| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: qgroup: do not warn on record without old_roots populated\n\n[BUG]\nThere are some reports from the mailing list that since v6.1 kernel, the\nWARN_ON() inside btrfs_qgroup_account_extent() gets triggered during\nrescan:\n\n WARNING: CPU: 3 PID: 6424 at fs/btrfs/qgroup.c:2756 btrfs_qgroup_account_extents+0x1ae/0x260 [btrfs]\n CPU: 3 PID: 6424 Comm: snapperd Tainted: P OE 6.1.2-1-default #1 openSUSE Tumbleweed 05c7a1b1b61d5627475528f71f50444637b5aad7\n RIP: 0010:btrfs_qgroup_account_extents+0x1ae/0x260 [btrfs]\n Call Trace:\n <TASK>\n btrfs_commit_transaction+0x30c/0xb40 [btrfs c39c9c546c241c593f03bd6d5f39ea1b676250f6]\n ? start_transaction+0xc3/0x5b0 [btrfs c39c9c546c241c593f03bd6d5f39ea1b676250f6]\n btrfs_qgroup_rescan+0x42/0xc0 [btrfs c39c9c546c241c593f03bd6d5f39ea1b676250f6]\n btrfs_ioctl+0x1ab9/0x25c0 [btrfs c39c9c546c241c593f03bd6d5f39ea1b676250f6]\n ? __rseq_handle_notify_resume+0xa9/0x4a0\n ? mntput_no_expire+0x4a/0x240\n ? __seccomp_filter+0x319/0x4d0\n __x64_sys_ioctl+0x90/0xd0\n do_syscall_64+0x5b/0x80\n ? syscall_exit_to_user_mode+0x17/0x40\n ? do_syscall_64+0x67/0x80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n RIP: 0033:0x7fd9b790d9bf\n </TASK>\n\n[CAUSE]\nSince commit e15e9f43c7ca (\"btrfs: introduce\nBTRFS_QGROUP_RUNTIME_FLAG_NO_ACCOUNTING to skip qgroup accounting\"), if\nour qgroup is already in inconsistent state, we will no longer do the\ntime-consuming backref walk.\n\nThis can leave some qgroup records without a valid old_roots ulist.\nNormally this is fine, as btrfs_qgroup_account_extents() would also skip\nthose records if we have NO_ACCOUNTING flag set.\n\nBut there is a small window, if we have NO_ACCOUNTING flag set, and\ninserted some qgroup_record without a old_roots ulist, but then the user\ntriggered a qgroup rescan.\n\nDuring btrfs_qgroup_rescan(), we firstly clear NO_ACCOUNTING flag, then\ncommit current transaction.\n\nAnd since we have a qgroup_record with old_roots = NULL, we trigger the\nWARN_ON() during btrfs_qgroup_account_extents().\n\n[FIX]\nUnfortunately due to the introduction of NO_ACCOUNTING flag, the\nassumption that every qgroup_record would have its old_roots populated\nis no longer correct.\n\nFix the false alerts and drop the WARN_ON()." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/btrfs/qgroup.c" |
| ], |
| "versions": [ |
| { |
| "version": "e15e9f43c7ca25603fcf4c20d44ec777726f1034", |
| "lessThan": "bb2c2e62539f2b63c5e0beb51501d328260c7595", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "e15e9f43c7ca25603fcf4c20d44ec777726f1034", |
| "lessThan": "75181406b4eafacc531ff2ee5fb032bd93317e2b", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/btrfs/qgroup.c" |
| ], |
| "versions": [ |
| { |
| "version": "6.1", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "6.1", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.1.8", |
| "lessThanOrEqual": "6.1.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.2", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.1", |
| "versionEndExcluding": "6.1.8" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.1", |
| "versionEndExcluding": "6.2" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/bb2c2e62539f2b63c5e0beb51501d328260c7595" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/75181406b4eafacc531ff2ee5fb032bd93317e2b" |
| } |
| ], |
| "title": "btrfs: qgroup: do not warn on record without old_roots populated", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2023-52897", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
