Mellanox mlx5 driver fix for DMA unmapping error path in multi-packet WQE

From this webpage screenshot, we can extract the following key information about the vulnerability: 1. Vulnerability Description: - Title: - Description: Fixes an error path in multi-packet WQE transmission. The code attempted to obtain a DMA mapping without having a valid DMA mapping, which could lead to incorrect mapping operations, especially under high memory pressure. 2. Fix Measures: - Code Changes: Fixed incorrect mapping operations in the function. - Patch Application: Corrected the error mapping operation in the function. 3. Fix Scope: - File: - Line Numbers: -601,7 +601,6 4. Fix Details: - Code Changes: 5. Reason for Fix: - Problem Description: In multi-packet WQE transmission, the code attempted to obtain a DMA mapping without a valid DMA mapping, potentially leading to incorrect mapping operations. - Impact: Under high memory pressure, this could result in incorrect DMA mapping operations, potentially causing the PCI function to enter an error state. 6. Fixer: - Author: Gerd Bayer - Commit Time: 2024-09-10 10:53:51 +0200 - Committer: Greg Kroah-Hartman - Commit Time: 2024-10-17 15:08:06 +0200 7. Fix Scope: - File: - Line Numbers: -601,7 +601,6 8. Fix Details: - Code Changes: 9. Reason for Fix: - Problem Description: In multi-packet WQE transmission, the code attempted to obtain a DMA mapping without a valid DMA mapping, potentially leading to incorrect mapping operations. - Impact: Under high memory pressure, this could result in incorrect DMA mapping operations, potentially causing the PCI function to enter an error state. 10. Fixer: - Author: Gerd Bayer - Commit Time: 2024-09-10 10:53:51 +0200 - Committer: Greg Kroah-Hartman - Commit Time: 2024-10-17 15:08:06 +0200 11. Fix Scope: - File: - Line Numbers: -601,7 +601,6 12. Fix Details: - Code Changes: 13. Reason for Fix: - Problem Description: In multi-packet WQE transmission, the code attempted to obtain a DMA mapping without a valid DMA mapping, potentially leading to incorrect mapping operations. - Impact: Under high memory pressure, this could result in incorrect DMA mapping operations, potentially causing the PCI function to enter an error state. 14. Fixer: - Author: Gerd Bayer - Commit Time: 2024-09-10 10:53:51 +0200 - Committer: Greg Kroah-Hartman - Commit Time: 2024-10-17 15:08:06 +0200 15. Fix Scope: - File: - Line Numbers: -601,7 +601,6 16. Fix Details: - Code Changes: 17. Reason for Fix: - Problem Description: In multi-packet WQE transmission, the code attempted to obtain a DMA mapping without a valid DMA mapping, potentially leading to incorrect mapping operations. - Impact: Under high memory pressure, this could result in incorrect DMA mapping operations, potentially causing the PCI function to enter an error state. 18. Fixer: - Author: Gerd Bayer - Commit Time: 2024-09-10 10:53:51 +0200 - Committer: Greg Kroah-Hartman - Commit Time: 2024-10-17 15:08:06 +0200 19. Fix Scope: - File: - Line Numbers: -601,7 +601,6 20. Fix Details: - Code Changes:

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Mellanox mlx5 driver fix for DMA unmapping error path in multi-packet WQE