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Posted to commits@nuttx.apache.org by "zyfeier (via GitHub)" <gi...@apache.org> on 2024/10/11 01:26:49 UTC
[PR] sched/group: clear tcb group after group_release [nuttx]
zyfeier opened a new pull request, #14069:
URL: https://github.com/apache/nuttx/pull/14069
## Summary
nxsig_action will use tcb group when group release, so need clear tcb group after group_release.
[ap] dump_assert_info: Assertion failed : at file: signal/sig_action.c:205 task: ofonod process: Kernel 0xec89d5
[ap] sched_dumpstack: backtrace:
[ap] sched_dumpstack: [29] [<0x66e2e2>] backtrace_unwind+0x105/0x108
[ap] sched_dumpstack: [29] [<0x660272>] sched_backtrace+0x41/0x48
[ap] sched_dumpstack: [29] [<0x61c4dc>] sched_dumpstack+0x33/0x80
[ap] sched_dumpstack: [29] [<0x6023e4>] _assert+0x19b/0x39c
[ap] sched_dumpstack: [29] [<0x61b7e4>] __assert+0x7/0x10
[ap] sched_dumpstack: [29] [<0x6071a2>] nxsig_action+0x119/0x248
[ap] sched_dumpstack: [29] [<0x6072d8>] sigaction+0x7/0x24
[ap] sched_dumpstack: [29] [<0x66a072>] signal+0x4d/0x80
[ap] sched_dumpstack: [29] [<0x100fd36>] signalfd_file_close+0x35/0x60
[ap] sched_dumpstack: [29] [<0x64a7d8>] file_close+0x1b/0x44
[ap] sched_dumpstack: [29] [<0x649ac0>] files_putlist+0x2b/0x70
[ap] sched_dumpstack: [29] [<0x60491a>] group_leave+0x99/0xe4
[ap] sched_dumpstack: [29] [<0x605df8>] nxtask_exithook+0x4f/0xf4
[ap] sched_dumpstack: [29] [<0x603ca0>] _exit+0x33/0x3c
[ap] sched_dumpstack: [29] [<0x61ecf0>] abort+0x7/0xc
## Impact
task_exit
## Testing
BES board with ostest and monkey test pass
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Re: [PR] sched/group: clear tcb group after group_release [nuttx]
Posted by "anchao (via GitHub)" <gi...@apache.org>.
anchao commented on PR #14069:
URL: https://github.com/apache/nuttx/pull/14069#issuecomment-2406400753
Why not check the validity of the group and return error? since the group has already exited
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Re: [PR] sched/group: clear tcb group after group_release [nuttx]
Posted by "GUIDINGLI (via GitHub)" <gi...@apache.org>.
GUIDINGLI merged PR #14069:
URL: https://github.com/apache/nuttx/pull/14069
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Re: [PR] sched/group: clear tcb group after group_release [nuttx]
Posted by "nuttxpr (via GitHub)" <gi...@apache.org>.
nuttxpr commented on PR #14069:
URL: https://github.com/apache/nuttx/pull/14069#issuecomment-2406363159
[**\[Experimental Bot, please feedback here\]**](https://github.com/search?q=repo%3Aapache%2Fnuttx+13552&type=issues)
The PR summary and impact sections are lacking and don't meet the NuttX requirements. Here's a breakdown and suggestions for improvement:
**What's Missing/Needs Improvement:**
* **Summary:**
* **Why is the change necessary?** The summary mentions a bug ("Assertion failed") but doesn't explain *why* clearing the TCB group after `group_release` is the correct solution.
* **What functional part is being changed?** Be more specific than "task_exit." Which functions are modified? What data structures are affected?
* **How does the change work?** Provide a concise explanation of the mechanism used to clear the TCB group.
* **Impact:**
* **Is a new feature added?** Unclear. The description suggests a bug fix, which wouldn't be a new feature.
* **Impact on the user?** It's crucial to analyze if this change might cause applications to behave differently.
* **Other impacts:** The PR only mentions "task_exit." Analyze and address all other potential impacts (build process, hardware, documentation, security, compatibility).
**How to Improve the PR Description:**
1. **Explain the Bug:** Clearly describe the root cause of the assertion failure. Why does `nxsig_action` using the TCB group during `group_release` lead to an issue?
2. **Solution Details:** Provide a step-by-step explanation of how clearing the TCB group resolves the problem.
3. **Functional Impact:** Be specific about which functions or modules are directly affected by the code changes.
4. **User Impact:** Will this fix change any behavior observable by applications running on NuttX? If so, how?
5. **Thorough Impact Assessment:** Address *all* impact categories listed in the requirements. Even if an impact is "NO," state it explicitly (e.g., "Impact on build: NO").
6. **Testing Clarity:**
* **Environment Details:** Provide complete information about your build host and target environments (OS versions, compiler versions, specific board models).
* **Relevant Test Logs:** The current logs are not informative. Include only the relevant portions of the logs that demonstrate the bug before the fix and the successful behavior after the fix.
**Example of an Improved Summary:**
> **Fix: Assertion failure in `nxsig_action` during `group_release`**
> This PR addresses an assertion failure occurring in `nxsig_action` when a task exits while a signal is being delivered to its group. The issue arises because `nxsig_action` attempts to access the task's TCB group information during `group_release`, which may have already freed the group data.
> The fix ensures that the TCB group is explicitly cleared before `group_release` is called, preventing the invalid memory access and resolving the assertion failure.
By providing a more detailed and comprehensive PR description, you make it easier for reviewers to understand your changes and ensure they meet the NuttX project's standards.
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