GHSA-2JGH-C6P5-562X
Vulnerability from github – Published: 2025-12-09 18:30 – Updated: 2025-12-09 18:30In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix warning when putting transaction with qgroups enabled after abort
If we have a transaction abort with qgroups enabled we get a warning triggered when doing the final put on the transaction, like this:
[552.6789] ------------[ cut here ]------------ [552.6815] WARNING: CPU: 4 PID: 81745 at fs/btrfs/transaction.c:144 btrfs_put_transaction+0x123/0x130 [btrfs] [552.6817] Modules linked in: btrfs blake2b_generic xor (...) [552.6819] CPU: 4 PID: 81745 Comm: btrfs-transacti Tainted: G W 6.4.0-rc6-btrfs-next-134+ #1 [552.6819] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-0-gea1b7a073390-prebuilt.qemu.org 04/01/2014 [552.6819] RIP: 0010:btrfs_put_transaction+0x123/0x130 [btrfs] [552.6821] Code: bd a0 01 00 (...) [552.6821] RSP: 0018:ffffa168c0527e28 EFLAGS: 00010286 [552.6821] RAX: ffff936042caed00 RBX: ffff93604a3eb448 RCX: 0000000000000000 [552.6821] RDX: ffff93606421b028 RSI: ffffffff92ff0878 RDI: ffff93606421b010 [552.6821] RBP: ffff93606421b000 R08: 0000000000000000 R09: ffffa168c0d07c20 [552.6821] R10: 0000000000000000 R11: ffff93608dc52950 R12: ffffa168c0527e70 [552.6821] R13: ffff93606421b000 R14: ffff93604a3eb420 R15: ffff93606421b028 [552.6821] FS: 0000000000000000(0000) GS:ffff93675fb00000(0000) knlGS:0000000000000000 [552.6821] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [552.6821] CR2: 0000558ad262b000 CR3: 000000014feda005 CR4: 0000000000370ee0 [552.6822] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [552.6822] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [552.6822] Call Trace: [552.6822] [552.6822] ? __warn+0x80/0x130 [552.6822] ? btrfs_put_transaction+0x123/0x130 [btrfs] [552.6824] ? report_bug+0x1f4/0x200 [552.6824] ? handle_bug+0x42/0x70 [552.6824] ? exc_invalid_op+0x14/0x70 [552.6824] ? asm_exc_invalid_op+0x16/0x20 [552.6824] ? btrfs_put_transaction+0x123/0x130 [btrfs] [552.6826] btrfs_cleanup_transaction+0xe7/0x5e0 [btrfs] [552.6828] ? _raw_spin_unlock_irqrestore+0x23/0x40 [552.6828] ? try_to_wake_up+0x94/0x5e0 [552.6828] ? __pfx_process_timeout+0x10/0x10 [552.6828] transaction_kthread+0x103/0x1d0 [btrfs] [552.6830] ? __pfx_transaction_kthread+0x10/0x10 [btrfs] [552.6832] kthread+0xee/0x120 [552.6832] ? __pfx_kthread+0x10/0x10 [552.6832] ret_from_fork+0x29/0x50 [552.6832] [552.6832] ---[ end trace 0000000000000000 ]---
This corresponds to this line of code:
void btrfs_put_transaction(struct btrfs_transaction *transaction) { (...) WARN_ON(!RB_EMPTY_ROOT( &transaction->delayed_refs.dirty_extent_root)); (...) }
The warning happens because btrfs_qgroup_destroy_extent_records(), called in the transaction abort path, we free all entries from the rbtree "dirty_extent_root" with rbtree_postorder_for_each_entry_safe(), but we don't actually empty the rbtree - it's still pointing to nodes that were freed.
So set the rbtree's root node to NULL to avoid this warning (assign RB_ROOT).
