| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2023-52977: net: openvswitch: fix flow memory leak in ovs_flow_cmd_new |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: openvswitch: fix flow memory leak in ovs_flow_cmd_new |
| |
| Syzkaller reports a memory leak of new_flow in ovs_flow_cmd_new() as it is |
| not freed when an allocation of a key fails. |
| |
| BUG: memory leak |
| unreferenced object 0xffff888116668000 (size 632): |
| comm "syz-executor231", pid 1090, jiffies 4294844701 (age 18.871s) |
| hex dump (first 32 bytes): |
| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ |
| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ |
| backtrace: |
| [<00000000defa3494>] kmem_cache_zalloc include/linux/slab.h:654 [inline] |
| [<00000000defa3494>] ovs_flow_alloc+0x19/0x180 net/openvswitch/flow_table.c:77 |
| [<00000000c67d8873>] ovs_flow_cmd_new+0x1de/0xd40 net/openvswitch/datapath.c:957 |
| [<0000000010a539a8>] genl_family_rcv_msg_doit+0x22d/0x330 net/netlink/genetlink.c:739 |
| [<00000000dff3302d>] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] |
| [<00000000dff3302d>] genl_rcv_msg+0x328/0x590 net/netlink/genetlink.c:800 |
| [<000000000286dd87>] netlink_rcv_skb+0x153/0x430 net/netlink/af_netlink.c:2515 |
| [<0000000061fed410>] genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 |
| [<000000009dc0f111>] netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] |
| [<000000009dc0f111>] netlink_unicast+0x545/0x7f0 net/netlink/af_netlink.c:1339 |
| [<000000004a5ee816>] netlink_sendmsg+0x8e7/0xde0 net/netlink/af_netlink.c:1934 |
| [<00000000482b476f>] sock_sendmsg_nosec net/socket.c:651 [inline] |
| [<00000000482b476f>] sock_sendmsg+0x152/0x190 net/socket.c:671 |
| [<00000000698574ba>] ____sys_sendmsg+0x70a/0x870 net/socket.c:2356 |
| [<00000000d28d9e11>] ___sys_sendmsg+0xf3/0x170 net/socket.c:2410 |
| [<0000000083ba9120>] __sys_sendmsg+0xe5/0x1b0 net/socket.c:2439 |
| [<00000000c00628f8>] do_syscall_64+0x30/0x40 arch/x86/entry/common.c:46 |
| [<000000004abfdcf4>] entry_SYSCALL_64_after_hwframe+0x61/0xc6 |
| |
| To fix this the patch rearranges the goto labels to reflect the order of |
| object allocations and adds appropriate goto statements on the error |
| paths. |
| |
| Found by Linux Verification Center (linuxtesting.org) with Syzkaller. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52977 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.14.303 with commit 655e873bf528f0f46ce6b069f9a2daee9621197c and fixed in 4.14.306 with commit 1ac653cf886cdfc082708c82dc6ac6115cebd2ee |
| Issue introduced in 4.19.270 with commit ee27d70556a47c3a07e65a60f47e3ea12a255af8 and fixed in 4.19.273 with commit af4e720bc00a2653f7b9df21755b9978b3d7f386 |
| Issue introduced in 5.4.229 with commit 8b74211bf60b3e0c0ed4fe3d16c92ffdcaaf34eb and fixed in 5.4.232 with commit ed6c5e8caf55778500202775167e8ccdb1a030cb |
| Issue introduced in 5.10.163 with commit 6736b61ecf230dd656464de0f514bdeadb384f20 and fixed in 5.10.168 with commit 70154489f531587996f3e9d7cceeee65cff0001d |
| Issue introduced in 5.15.86 with commit 0133615a06007684df648feb9d327714e399afd4 and fixed in 5.15.93 with commit f423c2efd51d7eb1d143c2be7eea233241d9bbbf |
| Issue introduced in 6.1.2 with commit 32d5fa5bdccec2361fc6c4ed05a7367155b3a1e9 and fixed in 6.1.11 with commit 70d40674a549d498bd63d5432acf46205da1534b |
| Issue introduced in 4.9.337 with commit 4f592e712ea2132f511d545954867d7880df5be2 |
| Issue introduced in 6.0.16 with commit a991a411c3e21ef22507400dbb179ae02029d42c |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2023-52977 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/openvswitch/datapath.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/1ac653cf886cdfc082708c82dc6ac6115cebd2ee |
| https://git.kernel.org/stable/c/af4e720bc00a2653f7b9df21755b9978b3d7f386 |
| https://git.kernel.org/stable/c/ed6c5e8caf55778500202775167e8ccdb1a030cb |
| https://git.kernel.org/stable/c/70154489f531587996f3e9d7cceeee65cff0001d |
| https://git.kernel.org/stable/c/f423c2efd51d7eb1d143c2be7eea233241d9bbbf |
| https://git.kernel.org/stable/c/70d40674a549d498bd63d5432acf46205da1534b |
| https://git.kernel.org/stable/c/0c598aed445eb45b0ee7ba405f7ece99ee349c30 |
