JianyuWang0623 opened a new pull request, #13583:
URL: https://github.com/apache/nuttx/pull/13583
## Summary
Fix invalid pointer error when there are more than one remotes
- Log
```
[ap] arm_busfault: PANIC!!! Bus Fault:
[ap] arm_busfault: IRQ: 5 regs: 0x3c434e44
[ap] arm_busfault: BASEPRI: 00000000 PRIMASK: 00000000 IPSR:
00000005 CONTROL: 00000004
[ap] arm_busfault: CFSR: 00008200 HFSR: 00000000 DFSR: 00000000
BFAR: 00000000 AFSR: 00040000
[ap] arm_busfault: Bus Fault Reason:
[ap] arm_busfault: Precise data bus error
[ap] dump_assert_info: Current Version: NuttX ****** ***** *** 12.3.0
********** Sep 23 2024 18:35:50 arm
[ap] dump_assert_info: Assertion failed panic: at file:
armv8-m/arm_busfault.c:113 task: testdev process: testdev 0x2c86ca75
```
- Backtrace
```
backtrace_unwind
/workspace/nuttx/arch/arm/src/common/arm_backtrace_unwind.c:632
sched_backtrace
/workspace/nuttx/sched/sched/sched_backtrace.c:105
sched_dumpstack
/workspace/nuttx/libs/libc/sched/sched_dumpstack.c:69
dump_running_task
/workspace/nuttx/sched/misc/assert.c:629
arm_busfault
/workspace/nuttx/arch/arm/src/armv8-m/arm_busfault.c:113
irq_dispatch
/workspace/nuttx/sched/irq/irq_dispatch.c:142
arm_doirq
/workspace/nuttx/arch/arm/src/armv8-m/arm_doirq.c:95
strcmp
/workspace/nuttx/libs/libc/machine/arm/armv8-m/gnu/arch_strcmp.S:107
rpmsgdev_server_created
/workspace/nuttx/drivers/misc/rpmsgdev_server.c:520 (discriminator 1)
rpmsg_register_callback
/workspace/nuttx/drivers/rpmsg/rpmsg.c:245
rpmsgdev_export
/workspace/nuttx/drivers/misc/rpmsgdev_server.c:552
_register_driver
/workspace/tests/testcases/rpmsgdev/testdev.c:216
nxtask_startup
/workspace/nuttx/libs/libc/sched/task_startup.c:70
nxtask_start
/workspace/nuttx/sched/task/task_start.c:114
```
## Impact
- misc/rpmsgdev
## Testing
```
# see tests/testcases/rpmsgdev for details
# 1. Register dummy device
testdev -d 0 -r "/dev/ttyGNSS0"
# 2. Call rpmsgdev_export() to export the device to remote
testdev -d 2 -c "droid" -l "/dev/ttyGNSS0"
```
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