CVE-2024-38539

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> RDMA/cma: Fix kmemleak in rdma_core observed during blktests nvme/rdma use siw<br /> <br /> When running blktests nvme/rdma, the following kmemleak issue will appear.<br /> <br /> kmemleak: Kernel memory leak detector initialized (mempool available:36041)<br /> kmemleak: Automatic memory scanning thread started<br /> kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak)<br /> kmemleak: 8 new suspected memory leaks (see /sys/kernel/debug/kmemleak)<br /> kmemleak: 17 new suspected memory leaks (see /sys/kernel/debug/kmemleak)<br /> kmemleak: 4 new suspected memory leaks (see /sys/kernel/debug/kmemleak)<br /> <br /> unreferenced object 0xffff88855da53400 (size 192):<br /> comm "rdma", pid 10630, jiffies 4296575922<br /> hex dump (first 32 bytes):<br /> 37 00 00 00 00 00 00 00 c0 ff ff ff 1f 00 00 00 7...............<br /> 10 34 a5 5d 85 88 ff ff 10 34 a5 5d 85 88 ff ff .4.].....4.]....<br /> backtrace (crc 47f66721):<br /> [] kmalloc_trace+0x30d/0x3b0<br /> [] alloc_gid_entry+0x47/0x380 [ib_core]<br /> [] add_modify_gid+0x166/0x930 [ib_core]<br /> [] ib_cache_update.part.0+0x6d8/0x910 [ib_core]<br /> [] ib_cache_setup_one+0x24a/0x350 [ib_core]<br /> [] ib_register_device+0x9e/0x3a0 [ib_core]<br /> [] 0xffffffffc2a3d389<br /> [] nldev_newlink+0x2b8/0x520 [ib_core]<br /> [] rdma_nl_rcv_msg+0x2c3/0x520 [ib_core]<br /> []<br /> rdma_nl_rcv_skb.constprop.0.isra.0+0x23c/0x3a0 [ib_core]<br /> [] netlink_unicast+0x445/0x710<br /> [] netlink_sendmsg+0x761/0xc40<br /> [] __sys_sendto+0x3a9/0x420<br /> [] __x64_sys_sendto+0xdc/0x1b0<br /> [] do_syscall_64+0x93/0x180<br /> [] entry_SYSCALL_64_after_hwframe+0x71/0x79<br /> <br /> The root cause: rdma_put_gid_attr is not called when sgid_attr is set<br /> to ERR_PTR(-ENODEV).