact]
UBSAN complains shift-out-of-bounds:
[ 13.875276] UBSAN: shift-out-of-bounds in drivers/edac/skx_common.c:369:16
[ 13.875279] shift exponent -66 is negative
[Fix]
Skip the absent memory controllers so ~0 won't be used.
[Test]
Boot system with patch applied, no more UBSAN error in dmesg.
[Where problems could occur]
The fix itself is trivial, however the dependency patches may bring
behavioural changes as new platform support is also added.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/2028746/+subscriptions
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