[HUST CSE][rp2_common][pico_malloc.c]Modify to check if rc is a null pointer #1399

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jming912 wants to merge 1 commit from develop into develop

jming912 commented

2023-05-26 23:18:22 -05:00

(Migrated from github.com)

The code on lines 41, 58, and 75 of this code may attempt to convert a null pointer to a uint8_t* type and attempt to perform an addition operation on top of that pointer. This behavior is undefined, and the undefined result depends on the specific compiler and runtime environment. In some cases, this may cause the program to crash.
In this modified version, we first check if rc is NULL. if rc is NULL, we print a message stating that calloc failed to allocate the required memory. Only if rc is not NULL do we attempt pointer arithmetic and proceed to the next conditional step. This avoids undefined pointer operations when rc is NULL.
The issue of this pr is Fixes #1397

The code on lines 41, 58, and 75 of this code may attempt to convert a null pointer to a uint8_t* type and attempt to perform an addition operation on top of that pointer. This behavior is undefined, and the undefined result depends on the specific compiler and runtime environment. In some cases, this may cause the program to crash. In this modified version, we first check if rc is NULL. if rc is NULL, we print a message stating that calloc failed to allocate the required memory. Only if rc is not NULL do we attempt pointer arithmetic and proceed to the next conditional step. This avoids undefined pointer operations when rc is NULL. The issue of this pr is Fixes #1397

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[HUST CSE][rp2_common][pico_malloc.c]Modify to check if rc is a null pointer #1399

Pull request closed