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A FIFO passed the stat() that preceded the fopen(), which then waited for a writer inside libc where the backend could not be cancelled. Take the checks from the open descriptor, opened O_NONBLOCK so that it returns.
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| Metric | Results |
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| Complexity | 9 |
| Duplication | 0 |
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📝 WalkthroughWalkthroughAPI-key loading now uses a nonblocking, close-on-exec file descriptor. It validates regular-file status, enforces size limits, handles interrupted reads, rejects embedded null bytes, trims whitespace, and clears temporary data. Regression tests cover invalid file types, empty and whitespace-only files, oversized files, null bytes, timeouts, and regular-file validation. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Actionable comments posted: 1
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Inline comments:
In `@src/provider_common.c`:
- Around line 203-206: Update the EINTR handling in the read loop to call
CHECK_FOR_INTERRUPTS() before retrying read(). Route any error raised during
interrupt processing through cleanup that closes fd and clears buf, then
preserve the existing retry behavior when no error occurs.
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src/provider_common.ctest/t/008_api_key_file_not_regular.pl
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Whatever starts the server sets HOME, so a value pointing elsewhere read a key file the server was never meant to open and sent it to the provider. getpwuid(geteuid()) answers from the passwd database instead.
read() returning EINTR was retried without CHECK_FOR_INTERRUPTS(), so a cancellation was deferred for as long as the reads kept being interrupted. OpenTransientFile() releases the descriptor on abort.
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Reviewed: correctness, security, error-handling, and test coverage all check out. CodeRabbit's one finding (missing CHECK_FOR_INTERRUPTS() before EINTR retry) was fixed in-PR.
008 and 009 were taken by the API key file tests merged in PR #70, which branched from the same commit as this one.
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A leading ~ was expanded with getenv("HOME"), which whatever starts the server decides, so a value pointing elsewhere read a key file the server was never meant to open and sent it to the provider. getpwuid(geteuid()) answers from the passwd database instead.
read() returning EINTR was retried without CHECK_FOR_INTERRUPTS(), so a cancellation was deferred for as long as the reads kept being interrupted. The descriptor comes from OpenTransientFile() now, so that it is released on abort.
Both the file type check and the getpwuid() change were claimed in the changelog under 1.1-beta1 without having shipped.
New TAP tests: 008 for the file types (FIFO, directory, character device, empty, whitespace only, oversized, embedded null), 009 for ~ expansion with HOME planted elsewhere.
Fixes #66
Fixes #67