From: Nathan Chancellor <nathan@kernel.org> stable inclusion from stable-v6.6.100 commit 6ba89b382be4f7265f5b7f0d6175e8cd946aef61 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICVKOJ Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit 1ed171a3afe81531b3ace96bd151a372dda3ee25 upstream. After a recent change in clang to strengthen uninitialized warnings [1], it points out that in one of the error paths in parse_btf_arg(), params is used uninitialized: kernel/trace/trace_probe.c:660:19: warning: variable 'params' is uninitialized when used here [-Wuninitialized] 660 | return PTR_ERR(params); | ^~~~~~ Match many other NO_BTF_ENTRY error cases and return -ENOENT, clearing up the warning. Link: https://lore.kernel.org/all/20250715-trace_probe-fix-const-uninit-warning-v1... Cc: stable@vger.kernel.org Closes: https://github.com/ClangBuiltLinux/linux/issues/2110 Fixes: d157d7694460 ("tracing/probes: Support BTF field access from $retval") Link: https://github.com/llvm/llvm-project/commit/2464313eef01c5b1edf0eccf57a32cde... [1] Signed-off-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Luo Gengkun <luogengkun2@huawei.com> --- kernel/trace/trace_probe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 3a7fbe1da879..1500c5c060b1 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -659,7 +659,7 @@ static int parse_btf_arg(char *varname, ret = query_btf_context(ctx); if (ret < 0 || ctx->nr_params == 0) { trace_probe_log_err(ctx->offset, NO_BTF_ENTRY); - return PTR_ERR(params); + return -ENOENT; } } params = ctx->params; -- 2.34.1