systemd/SOURCES/0087-dissect-fix-fsck.patch
2023-05-09 08:51:23 +00:00

72 lines
3.0 KiB
Diff

From 7f0f2caa082e7490c160b2c992a094116474a95f Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 4 Nov 2022 18:26:42 +0100
Subject: [PATCH] dissect: fix fsck
Since f7725647bb41c3398a867f139efe526efe8aa1b3 when dissecting a disk
image we operate with fds to the device nodes in question wherever we
can. This includes when we fork off fsck, where we pass a /proc/self/fd/
path as argument. This only works if we keep that fd open however and
disable O_CLOEXEC on the fd. Hence do so, and fix fsck this way.
(Without this, all fsck will fail, since the fd path is invalid)
(cherry picked from commit f8ab781223bcb0330ee4499b879a62e84fee313e)
Related: #2138081
---
src/shared/dissect-image.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/src/shared/dissect-image.c b/src/shared/dissect-image.c
index 6a991c877a..7676636723 100644
--- a/src/shared/dissect-image.c
+++ b/src/shared/dissect-image.c
@@ -1309,11 +1309,11 @@ static int is_loop_device(const char *path) {
return true;
}
-static int run_fsck(const char *node, const char *fstype) {
+static int run_fsck(int node_fd, const char *fstype) {
int r, exit_status;
pid_t pid;
- assert(node);
+ assert(node_fd >= 0);
assert(fstype);
r = fsck_exists_for_fstype(fstype);
@@ -1322,16 +1322,20 @@ static int run_fsck(const char *node, const char *fstype) {
return 0;
}
if (r == 0) {
- log_debug("Not checking partition %s, as fsck for %s does not exist.", node, fstype);
+ log_debug("Not checking partition %s, as fsck for %s does not exist.", FORMAT_PROC_FD_PATH(node_fd), fstype);
return 0;
}
- r = safe_fork("(fsck)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_RLIMIT_NOFILE_SAFE|FORK_DEATHSIG|FORK_NULL_STDIO, &pid);
+ r = safe_fork_full(
+ "(fsck)",
+ &node_fd, 1, /* Leave the node fd open */
+ FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_RLIMIT_NOFILE_SAFE|FORK_DEATHSIG|FORK_NULL_STDIO|FORK_CLOEXEC_OFF,
+ &pid);
if (r < 0)
return log_debug_errno(r, "Failed to fork off fsck: %m");
if (r == 0) {
/* Child */
- execl("/sbin/fsck", "/sbin/fsck", "-aT", node, NULL);
+ execl("/sbin/fsck", "/sbin/fsck", "-aT", FORMAT_PROC_FD_PATH(node_fd), NULL);
log_open();
log_debug_errno(errno, "Failed to execl() fsck: %m");
_exit(FSCK_OPERATIONAL_ERROR);
@@ -1421,7 +1425,7 @@ static int mount_partition(
rw = m->rw && !(flags & DISSECT_IMAGE_MOUNT_READ_ONLY);
if (FLAGS_SET(flags, DISSECT_IMAGE_FSCK) && rw) {
- r = run_fsck(node, fstype);
+ r = run_fsck(m->mount_node_fd, fstype);
if (r < 0)
return r;
}