Date: Sun, 24 May 2026 01:37:18 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 295537] linuxulator: O_PATH file descriptors return wrong errno for mmap(2) and f*xattr(2) Message-ID: <bug-295537-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295537 Bug ID: 295537 Summary: linuxulator: O_PATH file descriptors return wrong errno for mmap(2) and f*xattr(2) Product: Base System Version: 15.1-STABLE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: mr.yaoxin@outlook.com The Linuxulator currently returns incorrect error codes when some file-descriptor based operations are attempted on an O_PATH descriptor. In particular, LTP open13 expects these operations to fail with EBADF, matching Linux behavior, but FreeBSD currently returns different errors: - mmap() on an O_PATH fd returns EACCES - fgetxattr() on an O_PATH fd returns EOPNOTSUPP The same issue also affects other fd-based xattr operations, which should follow the same O_PATH semantics for consistency: - fsetxattr() - fremovexattr() - flistxattr() This appears to be a Linux compatibility bug rather than a functional limitation. For mmap(), the Linuxulator does not currently reject path_fileops descriptors early with EBADF. For xattr operations, the code reaches the extattr path and returns the underlying FreeBSD error instead of recognizing that an O_PATH fd is not a valid data-access descriptor for these operations. This is addressed by https://github.com/freebsd/freebsd-src/pull/2181 -- You are receiving this mail because: You are the assignee for the bug.home | help
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