git: c7975edd99b7 - stable/14 - sendfile: Explicitly ignore errors from copyout()

The branch stable/14 has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=c7975edd99b7b47b5a8e4112b3494d1c5bac96dc

commit c7975edd99b7b47b5a8e4112b3494d1c5bac96dc
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2023-12-26 01:41:32 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2024-01-02 00:29:51 +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 41f456d67e5b..f2d66cf74b2b 100644
--- a/sys/compat/freebsd32/freebsd32_misc.c
+++ b/sys/compat/freebsd32/freebsd32_misc.c
@@ -2195,7 +2195,7 @@ 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 dfdf01f45e34..f6f6b57adfc7 100644
--- a/sys/kern/kern_sendfile.c
+++ b/sys/kern/kern_sendfile.c
@@ -1328,7 +1328,7 @@ 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);