What Ganesha version are you seeing this in? If current, could you submit a gerrithub patch? Thanks Frank From: Krishna Harathi [mailto:krishna.harathi@arcserve.com] Sent: Wednesday, May 4, 2022 4:14 PM To: devel(a)lists.nfs-ganesha.org Subject: [NFS-Ganesha-Devel] NFS Ganesha in mdcache_avl_qp_lookup_s() Frank, Long time. We are seeing a crash shown below. After seeing the fix in this commit - https://review.gerrithub.io/c/ffilz/nfs-ganesha/+/516675, I am posting a possible fix. (gdb) where #0 0x00000000004f2a34 in avl_dirent_hk_cmpf (lhs=0x2, rhs=0x7f82ebf8b5c8) at ../../../../FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_avl.h:67 #1 0x00000000004f3d48 in avltree_do_lookup (tree=0x7f82d31bbd90, cmp_fn=0x4f2a30 <avl_dirent_hk_cmpf>, is_left=<synthetic pointer>, unbalanced=<synthetic pointer>, pparent=<synthetic pointer>, key=0x7f82ebf8b5c8) at ../../../../include/avltree.h:223 #2 avltree_inline_lookup (cmp_fn=0x4f2a30 <avl_dirent_hk_cmpf>, tree=0x7f82d31bbd90, key=0x7f82ebf8b5c8) at ../../../../include/avltree.h:244 #3 avltree_lookup (tree=0x7f82d31bbd90, key=0x7f82ebf8b5c8) at ../../../../include/avltree.h:252 #4 mdcache_avl_qp_lookup_s (entry=entry@entry=0x7f82d31bb800, name=name@entry=0x7f82c606f440 "meta.tmp", maxj=maxj@entry=1) at ../../../../FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_avl.c:779 Possible fix - diff mdcache_avl.c mdcache_avl.c.new 760a761,762 I also suggest reviewing all callers of this avltree_lookup() for potential similar problems. Comments? Regards. Krishna Harathi ____________________________________________________________________________ _________________________________ Krishna Harathi | Senior Manager - Engineering Office: 503.475.5279 | Mobile: 503.475.5279 | krishna.harathi(a)arcserve.com <mailto:krishna.harathi@arcserve.com <https://www.arcserve.com/> arcserve.com | <https://twitter.com/Arcserve> Twitter | <https://www.linkedin.com/company/arcserve/> LinkedIn | <https://www.youtube.com/user/arcserve> YouTube ____________________________________________________________________________ _________________________________ If you are not the intended recipient of this message or received it erroneously, please notify the sender and delete it, together with any attachments, and be advised that any dissemination or copying of this message is prohibited.

Yea, that sounds like it may be a good fix. Please submit a patch. Frank From: Krishna Harathi [mailto:krishna.harathi@arcserve.com] Sent: Thursday, May 5, 2022 6:30 PM To: Frank Filz <ffilzlnx(a)mindspring.com>; devel(a)lists.nfs-ganesha.org Subject: [NFS-Ganesha-Devel] Re: NFS Ganesha in mdcache_avl_qp_lookup_s() We are using 2.5.4 (very old) and planning to upgrade to the latest asap, but will take some time. In the meantime, intend to (a) have an internal fix as shown, hence need feedback if this is reasonable (b) submit a gerrithub patch of the same fix on the latest source. Regards. Krishna Harathi ____________________________________________________________________________ _________________________________ Krishna Harathi | Senior Manager - Engineering Office: 503.475.5279 | Mobile: 503.475.5279 | krishna.harathi(a)arcserve.com <mailto:krishna.harathi@arcserve.com <https://www.arcserve.com/> arcserve.com | <https://twitter.com/Arcserve> Twitter | <https://www.linkedin.com/company/arcserve/> LinkedIn | <https://www.youtube.com/user/arcserve> YouTube ____________________________________________________________________________ _________________________________ If you are not the intended recipient of this message or received it erroneously, please notify the sender and delete it, together with any attachments, and be advised that any dissemination or copying of this message is prohibited. From: Frank Filz <ffilzlnx(a)mindspring.com <mailto:ffilzlnx@mindspring.com> > Date: Thursday, May 5, 2022 at 7:20 AM To: Krishna Harathi <krishna.harathi(a)arcserve.com <mailto:krishna.harathi@arcserve.com> >, devel(a)lists.nfs-ganesha.org <mailto:devel@lists.nfs-ganesha.org> <devel(a)lists.nfs-ganesha.org <mailto:devel@lists.nfs-ganesha.org> > Subject: RE: [NFS-Ganesha-Devel] NFS Ganesha in mdcache_avl_qp_lookup_s() What Ganesha version are you seeing this in? If current, could you submit a gerrithub patch? Thanks Frank From: Krishna Harathi [mailto:krishna.harathi@arcserve.com] Sent: Wednesday, May 4, 2022 4:14 PM To: devel(a)lists.nfs-ganesha.org <mailto:devel@lists.nfs-ganesha.orgSubject: [NFS-Ganesha-Devel] NFS Ganesha in mdcache_avl_qp_lookup_s() Frank, Long time. We are seeing a crash shown below. After seeing the fix in this commit - <https://review.gerrithub.io/c/ffilz/nfs-ganesha/+/516675> https://review.gerrithub.io/c/ffilz/nfs-ganesha/+/516675, I am posting a possible fix. (gdb) where #0 0x00000000004f2a34 in avl_dirent_hk_cmpf (lhs=0x2, rhs=0x7f82ebf8b5c8) at ../../../../FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_avl.h:67 #1 0x00000000004f3d48 in avltree_do_lookup (tree=0x7f82d31bbd90, cmp_fn=0x4f2a30 <avl_dirent_hk_cmpf>, is_left=<synthetic pointer>, unbalanced=<synthetic pointer>, pparent=<synthetic pointer>, key=0x7f82ebf8b5c8) at ../../../../include/avltree.h:223 #2 avltree_inline_lookup (cmp_fn=0x4f2a30 <avl_dirent_hk_cmpf>, tree=0x7f82d31bbd90, key=0x7f82ebf8b5c8) at ../../../../include/avltree.h:244 #3 avltree_lookup (tree=0x7f82d31bbd90, key=0x7f82ebf8b5c8) at ../../../../include/avltree.h:252 #4 mdcache_avl_qp_lookup_s (entry=entry@entry=0x7f82d31bb800, name=name@entry=0x7f82c606f440 "meta.tmp", maxj=maxj@entry=1) at ../../../../FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_avl.c:779 Possible fix - diff mdcache_avl.c mdcache_avl.c.new 760a761,762 I also suggest reviewing all callers of this avltree_lookup() for potential similar problems. Comments? Regards. Krishna Harathi ____________________________________________________________________________ _________________________________ Krishna Harathi | Senior Manager - Engineering Office: 503.475.5279 | Mobile: 503.475.5279 | <mailto:krishna.harathi@arcserve.com> krishna.harathi(a)arcserve.com <https://www.arcserve.com/> arcserve.com | <https://twitter.com/Arcserve> Twitter | <https://www.linkedin.com/company/arcserve/> LinkedIn | <https://www.youtube.com/user/arcserve> YouTube ____________________________________________________________________________ _________________________________ If you are not the intended recipient of this message or received it erroneously, please notify the sender and delete it, together with any attachments, and be advised that any dissemination or copying of this message is prohibited.