Public bug reported: [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] 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. ** Affects: linux-oem-6.14 (Ubuntu) Importance: Undecided Status: New ** Affects: linux-oem-6.14 (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: linux-oem-6.14 (Ubuntu Noble) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2119713 Title: UBSAN: shift-out-of-bounds in drivers/edac/skx_common.c:452:16 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-oem-6.14/+bug/2119713/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
