SUSE: CVE-2024-38539: SUSE Linux Security Advisory

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

RDMA/cma: Fix kmemleak in rdma_core observed during blktests nvme/rdma use siw

When running blktests nvme/rdma, the following kmemleak issue will appear.

kmemleak: Kernel memory leak detector initialized (mempool available:36041)
kmemleak: Automatic memory scanning thread started
kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
kmemleak: 8 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
kmemleak: 17 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
kmemleak: 4 new suspected memory leaks (see /sys/kernel/debug/kmemleak)

unreferenced object 0xffff88855da53400 (size 192):
comm "rdma", pid 10630, jiffies 4296575922
hex dump (first 32 bytes):
37 00 00 00 00 00 00 00 c0 ff ff ff 1f 00 00 00 7...............
10 34 a5 5d 85 88 ff ff 10 34 a5 5d 85 88 ff ff .4.].....4.]....
backtrace (crc 47f66721):
[] kmalloc_trace+0x30d/0x3b0
[] alloc_gid_entry+0x47/0x380 [ib_core]
[] add_modify_gid+0x166/0x930 [ib_core]
[] ib_cache_update.part.0+0x6d8/0x910 [ib_core]
[] ib_cache_setup_one+0x24a/0x350 [ib_core]
[] ib_register_device+0x9e/0x3a0 [ib_core]
[] 0xffffffffc2a3d389
[] nldev_newlink+0x2b8/0x520 [ib_core]
[] rdma_nl_rcv_msg+0x2c3/0x520 [ib_core]
[]
rdma_nl_rcv_skb.constprop.0.isra.0+0x23c/0x3a0 [ib_core]
[] netlink_unicast+0x445/0x710
[] netlink_sendmsg+0x761/0xc40
[] __sys_sendto+0x3a9/0x420
[] __x64_sys_sendto+0xdc/0x1b0
[] do_syscall_64+0x93/0x180
[] entry_SYSCALL_64_after_hwframe+0x71/0x79

The root cause: rdma_put_gid_attr is not called when sgid_attr is set
to ERR_PTR(-ENODEV).