Bug 730000
| Summary: | segfault in nfs-utils-1.2.3-7.el6 when showmount -a is run after umount | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Jon Magrini <jmagrini> | ||||||
| Component: | nfs-utils | Assignee: | Steve Dickson <steved> | ||||||
| Status: | CLOSED DUPLICATE | QA Contact: | yanfu,wang <yanwang> | ||||||
| Severity: | medium | Docs Contact: | |||||||
| Priority: | high | ||||||||
| Version: | 6.1 | CC: | dwysocha, ron.cronenwett | ||||||
| Target Milestone: | rc | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | x86_64 | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2011-08-11 22:01:30 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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Created attachment 517816 [details]
kbase
Just verified that the patch from fedora bug 669065 is not in nfs-utils-1.2.3-7.el6, so this should be a simple backport of that one-line patch: diff -rNup nfs-utils-1.2.3_orig/utils/mountd/rmtab.c nfs-utils-1.2.3/utils/mountd/rmtab.c --- nfs-utils-1.2.3/utils/mountd/rmtab.c 2010-09-28 14:24:16.000000000 +0200 +++ nfs-utils-1.2.3/utils/mountd/rmtab.c 2011-01-12 14:44:22.320000000 +0100 @@ -205,6 +205,7 @@ mountlist_list(void) } if (stb.st_mtime != last_mtime) { mountlist_freeall(mlist); + mlist=NULL; last_mtime = stb.st_mtime; setrmtabent("r"); *** This bug has been marked as a duplicate of bug 723438 *** |
Created attachment 517813 [details] coredump details Description of problem: rpc.mountd segfault on NFSv3 server after "umount" followed by "showmount -a" on client system Version-Release number of selected component (if applicable): NFS Server: kernel: 2.6.32-131.6.1.el6.x86_64 arch: x86_64 nfs: nfs-utils-1.2.3-7.el6.x86_64 nfs4-acl-tools-0.3.3-5.el6.x86_64 nfs-utils-lib-1.1.5-3.el6.x86_64 # cat /etc/exports /san_disk *(rw,fsid=0,sync,all_squash,anonuid=500,anongid=500) [root@bignasty ~]# showmount -e Export list for bignasty.usersys.redhat.com: /san_disk * Client: kernel: 2.6.32-131.6.1.el6.x86_64 arch: x86_64 nfs: nfs-utils-lib-1.1.5-3.el6.x86_64 nfs4-acl-tools-0.3.3-5.el6.x86_64 nfs-utils-1.2.3-7.el6.x86_64 How reproducible: repeatable Steps to Reproduce: 1. Create nfs export on server 2. Client mounts export mount -t nfs <ip>:/san_disk -o nfsvers=3,nolock /mnt/nfs_share/ 3. On client, run showmount -a <server_ip> 4. On client, unmount /mnt/nfs_share 5. On client, run showmount -a <server_ip> 6. segfault occurs on nfs server More Details: Server: # cat /etc/exports /san_disk *(rw,fsid=0,sync,all_squash,anonuid=500,anongid=500) # showmount -e Export list for <nfs_server>: /san_disk * Client: # mount -t nfs <server_ip>:/san_disk -o nfsvers=3,nolock /mnt/nfs_share/ # mount ... <ip>:/san_disk on /mnt/nfs_share type nfs (rw,nfsvers=3,nolock,addr=<server_ip>) # showmount -a <server_ip> All mount points on <server_ip>: <client_ip>:/san_disk # umount /mnt/nfs_share/ # showmount -a <server_ip> rpc mount dump: RPC: Unable to receive; errno = Connection reset by peer Actual results: Aug 11 09:09:57 bignasty rpc.mountd[3785]: Version 1.2.3 starting Aug 11 09:12:22 bignasty rpc.mountd[3785]: authenticated mount request from <client_ip>:873 for /san_disk (/san_disk) Aug 11 09:12:48 bignasty rpc.mountd[3785]: authenticated unmount request from <client_ip>:1023 for /san_disk (/san_disk) Aug 11 09:13:11 bignasty kernel: __ratelimit: 414 callbacks suppressed Aug 11 09:13:11 bignasty kernel: rpc.mountd[3785] general protection ip:7f886cfc886f sp:7fff57180fd8 error:0 in libc-2.12.so[7f886cea2000+187000] Aug 11 09:13:11 bignasty abrt[4065]: saved core dump of pid 3785 (/usr/sbin/rpc.mountd) to /var/spool/abrt/ccpp-1313068391-3785.new/coredump (761856 bytes) Aug 11 09:13:11 bignasty abrtd: Directory 'ccpp-1313068391-3785' creation detected Aug 11 09:13:11 bignasty abrtd: Crash is in database already (dup of /var/spool/abrt/ccpp-1313021207-29619) Aug 11 09:13:11 bignasty abrtd: Deleting crash ccpp-1313068391-3785 (dup of ccpp-1313021207-29619), sending dbus signal Expected results: no segfault, and command exists cleanly.