author: Al Viro <viro@zeniv.linux.org.uk> 2013-10-08 09:11:48 -0400
committer: Al Viro <viro@zeniv.linux.org.uk> 2013-11-09 00:16:26 -0500
commit: 2507a4fbd48a96bc4236e584252635f8539079df
parent: 1ad67015e619ba4e0b15ed0482d464292fedf263
Commit Summary:
Diffstat:
1 file changed, 12 insertions, 5 deletions
diff --git a/fs/coredump.c b/fs/coredump.c
index 319f973bab72..2472ed9e682c 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -696,13 +696,20 @@ EXPORT_SYMBOL(dump_write);
int dump_emit(struct coredump_params *cprm, const void *addr, int nr)
{
struct file *file = cprm->file;
- if (dump_interrupted() || !access_ok(VERIFY_READ, addr, nr))
- return 0;
+ loff_t pos = file->f_pos;
+ ssize_t n;
if (cprm->written + nr > cprm->limit)
return 0;
- if (file->f_op->write(file, addr, nr, &file->f_pos) != nr)
- return 0;
- cprm->written += nr;
+ while (nr) {
+ if (dump_interrupted())
+ return 0;
+ n = vfs_write(file, addr, nr, &pos);
+ if (n <= 0)
+ return 0;
+ file->f_pos = pos;
+ cprm->written += n;
+ nr -= n;
+ }
return 1;
}
EXPORT_SYMBOL(dump_emit);