author: Dave Kleikamp <dave.kleikamp@oracle.com> 2017-01-11 13:25:00 -0600
committer: Al Viro <viro@zeniv.linux.org.uk> 2017-01-14 19:32:40 -0500
commit: 4d22c75d4c7b5c5f4bd31054f09103ee490878fd
parent: a12f1ae61c489076a9aeb90bddca7722bf330df3
Commit Summary:
Diffstat:
1 file changed, 16 insertions, 0 deletions
diff --git a/fs/coredump.c b/fs/coredump.c
index e525b6017cdf..ae6b05629ca1 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -833,3 +833,21 @@ int dump_align(struct coredump_params *cprm, int align)
return mod ? dump_skip(cprm, align - mod) : 1;
}
EXPORT_SYMBOL(dump_align);
+
+/*
+ * Ensures that file size is big enough to contain the current file
+ * postion. This prevents gdb from complaining about a truncated file
+ * if the last "write" to the file was dump_skip.
+ */
+void dump_truncate(struct coredump_params *cprm)
+{
+ struct file *file = cprm->file;
+ loff_t offset;
+
+ if (file->f_op->llseek && file->f_op->llseek != no_llseek) {
+ offset = file->f_op->llseek(file, 0, SEEK_CUR);
+ if (i_size_read(file->f_mapping->host) < offset)
+ do_truncate(file->f_path.dentry, offset, 0, file);
+ }
+}
+EXPORT_SYMBOL(dump_truncate);