In the Linux kernel, the following vulnerability has been resolved:

ubifs: Fix memory leak in ubifs_sysfs_init()

When insmod ubifs.ko, a kmemleak reported as below:

unreferenced object 0xffff88817fb1a780 (size 8):
comm "insmod", pid 25265, jiffies 4295239702 (age 100.130s)
hex dump (first 8 bytes):
75 62 69 66 73 00 ff ff ubifs...
backtrace:
[] slab_post_alloc_hook+0x9c/0x3c0
[] __kmalloc_track_caller+0x183/0x410
[] kstrdup+0x3a/0x80
[] kstrdup_const+0x66/0x80
[] kvasprintf_const+0x155/0x190
[] kobject_set_name_vargs+0x5b/0x150
[] kobject_set_name+0xbb/0xf0
[] do_one_initcall+0x14c/0x5a0
[] do_init_module+0x1f0/0x660
[] load_module+0x6d7e/0x7590
[] __do_sys_finit_module+0x19f/0x230
[] __x64_sys_finit_module+0x73/0xb0
[] do_syscall_64+0x35/0x80
[] entry_SYSCALL_64_after_hwframe+0x63/0xcd

When kset_register() failed, we should call kset_put to cleanup it.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-53278
• https://git.kernel.org/stable/c/1c5fdf2d4647219d2267ccb08c7f2c7095bf3450
• https://git.kernel.org/stable/c/203a55f04f66eea1a1ca7e5a302a7f5c99c62327
• https://git.kernel.org/stable/c/d42c2b18c42da7378e67b6414aafe93b65de89d1