Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: dm-era: fix shadowed superblock leak on take-snap failure metadata_take_snap() bumps the live superblock refcount and then dm_tm_shadow_block() allocates a new block for the metadata snapshot. If the subsequent dm_sm_inc_block() of writeset_tree_root or era_array_root fails, the function only unlocks the clone and returns. The newly allocated shadow block is never returned to the metadata space map, so each failed take-snap permanently leaks one metadata block. Free the clone with dm_sm_dec_block() on those error paths, matching the final step of metadata_drop_snap().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected eec40579d84873dfb7021eb24c50360f073237c5 before 54dd21ca945ecc07885012b9f3e8197f091cfba0; affected eec40579d84873dfb7021eb24c50360f073237c5 before ef00efb6fcaee88f50891279ceced17c614e97f7; affected eec40579d84873dfb7021eb24c50360f073237c5 before e9fa68b89214bc65af0ef963af7ec3cce9f866e0; affected eec40579d84873dfb7021eb24c50360f073237c5 before dc731d7fddfd6149f5e88ea080475d18c36d3c64; affected eec40579d84873dfb7021eb24c50360f073237c5 before d66ceeefb87ddb097b0546bafc581380b816b048; affected eec40579d84873dfb7021eb24c50360f073237c5 before 36ff918637e3517f732188a3c39dbeae5b9cfb1b; affected eec40579d84873dfb7021eb24c50360f073237c5 before 6876ca330e741fb8886d12070cb6a7f9cb67257e; affected eec40579d84873dfb7021eb24c50360f073237c5 before 39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713 |
| Linux / Linux | affected 3.15; unaffected 0 before 3.15; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/54dd21ca945ecc07885012b9f3e8197f091cfba0
- https://git.kernel.org/stable/c/ef00efb6fcaee88f50891279ceced17c614e97f7
- https://git.kernel.org/stable/c/e9fa68b89214bc65af0ef963af7ec3cce9f866e0
- https://git.kernel.org/stable/c/dc731d7fddfd6149f5e88ea080475d18c36d3c64
- https://git.kernel.org/stable/c/d66ceeefb87ddb097b0546bafc581380b816b048
- https://git.kernel.org/stable/c/36ff918637e3517f732188a3c39dbeae5b9cfb1b
- https://git.kernel.org/stable/c/6876ca330e741fb8886d12070cb6a7f9cb67257e
- https://git.kernel.org/stable/c/39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713