EUVD-2026-86845
GHSA-46xm-fghf-r34f
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In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking
qla25xx_free_req_que() and qla25xx_free_rsp_que() have two pre-existing bugs exposed on the error path of qla25xx_create_{req,rsp}_que():
- When dma_alloc_coherent() fails during queue creation, the error
path calls the free function with req->ring / rsp->ring still NULL (from kzalloc). The unconditional dma_free_coherent() with a NULL cpu_addr is undefined behavior and can panic.
- The free functions clear req_qid_map / rsp_qid_map under vport_lock,
but the create functions protect the same bitmaps with mq_lock. This provides no mutual exclusion. Additionally, the create error path clears the bit and releases mq_lock before calling the free function, creating a window where another thread can allocate the same que_id and have its ha->req_q_map entry clobbered by the subsequent lockless NULL assignment in the free function.
Fix by:
- Guarding dma_free_coherent() with a NULL check on the ring pointer.
- Using mq_lock (the lock held by all creators) in the free functions
to atomically NULL the map entry and clear the bitmap bit.
- Removing the now-redundant clear_bit blocks from the create error
paths since the free functions handle it atomically.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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