Frank,

 

Long time.  We are seeing a crash shown below. Found this commit that addressed similar issue - 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

>     memset(&v, 0, sizeof(v));

> 

 

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@arcserve.com
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