** Changed in: linux-oem-6.14 (Ubuntu Noble)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/2119713
Title:
UBSAN: shift-out-of-bounds in drivers/edac/skx_common.c:452:16
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-6.14 package in Ubuntu:
Invalid
Status in linux source package in Noble:
Fix Committed
Status in linux-oem-6.14 source package in Noble:
Fix Committed
Status in linux source package in Plucky:
In Progress
Status in linux-oem-6.14 source package in Plucky:
Invalid
Status in linux source package in Questing:
In Progress
Status in linux-oem-6.14 source package in Questing:
Invalid
Bug description:
[Impact]
Shows the following UBSAN warning messages in dmesg
Jul 21 08:37:25 localhost kernel: UBSAN: shift-out-of-bounds in
/build/linux-oem-6.14-44jeWy/linux-oem-6.14-6.14.0/drivers/edac/skx_common.c:452:16
Jul 21 08:37:25 localhost kernel: shift exponent -66 is negative
Jul 21 08:37:25 localhost kernel: CPU: 79 UID: 0 PID: 2454 Comm:
(udev-worker) Not tainted 6.14.0-1006-oem #6-Ubuntu
Jul 21 08:37:25 localhost kernel: Hardware name: Dell Inc. Dell Pro Max Tower
T6 FCT6260/, BIOS 0.9.39 07/09/2025
Jul 21 08:37:25 localhost kernel: Call Trace:
Jul 21 08:37:25 localhost kernel: <TASK>
Jul 21 08:37:25 localhost kernel: dump_stack_lvl+0x76/0xa0
Jul 21 08:37:25 localhost kernel: dump_stack+0x10/0x20
Jul 21 08:37:25 localhost kernel:
__ubsan_handle_shift_out_of_bounds+0x1a5/0x380
Jul 21 08:37:25 localhost kernel: skx_get_dimm_info.cold+0x2a/0x17f
[skx_edac_common]
Jul 21 08:37:25 localhost kernel: i10nm_get_dimm_config+0x1f9/0x300
[i10nm_edac]
Jul 21 08:37:25 localhost kernel: skx_register_mci+0x139/0x1e0
[skx_edac_common]
Jul 21 08:37:25 localhost kernel: ? __pfx_i10nm_get_dimm_config+0x10/0x10
[i10nm_edac]
Jul 21 08:37:25 localhost kernel: i10nm_init+0x42b/0xff0 [i10nm_edac]
Jul 21 08:37:25 localhost kernel: ? __pfx_i10nm_init+0x10/0x10 [i10nm_edac]
[Fix]
In linux-next
2e6fe1bbefd9 EDAC/i10nm: Skip DIMM enumeration on a disabled memory controller
Intel provides a fix for this issue
https://lore.kernel.org/lkml/[email protected]/
[Test]
Boot up the Intel Granite Rapids and check dmesg log, there should be no
UBSAN shift-out-of-bounds message.
[Where problems could occur]
It adds extra check for edac i10nm driver, the impact should be low.
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