Bug 91569
| Summary: | sigprocmask sets mask with invalid how | ||||||
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| Product: | [Retired] Red Hat Linux | Reporter: | Steve Grubb <linux_4ever> | ||||
| Component: | kernel | Assignee: | Arjan van de Ven <arjanv> | ||||
| Status: | CLOSED UPSTREAM | QA Contact: | Brian Brock <bbrock> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 9 | ||||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | i586 | ||||||
| OS: | Linux | ||||||
| URL: | http://www.opengroup.org/onlinepubs/007908799/xsh/sigprocmask.html | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2004-08-20 14:07:47 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Hmm indeed the SUS spec says it needs to return -EINVAL; investigating Created attachment 91956 [details]
Patch to fix the problem
I also sent this patch to Linus.
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From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i586; en-US; rv:1.2.1) Gecko/20030225 Description of problem: sigprocmask is setting the signal mask even though an invalid how is sent to the kernel. Most programs do not use invalid how parameters, but setting the mask is unexpected. I read through the glibc code and it looks like a straight pass through to the kernel. Version-Release number of selected component (if applicable): kernel-2.4.20-13.9 How reproducible: Always Steps to Reproduce: 1. Compile and run the following program: #include <stdio.h> #include <signal.h> int main(void) { sigset_t actl, oactl; sigemptyset(&actl); sigemptyset(&oactl); sigaddset(&actl, SIGABRT); sigprocmask(SIG_SETMASK, &actl, NULL); // init mask to just SIGABRT sigaddset(&actl, SIGALRM); if (sigprocmask(20000, &actl, NULL) != -1) { perror("sigprocmask() did not fail even though invalid how parameter was passed to it.\n"); return 1; } sigprocmask(SIG_SETMASK, NULL, &oactl); // read mask if (sigismember(&oactl, SIGALRM) == 1) { printf("FAIL: SIGALRM was set even though how is bad. \n"); return 1; } return 0; } Actual Results: FAIL: SIGALRM was set even though how is bad. Expected Results: No printout from program