{"id":"CVE-2023-53865","summary":"btrfs: fix warning when putting transaction with qgroups enabled after abort","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                          &transaction-\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't actually empty the rbtree - it's still pointing to nodes that were\nfreed.\n\nSo set the rbtree's root node to NULL to avoid this warning (assign\nRB_ROOT).","modified":"2026-03-31T17:30:01.980537857Z","published":"2025-12-09T01:30:34.588Z","related":["SUSE-SU-2026:0278-1","SUSE-SU-2026:0281-1","SUSE-SU-2026:0293-1","SUSE-SU-2026:0315-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53865.json","cna_assigner":"Linux"},"references":[{"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"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53865.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53865"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"40ea30638d20c92b44107247415842b72c460459"},{"fixed":"ae91ab710d8e309f6c9eba07ce0d9d0b5d9040f0"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"81f7eb00ff5bb8326e82503a32809421d14abb8a"},{"fixed":"d2c667cc18314c9bad3ec86ae071c0342132aa09"},{"fixed":"c9060caab4135dd660c4676d1ea33a6e0d3fc09d"},{"fixed":"89e994688e965813ec0a09fb30b87fb8cee06474"},{"fixed":"62dd82bc7a90b5052c062a0ad5be6d8a479a3cfb"},{"fixed":"aa84ce8a78a1a5c10cdf9c7a5fb0c999fbc2c8d6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"4e2e49d4211db43e0ec932579dab6a969e7e8df1"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53865.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.251"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.6.0"},{"fixed":"5.15.123"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"6.1.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.4.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53865.json"}}],"schema_version":"1.7.5"}