Comments (3)
Additional testing indicates that the buffer overflow occurs when the full path (less the leaf node) is 125 visible characters. (There are also some new line characters, thus the total output message exceeds 128 characters.)
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Investigation reveals that there are two bugs in the tcl/tcl_directory.c
file.
The buffer overflow occurs when the path length (plus new line characters) exceeds the msg
buffer size. This buffer should be increased in both branches: alpha and mdsplus8.
line 177
In the mdsplus8 branch, there is an additional problem because the node name size is specified incorrectly. The node names only have 63 visible characters (i.e., the trailing null character should not be included).
line 133
line 138
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Clarification: IMAS and OMAS are abstraction layers above MDSplus and other data stores. Thus, it is unlikely that full IMAS and OMAS paths will be mirrored directly in MDSplus.
However, when designing new MDSplus trees, it is possible that some nodes in the tree will use similar names in order to simplify the mapping from MDSplus to IMAS / OMAS. Thus, those new trees will likely encounter this mdstcl
buffer overflow bug.
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Related Issues (20)
- Activating the `MDSDBG()` debug statements generates compiler errors
- Building on conda forge OSX fails HOT 12
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- Missing "mdsobjectscppshr-vs.lib" in vs devtools lib32 folder HOT 6
- Some calling routines do not properly handle SsINTERNAL, C_ERROR, and/or FALSE returned by low-level routines HOT 4
- alpha versions fail to raise MDSconnection issue HOT 8
- Mdstcl segfaults for a tree that doesn't carry a shot number HOT 2
- The information and links in `mdstcl show version` are out of date
- RW on mds+ shotfiles for "group" in linux HOT 5
- NFSLOCKING problem - non reproducible HOT 11
- Is it possible to limit the amount of concurrent connections of a specific user HOT 3
- Have TCL's `show version` command also display the build date HOT 1
- In `tdi/RfxDevices/DIO2` initialization, remove the flag that triggers a TDI `abort()` on a failed connection HOT 1
- Error reporting when using function mdsvalue in Matlab which version——stable_release-7-142-80 HOT 14
- Source repo contains obsolete public key for RPM packages HOT 2
- Wrong number of child nodes in python TreeNode.getChildren()
- add timestamps, client ip & name, pid to mdsip error logs, equivalent to "access" logs HOT 1
- assign priorities to incoming mdsip connections HOT 1
- intermittent failure to connect to MDSplus server HOT 2
- enable linking MDSplus to custom python conda environments, and NOT system-wide python HOT 2
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