Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: hfsplus: return error when node already exists in hfs_bnode_create When hfs_bnode_create() finds that a node is already hashed (which should not happen in normal operation), it currently returns the existing node without incrementing its reference count. This causes a reference count inconsistency that leads to a kernel panic when the node is later freed in hfs_bnode_put(): kernel BUG at fs/hfsplus/bnode.c:676! BUG_ON(!atomic_read(&node->refcnt)) This scenario can occur when hfs_bmap_alloc() attempts to allocate a node that is already in use (e.g., when node 0's bitmap bit is incorrectly unset), or due to filesystem corruption. Returning an existing node from a create path is not normal operation. Fix this by returning ERR_PTR(-EEXIST) instead of the node when it's already hashed. This properly signals the error condition to callers, which already check for IS_ERR() return values.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 634725a92938b0f282b17cec0b007dca77adebd2 before 1ca428769cb4737a25bd32fb4d1573cc09eeaeef; affected 634725a92938b0f282b17cec0b007dca77adebd2 before 507a1de58c21c95ad7c44afccaf1222d1c42246b; affected 634725a92938b0f282b17cec0b007dca77adebd2 before 986455135b95f32c1f142068e451098fc751749e; affected 634725a92938b0f282b17cec0b007dca77adebd2 before 7b57ada854b32310f224abd61bcfec2d5790ff0a; affected 634725a92938b0f282b17cec0b007dca77adebd2 before 51838112d9c22502333c3085ca0c0d691e7093c6; affected 634725a92938b0f282b17cec0b007dca77adebd2 before 2e6ff6a6fc69cc17ed10c9cb6242935d52acd52d; affected 634725a92938b0f282b17cec0b007dca77adebd2 before 2e9185a42e0e237c74435fd092b7c34537c62156; affected 634725a92938b0f282b17cec0b007dca77adebd2 before d8a73cc46c8462a969a7516131feb3096f4c49d3 |
| Linux / Linux | affected 2.6.16; unaffected 0 before 2.6.16; unaffected 5.10.252 through 5.10.*; unaffected 5.15.202 through 5.15.*; unaffected 6.1.165 through 6.1.*; unaffected 6.6.128 through 6.6.*; unaffected 6.12.75 through 6.12.*; unaffected 6.18.14 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/1ca428769cb4737a25bd32fb4d1573cc09eeaeef
- https://git.kernel.org/stable/c/507a1de58c21c95ad7c44afccaf1222d1c42246b
- https://git.kernel.org/stable/c/986455135b95f32c1f142068e451098fc751749e
- https://git.kernel.org/stable/c/7b57ada854b32310f224abd61bcfec2d5790ff0a
- https://git.kernel.org/stable/c/51838112d9c22502333c3085ca0c0d691e7093c6
- https://git.kernel.org/stable/c/2e6ff6a6fc69cc17ed10c9cb6242935d52acd52d
- https://git.kernel.org/stable/c/2e9185a42e0e237c74435fd092b7c34537c62156
- https://git.kernel.org/stable/c/d8a73cc46c8462a969a7516131feb3096f4c49d3