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xz: Add a comment to Capsicum sandbox setup.

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This comment is repeated in xzdec.c to help remind us why all the
capabilities are removed from stdin in certain situations.
This commit is contained in:
Jia Tan 2023-12-21 16:39:53 +08:00
parent 8191720eac
commit 9e96ca8c48
1 changed files with 1 additions and 0 deletions
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src/xz/file_io.c
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@ -199,6 +199,7 @@ io_sandbox_enter(int src_fd)
CAP_EVENT, CAP_FCNTL, CAP_LOOKUP, CAP_READ, CAP_SEEK))) CAP_EVENT, CAP_FCNTL, CAP_LOOKUP, CAP_READ, CAP_SEEK)))
goto error; goto error;
// If not reading from stdin, remove all capabilities from it.
if (src_fd != STDIN_FILENO && cap_rights_limit( if (src_fd != STDIN_FILENO && cap_rights_limit(
STDIN_FILENO, cap_rights_clear(&rights))) STDIN_FILENO, cap_rights_clear(&rights)))
goto error; goto error;