git: 064d5d4dee05 - stable/13 - tmpfs: disallow truncation to set file size past RLIMIT_FSIZE

The branch stable/13 has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=064d5d4dee053f70ff82f9a1f98ed42e38f36b47

commit 064d5d4dee053f70ff82f9a1f98ed42e38f36b47
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2022-09-18 13:28:11 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2022-10-08 00:29:35 +0000

    tmpfs: disallow truncation to set file size past RLIMIT_FSIZE
    
    PR:     164793
    
    (cherry picked from commit b5b16659c5aceb9caa0a9b76c7746e1d12a505ce)
---
 sys/fs/tmpfs/tmpfs_subr.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/fs/tmpfs/tmpfs_subr.c b/sys/fs/tmpfs/tmpfs_subr.c
index 6c8d9bd9a0ff..f60dc81c648c 100644
--- a/sys/fs/tmpfs/tmpfs_subr.c
+++ b/sys/fs/tmpfs/tmpfs_subr.c
@@ -2045,6 +2045,10 @@ tmpfs_chsize(struct vnode *vp, u_quad_t size, struct ucred *cred,
 	if (node->tn_flags & (IMMUTABLE | APPEND))
 		return (EPERM);
 
+	error = vn_rlimit_trunc(size, td);
+	if (error != 0)
+		return (error);
+
 	error = tmpfs_truncate(vp, size);
 	/*
 	 * tmpfs_truncate will raise the NOTE_EXTEND and NOTE_ATTRIB kevents