Hi, The udev* function may return NULL,and it will be dereferenced in str* and sscanf func. For example, there is a coredump caused in add func, which show in be7a043(commit id) in upstream-queue. We check the return value to avoid dereference NULL. repo: openSUSE/multipath-tools repo link: https://github.com/openSUSE/multipath-tools branch: upstream-queue lixiaokeng (6): libmultipath: check uedv* return value in sysfs_get_host_pci_name libmultipath: check udev* return value in ccw_sysfs_pathinfo libmultipath: check udev* return value in sysfs_get_tgt_nodename libmultipath: check udev* return value in trigger_partitions_udev_change libmultipath: check udev* renturn value in get_ctrl_blkdev libmultipath: check udev* return value in _find_path_by_syspath libmultipath/configure.c | 4 +++- libmultipath/discovery.c | 9 +++++++-- libmultipath/foreign/nvme.c | 10 +++++++--- 3 files changed, 17 insertions(+), 6 deletions(-) -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
