Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Null out freed pointers in qla2x00_mem_alloc() error path When qla2x00_mem_alloc() fails, qla2x00_probe_one() jumps to probe_hw_failed and calls qla2x00_mem_free(). Several error labels in qla2x00_mem_alloc() freed adapter members (elsrej.c, purex_dma_pool, flt, sfp_data, loop_id_map, async_pd, sf_init_cb, ex_init_cb, npiv_info) but left the pointers dangling. qla2x00_mem_free() then freed them a second time. Worse, for the dma_pool members it issued dma_pool_free(ha->s_dma_pool, ...) after s_dma_pool had already been destroyed and set to NULL at fail_s_dma_pool, dereferencing a NULL pool. Clear each freed pointer (and its DMA handle) in the error labels so the subsequent qla2x00_mem_free() skips them.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d64d6c5671db5e693a0caaee79f2571b098749c9 before 5e0d6ffabbbd86b3fb9168b9dbb62190ecb20d84; affected d64d6c5671db5e693a0caaee79f2571b098749c9 before 84f5de696b8c924aeb4bf430a0bdc762fc50e99f; affected d64d6c5671db5e693a0caaee79f2571b098749c9 before a57570229edb7a0990d5c8067daeb9ac8858a961; affected d64d6c5671db5e693a0caaee79f2571b098749c9 before 286d9594a022dd7e0caa3de9daa63b896bc70d43; affected d64d6c5671db5e693a0caaee79f2571b098749c9 before 6d90f0feb929f6c0f3010f9af4747c7230b75993; affected 8540351ee8a4d540b1b7ee64b88d5e42c7c0bfbc; affected 7142b10b87d5b393a0688358b16a4b1d3680ec7d; affected 4.14.27 before 4.15; affected 4.15.10 before 4.16 |
| Linux / Linux | affected 4.16; unaffected 0 before 4.16; unaffected 6.6.160 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5e0d6ffabbbd86b3fb9168b9dbb62190ecb20d84
- https://git.kernel.org/stable/c/84f5de696b8c924aeb4bf430a0bdc762fc50e99f
- https://git.kernel.org/stable/c/a57570229edb7a0990d5c8067daeb9ac8858a961
- https://git.kernel.org/stable/c/286d9594a022dd7e0caa3de9daa63b896bc70d43
- https://git.kernel.org/stable/c/6d90f0feb929f6c0f3010f9af4747c7230b75993