NULL Pointer Dereference The advisory has been revoked - it doesn't affect any version of package kernel-cross-headers (opens in a new tab)
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Start learning- Snyk IDSNYK-RHEL8-KERNELCROSSHEADERS-10272909
- published30 May 2025
- disclosed1 May 2025
Introduced: 1 May 2025
CVE-2022-49925 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:8.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-cross-headers package and not the kernel-cross-headers package as distributed by RHEL.
In the Linux kernel, the following vulnerability has been resolved:
RDMA/core: Fix null-ptr-deref in ib_core_cleanup()
KASAN reported a null-ptr-deref error:
KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f] CPU: 1 PID: 379 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:destroy_workqueue+0x2f/0x740 RSP: 0018:ffff888016137df8 EFLAGS: 00000202 ... Call Trace: ib_core_cleanup+0xa/0xa1 [ib_core] __do_sys_delete_module.constprop.0+0x34f/0x5b0 do_syscall_64+0x3a/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa1a0d221b7 ...
It is because the fail of roce_gid_mgmt_init() is ignored:
ib_core_init() roce_gid_mgmt_init() gid_cache_wq = alloc_ordered_workqueue # fail ... ib_core_cleanup() roce_gid_mgmt_cleanup() destroy_workqueue(gid_cache_wq) # destroy an unallocated wq
Fix this by catching the fail of roce_gid_mgmt_init() in ib_core_init().
References
- https://access.redhat.com/security/cve/CVE-2022-49925
- https://git.kernel.org/stable/c/07c0d131cc0fe1f3981a42958fc52d573d303d89
- https://git.kernel.org/stable/c/6b3d5dcb12347f3518308c2c9d2cf72453a3e1e5
- https://git.kernel.org/stable/c/ab817f75e5e0fa58d9be0825da6a7b7d8a1fa1d9
- https://git.kernel.org/stable/c/af8fb5a0600e9ae29950e9422a032c3c22649ee5
- https://git.kernel.org/stable/c/d360e875c011a005628525bf290322058927e7dc