{"id":"CVE-2024-46783","summary":"tcp_bpf: fix return value of tcp_bpf_sendmsg()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp_bpf: fix return value of tcp_bpf_sendmsg()\n\nWhen we cork messages in psock-\u003ecork, the last message triggers the\nflushing will result in sending a sk_msg larger than the current\nmessage size. In this case, in tcp_bpf_send_verdict(), 'copied' becomes\nnegative at least in the following case:\n\n468         case __SK_DROP:\n469         default:\n470                 sk_msg_free_partial(sk, msg, tosend);\n471                 sk_msg_apply_bytes(psock, tosend);\n472                 *copied -= (tosend + delta); // \u003c==== HERE\n473                 return -EACCES;\n\nTherefore, it could lead to the following BUG with a proper value of\n'copied' (thanks to syzbot). We should not use negative 'copied' as a\nreturn value here.\n\n  ------------[ cut here ]------------\n  kernel BUG at net/socket.c:733!\n  Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP\n  Modules linked in:\n  CPU: 0 UID: 0 PID: 3265 Comm: syz-executor510 Not tainted 6.11.0-rc3-syzkaller-00060-gd07b43284ab3 #0\n  Hardware name: linux,dummy-virt (DT)\n  pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n  pc : sock_sendmsg_nosec net/socket.c:733 [inline]\n  pc : sock_sendmsg_nosec net/socket.c:728 [inline]\n  pc : __sock_sendmsg+0x5c/0x60 net/socket.c:745\n  lr : sock_sendmsg_nosec net/socket.c:730 [inline]\n  lr : __sock_sendmsg+0x54/0x60 net/socket.c:745\n  sp : ffff800088ea3b30\n  x29: ffff800088ea3b30 x28: fbf00000062bc900 x27: 0000000000000000\n  x26: ffff800088ea3bc0 x25: ffff800088ea3bc0 x24: 0000000000000000\n  x23: f9f00000048dc000 x22: 0000000000000000 x21: ffff800088ea3d90\n  x20: f9f00000048dc000 x19: ffff800088ea3d90 x18: 0000000000000001\n  x17: 0000000000000000 x16: 0000000000000000 x15: 000000002002ffaf\n  x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000\n  x11: 0000000000000000 x10: ffff8000815849c0 x9 : ffff8000815b49c0\n  x8 : 0000000000000000 x7 : 000000000000003f x6 : 0000000000000000\n  x5 : 00000000000007e0 x4 : fff07ffffd239000 x3 : fbf00000062bc900\n  x2 : 0000000000000000 x1 : 0000000000000000 x0 : 00000000fffffdef\n  Call trace:\n   sock_sendmsg_nosec net/socket.c:733 [inline]\n   __sock_sendmsg+0x5c/0x60 net/socket.c:745\n   ____sys_sendmsg+0x274/0x2ac net/socket.c:2597\n   ___sys_sendmsg+0xac/0x100 net/socket.c:2651\n   __sys_sendmsg+0x84/0xe0 net/socket.c:2680\n   __do_sys_sendmsg net/socket.c:2689 [inline]\n   __se_sys_sendmsg net/socket.c:2687 [inline]\n   __arm64_sys_sendmsg+0x24/0x30 net/socket.c:2687\n   __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]\n   invoke_syscall+0x48/0x110 arch/arm64/kernel/syscall.c:49\n   el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:132\n   do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:151\n   el0_svc+0x34/0xec arch/arm64/kernel/entry-common.c:712\n   el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730\n   el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598\n  Code: f9404463 d63f0060 3108441f 54fffe81 (d4210000)\n  ---[ end trace 0000000000000000 ]---","modified":"2026-04-16T04:36:05.576783153Z","published":"2024-09-18T07:12:39.573Z","related":["SUSE-SU-2024:3551-1","SUSE-SU-2024:3553-1","SUSE-SU-2024:3559-1","SUSE-SU-2024:3561-1","SUSE-SU-2024:3564-1","SUSE-SU-2024:3566-1","SUSE-SU-2024:3569-1","SUSE-SU-2024:3587-1","SUSE-SU-2024:3591-1","SUSE-SU-2024:3592-1","SUSE-SU-2025:20073-1","SUSE-SU-2025:20077-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46783.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/126d72b726c4cf1119f3a7fe413a78d341c3fea9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3efe53eb221a38e207c1e3f81c51e4ca057d50c2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6f9fdf5806cced888c43512bccbdf7fefd50f510"},{"type":"WEB","url":"https://git.kernel.org/stable/c/78bb38d9c5a311c5f8bdef7c9557d7d81ca30e4a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/810a4e7d92dea4074cb04c25758320909d752193"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c8219a27fa43a2cbf99f5176f6dddfe73e7a24ae"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fe1910f9337bd46a9343967b547ccab26b4b2c6e"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46783.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-46783"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4f738adba30a7cfc006f605707e7aee847ffefa0"},{"fixed":"6f9fdf5806cced888c43512bccbdf7fefd50f510"},{"fixed":"3efe53eb221a38e207c1e3f81c51e4ca057d50c2"},{"fixed":"78bb38d9c5a311c5f8bdef7c9557d7d81ca30e4a"},{"fixed":"810a4e7d92dea4074cb04c25758320909d752193"},{"fixed":"c8219a27fa43a2cbf99f5176f6dddfe73e7a24ae"},{"fixed":"126d72b726c4cf1119f3a7fe413a78d341c3fea9"},{"fixed":"fe1910f9337bd46a9343967b547ccab26b4b2c6e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46783.json"}}],"schema_version":"1.7.5"}