gsd-2023-52582
Vulnerability from gsd
Modified
2024-03-03 06:01
Details
In the Linux kernel, the following vulnerability has been resolved:
netfs: Only call folio_start_fscache() one time for each folio
If a network filesystem using netfs implements a clamp_length()
function, it can set subrequest lengths smaller than a page size.
When we loop through the folios in netfs_rreq_unlock_folios() to
set any folios to be written back, we need to make sure we only
call folio_start_fscache() once for each folio.
Otherwise, this simple testcase:
mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs
dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1
1+0 records in
1+0 records out
4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s
echo 3 > /proc/sys/vm/drop_caches
cat /mnt/nfs/file.bin > /dev/null
will trigger an oops similar to the following:
page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio))
------------[ cut here ]------------
kernel BUG at include/linux/netfs.h:44!
...
CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5
...
RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs]
...
Call Trace:
netfs_rreq_assess+0x497/0x660 [netfs]
netfs_subreq_terminated+0x32b/0x610 [netfs]
nfs_netfs_read_completion+0x14e/0x1a0 [nfs]
nfs_read_completion+0x2f9/0x330 [nfs]
rpc_free_task+0x72/0xa0 [sunrpc]
rpc_async_release+0x46/0x70 [sunrpc]
process_one_work+0x3bd/0x710
worker_thread+0x89/0x610
kthread+0x181/0x1c0
ret_from_fork+0x29/0x50
Aliases
{ "gsd": { "metadata": { "exploitCode": "unknown", "remediation": "unknown", "reportConfidence": "confirmed", "type": "vulnerability" }, "osvSchema": { "aliases": [ "CVE-2023-52582" ], "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Only call folio_start_fscache() one time for each folio\n\nIf a network filesystem using netfs implements a clamp_length()\nfunction, it can set subrequest lengths smaller than a page size.\n\nWhen we loop through the folios in netfs_rreq_unlock_folios() to\nset any folios to be written back, we need to make sure we only\ncall folio_start_fscache() once for each folio.\n\nOtherwise, this simple testcase:\n\n mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs\n dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1\n 1+0 records in\n 1+0 records out\n 4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s\n echo 3 \u003e /proc/sys/vm/drop_caches\n cat /mnt/nfs/file.bin \u003e /dev/null\n\nwill trigger an oops similar to the following:\n\n page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio))\n ------------[ cut here ]------------\n kernel BUG at include/linux/netfs.h:44!\n ...\n CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5\n ...\n RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs]\n ...\n Call Trace:\n netfs_rreq_assess+0x497/0x660 [netfs]\n netfs_subreq_terminated+0x32b/0x610 [netfs]\n nfs_netfs_read_completion+0x14e/0x1a0 [nfs]\n nfs_read_completion+0x2f9/0x330 [nfs]\n rpc_free_task+0x72/0xa0 [sunrpc]\n rpc_async_release+0x46/0x70 [sunrpc]\n process_one_work+0x3bd/0x710\n worker_thread+0x89/0x610\n kthread+0x181/0x1c0\n ret_from_fork+0x29/0x50", "id": "GSD-2023-52582", "modified": "2024-03-03T06:01:51.732889Z", "schema_version": "1.4.0" } }, "namespaces": { "cve.org": { "CVE_data_meta": { "ASSIGNER": "cve@kernel.org", "ID": "CVE-2023-52582", "STATE": "PUBLIC" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "\u003c", "version_name": "3d3c95046742", "version_value": "df9950d37df1" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "affected", "versions": [ { "status": "affected", "version": "5.13" }, { "lessThan": "5.13", "status": "unaffected", "version": "0", "versionType": "custom" }, { "lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.56", "versionType": "custom" }, { "lessThanOrEqual": "6.5.*", "status": "unaffected", "version": "6.5.6", "versionType": "custom" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "6.6", "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\nnetfs: Only call folio_start_fscache() one time for each folio\n\nIf a network filesystem using netfs implements a clamp_length()\nfunction, it can set subrequest lengths smaller than a page size.