libbpf: increase probe_name buffer size to avoid format-truncation #5977
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This patch increases the size of the `probe_name` buffer in `probe_kern_syscall_wrapper()` from `MAX_EVENT_NAME_LEN` to `MAX_EVENT_NAME_LEN * 2`. The change addresses a build failure in perf builds caused by GCC's -Werror=format-truncation warning: libbpf.c:11052:45: error: '%s' directive output may be truncated writing up to 63 bytes into a region of size between 34 and 53 [-Werror=format-truncation] The warning is triggered by a `snprintf()` call that formats a string using syscall names and other identifiers. In some cases, the buffer size is insufficient, leading to potential truncation. Debug builds pass because they do not treat warnings as errors, but perf builds fail due to `-Werror`. Increasing the buffer size ensures that the formatted string fits safely, resolving the issue without affecting functionality. Signed-off-by: Sanjay Chitroda <[email protected]>
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=1003347 expired. Closing PR. |
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Pull request for series with
subject: libbpf: increase probe_name buffer size to avoid format-truncation
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1003347