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120 lines
6.1 KiB
120 lines
6.1 KiB
From 38d81fc89f325801922971229a894038fe207eae Mon Sep 17 00:00:00 2001
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From: Yu Watanabe <watanabe.yu+github@gmail.com>
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Date: Wed, 24 May 2023 07:04:06 +0900
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Subject: [PATCH] fstab-generator: refuse invalid mount point path in fstab
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earlier
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(cherry picked from commit 6742eca13497dd9dd548ba3e2ced2588d82720ac)
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Related: #2190226
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---
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src/fstab-generator/fstab-generator.c | 68 +++++++++++++--------------
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1 file changed, 34 insertions(+), 34 deletions(-)
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diff --git a/src/fstab-generator/fstab-generator.c b/src/fstab-generator/fstab-generator.c
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index 2cd4de29f0..bd1508bc30 100644
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--- a/src/fstab-generator/fstab-generator.c
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+++ b/src/fstab-generator/fstab-generator.c
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@@ -689,7 +689,7 @@ static int parse_fstab_one(
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int passno,
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bool initrd) {
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- _cleanup_free_ char *what = NULL, *where = NULL, *canonical_where = NULL;
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+ _cleanup_free_ char *what = NULL, *where = NULL;
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MountPointFlags flags;
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bool is_swap;
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int r;
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@@ -725,50 +725,50 @@ static int parse_fstab_one(
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assert(where_original); /* 'where' is not necessary for swap entry. */
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- where = strdup(where_original);
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- if (!where)
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- return log_oom();
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-
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- if (is_path(where)) {
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- path_simplify(where);
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+ if (!is_path(where_original)) {
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+ log_warning("Mount point %s is not a valid path, ignoring.", where);
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+ return 0;
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+ }
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- /* Follow symlinks here; see 5261ba901845c084de5a8fd06500ed09bfb0bd80 which makes sense for
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- * mount units, but causes problems since it historically worked to have symlinks in e.g.
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- * /etc/fstab. So we canonicalize here. Note that we use CHASE_NONEXISTENT to handle the case
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- * where a symlink refers to another mount target; this works assuming the sub-mountpoint
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- * target is the final directory.
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- *
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- * FIXME: when chase() learns to chase non-existent paths, use this here and
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- * drop the prefixing with /sysroot on error below.
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- */
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- r = chase_symlinks(where, initrd ? "/sysroot" : NULL, CHASE_PREFIX_ROOT | CHASE_NONEXISTENT,
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- &canonical_where, NULL);
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- if (r < 0) {
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- /* If we can't canonicalize, continue as if it wasn't a symlink */
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- log_debug_errno(r, "Failed to read symlink target for %s, using as-is: %m", where);
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-
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- if (initrd) {
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- canonical_where = path_join("/sysroot", where);
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- if (!canonical_where)
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- return log_oom();
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- }
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+ /* Follow symlinks here; see 5261ba901845c084de5a8fd06500ed09bfb0bd80 which makes sense for
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+ * mount units, but causes problems since it historically worked to have symlinks in e.g.
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+ * /etc/fstab. So we canonicalize here. Note that we use CHASE_NONEXISTENT to handle the case
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+ * where a symlink refers to another mount target; this works assuming the sub-mountpoint
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+ * target is the final directory.
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+ *
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+ * FIXME: when chase() learns to chase non-existent paths, use this here and
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+ * drop the prefixing with /sysroot on error below.
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+ */
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+ r = chase_symlinks(where_original, initrd ? "/sysroot" : NULL, CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, &where, NULL);
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+ if (r < 0) {
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+ /* If we can't canonicalize, continue as if it wasn't a symlink */
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+ log_debug_errno(r, "Failed to read symlink target for %s, using as-is: %m", where_original);
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- } else if (streq(canonical_where, where)) /* If it was fully canonicalized, suppress the change */
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- canonical_where = mfree(canonical_where);
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+ if (initrd)
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+ where = path_join("/sysroot", where_original);
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else
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- log_debug("Canonicalized what=%s where=%s to %s", what, where, canonical_where);
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+ where = strdup(where_original);
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+ if (!where)
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+ return log_oom();
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+
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+ path_simplify(where);
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}
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+ if (streq(where, where_original)) /* If it was fully canonicalized, suppress the change */
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+ where = mfree(where);
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+ else
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+ log_debug("Canonicalized what=%s where=%s to %s", what, where_original, where);
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+
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log_debug("Found entry what=%s where=%s type=%s makefs=%s growfs=%s noauto=%s nofail=%s",
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what, where, strna(fstype),
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yes_no(flags & MOUNT_MAKEFS), yes_no(flags & MOUNT_GROWFS),
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yes_no(flags & MOUNT_NOAUTO), yes_no(flags & MOUNT_NOFAIL));
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- bool is_sysroot = in_initrd() && path_equal(where, "/sysroot");
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+ bool is_sysroot = in_initrd() && path_equal(where ?: where_original, "/sysroot");
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/* See comment from add_sysroot_usr_mount() about the need for extra indirection in case /usr needs
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* to be mounted in order for the root fs to be synthesized based on configuration included in /usr/,
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* e.g. systemd-repart. */
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- bool is_sysroot_usr = in_initrd() && path_equal(where, "/sysroot/usr");
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+ bool is_sysroot_usr = in_initrd() && path_equal(where ?: where_original, "/sysroot/usr");
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const char *target_unit =
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initrd ? SPECIAL_INITRD_FS_TARGET :
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@@ -786,8 +786,8 @@ static int parse_fstab_one(
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r = add_mount(source,
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arg_dest,
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what,
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- is_sysroot_usr ? "/sysusr/usr" : canonical_where ?: where,
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- !is_sysroot_usr && canonical_where ? where : NULL,
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+ is_sysroot_usr ? "/sysusr/usr" : where ?: where_original,
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+ !is_sysroot_usr && where ? where_original : NULL,
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fstype,
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options,
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passno,
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