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Diffstat (limited to 'tools/bootconfig')
-rw-r--r--tools/bootconfig/main.c30
1 files changed, 26 insertions, 4 deletions
diff --git a/tools/bootconfig/main.c b/tools/bootconfig/main.c
index 52eb2bbe8966..a0733cbb3c49 100644
--- a/tools/bootconfig/main.c
+++ b/tools/bootconfig/main.c
@@ -337,6 +337,7 @@ static int delete_xbc(const char *path)
static int apply_xbc(const char *path, const char *xbc_path)
{
+ struct stat stat;
u32 size, csum;
char *buf, *data;
int ret, fd;
@@ -394,16 +395,26 @@ static int apply_xbc(const char *path, const char *xbc_path)
return ret;
}
/* TODO: Ensure the @path is initramfs/initrd image */
+ if (fstat(fd, &stat) < 0) {
+ pr_err("Failed to get the size of %s\n", path);
+ goto out;
+ }
ret = write(fd, data, size + 8);
- if (ret < 0) {
+ if (ret < size + 8) {
+ if (ret < 0)
+ ret = -errno;
pr_err("Failed to apply a boot config: %d\n", ret);
- goto out;
+ if (ret < 0)
+ goto out;
+ goto out_rollback;
}
/* Write a magic word of the bootconfig */
ret = write(fd, BOOTCONFIG_MAGIC, BOOTCONFIG_MAGIC_LEN);
- if (ret < 0) {
+ if (ret < BOOTCONFIG_MAGIC_LEN) {
+ if (ret < 0)
+ ret = -errno;
pr_err("Failed to apply a boot config magic: %d\n", ret);
- goto out;
+ goto out_rollback;
}
ret = 0;
out:
@@ -411,6 +422,17 @@ out:
free(data);
return ret;
+
+out_rollback:
+ /* Map the partial write to -ENOSPC */
+ if (ret >= 0)
+ ret = -ENOSPC;
+ if (ftruncate(fd, stat.st_size) < 0) {
+ ret = -errno;
+ pr_err("Failed to rollback the write error: %d\n", ret);
+ pr_err("The initrd %s may be corrupted. Recommend to rebuild.\n", path);
+ }
+ goto out;
}
static int usage(void)