+ ocfs2-check-new-file-size-on-fallocate-call.patch added to mm-nonmm-unstable branch

Commit Message

Andrew Morton May 31, 2023, 10:14 p.m. UTC

The patch titled
     Subject: ocfs2: check new file size on fallocate call
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     ocfs2-check-new-file-size-on-fallocate-call.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ocfs2-check-new-file-size-on-fallocate-call.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Luís Henriques <[e-mail]>
Subject: ocfs2: check new file size on fallocate call
Date: Mon, 29 May 2023 16:26:45 +0100

When changing a file size with fallocate() the new size isn't being
checked.  In particular, the FSIZE ulimit isn't being checked, which makes
fstest generic/228 fail.  Simply adding a call to inode_newsize_ok() fixes
this issue.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Luís Henriques <[e-mail]>
Reviewed-by: Mark Fasheh <[e-mail]>
Reviewed-by: Joseph Qi <[e-mail]>
Cc: Joel Becker <[e-mail]>
Cc: Junxiao Bi <[e-mail]>
Cc: Changwei Ge <[e-mail]>
Cc: Gang He <[e-mail]>
Cc: Jun Piao <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 fs/ocfs2/file.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Patch

--- a/fs/ocfs2/file.c~ocfs2-check-new-file-size-on-fallocate-call
+++ a/fs/ocfs2/file.c
@@ -2100,14 +2100,20 @@  static long ocfs2_fallocate(struct file
 	struct ocfs2_space_resv sr;
 	int change_size = 1;
 	int cmd = OCFS2_IOC_RESVSP64;
+	int ret = 0;
 
 	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
 		return -EOPNOTSUPP;
 	if (!ocfs2_writes_unwritten_extents(osb))
 		return -EOPNOTSUPP;
 
-	if (mode & FALLOC_FL_KEEP_SIZE)
+	if (mode & FALLOC_FL_KEEP_SIZE) {
 		change_size = 0;
+	} else {
+		ret = inode_newsize_ok(inode, offset + len);
+		if (ret)
+			return ret;
+	}
 
 	if (mode & FALLOC_FL_PUNCH_HOLE)
 		cmd = OCFS2_IOC_UNRESVSP64;