gsd-2024-26904
Vulnerability from gsd
Modified
2024-02-20 06:02
Details
In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix data race at btrfs_use_block_rsv() when accessing block reserve
At btrfs_use_block_rsv() we read the size of a block reserve without
locking its spinlock, which makes KCSAN complain because the size of a
block reserve is always updated while holding its spinlock. The report
from KCSAN is the following:
[653.313148] BUG: KCSAN: data-race in btrfs_update_delayed_refs_rsv [btrfs] / btrfs_use_block_rsv [btrfs]
[653.314755] read to 0x000000017f5871b8 of 8 bytes by task 7519 on cpu 0:
[653.314779] btrfs_use_block_rsv+0xe4/0x2f8 [btrfs]
[653.315606] btrfs_alloc_tree_block+0xdc/0x998 [btrfs]
[653.316421] btrfs_force_cow_block+0x220/0xe38 [btrfs]
[653.317242] btrfs_cow_block+0x1ac/0x568 [btrfs]
[653.318060] btrfs_search_slot+0xda2/0x19b8 [btrfs]
[653.318879] btrfs_del_csums+0x1dc/0x798 [btrfs]
[653.319702] __btrfs_free_extent.isra.0+0xc24/0x2028 [btrfs]
[653.320538] __btrfs_run_delayed_refs+0xd3c/0x2390 [btrfs]
[653.321340] btrfs_run_delayed_refs+0xae/0x290 [btrfs]
[653.322140] flush_space+0x5e4/0x718 [btrfs]
[653.322958] btrfs_preempt_reclaim_metadata_space+0x102/0x2f8 [btrfs]
[653.323781] process_one_work+0x3b6/0x838
[653.323800] worker_thread+0x75e/0xb10
[653.323817] kthread+0x21a/0x230
[653.323836] __ret_from_fork+0x6c/0xb8
[653.323855] ret_from_fork+0xa/0x30
[653.323887] write to 0x000000017f5871b8 of 8 bytes by task 576 on cpu 3:
[653.323906] btrfs_update_delayed_refs_rsv+0x1a4/0x250 [btrfs]
[653.324699] btrfs_add_delayed_data_ref+0x468/0x6d8 [btrfs]
[653.325494] btrfs_free_extent+0x76/0x120 [btrfs]
[653.326280] __btrfs_mod_ref+0x6a8/0x6b8 [btrfs]
[653.327064] btrfs_dec_ref+0x50/0x70 [btrfs]
[653.327849] walk_up_proc+0x236/0xa50 [btrfs]
[653.328633] walk_up_tree+0x21c/0x448 [btrfs]
[653.329418] btrfs_drop_snapshot+0x802/0x1328 [btrfs]
[653.330205] btrfs_clean_one_deleted_snapshot+0x184/0x238 [btrfs]
[653.330995] cleaner_kthread+0x2b0/0x2f0 [btrfs]
[653.331781] kthread+0x21a/0x230
[653.331800] __ret_from_fork+0x6c/0xb8
[653.331818] ret_from_fork+0xa/0x30
So add a helper to get the size of a block reserve while holding the lock.
Reading the field while holding the lock instead of using the data_race()
annotation is used in order to prevent load tearing.
Aliases
{
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2024-26904"
],
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix data race at btrfs_use_block_rsv() when accessing block reserve\n\nAt btrfs_use_block_rsv() we read the size of a block reserve without\nlocking its spinlock, which makes KCSAN complain because the size of a\nblock reserve is always updated while holding its spinlock. The report\nfrom KCSAN is the following:\n\n [653.313148] BUG: KCSAN: data-race in btrfs_update_delayed_refs_rsv [btrfs] / btrfs_use_block_rsv [btrfs]\n\n [653.314755] read to 0x000000017f5871b8 of 8 bytes by task 7519 on cpu 0:\n [653.314779] btrfs_use_block_rsv+0xe4/0x2f8 [btrfs]\n [653.315606] btrfs_alloc_tree_block+0xdc/0x998 [btrfs]\n [653.316421] btrfs_force_cow_block+0x220/0xe38 [btrfs]\n [653.317242] btrfs_cow_block+0x1ac/0x568 [btrfs]\n [653.318060] btrfs_search_slot+0xda2/0x19b8 [btrfs]\n [653.318879] btrfs_del_csums+0x1dc/0x798 [btrfs]\n [653.319702] __btrfs_free_extent.isra.0+0xc24/0x2028 [btrfs]\n [653.320538] __btrfs_run_delayed_refs+0xd3c/0x2390 [btrfs]\n [653.321340] btrfs_run_delayed_refs+0xae/0x290 [btrfs]\n [653.322140] flush_space+0x5e4/0x718 [btrfs]\n [653.322958] btrfs_preempt_reclaim_metadata_space+0x102/0x2f8 [btrfs]\n [653.323781] process_one_work+0x3b6/0x838\n [653.323800] worker_thread+0x75e/0xb10\n [653.323817] kthread+0x21a/0x230\n [653.323836] __ret_from_fork+0x6c/0xb8\n [653.323855] ret_from_fork+0xa/0x30\n\n [653.323887] write to 0x000000017f5871b8 of 8 bytes by task 576 on cpu 3:\n [653.323906] btrfs_update_delayed_refs_rsv+0x1a4/0x250 [btrfs]\n [653.324699] btrfs_add_delayed_data_ref+0x468/0x6d8 [btrfs]\n [653.325494] btrfs_free_extent+0x76/0x120 [btrfs]\n [653.326280] __btrfs_mod_ref+0x6a8/0x6b8 [btrfs]\n [653.327064] btrfs_dec_ref+0x50/0x70 [btrfs]\n [653.327849] walk_up_proc+0x236/0xa50 [btrfs]\n [653.328633] walk_up_tree+0x21c/0x448 [btrfs]\n [653.329418] btrfs_drop_snapshot+0x802/0x1328 [btrfs]\n [653.330205] btrfs_clean_one_deleted_snapshot+0x184/0x238 [btrfs]\n [653.330995] cleaner_kthread+0x2b0/0x2f0 [btrfs]\n [653.331781] kthread+0x21a/0x230\n [653.331800] __ret_from_fork+0x6c/0xb8\n [653.331818] ret_from_fork+0xa/0x30\n\nSo add a helper to get the size of a block reserve while holding the lock.\nReading the field while holding the lock instead of using the data_race()\nannotation is used in order to prevent load tearing.",
"id": "GSD-2024-26904",
"modified": "2024-02-20T06:02:29.176425Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "cve@kernel.org",
"ID": "CVE-2024-26904",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Linux",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_name": "1da177e4c3f4",
"version_value": "2daa2a8e895e"
},
{
"version_value": "not down converted",
"x_cve_json_5_version_data": {
"defaultStatus": "affected",
"versions": [
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.273",
"versionType": "custom"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.83",
"versionType": "custom"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.23",
"versionType": "custom"
},
{
"lessThanOrEqual": "6.7.*",
"status": "unaffected",
"version": "6.7.11",
"versionType": "custom"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.8",
"versionType": "original_commit_for_fix"
}
]
}
}
]
}
}
]
},
"vendor_name": "Linux"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix data race at btrfs_use_block_rsv() when accessing block reserve\n\nAt btrfs_use_block_rsv() we read the size of a block reserve without\nlocking its spinlock, which makes KCSAN complain because the size of a\nblock reserve is always updated while holding its spinlock. The report\nfrom KCSAN is the following:\n\n [653.313148] BUG: KCSAN: data-race in btrfs_update_delayed_refs_rsv [btrfs] / btrfs_use_block_rsv [btrfs]\n\n [653.314755] read to 0x000000017f5871b8 of 8 bytes by task 7519 on cpu 0:\n [653.314779] btrfs_use_block_rsv+0xe4/0x2f8 [btrfs]\n [653.315606] btrfs_alloc_tree_block+0xdc/0x998 [btrfs]\n [653.316421] btrfs_force_cow_block+0x220/0xe38 [btrfs]\n [653.317242] btrfs_cow_block+0x1ac/0x568 [btrfs]\n [653.318060] btrfs_search_slot+0xda2/0x19b8 [btrfs]\n [653.318879] btrfs_del_csums+0x1dc/0x798 [btrfs]\n [653.319702] __btrfs_free_extent.isra.0+0xc24/0x2028 [btrfs]\n [653.320538] __btrfs_run_delayed_refs+0xd3c/0x2390 [btrfs]\n [653.321340] btrfs_run_delayed_refs+0xae/0x290 [btrfs]\n [653.322140] flush_space+0x5e4/0x718 [btrfs]\n [653.322958] btrfs_preempt_reclaim_metadata_space+0x102/0x2f8 [btrfs]\n [653.323781] process_one_work+0x3b6/0x838\n [653.323800] worker_thread+0x75e/0xb10\n [653.323817] kthread+0x21a/0x230\n [653.323836] __ret_from_fork+0x6c/0xb8\n [653.323855] ret_from_fork+0xa/0x30\n\n [653.323887] write to 0x000000017f5871b8 of 8 bytes by task 576 on cpu 3:\n [653.323906] btrfs_update_delayed_refs_rsv+0x1a4/0x250 [btrfs]\n [653.324699] btrfs_add_delayed_data_ref+0x468/0x6d8 [btrfs]\n [653.325494] btrfs_free_extent+0x76/0x120 [btrfs]\n [653.326280] __btrfs_mod_ref+0x6a8/0x6b8 [btrfs]\n [653.327064] btrfs_dec_ref+0x50/0x70 [btrfs]\n [653.327849] walk_up_proc+0x236/0xa50 [btrfs]\n [653.328633] walk_up_tree+0x21c/0x448 [btrfs]\n [653.329418] btrfs_drop_snapshot+0x802/0x1328 [btrfs]\n [653.330205] btrfs_clean_one_deleted_snapshot+0x184/0x238 [btrfs]\n [653.330995] cleaner_kthread+0x2b0/0x2f0 [btrfs]\n [653.331781] kthread+0x21a/0x230\n [653.331800] __ret_from_fork+0x6c/0xb8\n [653.331818] ret_from_fork+0xa/0x30\n\nSo add a helper to get the size of a block reserve while holding the lock.\nReading the field while holding the lock instead of using the data_race()\nannotation is used in order to prevent load tearing."
