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cvelist/2024/56xxx/CVE-2024-56633.json

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"-Synchronized-Data."
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{
"-Synchronized-Data."
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"data_version": "4.0",
"-Synchronized-Data."
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"data_type": "CVE",
"data_format": "MITRE",
"CVE_data_meta": {
"ID": "CVE-2024-56633",
"-Synchronized-Data."
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"ASSIGNER": "cve@kernel.org",
"STATE": "PUBLIC"
"-Synchronized-Data."
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},
"description": {
"description_data": [
{
"lang": "eng",
"-Synchronized-Data."
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp_bpf: Fix the sk_mem_uncharge logic in tcp_bpf_sendmsg\n\nThe current sk memory accounting logic in __SK_REDIRECT is pre-uncharging\ntosend bytes, which is either msg->sg.size or a smaller value apply_bytes.\n\nPotential problems with this strategy are as follows:\n\n- If the actual sent bytes are smaller than tosend, we need to charge some\n bytes back, as in line 487, which is okay but seems not clean.\n\n- When tosend is set to apply_bytes, as in line 417, and (ret < 0), we may\n miss uncharging (msg->sg.size - apply_bytes) bytes.\n\n[...]\n415 tosend = msg->sg.size;\n416 if (psock->apply_bytes && psock->apply_bytes < tosend)\n417 tosend = psock->apply_bytes;\n[...]\n443 sk_msg_return(sk, msg, tosend);\n444 release_sock(sk);\n446 origsize = msg->sg.size;\n447 ret = tcp_bpf_sendmsg_redir(sk_redir, redir_ingress,\n448 msg, tosend, flags);\n449 sent = origsize - msg->sg.size;\n[...]\n454 lock_sock(sk);\n455 if (unlikely(ret < 0)) {\n456 int free = sk_msg_free_nocharge(sk, msg);\n458 if (!cork)\n459 *copied -= free;\n460 }\n[...]\n487 if (eval == __SK_REDIRECT)\n488 sk_mem_charge(sk, tosend - sent);\n[...]\n\nWhen running the selftest test_txmsg_redir_wait_sndmem with txmsg_apply,\nthe following warning will be reported:\n\n------------[ cut here ]------------\nWARNING: CPU: 6 PID: 57 at net/ipv4/af_inet.c:156 inet_sock_destruct+0x190/0x1a0\nModules linked in:\nCPU: 6 UID: 0 PID: 57 Comm: kworker/6:0 Not tainted 6.12.0-rc1.bm.1-amd64+ #43\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014\nWorkqueue: events sk_psock_destroy\nRIP: 0010:inet_sock_destruct+0x190/0x1a0\nRSP: 0018:ffffad0a8021fe08 EFLAGS: 00010206\nRAX: 0000000000000011 RBX: ffff9aab4475b900 RCX: ffff9aab481a0800\nRDX: 0000000000000303 RSI: 0000000000000011 RDI: ffff9aab4475b900\nRBP: ffff9aab4475b990 R08: 0000000000000000 R09: ffff9aab40050ec0\nR10: 0000000000000000 R11: ffff9aae6fdb1d01 R12: ffff9aab49c60400\nR13: ffff9aab49c60598 R14: ffff9aab49c60598 R15: dead000000000100\nFS: 0000000000000000(0000) GS:ffff9aae6fd80000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007ffec7e47bd8 CR3: 00000001a1a1c004 CR4: 0000000000770ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n<TASK>\n? __warn+0x89/0x130\n? inet_sock_destruct+0x190/0x1a0\n? report_bug+0xfc/0x1e0\n? handle_bug+0x5c/0xa0\n? exc_invalid_op+0x17/0x70\n? asm_exc_invalid_op+0x1a/0x20\n? inet_sock_destruct+0x190/0x1a0\n__sk_destruct+0x25/0x220\nsk_psock_destroy+0x2b2/0x310\nprocess_scheduled_works+0xa3/0x3e0\nworker_thread+0x117/0x240\n? __pfx_worker_thread+0x10/0x10\nkthread+0xcf/0x100\n? __pfx_kthread+0x10/0x10\nret_from_fork+0x31/0x40\n? __pfx_kthread+0x10/0x10\nret_from_fork_asm+0x1a/0x30\n</TASK>\n---[ end trace 0000000000000000 ]---\n\nIn __SK_REDIRECT, a more concise way is delaying the uncharging after sent\nbytes are finalized, and uncharge this value. When (ret < 0), we shall\ninvoke sk_msg_free.\n\nSame thing happens in case __SK_DROP, when tosend is set to apply_bytes,\nwe may miss uncharging (msg->sg.size - apply_bytes) bytes. The same\nwarning will be reported in selftest.\n\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);\n473 return -EACCES;\n[...]\n\nSo instead of sk_msg_free_partial we can do sk_msg_free here."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "n/a"
}
]
}
]
},
"affects": {
"vendor": {
"vendor_data": [
{
"vendor_name": "Linux",
"product": {
"product_data": [
{
"product_name": "Linux",
"version": {
"version_data": [
{
"version_affected": "<",
"version_name": "604326b41a6fb9b4a78b6179335decee0365cd8c",
"version_value": "905d82e6e77d16ec3e089c92b7b59a14899dfc1a"
},
{
"version_value": "not down converted",
"x_cve_json_5_version_data": {
"versions": [
{
"version": "4.20",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.20",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.287",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.231",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.174",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.120",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.66",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.5",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.13-rc2",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
],
"defaultStatus": "affected"
}
}
]
}
}
]
}
}
]
}
},
"references": {
"reference_data": [
{
"url": "https://git.kernel.org/stable/c/905d82e6e77d16ec3e089c92b7b59a14899dfc1a",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/905d82e6e77d16ec3e089c92b7b59a14899dfc1a"
},
{
"url": "https://git.kernel.org/stable/c/dbedc7e142df5ea238a46fdd7462c1c42cd36a10",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/dbedc7e142df5ea238a46fdd7462c1c42cd36a10"
},
{
"url": "https://git.kernel.org/stable/c/0d6cd1151e26fc7c2d5daa85e8984aaa685a1a12",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/0d6cd1151e26fc7c2d5daa85e8984aaa685a1a12"
},
{
"url": "https://git.kernel.org/stable/c/456f08d24afa51b5eb816c42e4ca1c44a247bd42",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/456f08d24afa51b5eb816c42e4ca1c44a247bd42"
},
{
"url": "https://git.kernel.org/stable/c/206d56f41a1509cadd06e2178c26cb830e45057d",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/206d56f41a1509cadd06e2178c26cb830e45057d"
},
{
"url": "https://git.kernel.org/stable/c/5c9e3bb43a354a2245caebbbbb4a5b8c034fdd56",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/5c9e3bb43a354a2245caebbbbb4a5b8c034fdd56"
},
{
"url": "https://git.kernel.org/stable/c/ca70b8baf2bd125b2a4d96e76db79375c07d7ff2",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/ca70b8baf2bd125b2a4d96e76db79375c07d7ff2"
"-Synchronized-Data."
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}
]
"-Synchronized-Data."
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},
"generator": {
"engine": "bippy-5f407fcff5a0"
"-Synchronized-Data."
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}
}
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