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Message-ID: <2025050238-CVE-2023-53141-e701@gregkh> Date: Fri, 2 May 2025 17:56:46 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2023-53141: ila: do not generate empty messages in ila_xlat_nl_cmd_get_mapping() From: Greg Kroah-Hartman <gregkh@...nel.org> Description =========== In the Linux kernel, the following vulnerability has been resolved: ila: do not generate empty messages in ila_xlat_nl_cmd_get_mapping() ila_xlat_nl_cmd_get_mapping() generates an empty skb, triggerring a recent sanity check [1]. Instead, return an error code, so that user space can get it. [1] skb_assert_len WARNING: CPU: 0 PID: 5923 at include/linux/skbuff.h:2527 skb_assert_len include/linux/skbuff.h:2527 [inline] WARNING: CPU: 0 PID: 5923 at include/linux/skbuff.h:2527 __dev_queue_xmit+0x1bc0/0x3488 net/core/dev.c:4156 Modules linked in: CPU: 0 PID: 5923 Comm: syz-executor269 Not tainted 6.2.0-syzkaller-18300-g2ebd1fbb946d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : skb_assert_len include/linux/skbuff.h:2527 [inline] pc : __dev_queue_xmit+0x1bc0/0x3488 net/core/dev.c:4156 lr : skb_assert_len include/linux/skbuff.h:2527 [inline] lr : __dev_queue_xmit+0x1bc0/0x3488 net/core/dev.c:4156 sp : ffff80001e0d6c40 x29: ffff80001e0d6e60 x28: dfff800000000000 x27: ffff0000c86328c0 x26: dfff800000000000 x25: ffff0000c8632990 x24: ffff0000c8632a00 x23: 0000000000000000 x22: 1fffe000190c6542 x21: ffff0000c8632a10 x20: ffff0000c8632a00 x19: ffff80001856e000 x18: ffff80001e0d5fc0 x17: 0000000000000000 x16: ffff80001235d16c x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001 x11: ff80800008353a30 x10: 0000000000000000 x9 : 21567eaf25bfb600 x8 : 21567eaf25bfb600 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80001e0d6558 x4 : ffff800015c74760 x3 : ffff800008596744 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000000e Call trace: skb_assert_len include/linux/skbuff.h:2527 [inline] __dev_queue_xmit+0x1bc0/0x3488 net/core/dev.c:4156 dev_queue_xmit include/linux/netdevice.h:3033 [inline] __netlink_deliver_tap_skb net/netlink/af_netlink.c:307 [inline] __netlink_deliver_tap+0x45c/0x6f8 net/netlink/af_netlink.c:325 netlink_deliver_tap+0xf4/0x174 net/netlink/af_netlink.c:338 __netlink_sendskb net/netlink/af_netlink.c:1283 [inline] netlink_sendskb+0x6c/0x154 net/netlink/af_netlink.c:1292 netlink_unicast+0x334/0x8d4 net/netlink/af_netlink.c:1380 nlmsg_unicast include/net/netlink.h:1099 [inline] genlmsg_unicast include/net/genetlink.h:433 [inline] genlmsg_reply include/net/genetlink.h:443 [inline] ila_xlat_nl_cmd_get_mapping+0x620/0x7d0 net/ipv6/ila/ila_xlat.c:493 genl_family_rcv_msg_doit net/netlink/genetlink.c:968 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1048 [inline] genl_rcv_msg+0x938/0xc1c net/netlink/genetlink.c:1065 netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2574 genl_rcv+0x38/0x50 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x660/0x8d4 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x800/0xae0 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x558/0x844 net/socket.c:2479 ___sys_sendmsg net/socket.c:2533 [inline] __sys_sendmsg+0x26c/0x33c net/socket.c:2562 __do_sys_sendmsg net/socket.c:2571 [inline] __se_sys_sendmsg net/socket.c:2569 [inline] __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2569 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 irq event stamp: 136484 hardirqs last enabled at (136483): [<ffff800008350244>] __up_console_sem+0x60/0xb4 kernel/printk/printk.c:345 hardirqs last disabled at (136484): [<ffff800012358d60>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (136418): [<ffff800008020ea8>] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (136418): [<ffff800008020ea8>] __do_softirq+0xd4c/0xfa4 kernel/softirq.c:600 softirqs last disabled at (136371): [<ffff80000802b4a4>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]--- skb len=0 headroom=0 headlen=0 tailroom=192 mac=(0,0) net=(0,-1) trans=-1 shinfo(txflags=0 nr_frags=0 gso(size=0 type=0 segs=0)) csum(0x0 ip_summed=0 complete_sw=0 valid=0 level=0) hash(0x0 sw=0 l4=0) proto=0x0010 pkttype=6 iif=0 dev name=nlmon0 feat=0x0000000000005861 The Linux kernel CVE team has assigned CVE-2023-53141 to this issue. Affected and fixed versions =========================== Issue introduced in 4.5 with commit 7f00feaf107645d95a6d87e99b4d141ac0a08efd and fixed in 4.14.310 with commit b26bc5861505f04dea933ca3e522772b20fa086f Issue introduced in 4.5 with commit 7f00feaf107645d95a6d87e99b4d141ac0a08efd and fixed in 4.19.278 with commit c631e52aea0fc8d4deea06e439f5810a8b40ad0f Issue introduced in 4.5 with commit 7f00feaf107645d95a6d87e99b4d141ac0a08efd and fixed in 5.4.237 with commit 783f218940b3c7b872e4111d0145000f26ecbdf6 Issue introduced in 4.5 with commit 7f00feaf107645d95a6d87e99b4d141ac0a08efd and fixed in 5.10.175 with commit 42d9ed4e5dc5f87fbd67c232e2e4a9b88ceeb47f Issue introduced in 4.5 with commit 7f00feaf107645d95a6d87e99b4d141ac0a08efd and fixed in 5.15.103 with commit 91aceb3844d4aec555c7f423f9fd843eff5835e9 Issue introduced in 4.5 with commit 7f00feaf107645d95a6d87e99b4d141ac0a08efd and fixed in 6.1.20 with commit 25b54f247ea060aeb85ec88a82c75060fca03521 Issue introduced in 4.5 with commit 7f00feaf107645d95a6d87e99b4d141ac0a08efd and fixed in 6.2.7 with commit 60fe7cb483c8c5dcadaeeac867251d6e59c7badc Issue introduced in 4.5 with commit 7f00feaf107645d95a6d87e99b4d141ac0a08efd and fixed in 6.3 with commit 693aa2c0d9b6d5b1f2745d31b6e70d09dbbaf06e 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-2023-53141 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/ipv6/ila/ila_xlat.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/b26bc5861505f04dea933ca3e522772b20fa086f https://git.kernel.org/stable/c/c631e52aea0fc8d4deea06e439f5810a8b40ad0f https://git.kernel.org/stable/c/783f218940b3c7b872e4111d0145000f26ecbdf6 https://git.kernel.org/stable/c/42d9ed4e5dc5f87fbd67c232e2e4a9b88ceeb47f https://git.kernel.org/stable/c/91aceb3844d4aec555c7f423f9fd843eff5835e9 https://git.kernel.org/stable/c/25b54f247ea060aeb85ec88a82c75060fca03521 https://git.kernel.org/stable/c/60fe7cb483c8c5dcadaeeac867251d6e59c7badc https://git.kernel.org/stable/c/693aa2c0d9b6d5b1f2745d31b6e70d09dbbaf06e
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