Pass "%s" to i386_dis_printf as the format string
The patch modifies the x86 disassembler to pass "%s" as the format string to `i386_dis_printf` to prevent format string vulnerabilities.
This patch updates the x86 disassembler code to pass "%s" as the format string to the i386_dis_printf function. This change is intended to prevent potential format string vulnerabilities. The patch also includes testsuite updates with new tests (comments.d, comments.s, comments-intel.d) to ensure the proper generation of disassembly comments.
In Details
This patch addresses a potential format string vulnerability in the x86 disassembler's i386_dis_printf function. The disassembler translates machine code to assembly, and i386_dis_printf is used for output. By explicitly providing "%s" as the format string, the code avoids interpreting parts of the input as format specifiers, mitigating potential security risks. The testsuite updates add new test cases (comments.d, comments.s, comments-intel.d) to verify the correct generation of disassembly comments and ensure the fix is effective.
For Context
This patch addresses a security issue in a tool that translates machine code (the binary instructions computers execute) into human-readable assembly code. This tool is called a disassembler. The vulnerability stems from a function (i386_dis_printf) that formats output strings. If the format string isn't carefully controlled, it could allow attackers to inject malicious code. This patch ensures the format string is fixed, preventing such attacks. New tests are also added to verify the fix.