cve-2024-39296
Vulnerability from cvelistv5
Published
2024-06-25 14:22
Modified
2024-11-05 09:31
Severity ?
EPSS score ?
Summary
bonding: fix oops during rmmod
References
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"id": "CVE-2024-39296",
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"timestamp": "2024-06-25T20:46:46.560534Z",
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"affected": [
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"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/bonding/bond_main.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: fix oops during rmmod\n\n\"rmmod bonding\" causes an oops ever since commit cc317ea3d927 (\"bonding:\nremove redundant NULL check in debugfs function\"). Here are the relevant\nfunctions being called:\n\nbonding_exit()\n bond_destroy_debugfs()\n debugfs_remove_recursive(bonding_debug_root);\n bonding_debug_root = NULL; \u003c--------- SET TO NULL HERE\n bond_netlink_fini()\n rtnl_link_unregister()\n __rtnl_link_unregister()\n unregister_netdevice_many_notify()\n bond_uninit()\n bond_debug_unregister()\n (commit removed check for bonding_debug_root == NULL)\n debugfs_remove()\n simple_recursive_removal()\n down_write() -\u003e OOPS\n\nHowever, reverting the bad commit does not solve the problem completely\nbecause the original code contains a race that could cause the same\noops, although it was much less likely to be triggered unintentionally:\n\nCPU1\n rmmod bonding\n bonding_exit()\n bond_destroy_debugfs()\n debugfs_remove_recursive(bonding_debug_root);\n\nCPU2\n echo -bond0 \u003e /sys/class/net/bonding_masters\n bond_uninit()\n bond_debug_unregister()\n if (!bonding_debug_root)\n\nCPU1\n bonding_debug_root = NULL;\n\nSo do NOT revert the bad commit (since the removed checks were racy\nanyway), and instead change the order of actions taken during module\nremoval. The same oops can also happen if there is an error during\nmodule init, so apply the same fix there."
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"title": "bonding: fix oops during rmmod",
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"cveId": "CVE-2024-39296",
"datePublished": "2024-06-25T14:22:40.218Z",
"dateReserved": "2024-06-24T13:54:11.074Z",
"dateUpdated": "2024-11-05T09:31:40.637Z",
"state": "PUBLISHED"
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"nvd": "{\"cve\":{\"id\":\"CVE-2024-39296\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-25T15:15:14.070\",\"lastModified\":\"2024-06-25T18:50:42.040\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbonding: fix oops during rmmod\\n\\n\\\"rmmod bonding\\\" causes an oops ever since commit cc317ea3d927 (\\\"bonding:\\nremove redundant NULL check in debugfs function\\\"). Here are the relevant\\nfunctions being called:\\n\\nbonding_exit()\\n bond_destroy_debugfs()\\n debugfs_remove_recursive(bonding_debug_root);\\n bonding_debug_root = NULL; \u003c--------- SET TO NULL HERE\\n bond_netlink_fini()\\n rtnl_link_unregister()\\n __rtnl_link_unregister()\\n unregister_netdevice_many_notify()\\n bond_uninit()\\n bond_debug_unregister()\\n (commit removed check for bonding_debug_root == NULL)\\n debugfs_remove()\\n simple_recursive_removal()\\n down_write() -\u003e OOPS\\n\\nHowever, reverting the bad commit does not solve the problem completely\\nbecause the original code contains a race that could cause the same\\noops, although it was much less likely to be triggered unintentionally:\\n\\nCPU1\\n rmmod bonding\\n bonding_exit()\\n bond_destroy_debugfs()\\n debugfs_remove_recursive(bonding_debug_root);\\n\\nCPU2\\n echo -bond0 \u003e /sys/class/net/bonding_masters\\n bond_uninit()\\n bond_debug_unregister()\\n if (!bonding_debug_root)\\n\\nCPU1\\n bonding_debug_root = NULL;\\n\\nSo do NOT revert the bad commit (since the removed checks were racy\\nanyway), and instead change the order of actions taken during module\\nremoval. The same oops can also happen if there is an error during\\nmodule init, so apply the same fix there.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/a45835a0bb6ef7d5ddbc0714dd760de979cb6ece\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf48aee81103ca06d09d73d33fb72f1191069aa6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f07224c16678a8af54ddc059b3d2d51885d7f35e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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