\n\nWhen we loop through the folios in netfs_rreq_unlock_folios() to\nset any folios to be written back, we need to make sure we only\ncall folio_start_fscache() once for each folio.\n\nOtherwise, this simple testcase:\n\n mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs\n dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1\n 1+0 records in\n 1+0 records out\n 4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s\n echo 3 \u003e /proc/sys/vm/drop_caches\n cat /mnt/nfs/file.bin \u003e /dev/null\n\nwill trigger an oops similar to the following:\n\n page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio))\n ------------[ cut here ]------------\n kernel BUG at include/linux/netfs.h:44!\n ...\n CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5\n ...\n RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs]\n ...\n Call Trace:\n netfs_rreq_assess+0x497/0x660 [netfs]\n netfs_subreq_terminated+0x32b/0x610 [netfs]\n nfs_netfs_read_completion+0x14e/0x1a0 [nfs]\n nfs_read_completion+0x2f9/0x330 [nfs]\n rpc_free_task+0x72/0xa0 [sunrpc]\n rpc_async_release+0x46/0x70 [sunrpc]\n process_one_work+0x3bd/0x710\n worker_thread+0x89/0x610\n kthread+0x181/0x1c0\n ret_from_fork+0x29/0x50" } ] }, "generator": { "engine": "bippy-4986f5686161" }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "references": { "reference_data": [ { "name": "https://git.kernel.org/stable/c/df9950d37df113db59495fa09d060754366a2b7c", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/df9950d37df113db59495fa09d060754366a2b7c" }, { "name": "https://git.kernel.org/stable/c/d9f5537479d4ec97ea92ff24e81a517d5772581a", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/d9f5537479d4ec97ea92ff24e81a517d5772581a" }, { "name": "https://git.kernel.org/stable/c/df1c357f25d808e30b216188330e708e09e1a412", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/df1c357f25d808e30b216188330e708e09e1a412" } ] } }, "nvd.nist.gov": { "cve": { "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Only call folio_start_fscache() one time for each folio\n\nIf a network filesystem using netfs implements a clamp_length()\nfunction, it can set subrequest lengths smaller than a page size.\n\nWhen we loop through the folios in netfs_rreq_unlock_folios() to\nset any folios to be written back, we need to make sure we only\ncall folio_start_fscache() once for each folio.\n\nOtherwise, this simple testcase:\n\n mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs\n dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1\n 1+0 records in\n 1+0 records out\n 4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s\n echo 3 \u003e /proc/sys/vm/drop_caches\n cat /mnt/nfs/file.bin \u003e /dev/null\n\nwill trigger an oops similar to the following:\n\n page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio))\n ------------[ cut here ]------------\n kernel BUG at include/linux/netfs.h:44!\n ...\n CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5\n ...\n RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs]\n ...\n Call Trace:\n netfs_rreq_assess+0x497/0x660 [netfs]\n netfs_subreq_terminated+0x32b/0x610 [netfs]\n nfs_netfs_read_completion+0x14e/0x1a0 [nfs]\n nfs_read_completion+0x2f9/0x330 [nfs]\n rpc_free_task+0x72/0xa0 [sunrpc]\n rpc_async_release+0x46/0x70 [sunrpc]\n process_one_work+0x3bd/0x710\n worker_thread+0x89/0x610\n kthread+0x181/0x1c0\n ret_from_fork+0x29/0x50" } ], "id": "CVE-2023-52582", "lastModified": "2024-03-04T13:58:23.447", "metrics": {}, "published": "2024-03-02T22:15:49.770", "references": [ { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d9f5537479d4ec97ea92ff24e81a517d5772581a" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/df1c357f25d808e30b216188330e708e09e1a412" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/df9950d37df113db59495fa09d060754366a2b7c" } ], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis" } } } }
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Sightings
Author | Source | Type | Date |
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Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.