[I] [HELP] STM32H7 hardfault in lpwork [nuttx]

["vladsomai (via GitHub)" <gi...@apache.org>]

vladsomai opened a new issue, #13614:
URL: https://github.com/apache/nuttx/issues/13614

   ### Description
   
   Hello everyone,
   
   We are using a STM32H7 based board and recently updated our NuttX version from 9.1.0 to the 12.6.0-RC1 tag. 
   We are using the TCP/IP **unbuffered** networking to send data from the STM32H7 MCU to our main controller. When there is alot of traffic between the two, we notice some big delays in replies and after a while the app crashes, on NuttX 9.1.0 we did not have this issue.
   When we switch the NuttX 12.6.0 networking to be buffered (CONFIG_NET_TCP_WRITE_BUFFERS), the network behaves better as there are not so many frequent delays in the replies and the app does not crash.
   
   
   What could be the cause of a hardfault in the lpwork when using unbuffered networking?
   
   
   The Network Driver buffer configuration is set as follows: CONFIG_NET_RECV_BUFSIZE = 32768 (32kb)
   The stack dump on hard fault looks like this when using unbuffered networking (used arm-none-eabi-addr2line to convert all the flash addresses):
   
   0x0809b2bf
   tcp_recvhandler
   /Nuttx/net/tcp/tcp_recvfrom.c:500
   
   0x080263a7
   devif_conn_event
   /Nuttx/net/devif/devif_callback.c:521
   
   0x08025c87
   tcp_callback
   /Nuttx/net/tcp/tcp_callback.c:308
   
   0x08027319
   tcp_input
   /Nuttx/net/tcp/tcp_input.c:1547
   
   0x08026405
   ipv4_in
   /Nuttx/net/devif/ipv4_input.c:149
   
   0x080264bf
   ipv4_in
   /Nuttx/net/devif/ipv4_input.c:153
   
   0x080269cf
   netdev_input
   /Nuttx/net/netdev/netdev_input.c:91
   
   0x08021dbd
   stm32_receive
   /Nuttx/arch/arm/src/chip/stm32_ethernet.c:1918
   
   0x08022fe5
   up_irq_save
   /Nuttx/include/arch/armv7-m/irq.h:416
   
   0x08023a71
   nxtask_start
   /Nuttx/sched/task/task_start.c:122
   
   
   ### Verification
   
   - [X] I have verified before submitting the report.


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Re: [I] [HELP] STM32H7 hardfault in lpwork [nuttx]

["acassis (via GitHub)" <gi...@apache.org>]

acassis commented on issue #13614:
URL: https://github.com/apache/nuttx/issues/13614#issuecomment-2377602615

   Hi @vladsomai is it possible to reproduce this issue in some common STM32 board with Ethernet? like nucle-stm32f746, etc? Is it possible to reproduce it using some existing net test application existing on nuttx-apps?
   
   If you can reproduce it, please submit a board config that we could use for testing.
   
   If you only can reproduce it on your board, I suggest you doing this test discover when the issue was introduced: grab some release version between 9.1 and 12.6 and copy your boards/arm/stm32h7/boardname to there (and include the 3 entries at boards/Kconfig).
   
   @wengzhe do you have some idea about this issue?


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