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sd-device: protect more properties often set by kernel and internally used by udevd

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This commit is contained in:
Yu Watanabe 2025-03-06 03:26:04 +09:00
parent a4cb6c41a1
commit 1707b41e76
1 changed files with 15 additions and 2 deletions

17
src/libsystemd/sd-device/device-util.h

@ -110,6 +110,19 @@ bool device_is_devtype(sd_device *device, const char *devtype);
static inline bool device_property_can_set(const char *property) {
return property &&
!STR_IN_SET(property,
"ACTION", "DEVLINKS", "DEVNAME", "DEVPATH", "DEVTYPE", "DRIVER",
"IFINDEX", "MAJOR", "MINOR", "SEQNUM", "SUBSYSTEM", "TAGS");
/* basic properties set by kernel, only in netlink event */
"ACTION", "SEQNUM", "SYNTH_UUID",
/* basic properties set by kernel, both in netlink event and uevent file */
"DEVPATH", "DEVPATH_OLD", "SUBSYSTEM", "DEVTYPE", "DRIVER", "MODALIAS",
/* device node */
"DEVNAME", "DEVMODE", "DEVUID", "DEVGID", "MAJOR", "MINOR",
/* block device */
"DISKSEQ", "PARTN",
/* network interface (INTERFACE_OLD is set by udevd) */
"IFINDEX", "INTERFACE", "INTERFACE_OLD",
/* basic properties set by udevd */
"DEVLINKS", "TAGS", "CURRENT_TAGS", "USEC_INITIALIZED", "UDEV_DATABASE_VERSION") &&
/* Similar to SYNTH_UUID, but set based on KEY=VALUE arguments passed by userspace.
* See kernel's f36776fafbaa0094390dd4e7e3e29805e0b82730 (v4.13) */
!startswith(property, "SYNTH_ARG_");
}