git: d89317a66ff7 - stable/13 - Add a regression test for PR 276191.

The branch stable/13 has been updated by asomers:

URL: https://cgit.FreeBSD.org/src/commit/?id=d89317a66ff7874c9c04461739d7546e3042c0ad

commit d89317a66ff7874c9c04461739d7546e3042c0ad
Author:     Alan Somers <asomers@FreeBSD.org>
AuthorDate: 2024-01-08 01:03:40 +0000
Commit:     Alan Somers <asomers@FreeBSD.org>
CommitDate: 2024-01-19 20:27:09 +0000

    Add a regression test for PR 276191.
    
    The bug isn't fusefs-specific, but this is the easiest way to reproduce
    it.
    
    PR:             276191
    MFC with:       bdb46c21a3e68d4395d6e0b6a205187e655532b0
    Differential Revision:  https://reviews.freebsd.org/D43446
    Reviewed by:    kib
    
    (cherry picked from commit 6b1c534927ad47e9b0dd8be1a39f56c3ea813d44)
---
 tests/sys/fs/fusefs/io.cc | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tests/sys/fs/fusefs/io.cc b/tests/sys/fs/fusefs/io.cc
index 340c54f0c949..3c14621f0b66 100644
--- a/tests/sys/fs/fusefs/io.cc
+++ b/tests/sys/fs/fusefs/io.cc
@@ -507,6 +507,16 @@ TEST_P(Io, resize_a_valid_buffer_while_extending)
 	close(m_test_fd);
 }
 
+/*
+ * mmap of a suitable region could trigger a panic.  I'm not sure what
+ * combination of size and offset counts as "suitable".  Regression test for
+ * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276191
+ */
+TEST_P(IoCacheable, vnode_pager_generic_putpage_clean_block_at_eof)
+{
+	do_mapwrite(0x1bbc3, 0x3b4e0);
+}
+
 INSTANTIATE_TEST_CASE_P(Io, Io,
 	Combine(Bool(),					/* async read */
 		Values(0x1000, 0x10000, 0x20000),	/* m_maxwrite */