Bug 437137
| Summary: | Calling dlm_ls_lockx() wth LKF_VALBLK set and NULL sb_lvbptr seg faults libdlm. | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Dean Jansa <djansa> |
| Component: | cman | Assignee: | Christine Caulfield <ccaulfie> |
| Status: | CLOSED ERRATA | QA Contact: | GFS Bugs <gfs-bugs> |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | 5.2 | CC: | cluster-maint, edamato, teigland |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2009-01-20 21:52:21 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: | |||
Forgot to include the flags in the gdb output:
(gdb) up
#1 0x00002aaaae09d854 in lockObjCmd (cdata=0x1cb5cd40, interp=0x1cb22100,
objc=7, objv=0x1cb37a58) at tcl_dlm.c:568
568 if (dlm_ls_lockx(dlmPtr->lsPtr->lsh, mode, lkPtr->lksb, flags, resourceStr,
(gdb) p flags
$3 = 8
The branch, master has been updated
via 5c00e231b21d2b8e0be1b4dd028122313e603597 (commit)
from 674aec455c8f4506c390532276d1392aa017f1b6 (commit)
The branch, STABLE2 has been updated
via 31b6d55cadb4aa87a76d907dc2fa7696fda89379 (commit)
from 088cad7ce9f46b501fcfd8475c71e0909a86d895 (commit)
commit in RHEL5 branch 0484ef93e8d09313f8f110d23c2a6a6b4aca2f60 An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2009-0189.html |
Description of problem: I called dlm_ls_lock() with a the LKF_VALBLK flag and had initialized the lksb.sb_lvbptr to NULL. This resulted in a SIGSEGV from libdlm: Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 46912496179680 (LWP 16933)] 0x000000343ca0317b in unlock_resource () from /usr/lib64/libdlm.so.2 (gdb) bt #0 0x000000343ca0317b in unlock_resource () from /usr/lib64/libdlm.so.2 (gdb) up #1 0x00002aaaae09d854 in lockObjCmd (cdata=0x1cb5cd40, interp=0x1cb22100, objc=7, objv=0x1cb37a58) at tcl_dlm.c:568 568 if (dlm_ls_lockx(dlmPtr->lsPtr->lsh, mode, lkPtr->lksb, flags, resourceStr, (gdb) p lkPtr->lksb $1 = (struct dlm_lksb *) 0x1cb925b0 (gdb) p (*lkPtr->lksb) $2 = {sb_status = 0, sb_lkid = 0, sb_flags = 0 '\0', sb_lvbptr = 0x0} Version-Release number of selected component (if applicable): cman-devel-2.0.80-1.el5 cman-2.0.80-1.el5 How reproducible: Every time Steps to Reproduce: Make a call to dlm_ls_lockx() with LKF_VALBLK flag and a NULL sb_lvbptr. Expected results: Error from libdlm.