Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: gfs2: fix memory leaks in gfs2_fill_super error path Fix two memory leaks in the gfs2_fill_super() error handling path when transitioning a filesystem to read-write mode fails. First leak: kthread objects (thread_struct, task_struct, etc.) When gfs2_freeze_lock_shared() fails after init_threads() succeeds, the created kernel threads (logd and quotad) are never destroyed. This occurs because the fail_per_node label doesn't call gfs2_destroy_threads(). Second leak: quota bitmap buffer (8192 bytes) When gfs2_make_fs_rw() fails after gfs2_quota_init() succeeds but before other operations complete, the allocated quota bitmap is never freed. The fix moves thread cleanup to the fail_per_node label to handle all error paths uniformly. gfs2_destroy_threads() is safe to call unconditionally as it checks for NULL pointers. Quota cleanup is added in gfs2_make_fs_rw() to properly handle the withdrawal case where quota initialization succeeds but the filesystem is then withdrawn. Thread leak backtrace (gfs2_freeze_lock_shared failure): unreferenced object 0xffff88801d7bca80 (size 4480): copy_process+0x3a1/0x4670 kernel/fork.c:2422 kernel_clone+0xf3/0x6e0 kernel/fork.c:2779 kthread_create_on_node+0x100/0x150 kernel/kthread.c:478 init_threads+0xab/0x350 fs/gfs2/ops_fstype.c:611 gfs2_fill_super+0xe5c/0x1240 fs/gfs2/ops_fstype.c:1265 Quota leak backtrace (gfs2_make_fs_rw failure): unreferenced object 0xffff88812de7c000 (size 8192): gfs2_quota_init+0xe5/0x820 fs/gfs2/quota.c:1409 gfs2_make_fs_rw+0x7a/0xe0 fs/gfs2/super.c:149 gfs2_fill_super+0xfbb/0x1240 fs/gfs2/ops_fstype.c:1275
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b66f723bb552ad59c2acb5d45ea45c890f84498b before 4db5e4c8f1103b21005ab9e7fe9a5d2554438b74; affected b66f723bb552ad59c2acb5d45ea45c890f84498b before d049ba2c1723110f82227eaf521427980811169b; affected b66f723bb552ad59c2acb5d45ea45c890f84498b before 4456be93464a599eac0eb2afa63b5d662e1599d8; affected b66f723bb552ad59c2acb5d45ea45c890f84498b before e54229ecf49add8451d5f765a32c86ab4446e06c; affected b66f723bb552ad59c2acb5d45ea45c890f84498b before da6f5bbc2e7902f578b503f2a4c3d8d09ca4b102; affected 2f8623377f3e0cfaa80558631b8694d02a492b4c; affected c713ebf2fe3f469e4af4de60a3427689ffb7c5d7; affected c2191e507147b1a22e9170ebb2aaa0f2902fcbfa; affected 9fc32dad3cdba18669c71893f3e6d96905b39b3f; affected 5.10.173 before 5.11; affected 5.15.99 before 5.16; affected 6.1.16 before 6.2; affected 6.2.3 before 6.3 |
| Linux / Linux | affected 6.3; unaffected 0 before 6.3; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.57 through 6.18.*; unaffected 6.19.4 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4db5e4c8f1103b21005ab9e7fe9a5d2554438b74
- https://git.kernel.org/stable/c/d049ba2c1723110f82227eaf521427980811169b
- https://git.kernel.org/stable/c/4456be93464a599eac0eb2afa63b5d662e1599d8
- https://git.kernel.org/stable/c/e54229ecf49add8451d5f765a32c86ab4446e06c
- https://git.kernel.org/stable/c/da6f5bbc2e7902f578b503f2a4c3d8d09ca4b102