[NFS-Ganesha-Devel] Re: [EXTERNAL] Re: Ganesha logging segfault

20 Jul 2020


      It looks like you have a bad facility in the active_facility_list?  I'm 
not sure how this could happen, though.  What's your config?

Daniel

On 7/17/20 3:36 PM, Becker, Jeffrey C. (ARC-TN)[InuTeq, LLC] via Devel 
wrote:
...
My bad - I added the format string to get a slightly different traceback below (as I explained to Frank Filz, I originally had the call you suggest without errstr, and got pretty much the same segfault). I'll keep exploring in gdb. Advice appreciated. Thanks.
-Jeff
Program received signal SIGSEGV, Segmentation fault.
0x00002aaaaad43cac in display_log_component_level (component=COMPONENT_NFS_V4,
     file=0x2aaaaae4d5f8 "/mnt/nbnfs2/jcbecker/reexporter/nfs-ganesha/src/uidmap/uidmap.c", line=519, function=0x2aaaaae4d7fb <__func__.18797> "um_load",
     level=NIV_WARN, format=0x2aaaaae4d7ed "%s", arguments=0x7fffffff2718)
     at /mnt/nbnfs2/jcbecker/reexporter/nfs-ganesha/src/log/log_functions.c:1519
1519			if (level <= facility->lf_max_level
(gdb) where
#0  0x00002aaaaad43cac in display_log_component_level (
     component=COMPONENT_NFS_V4,
     file=0x2aaaaae4d5f8 "/mnt/nbnfs2/jcbecker/reexporter/nfs-ganesha/src/uidmap/uidmap.c", line=519, function=0x2aaaaae4d7fb <__func__.18797> "um_load",
     level=NIV_WARN, format=0x2aaaaae4d7ed "%s", arguments=0x7fffffff2718)
     at /mnt/nbnfs2/jcbecker/reexporter/nfs-ganesha/src/log/log_functions.c:1519
#1  0x00002aaaaad43dfe in DisplayLogComponentLevel (
     component=COMPONENT_NFS_V4,
     file=0x2aaaaae4d5f8 "/mnt/nbnfs2/jcbecker/reexporter/nfs-ganesha/src/uidmap/uidmap.c", line=519, function=0x2aaaaae4d7fb <__func__.18797> "um_load",
     level=NIV_WARN, format=0x2aaaaae4d7ed "%s")
     at /mnt/nbnfs2/jcbecker/reexporter/nfs-ganesha/src/log/log_functions.c:1704
#2  0x000
On 7/17/20, 11:42 AM, "Daniel Gryniewicz" <dang@redhat.com> wrote:
LogWarn() (and the others like it) are printf-alikes, so they need a
     format parameter.  It would be called like this:
LogWarn(COMPONENT_NFS_V4, "%s", errstr);
But, you don't need the errstr at all, you can just call like this:
LogWarn(COMPONENT_NFS_V4, "Invalid map: %s: %s", clue, line);
Daniel
On 7/17/20 12:52 PM, Becker, Jeffrey C. (ARC-TN)[InuTeq, LLC] via Devel
     wrote:
     > Hi,
     >
     > I’m trying to call your logging as follows:
     >
     >                  sprintf(errstr, "Invalid map: %s: %s", clue, line);
     >
     >                  LogWarn(COMPONENT_NFS_V4, errstr);
     >
     > I’m getting a segfault in LogWarn.
     >
     > Program received signal SIGSEGV, Segmentation fault.
     >
     > 0x00002aaaaad43ca4 in display_log_component_level
     > (component=COMPONENT_NFS_V4,
     >
     >      file=0x2aaaaae4d5d8
     > "/mnt/nbnfs2/jcbecker/reexporter/nfs-ganesha/src/uidmap/uidmap.c",
     > line=519, function=0x2aaaaae4d7d8 <__func__.18797> "um_load",
     >
     >      level=NIV_WARN,
     >
     >      format=0x7fffffffc470 "Invalid map: unknown_user: dataset:
     > 129.99.10.111 \t21102:61856 dataset n1856", arguments=0x7fffffff2718)
     >
     >      at
     > /mnt/nbnfs2/jcbecker/reexporter/nfs-ganesha/src/log/log_functions.c:1519
     >
     > 1519                                      if (level <=
     > facility->lf_max_level
     >
     > The traceback is below. I’m investigating, but any advice is welcome.
     > Thanks.
     >
     > -Jeff
     >
     > (gdb) where
     >
     > #0  0x00002aaaaad43ca4 in display_log_component_level (
     >
     >      component=COMPONENT_NFS_V4,
     >
     >      file=0x2aaaaae4d5d8
     > "/mnt/nbnfs2/jcbecker/reexporter/nfs-ganesha/src/uidmap/uidmap.c",
     > line=519, function=0x2aaaaae4d7d8 <__func__.18797> "um_load",
     >
     >      level=NIV_WARN,
     >
     >      format=0x7fffffffc470 "Invalid map: unknown_user: dataset:
     > 129.99.10.111 \t21102:61856 dataset n1856", arguments=0x7fffffff2718)
     >
     >      at
     > /mnt/nbnfs2/jcbecker/reexporter/nfs-ganesha/src/log/log_functions.c:1519
     >
     > #1  0x00002aaaaad43df6 in DisplayLogComponentLevel (
     >
     >      component=COMPONENT_NFS_V4,
     >
     >      file=0x2aaaaae4d5d8
     > "/mnt/nbnfs2/jcbecker/reexporter/nfs-ganesha/src/uidmap/uidmap.c",
     > line=519, function=0x2aaaaae4d7d8 <__func__.18797> "um_load",
     >
     >      level=NIV_WARN,
     >
     >      format=0x7fffffffc470 "Invalid map: unknown_user: dataset:
     > 129.99.10.111 \t21102:61856 dataset n1856")
     >
     >      at
     > /mnt/nbnfs2/jcbecker/reexporter/nfs-ganesha/src/log/log_functions.c:1704
     >
     >
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