{
"affected": [],
"aliases": [
"CVE-2023-53865"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-09T16:17:27Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix warning when putting transaction with qgroups enabled after abort\n\nIf we have a transaction abort with qgroups enabled we get a warning\ntriggered when doing the final put on the transaction, like this:\n\n [552.6789] ------------[ cut here ]------------\n [552.6815] WARNING: CPU: 4 PID: 81745 at fs/btrfs/transaction.c:144 btrfs_put_transaction+0x123/0x130 [btrfs]\n [552.6817] Modules linked in: btrfs blake2b_generic xor (...)\n [552.6819] CPU: 4 PID: 81745 Comm: btrfs-transacti Tainted: G W 6.4.0-rc6-btrfs-next-134+ #1\n [552.6819] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-0-gea1b7a073390-prebuilt.qemu.org 04/01/2014\n [552.6819] RIP: 0010:btrfs_put_transaction+0x123/0x130 [btrfs]\n [552.6821] Code: bd a0 01 00 (...)\n [552.6821] RSP: 0018:ffffa168c0527e28 EFLAGS: 00010286\n [552.6821] RAX: ffff936042caed00 RBX: ffff93604a3eb448 RCX: 0000000000000000\n [552.6821] RDX: ffff93606421b028 RSI: ffffffff92ff0878 RDI: ffff93606421b010\n [552.6821] RBP: ffff93606421b000 R08: 0000000000000000 R09: ffffa168c0d07c20\n [552.6821] R10: 0000000000000000 R11: ffff93608dc52950 R12: ffffa168c0527e70\n [552.6821] R13: ffff93606421b000 R14: ffff93604a3eb420 R15: ffff93606421b028\n [552.6821] FS: 0000000000000000(0000) GS:ffff93675fb00000(0000) knlGS:0000000000000000\n [552.6821] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n [552.6821] CR2: 0000558ad262b000 CR3: 000000014feda005 CR4: 0000000000370ee0\n [552.6822] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n [552.6822] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n [552.6822] Call Trace:\n [552.6822] \u003cTASK\u003e\n [552.6822] ? __warn+0x80/0x130\n [552.6822] ? btrfs_put_transaction+0x123/0x130 [btrfs]\n [552.6824] ? report_bug+0x1f4/0x200\n [552.6824] ? handle_bug+0x42/0x70\n [552.6824] ? exc_invalid_op+0x14/0x70\n [552.6824] ? asm_exc_invalid_op+0x16/0x20\n [552.6824] ? btrfs_put_transaction+0x123/0x130 [btrfs]\n [552.6826] btrfs_cleanup_transaction+0xe7/0x5e0 [btrfs]\n [552.6828] ? _raw_spin_unlock_irqrestore+0x23/0x40\n [552.6828] ? try_to_wake_up+0x94/0x5e0\n [552.6828] ? __pfx_process_timeout+0x10/0x10\n [552.6828] transaction_kthread+0x103/0x1d0 [btrfs]\n [552.6830] ? __pfx_transaction_kthread+0x10/0x10 [btrfs]\n [552.6832] kthread+0xee/0x120\n [552.6832] ? __pfx_kthread+0x10/0x10\n [552.6832] ret_from_fork+0x29/0x50\n [552.6832] \u003c/TASK\u003e\n [552.6832] ---[ end trace 0000000000000000 ]---\n\nThis corresponds to this line of code:\n\n void btrfs_put_transaction(struct btrfs_transaction *transaction)\n {\n (...)\n WARN_ON(!RB_EMPTY_ROOT(\n \u0026transaction-\u003edelayed_refs.dirty_extent_root));\n (...)\n }\n\nThe warning happens because btrfs_qgroup_destroy_extent_records(), called\nin the transaction abort path, we free all entries from the rbtree\n\"dirty_extent_root\" with rbtree_postorder_for_each_entry_safe(), but we\ndon\u0027t actually empty the rbtree - it\u0027s still pointing to nodes that were\nfreed.\n\nSo set the rbtree\u0027s root node to NULL to avoid this warning (assign\nRB_ROOT).",
"id": "GHSA-2jgh-c6p5-562x",
"modified": "2025-12-09T18:30:34Z",
"published": "2025-12-09T18:30:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53865"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/62dd82bc7a90b5052c062a0ad5be6d8a479a3cfb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/89e994688e965813ec0a09fb30b87fb8cee06474"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/aa84ce8a78a1a5c10cdf9c7a5fb0c999fbc2c8d6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ae91ab710d8e309f6c9eba07ce0d9d0b5d9040f0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c9060caab4135dd660c4676d1ea33a6e0d3fc09d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d2c667cc18314c9bad3ec86ae071c0342132aa09"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.