xdp: fix invalid wait context of page_pool_destroy()
In the Linux kernel, the following vulnerability has been resolved: xdp: fix invalid wait context of page_pool_destroy() If the driver uses a page pool, it creates a page pool with page_pool_create(). The reference count of page pool is 1 as default. A page pool will be destroyed only when a reference count reaches 0. page_pool_destroy() is used to destroy page pool, it decreases a reference count. When a page pool is destroyed, ->disconnect() is called, which is mem_allocator_disconnect(). This function internally acquires mutex_lock(). If the driver uses XDP, it registers a memory model with xdp_rxq_info_reg_mem_model(). The xdp_rxq_info_reg_mem_model() internally increases a page pool reference count if a memory model is a page pool. Now the reference count is 2. To destroy a page pool, the driver should call both page_pool_destroy() and xdp_unreg_mem_model(). The xdp_unreg_mem_model() internally calls page_pool_destroy(). Only page_pool_destroy() decreases a reference count. If a driver calls page_pool_destroy() then xdp_unreg_mem_model(), we will face an invalid wait context warning. Because xdp_unreg_mem_model() calls page_pool_destroy() with rcu_read_lock(). The page_pool_destroy() internally acquires mutex_lock(). Splat looks like: ============================= [ BUG: Invalid wait context ] 6.10.0-rc6+ #4 Tainted: G W ----------------------------- ethtool/1806 is trying to lock: ffffffff90387b90 (mem_id_lock){+.+.}-{4:4}, at: mem_allocator_disconnect+0x73/0x150 other
CVE-2024-43834
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-2024-43834
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": "c3f812cea0d7006469d1cf33a4a9f0a12bb4b3a3",
"lessThan": "be9d08ff102df3ac4f66e826ea935cf3af63a4bd",
"versionType": "git"
},
{
"status": "affected",
"version": "c3f812cea0d7006469d1cf33a4a9f0a12bb4b3a3",
"lessThan": "6c390ef198aa69795427a5cb5fd7cb4bc7e6cd7a",
"versionType": "git"
},
{
"status": "affected",
"version": "c3f812cea0d7006469d1cf33a4a9f0a12bb4b3a3",
"lessThan": "3fc1be360b99baeea15cdee3cf94252cd3a72d26",
"versionType": "git"
},
{
"status": "affected",
"version": "c3f812cea0d7006469d1cf33a4a9f0a12bb4b3a3",
"lessThan": "bf0ce5aa5f2525ed1b921ba36de96e458e77f482",
"versionType": "git"
},
{
"status": "affected",
"version": "c3f812cea0d7006469d1cf33a4a9f0a12bb4b3a3",
"lessThan": "12144069209eec7f2090ce9afa15acdcc2c2a537",
"versionType": "git"
},
{
"status": "affected",
"version": "c3f812cea0d7006469d1cf33a4a9f0a12bb4b3a3",
"lessThan": "59a931c5b732ca5fc2ca727f5a72aeabaafa85ec",
"versionType": "git"
},
{
"status": "affected",
"version": "bf22306d92ca59c59dc4aa3bab14768948193d56",
"versionType": "git"
},
{
"status": "affected",
"version": "05f646cb2174d1a4e032b60b99097f5c4b522616",
"versionType": "git"
},
{
"status": "affected",
"version": "5.3.18",
"lessThan": "5.4",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.5",
"lessThan": "5.5",
"versionType": "semver"
}
],
"programFiles": [
"net/core/xdp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.5"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.224",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.165",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.103",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.44",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.10.3",
"versionType": "semver",
"lessThanOrEqual": "6.10.*"
},
{
"status": "unaffected",
"version": "6.11",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/core/xdp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-43834
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26690 · Revision 1
- Added to Heist Feed
- Publisher date