On 4/27/24 6:00 AM, Kerin Millar wrote:
Hi,At some point after upgrading to bash-5.3-alpha, the following message appeared in my kernel ring buffer. [700406.870502] bash[3089019]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set Unfortunately, it took me a while to notice the presence of this message. Therefore, I am uncertain as to what bash was being tasked with at the time that it was logged. The inference of the message seems clear, however. The presently running kernel is 6.6.28.
Bash uses memfd_create to create an anonymous file for noexec command
substitution. It's not clear why it would need file sealing, where
available, in this case.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/
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