gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 78ms
gfs2: fsid=syz:syz.0: jid=0: Done
Process accounting resumed
==================================================================
BUG: KASAN: stack-out-of-bounds in should_fault_in_pages fs/gfs2/file.c:785 [inline]
BUG: KASAN: stack-out-of-bounds in gfs2_file_buffered_write+0x576/0x900 fs/gfs2/file.c:1070
Read of size 8 at addr ffffc90000cc7990 by task kworker/0:0/7

CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: events close_work
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 print_address_description+0x60/0x2d0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xdf/0x130 mm/kasan/report.c:451
 should_fault_in_pages fs/gfs2/file.c:785 [inline]
 gfs2_file_buffered_write+0x576/0x900 fs/gfs2/file.c:1070
 gfs2_file_write_iter+0x467/0x11d0 fs/gfs2/file.c:1166
 __kernel_write+0x4f9/0x930 fs/read_write.c:539
 acct_write_process+0x431/0x840 kernel/acct.c:544
 close_work+0x45/0xc0 kernel/acct.c:195
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>


addr ffffc90000cc7990 is located in stack of task kworker/0:0/7 at offset 48 in frame:
 __kernel_write+0x0/0x930

this frame has 3 objects:
 [32, 48) 'iov'
 [64, 112) 'kiocb'
 [144, 184) 'iter'

Memory state around the buggy address:
 ffffc90000cc7880: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90000cc7900: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
>ffffc90000cc7980: 00 00 f2 f2 00 00 00 00 00 00 f2 f2 f2 f2 00 00
                         ^
 ffffc90000cc7a00: 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00
 ffffc90000cc7a80: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
==================================================================