tcp_bpf: fix return value of tcp_bpf_sendmsg()
In the Linux kernel, the following vulnerability has been resolved: tcp_bpf: fix return value of tcp_bpf_sendmsg() When we cork messages in psock->cork, the last message triggers the flushing will result in sending a sk_msg larger than the current message size. In this case, in tcp_bpf_send_verdict(), 'copied' becomes negative at least in the following case: 468 case __SK_DROP: 469 default: 470 sk_msg_free_partial(sk, msg, tosend); 471 sk_msg_apply_bytes(psock, tosend); 472 *copied -= (tosend + delta); // <==== HERE 473 return -EACCES; Therefore, it could lead to the following BUG with a proper value of 'copied' (thanks to syzbot). We should not use negative 'copied' as a return value here. ------------[ cut here ]------------ kernel BUG at net/socket.c:733! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 UID: 0 PID: 3265 Comm: syz-executor510 Not tainted 6.11.0-rc3-syzkaller-00060-gd07b43284ab3 #0 Hardware name: linux,dummy-virt (DT) pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) pc : sock_sendmsg_nosec net/socket.c:733 [inline] pc : sock_sendmsg_nosec net/socket.c:728 [inline] pc : __sock_sendmsg+0x5c/0x60 net/socket.c:745 lr : sock_sendmsg_nosec net/socket.c:730 [inline] lr : __sock_sendmsg+0x54/0x60 net/socket.c:745 sp : ffff800088ea3b30 x29: ffff800088ea3b30 x28: fbf00000062bc900 x27: 0000000000000000 x26: ffff800088ea3bc0 x25: ffff800088ea3bc0 x24: 0000000000000000 x23: f9f00000048dc000 x22: 0000000000000000 x21:
CVE-2024-46783
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2024-46783
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4f738adba30a7cfc006f605707e7aee847ffefa0",
"lessThan": "6f9fdf5806cced888c43512bccbdf7fefd50f510",
"versionType": "git"
},
{
"status": "affected",
"version": "4f738adba30a7cfc006f605707e7aee847ffefa0",
"lessThan": "3efe53eb221a38e207c1e3f81c51e4ca057d50c2",
"versionType": "git"
},
{
"status": "affected",
"version": "4f738adba30a7cfc006f605707e7aee847ffefa0",
"lessThan": "78bb38d9c5a311c5f8bdef7c9557d7d81ca30e4a",
"versionType": "git"
},
{
"status": "affected",
"version": "4f738adba30a7cfc006f605707e7aee847ffefa0",
"lessThan": "810a4e7d92dea4074cb04c25758320909d752193",
"versionType": "git"
},
{
"status": "affected",
"version": "4f738adba30a7cfc006f605707e7aee847ffefa0",
"lessThan": "c8219a27fa43a2cbf99f5176f6dddfe73e7a24ae",
"versionType": "git"
},
{
"status": "affected",
"version": "4f738adba30a7cfc006f605707e7aee847ffefa0",
"lessThan": "126d72b726c4cf1119f3a7fe413a78d341c3fea9",
"versionType": "git"
},
{
"status": "affected",
"version": "4f738adba30a7cfc006f605707e7aee847ffefa0",
"lessThan": "fe1910f9337bd46a9343967b547ccab26b4b2c6e",
"versionType": "git"
}
],
"programFiles": [
"net/ipv4/tcp_bpf.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.284",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.226",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.167",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.110",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.51",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.10.10",
"versionType": "semver",
"lessThanOrEqual": "6.10.*"
},
{
"status": "unaffected",
"version": "6.11",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv4/tcp_bpf.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-46783
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26719 · Revision 1
- Added to Heist Feed
- Publisher date