}
]
},
"generator": {
"engine": "bippy-d175d3acf727"
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "n/a"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://git.kernel.org/stable/c/2daa2a8e895e6dc2395f8628c011bcf1e019040d",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/2daa2a8e895e6dc2395f8628c011bcf1e019040d"
},
{
"name": "https://git.kernel.org/stable/c/ab1be3f1aa7799f99155488c28eacaef65eb68fb",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/ab1be3f1aa7799f99155488c28eacaef65eb68fb"
},
{
"name": "https://git.kernel.org/stable/c/f6d4d29a12655b42a13cec038c2902bb7efc50ed",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/f6d4d29a12655b42a13cec038c2902bb7efc50ed"
},
{
"name": "https://git.kernel.org/stable/c/7e9422d35d574b646269ca46010a835ca074b310",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/7e9422d35d574b646269ca46010a835ca074b310"
},
{
"name": "https://git.kernel.org/stable/c/c7bb26b847e5b97814f522686068c5628e2b3646",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/c7bb26b847e5b97814f522686068c5628e2b3646"
}
]
}
},
"nvd.nist.gov": {
"cve": {
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix data race at btrfs_use_block_rsv() when accessing block reserve\n\nAt btrfs_use_block_rsv() we read the size of a block reserve without\nlocking its spinlock, which makes KCSAN complain because the size of a\nblock reserve is always updated while holding its spinlock. The report\nfrom KCSAN is the following:\n\n [653.313148] BUG: KCSAN: data-race in btrfs_update_delayed_refs_rsv [btrfs] / btrfs_use_block_rsv [btrfs]\n\n [653.314755] read to 0x000000017f5871b8 of 8 bytes by task 7519 on cpu 0:\n [653.314779] btrfs_use_block_rsv+0xe4/0x2f8 [btrfs]\n [653.315606] btrfs_alloc_tree_block+0xdc/0x998 [btrfs]\n [653.316421] btrfs_force_cow_block+0x220/0xe38 [btrfs]\n [653.317242] btrfs_cow_block+0x1ac/0x568 [btrfs]\n [653.318060] btrfs_search_slot+0xda2/0x19b8 [btrfs]\n [653.318879] btrfs_del_csums+0x1dc/0x798 [btrfs]\n [653.319702] __btrfs_free_extent.isra.0+0xc24/0x2028 [btrfs]\n [653.320538] __btrfs_run_delayed_refs+0xd3c/0x2390 [btrfs]\n [653.321340] btrfs_run_delayed_refs+0xae/0x290 [btrfs]\n [653.322140] flush_space+0x5e4/0x718 [btrfs]\n [653.322958] btrfs_preempt_reclaim_metadata_space+0x102/0x2f8 [btrfs]\n [653.323781] process_one_work+0x3b6/0x838\n [653.323800] worker_thread+0x75e/0xb10\n [653.323817] kthread+0x21a/0x230\n [653.323836] __ret_from_fork+0x6c/0xb8\n [653.323855] ret_from_fork+0xa/0x30\n\n [653.323887] write to 0x000000017f5871b8 of 8 bytes by task 576 on cpu 3:\n [653.323906] btrfs_update_delayed_refs_rsv+0x1a4/0x250 [btrfs]\n [653.324699] btrfs_add_delayed_data_ref+0x468/0x6d8 [btrfs]\n [653.325494] btrfs_free_extent+0x76/0x120 [btrfs]\n [653.326280] __btrfs_mod_ref+0x6a8/0x6b8 [btrfs]\n [653.327064] btrfs_dec_ref+0x50/0x70 [btrfs]\n [653.327849] walk_up_proc+0x236/0xa50 [btrfs]\n [653.328633] walk_up_tree+0x21c/0x448 [btrfs]\n [653.329418] btrfs_drop_snapshot+0x802/0x1328 [btrfs]\n [653.330205] btrfs_clean_one_deleted_snapshot+0x184/0x238 [btrfs]\n [653.330995] cleaner_kthread+0x2b0/0x2f0 [btrfs]\n [653.331781] kthread+0x21a/0x230\n [653.331800] __ret_from_fork+0x6c/0xb8\n [653.331818] ret_from_fork+0xa/0x30\n\nSo add a helper to get the size of a block reserve while holding the lock.\nReading the field while holding the lock instead of using the data_race()\nannotation is used in order to prevent load tearing."
}
],
"id": "CVE-2024-26904",
"lastModified": "2024-04-17T12:48:07.510",
"metrics": {},
"published": "2024-04-17T11:15:11.113",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/2daa2a8e895e6dc2395f8628c011bcf1e019040d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/7e9422d35d574b646269ca46010a835ca074b310"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ab1be3f1aa7799f99155488c28eacaef65eb68fb"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/c7bb26b847e5b97814f522686068c5628e2b3646"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f6d4d29a12655b42a13cec038c2902bb7efc50ed"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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