quota: fix a crash by using bad regfile inode as parent

0  0x00007f1482f1f1d7 in raise () from /lib64/libc.so.6
1  0x00007f1482f208c8 in abort () from /lib64/libc.so.6
2  0x00007f1482f18146 in __assert_fail_base () from /lib64/libc.so.6
3  0x00007f1482f181f2 in __assert_fail () from /lib64/libc.so.6
4  0x00007f148484986a in __inode_link (inode=inode@entry=0x7f14742404d4,
   parent=parent@entry=0x7f14742404d4,
   name=name@entry=0x7f1460001c48 "testfile5308",
   iatt=iatt@entry=0x7f1460001bc8) at inode.c:954
5  0x00007f1484849969 in inode_link (inode=0x7f14742404d4,
   parent=parent@entry=0x7f14742404d4,
   name=name@entry=0x7f1460001c48 "testfile5308",
   iatt=iatt@entry=0x7f1460001bc8) at inode.c:1060
6  0x00007f147591b895 in quota_build_ancestry_cbk (
   frame=frame@entry=0x7f1482315e80, cookie=<optimized out>,
   this=0x7f147000e910, op_ret=op_ret@entry=6904, op_errno=op_errno@entry=0,
   entries=entries@entry=0x7f1474731c00, xdata=xdata@entry=0x0) at quota.c:779
7  0x00007f1475b2f505 in marker_build_ancestry_cbk (frame=0x7f1482315988,
   cookie=<optimized out>, this=<optimized out>, op_ret=<optimized out>,
   op_errno=<optimized out>, entries=0x7f1474731c00, xdata=0x0)
   at marker.c:3055
8  0x00007f14848b9cd9 in default_readdirp_cbk (
   frame=frame@entry=0x7f1482315b30, cookie=<optimized out>,
   this=<optimized out>, op_ret=op_ret@entry=6904, op_errno=op_errno@entry=0,
   entries=entries@entry=0x7f1474731c00, xdata=xdata@entry=0x0)
   at defaults.c:1403
9  0x00007f1475f68132 in pl_readdirp_cbk (frame=0x7f1482315dac,
   cookie=<optimized out>, this=<optimized out>, op_ret=6904, op_errno=0,
   entries=0x7f1474731c00, xdata=0x0) at posix.c:2700
10 0x00007f1476e26819 in posix_readdirp (frame=0x7f1482315f54,
   this=<optimized out>, fd=<optimized out>, size=<optimized out>,
   off=<optimized out>, dict=<optimized out>) at posix.c:6282
11 0x00007f1475f6599a in pl_readdirp (frame=0x7f1482315dac,
   this=0x7f147000a200, fd=0x7f1484b5106c, size=0, offset=0,
   xdata=0x7f1481ab4f34) at posix.c:2711
12 0x00007f14848ce954 in default_readdirp_resume (frame=0x7f1482315b30,
   this=0x7f147000b690, fd=0x7f1484b5106c, size=0, off=0,
   xdata=0x7f1481ab4f34) at defaults.c:2019
13 0x00007f148485c92d in call_resume (stub=0x7f1481b65710) at call-stub.c:2508
14 0x00007f1475d54743 in iot_worker (data=0x7f147004e7d0) at io-threads.c:210
15 0x00007f148369cdc5 in start_thread () from /lib64/libpthread.so.0
16 0x00007f1482fe173d in clone () from /lib64/libc.so.6

Change-Id: I740dc691e7be1bc2a9ae3a0cb14bbf566ea77bc5
Signed-off-by: Kinglong Mee <mijinlong@open-fs.com>
Reviewed-on: https://review.gluster.org/17730
Tested-by: Raghavendra G <rgowdapp@redhat.com>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>

1 files changed, 17 insertions, 1 deletions

diff --git a/xlators/features/marker/src/marker-quota.c b/xlators/features/marker/src/marker-quota.c
index 902b8e5c272..b4c3eb395bd 100644
--- a/xlators/features/marker/src/marker-quota.c
+++ b/xlators/features/marker/src/marker-quota.c
@@ -214,6 +214,15 @@ mq_build_ancestry (xlator_t *this, loc_t *loc)
 
         list_for_each_entry (entry, &entries.list, list) {
                 if (__is_root_gfid (entry->inode->gfid)) {
+                        /* The list contains a sub-list for each possible path
+                         * to the target inode. Each sub-list starts with the
+                         * root entry of the tree and is followed by the child
+                         * entries for a particular path to the target entry.
+                         * The root entry is an implied sub-list delimiter,
+                         * as it denotes we have started processing a new path.
+                         * Reset the parent pointer and continue
+                         */
+
                         tmp_parent = NULL;
                 } else {
                         linked_inode = inode_link (entry->inode, tmp_parent,
@@ -240,7 +249,14 @@ mq_build_ancestry (xlator_t *this, loc_t *loc)
                         goto out;
                 }
 
-                tmp_parent = entry->inode;
+                /* For non-directory, posix_get_ancestry_non_directory returns
+                 * all hard-links that are represented by nodes adjacent to
+                 * each other in the dentry-list.
+                 * (Unlike the directory case where adjacent nodes either have
+                 *  a parent/child relationship or belong to different paths).
+                 */
+                if (entry->inode->ia_type == IA_IFDIR)
+                        tmp_parent = entry->inode;
         }
 
         if (loc->parent)