I see the same on a test system, and i think this is a false positive. When you check the code, there is a variable length arrary declared at the end of a struct with [0]. Apparently the UBSAN checker keys of the number, and the way to avoid the warning would be to change that to []. But this would be no functional change, just a syntax change to silence the checker.
Regards, Christof Schmitt On Tue, 2025-03-18 at 15:04 +0000, Jonathan Buzzard wrote: Got my Ubuntu 24.04 server up and running and it "appears" to be working. Thanks to everyone a Lenovo for helping me get access to the download. However I am see some troubling messages on the console like this [Tue Mar 18 11:21:10 2025] UBSAN: array-index-out-of-bounds in /usr/lpp/mmfs/src/gpl-linux/acl.c:314:45 [Tue Mar 18 11:21:10 2025] index 1 is out of range for type 'linux_posix_acl_entry [*]' Where index might be any of 0, 1 or 2. That to my eye doesn't look good. Is this expected or should I raise this a support issue? JAB.
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