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mountfsd: add recognizable error if we pass an fd with unexpected flags

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This commit is contained in:
Lennart Poettering
2025-08-19 21:06:48 +02:00
parent 9fe168a92c
commit 86fd19af14
2 changed files with 8 additions and 1 deletions
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2
src/mountfsd/mountwork.c
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@@ -771,6 +771,8 @@ static int vl_method_mount_directory(
return log_debug_errno(r, "Failed to get client UID: %m");
DirectoryOwnership owned_by = validate_directory_fd(directory_fd, peer_uid);
if (owned_by == -EREMOTEIO)
return sd_varlink_errorbo(link, "io.systemd.MountFileSystem.BadFileDescriptorFlags", SD_JSON_BUILD_PAIR_STRING("parameter", "directoryFileDescriptor"));
if (owned_by < 0)
return owned_by;

7
src/shared/varlink-io.systemd.MountFileSystem.c
View File

@@ -115,6 +115,9 @@ static SD_VARLINK_DEFINE_ERROR(RootPartitionNotFound);
static SD_VARLINK_DEFINE_ERROR(DeniedByImagePolicy);
static SD_VARLINK_DEFINE_ERROR(KeyNotFound);
static SD_VARLINK_DEFINE_ERROR(VerityFailure);
static SD_VARLINK_DEFINE_ERROR(BadFileDescriptorFlags,
SD_VARLINK_FIELD_COMMENT("Name of the parameter referencing the file descriptor with one or more bad flag."),
SD_VARLINK_DEFINE_FIELD(parameter, SD_VARLINK_STRING, 0));
SD_VARLINK_DEFINE_INTERFACE(
io_systemd_MountFileSystem,
@@ -143,4 +146,6 @@ SD_VARLINK_DEFINE_INTERFACE(
SD_VARLINK_SYMBOL_COMMENT("The authentication key for this image is not available."),
&vl_error_KeyNotFound,
SD_VARLINK_SYMBOL_COMMENT("Verity could not be set up."),
&vl_error_VerityFailure);
&vl_error_VerityFailure,
SD_VARLINK_SYMBOL_COMMENT("A passed file descriptor has unexpected/forbidden flags set."),
&vl_error_BadFileDescriptorFlags);