Date: Sun, 15 Oct 2017 18:53:21 +0000 (UTC) From: Tijl Coosemans <tijl@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r324635 - head/sys/kern Message-ID: <201710151853.v9FIrLqR064063@repo.freebsd.org>
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Author: tijl Date: Sun Oct 15 18:53:21 2017 New Revision: 324635 URL: https://svnweb.freebsd.org/changeset/base/324635 Log: When a Linux program tries to access a /path the kernel tries /compat/linux/path before /path. Stop following symbolic links when looking up /compat/linux/path so dead symbolic links aren't ignored. This allows syscalls like readlink(2) and lstat(2) to work on such links. And open(2) will return an error now instead of trying /path. Modified: head/sys/kern/vfs_lookup.c Modified: head/sys/kern/vfs_lookup.c ============================================================================== --- head/sys/kern/vfs_lookup.c Sun Oct 15 16:19:09 2017 (r324634) +++ head/sys/kern/vfs_lookup.c Sun Oct 15 18:53:21 2017 (r324635) @@ -1390,13 +1390,13 @@ kern_alternate_path(struct thread *td, const char *pre for (cp = &ptr[len] - 1; *cp != '/'; cp--); *cp = '\0'; - NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, buf, td); + NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, buf, td); error = namei(&nd); *cp = '/'; if (error != 0) goto keeporig; } else { - NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, buf, td); + NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, buf, td); error = namei(&nd); if (error != 0)
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