vfs: abort dedupe loop if fatal signals are pending

If the program running dedupe receives a fatal signal during the
dedupe loop, we should bail out to avoid tying up the system.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/read_write.c b/fs/read_write.c
index fa05985f700e511e2f8da109153f86e0072ee03a..324ec271cc4e64868c34e3ff2f28ac2c0542475e 100644 (file)
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1656,6 +1656,9 @@ next_file:
                mnt_drop_write_file(dst_file);
 next_loop:
                fdput(dst_fd);
+
+               if (fatal_signal_pending(current))
+                       goto out;
        }
 
 out: