12:40 p.m.
We are getting this crash from a couple of customers (using ganesha2.5
based code with some backports!). Looks like commit
3aa8575880190d7a20946a38ae3bc70b278d1099 (see the last paragraph of
the commit message) may fix this. Did anyone see this backtrace
before, if so what fixed it?
(gdb) bt
#0 0x00007fd511af64ab in raise () from /lib64/libpthread.so.0
#1 0x0000000000455447 in crash_handler (signo=11,
info=0x7fd47bef47f0, ctx=0x7fd47bef46c0)
at /usr/src/debug/nfs-ganesha-2.5.3-ibm028.00-0.1.1-Source/MainNFSD/nfs_init.c:225
#2 <signal handler called>
#3 0x000000000054fecf in mdcache_readdir_chunked
(directory=0x7fd1697a6c80, whence=0,
dir_state=0x7fd47bef57c0, cb=0x4330f3 <populate_dirent>,
attrmask=122830, eod_met=0x7fd47bef5e9b)
at
/usr/src/debug/nfs-ganesha-2.5.3-ibm028.00-0.1.1-Source/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:2971
#4 0x000000000053f44c in mdcache_readdir (dir_hdl=0x7fd1697a6cb8,
whence=0x7fd47bef57a0,
dir_state=0x7fd47bef57c0, cb=0x4330f3 <populate_dirent>,
attrmask=122830, eod_met=0x7fd47bef5e9b)
at
/usr/src/debug/nfs-ganesha-2.5.3-ibm028.00-0.1.1-Source/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_handle.c:639
#5 0x00000000004339aa in fsal_readdir (directory=0x7fd1697a6cb8,
cookie=0, nbfound=0x7fd47bef5e9c,
eod_met=0x7fd47bef5e9b, attrmask=122830, cb=0x496a1a
<nfs3_readdirplus_callback>, opaque=0x7fd47bef5e50)
at /usr/src/debug/nfs-ganesha-2.5.3-ibm028.00-0.1.1-Source/FSAL/fsal_helper.c:1497
#6 0x000000000049680d in nfs3_readdirplus (arg=0x7fd1ed2071d0,
req=0x7fd1ed2069c8, res=0x7fd1589bd3d0)
at
/usr/src/debug/nfs-ganesha-2.5.3-ibm028.00-0.1.1-Source/Protocols/NFS/nfs3_readdirplus.c:309
#7 0x000000000044cc86 in nfs_rpc_execute (reqdata=0x7fd1ed2069a0)
at
/usr/src/debug/nfs-ganesha-2.5.3-ibm028.00-0.1.1-Source/MainNFSD/nfs_worker_thread.c:1290
#8 0x000000000044d490 in worker_run (ctx=0x4029b20)
at
/usr/src/debug/nfs-ganesha-2.5.3-ibm028.00-0.1.1-Source/MainNFSD/nfs_worker_thread.c:1562
#9 0x000000000050c4b0 in fridgethr_start_routine (arg=0x4029b20)
at /usr/src/debug/nfs-ganesha-2.5.3-ibm028.00-0.1.1-Source/support/fridgethr.c:550
#10 0x00007fd511aeee25 in start_thread () from /lib64/libpthread.so.0
#11 0x00007fd5111af34d in clone () from /lib64/libc.so.6
(gdb) frame 3
#3 0x000000000054fecf in mdcache_readdir_chunked
(directory=0x7fd1697a6c80, whence=0,
dir_state=0x7fd47bef57c0, cb=0x4330f3 <populate_dirent>,
attrmask=122830, eod_met=0x7fd47bef5e9b)
at
/usr/src/debug/nfs-ganesha-2.5.3-ibm028.00-0.1.1-Source/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:2971
2971 if (dirent->ck == whence) {
(gdb) p dirent
$1 = (mdcache_dir_entry_t *) 0x1e58408900000000
(gdb) p dirent->ck
Cannot access memory at address 0x1e58408900000060
(gdb) l
2966 fsal_status_t status;
2967 enum fsal_dir_result cb_result;
2968 mdcache_entry_t *entry = NULL;
2969 struct attrlist attrs;
2970
2971 if (dirent->ck == whence) {
2972 /* When called with whence, the caller always wants the
2973 * next entry, skip this entry.
2974 */
2975 continue;