文件操作 - psi-read
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文件: /snap/snapd/28254/usr/lib/snapd/apparmor.d/abstractions/psi-read
编辑文件内容
abi <abi/5.0>, # Pressure Stall Information interface (read-only) # Writing to these files to set up polling creates kernel objects and # could be an exploit stepping-stone, so only allow reads here @{PROC}/pressure/{cpu,memory,io} r, include if exists <abstractions/psi-read.d>
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