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| author | Peter Eisentraut <peter@eisentraut.org> | 2024-05-03 11:10:40 +0200 |
|---|---|---|
| committer | Peter Eisentraut <peter@eisentraut.org> | 2024-05-03 11:10:40 +0200 |
| commit | 8f0a97dfffc5b5f48f609fb894befcdf761dd576 (patch) | |
| tree | 25161b8b081bd79a69db9b8b5dde904bbb2ac08a /src/backend/commands/tablecmds.c | |
| parent | 91e7115b177b0523f9757574b8a329ebe10c0af7 (diff) | |
| download | postgresql-8f0a97dfffc5b5f48f609fb894befcdf761dd576.tar.gz postgresql-8f0a97dfffc5b5f48f609fb894befcdf761dd576.zip | |
Fix segmentation fault in MergeInheritedAttribute()
While converting a pg_attribute tuple into a ColumnDef,
ColumnDef::compression remains NULL if there is no compression method
set fot the attribute. Calling strcmp() with NULL
ColumnDef::compression, when comparing compression methods of parents,
causes segmentation fault in MergeInheritedAttribute(). Skip
comparing compression methods if either of them is NULL.
Author: Ashutosh Bapat <ashutosh.bapat@enterprisedb.com>
Reported-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://www.postgresql.org/message-id/b22a6834-aacb-7b18-0424-a3f5fe889667%40gmail.com
Diffstat (limited to 'src/backend/commands/tablecmds.c')
| -rw-r--r-- | src/backend/commands/tablecmds.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c index 3309332f1ae..a79ac884f7c 100644 --- a/src/backend/commands/tablecmds.c +++ b/src/backend/commands/tablecmds.c @@ -3432,12 +3432,16 @@ MergeInheritedAttribute(List *inh_columns, */ if (prevdef->compression == NULL) prevdef->compression = newdef->compression; - else if (strcmp(prevdef->compression, newdef->compression) != 0) - ereport(ERROR, - (errcode(ERRCODE_DATATYPE_MISMATCH), - errmsg("column \"%s\" has a compression method conflict", - attributeName), - errdetail("%s versus %s", prevdef->compression, newdef->compression))); + else if (newdef->compression != NULL) + { + if (strcmp(prevdef->compression, newdef->compression) != 0) + ereport(ERROR, + (errcode(ERRCODE_DATATYPE_MISMATCH), + errmsg("column \"%s\" has a compression method conflict", + attributeName), + errdetail("%s versus %s", + prevdef->compression, newdef->compression))); + } /* * Check for GENERATED conflicts |