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src: check size of args before using for exec_path #45902

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nodejs-github-bot merged 1 commit into from
Dec 20, 2022
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src: check size of args before using for exec_path #45902

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src: check size of args before using for exec_path 
If we are in an artifically created Environment that has no args set,
and uv_exepath returns an error (for instance, if /proc is not mounted
on a Linux system), then we crash with a nullptr deref attempting to
use argv[0].

Fixes: #45901
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@awilfox
awilfox committed Dec 18, 2022
commit c218f7a1b4efb1283cedb1572cd482386ca02edd
2 changes: 1 addition & 1 deletion src/env.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -619,7 +619,7 @@ std::string GetExecPath(const std::vector<std::string>& argv) {
std::string exec_path;
if (uv_exepath(exec_path_buf, &exec_path_len) == 0) {
exec_path = std::string(exec_path_buf, exec_path_len);
} else {
} else if (argv.size() > 0) {
exec_path = argv[0];
}

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