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186d1ca80f
Add NULL check for g_uart_devs[i] before accessing ->priv in arm_earlyserialinit() loop. When a USART is not enabled in defconfig, g_uart_devs[i] is NULL, causing a HardFault crash during early boot. The bug occurs because the original code only checked g_uart_devs[i]->priv without first verifying g_uart_devs[i] is not NULL. On Cortex-M4, NULL pointer dereference reads from Flash vector table (0x00000000 maps to 0x08000000), returning a function pointer that causes BusFault when written to. This fix matches the existing NULL check pattern used in arm_serialinit() at line 2835 of the same file. Tested on mplant-gd32f450 board with only USART5 enabled in defconfig. Before fix: HardFault at boot (IPSR=3, PC=0x080003e0) After fix: System boots normally to NSH Shell Signed-off-by: lccosy <1191294205@qq.com> |
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| arm | ||
| arm64 | ||
| avr | ||
| ceva | ||
| dummy | ||
| hc | ||
| mips | ||
| misoc | ||
| or1k | ||
| renesas | ||
| risc-v | ||
| sim | ||
| sparc | ||
| tricore | ||
| x86 | ||
| x86_64 | ||
| xtensa | ||
| z16 | ||
| z80 | ||
| CMakeLists.txt | ||
| Kconfig | ||