Fail early if argc <= 0 or argv[0] is NULL #92
Closed
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Under musl optind will be 1 if getopt is called with argc == 0. Under glibc it is not quite clear what will happen and I haven't tested it. In either case, this triggers a bug where argv ends up pointing at envp and argc is set to -1 which has further unclear implications on the execution of the program. By failing early, these issues can be safely avoided. fputs and exit are used instead of errx as errx does not have the information necessary to print a meaningful program name.
It calls |
|
@ericonr no. setprogname is handled by libopenbsd and err* are all provided by libc (as bsd extensions). (I first tested this patch with errx and it definitely didn't work which is why I changed to using fputs.) |
|
Thanks, merged this into a new branch for the last release and tagged a release https://github.com/Duncaen/OpenDoas/releases/tag/v6.8.2. |
|
I'm closing this since it has been merged in a way which github doesn't appear to understand. |
Fr1tzBot
added a commit
to Fr1tzBot/OpenDoas
that referenced
this pull request
Aug 27, 2024
Fix for empty argv handling. This release adds a patch[0] from PR[1] to aborting early if argv is not set or empty. Nothing else has changed in this patch release. [0]: Duncaen@7f0205f [1]: Duncaen#92 # -----BEGIN PGP SIGNATURE----- # # iQIzBAABCgAdFiEExLb7qYIR9+/zXetzM1wdF+w9bjUFAmHxcmAACgkQM1wdF+w9 # bjXdZxAArPzkuPrw1/79d+jq8JGbDYYaOYkYcaa+W9+09E6wfCMRNhIwL68v9G9Y # yPgb0+ZOwqnDsaRX8GsKS417aSKyBwTWruUsdlS1y7bilphqmrw1LaulYjEZd7w3 # GZH/xI+6aBb5F25ZUIGsvPxMnq37AH7E29XHQ463qI1n2jO++8Ucu+EuUd/H7BAn # sgmzdbLPuvtkio//kwZ0b7crtI4EGXsGn4h0mcE9ETd6gf9HCstOY8N3ntDQXtOG # LECfAk+IKW6sGzoKwZLGNvi6zU9Dgllcq3avPa2UxqgAw4R85KD49JJHHyOFbC5k # ZdnmkJypBoK+GnEjw38YOZE+TRumtI4MHn7tRPcQHQ8VahGkjIRedZsmmT7Qfld3 # QWKJKfPWGEhAQ83rka9lXHrhQddWKplwRwt4U4R6eytzAhDdf9HGXUSILBdAUxfJ # wH9yvfqt5E/Ky7fLI8AajCp7MUEPtGiSm+tsWmsjLV/6hxTbS9l3QpoBcC9hLyG3 # Kfq6uMX1x0nKtKPPJYtNUT7zcNfDSEGfY2KAXFe2rVhhXlXeFe9trNgVMVtSXUV2 # 2fSdKBXH2JmQKkMAWEMhgJb+wr5sJHz73l//KEbxEHlwH+JwETpE1JGkamI/NN+p # 0W0vc786ZH+irampES2/3HX2QfbqWQ8kuDDAS8t+E8ePxZFPZkU= # =4mWZ # -----END PGP SIGNATURE-----
# for free
to join this conversation on GitHub.
Already have an account?
# to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Under musl optind will be 1 if getopt is called with argc == 0.
Under glibc it is not quite clear what will happen and I haven't tested
it.
In either case, this triggers a bug where argv ends up pointing at
envp and argc is set to -1 which has further unclear implications on the
execution of the program.
By failing early, these issues can be safely avoided.
fputs and exit are used instead of errx as errx does not have the
information necessary to print a meaningful program name.