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Diffstat (limited to 'erts/emulator/drivers/common')
-rw-r--r--erts/emulator/drivers/common/efile_drv.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/erts/emulator/drivers/common/efile_drv.c b/erts/emulator/drivers/common/efile_drv.c
index f24098025e..912f5d3d8b 100644
--- a/erts/emulator/drivers/common/efile_drv.c
+++ b/erts/emulator/drivers/common/efile_drv.c
@@ -206,6 +206,9 @@ dt_private *get_dt_private(int);
# define KEY(desc) (&(desc)->key)
#endif
+#ifndef MAX
+# define MAX(x, y) (((x) > (y)) ? (x) : (y))
+#endif
#ifdef FILENAMES_16BIT
#ifdef USE_VM_PROBES
@@ -2848,8 +2851,9 @@ file_output(ErlDrvData e, char* buf, ErlDrvSizeT count)
case FILE_READLINK:
{
- d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + RESBUFSIZE + 1);
-
+ d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 +
+ MAX(RESBUFSIZE, (FILENAME_BYTELEN(name) +
+ FILENAME_CHARSIZE)) + 1);
FILENAME_COPY(d->b, name);
#ifdef USE_VM_PROBES
dt_s1 = d->b;
@@ -2864,7 +2868,9 @@ file_output(ErlDrvData e, char* buf, ErlDrvSizeT count)
case FILE_ALTNAME:
{
- d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + RESBUFSIZE + 1);
+ d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 +
+ MAX(RESBUFSIZE, (FILENAME_BYTELEN(name) +
+ FILENAME_CHARSIZE)) + 1);
FILENAME_COPY(d->b, name);
#ifdef USE_VM_PROBES
dt_s1 = d->b;