Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: 2cff8743ced9c2f79014a19077e91537fb938bb8
https://github.com/tianocore/edk2/commit/2cff8743ced9c2f79014a19077e91537fb938bb8
Author: PaddyDeng <[email protected]>
Date: 2025-05-05 (Mon, 05 May 2025)
Changed paths:
M MdeModulePkg/Bus/Spi/SpiNorFlashJedecSfdp/SpiNorFlash.c
Log Message:
-----------
MdeModulePkg/Spi: Solving potential null ptr deref. in SpiNorFlashJedecSfdp
The pointer `Instance->SfdpBasicFlash` can be used before initializing.
Example code flow:
- CreateSpiNorFlashSfdpInstance: Allocate pool for `Instance`
- InitialSpiNorFlashSfdpInstance
- ReadSfdp
- ReadSfdpHeader
- FillWriteBuffer: Dereferencing
`Instance->SfdpBasicFlash`
- ReadSfdpBasicParameterTable: Allocate pool for
`Instance->SfdpBasicFlash`
Check both `Instance` and `Instance->SfdpBasicFlash` should have
a non null value before dereferencing it. Otherwise use the defaut
value 0.
Also terminate the function if `Instance` or `WriteBuffer` is NULL.
Signed-off-by: Paddy Deng <[email protected]>
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