CVE-2023-52897— btrfs: qgroup: do not warn on record without old_roots populated
Affected Version Matrix 6
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I. Basic Information for CVE-2023-52897
Vulnerability Information
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Vulnerability Title
btrfs: qgroup: do not warn on record without old_roots populated
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: qgroup: do not warn on record without old_roots populated [BUG] There are some reports from the mailing list that since v6.1 kernel, the WARN_ON() inside btrfs_qgroup_account_extent() gets triggered during rescan: WARNING: CPU: 3 PID: 6424 at fs/btrfs/qgroup.c:2756 btrfs_qgroup_account_extents+0x1ae/0x260 [btrfs] CPU: 3 PID: 6424 Comm: snapperd Tainted: P OE 6.1.2-1-default #1 openSUSE Tumbleweed 05c7a1b1b61d5627475528f71f50444637b5aad7 RIP: 0010:btrfs_qgroup_account_extents+0x1ae/0x260 [btrfs] Call Trace: <TASK> btrfs_commit_transaction+0x30c/0xb40 [btrfs c39c9c546c241c593f03bd6d5f39ea1b676250f6] ? start_transaction+0xc3/0x5b0 [btrfs c39c9c546c241c593f03bd6d5f39ea1b676250f6] btrfs_qgroup_rescan+0x42/0xc0 [btrfs c39c9c546c241c593f03bd6d5f39ea1b676250f6] btrfs_ioctl+0x1ab9/0x25c0 [btrfs c39c9c546c241c593f03bd6d5f39ea1b676250f6] ? __rseq_handle_notify_resume+0xa9/0x4a0 ? mntput_no_expire+0x4a/0x240 ? __seccomp_filter+0x319/0x4d0 __x64_sys_ioctl+0x90/0xd0 do_syscall_64+0x5b/0x80 ? syscall_exit_to_user_mode+0x17/0x40 ? do_syscall_64+0x67/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd9b790d9bf </TASK> [CAUSE] Since commit e15e9f43c7ca ("btrfs: introduce BTRFS_QGROUP_RUNTIME_FLAG_NO_ACCOUNTING to skip qgroup accounting"), if our qgroup is already in inconsistent state, we will no longer do the time-consuming backref walk. This can leave some qgroup records without a valid old_roots ulist. Normally this is fine, as btrfs_qgroup_account_extents() would also skip those records if we have NO_ACCOUNTING flag set. But there is a small window, if we have NO_ACCOUNTING flag set, and inserted some qgroup_record without a old_roots ulist, but then the user triggered a qgroup rescan. During btrfs_qgroup_rescan(), we firstly clear NO_ACCOUNTING flag, then commit current transaction. And since we have a qgroup_record with old_roots = NULL, we trigger the WARN_ON() during btrfs_qgroup_account_extents(). [FIX] Unfortunately due to the introduction of NO_ACCOUNTING flag, the assumption that every qgroup_record would have its old_roots populated is no longer correct. Fix the false alerts and drop the WARN_ON().
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于 btrfs 文件系统在qgroup重扫时不应该警告记录没有old_roots。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-52897
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Other References for CVE-2023-52897 (2)
Same Patch Batch · Linux · 2024-08-21 · 68 CVEs total
| CVE-2023-52910 | 8.8 HIGH | iommu/iova: Fix alloc iova overflows issue |
| CVE-2024-43881 | 8.8 HIGH | wifi: ath12k: change DMA direction while mapping reinjected packets |
| CVE-2022-48871 | 8.8 HIGH | tty: serial: qcom-geni-serial: fix slab-out-of-bounds on RX FIFO buffer |
| CVE-2024-43878 | 8.1 HIGH | xfrm: Fix input error path memory access |
| CVE-2022-48883 | 7.8 HIGH | net/mlx5e: IPoIB, Block PKEY interfaces with less rx queues than parent |
| CVE-2024-43882 | 7.8 HIGH | exec: Fix ToCToU between perm check and set-uid/gid usage |
| CVE-2023-52913 | 7.8 HIGH | drm/i915: Fix potential context UAFs |
| CVE-2022-48892 | 7.8 HIGH | sched/core: Fix use-after-free bug in dup_user_cpus_ptr() |
| CVE-2024-43877 | 7.8 HIGH | media: pci: ivtv: Add check for DMA map result |
| CVE-2024-43880 | 7.8 HIGH | mlxsw: spectrum_acl_erp: Fix object nesting warning |
| CVE-2022-48899 | 7.8 HIGH | drm/virtio: Fix GEM handle creation UAF |
| CVE-2022-48872 | 7.8 HIGH | misc: fastrpc: Fix use-after-free race condition for maps |
| CVE-2022-48873 | 7.8 HIGH | misc: fastrpc: Don't remove map on creater_process and device_release |
| CVE-2022-48874 | 7.8 HIGH | misc: fastrpc: Fix use-after-free and race in fastrpc_map_find |
| CVE-2023-52903 | 7.8 HIGH | io_uring: lock overflowing for IOPOLL |
| CVE-2022-48887 | 7.8 HIGH | drm/vmwgfx: Remove rcu locks from user resources |
| CVE-2022-48878 | 7.8 HIGH | Bluetooth: hci_qca: Fix driver shutdown on closed serdev |
| CVE-2023-52907 | 7.8 HIGH | nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame() |
| CVE-2023-52909 | 7.5 HIGH | nfsd: fix handling of cached open files in nfsd4_open codepath |
| CVE-2024-43872 | 7.5 HIGH | RDMA/hns: Fix soft lockup under heavy CEQE load |
Showing top 20 of 68 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
Same vendor: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
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