File paths?
File paths?
Posted Jun 4, 2018 21:41 UTC (Mon) by Cyberax (✭ supporter ✭, #52523)In reply to: File paths? by wahern
Parent article: Deferring seccomp decisions to user space
No, there's no race condition. The kernel code would have to copy strings into the message sent to the userspace helper.
The helper code then can do all the required open/access/stat stuff and return the results as a file descriptor (open) or a static block of data (stat/access).
Obviously, copying the parameters will add some overhead, but it should be way less than doing additional ptrace/read_mem calls from the userspace helper.
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