git: 3aa79121f2b8 - stable/13 - sendfile: Explicitly ignore errors from copyout()

The branch stable/13 has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=3aa79121f2b8cb070ea9b8a89e6ca8ca967a16f5

commit 3aa79121f2b8cb070ea9b8a89e6ca8ca967a16f5
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2023-12-26 01:41:32 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2024-01-02 01:12:45 +0000

    sendfile: Explicitly ignore errors from copyout()
    
    There is a documented bug in sendfile.2 which notes that sendfile(2)
    does not raise an error if it fails to copy out the number of bytes
    written.  Explicitly ignore the error from copyout() calls in
    preparation for annotating copyout() with __result_use_check.
    
    Reviewed by:    glebius, kib
    MFC after:      1 week
    Differential Revision:  https://reviews.freebsd.org/D43129
    
    (cherry picked from commit d0adc2f283ad5db6b568ca533a056c9f635551cd)
---
 sys/compat/freebsd32/freebsd32_misc.c | 2 +-
 sys/kern/kern_sendfile.c              | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/compat/freebsd32/freebsd32_misc.c b/sys/compat/freebsd32/freebsd32_misc.c
index cd6a4c2dc3df..ee0119dba5af 100644
--- a/sys/compat/freebsd32/freebsd32_misc.c
+++ b/sys/compat/freebsd32/freebsd32_misc.c
@@ -2148,7 +2148,7 @@ freebsd32_do_sendfile(struct thread *td,
 	fdrop(fp, td);
 
 	if (uap->sbytes != NULL)
-		copyout(&sbytes, uap->sbytes, sizeof(off_t));
+		(void)copyout(&sbytes, uap->sbytes, sizeof(off_t));
 
 out:
 	if (hdr_uio)
diff --git a/sys/kern/kern_sendfile.c b/sys/kern/kern_sendfile.c
index 8b7a2e7e0ce7..2a34a34067d1 100644
--- a/sys/kern/kern_sendfile.c
+++ b/sys/kern/kern_sendfile.c
@@ -1326,7 +1326,7 @@ sendfile(struct thread *td, struct sendfile_args *uap, int compat)
 	fdrop(fp, td);
 
 	if (uap->sbytes != NULL)
-		copyout(&sbytes, uap->sbytes, sizeof(off_t));
+		(void)copyout(&sbytes, uap->sbytes, sizeof(off_t));
 
 out:
 	free(hdr_uio, M_IOV);