diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2018-12-10 11:12:43 -0500 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2018-12-10 11:12:43 -0500 |
| commit | e60122b54daf6f0e93162161b41ecb9ab4655fa5 (patch) | |
| tree | 5db10e020194c4ec6108f2d44d0c1dbd146be086 /src/backend/nodes/equalfuncs.c | |
| parent | 9eaba23c414d9da1e767e1af0a80cb687dc358e2 (diff) | |
Add stack depth checks to key recursive functions in backend/nodes/*.c.
Although copyfuncs.c has a check_stack_depth call in its recursion,
equalfuncs.c, outfuncs.c, and readfuncs.c lacked one. This seems
unwise.
Likewise fix planstate_tree_walker(), in branches where that exists.
Discussion: https://postgr.es/m/30253.1544286631@sss.pgh.pa.us
Diffstat (limited to 'src/backend/nodes/equalfuncs.c')
| -rw-r--r-- | src/backend/nodes/equalfuncs.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/backend/nodes/equalfuncs.c b/src/backend/nodes/equalfuncs.c index c5bb817ba19..c566eb9b257 100644 --- a/src/backend/nodes/equalfuncs.c +++ b/src/backend/nodes/equalfuncs.c @@ -29,6 +29,7 @@ #include "postgres.h" +#include "miscadmin.h" #include "nodes/extensible.h" #include "nodes/relation.h" #include "utils/datum.h" @@ -2978,6 +2979,9 @@ equal(const void *a, const void *b) if (nodeTag(a) != nodeTag(b)) return false; + /* Guard against stack overflow due to overly complex expressions */ + check_stack_depth(); + switch (nodeTag(a)) { /* |