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BUG: KASAN: stack-out-of-bounds in iterate_bvec include/linux/iov_iter.h:116 [inline]
BUG: KASAN: stack-out-of-bounds in __copy_from_iter_mc+0x30a/0x3f0 lib/iov_iter.c:262
Read of size 4 at addr ffffc90004d8f574 by task syz-executor.0/5417

CPU: 0 PID: 5417 Comm: syz-executor.0 Not tainted 6.6.0-rc3-next-20230929-syzkaller-08790-gdf964ce9ef9f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xc4/0x620 mm/kasan/report.c:475
 kasan_report+0xda/0x110 mm/kasan/report.c:588
 iterate_bvec include/linux/iov_iter.h:116 [inline]
 __copy_from_iter_mc+0x30a/0x3f0 lib/iov_iter.c:262
 __copy_from_iter lib/iov_iter.c:271 [inline]
 copy_page_from_iter_atomic+0x471/0x11e0 lib/iov_iter.c:504
 generic_perform_write+0x2e9/0x600 mm/filemap.c:3964
 ext4_buffered_write_iter+0x11f/0x3c0 fs/ext4/file.c:299
 ext4_file_write_iter+0x7f7/0x1860 fs/ext4/file.c:717
 __kernel_write_iter+0x261/0x7e0 fs/read_write.c:517
 dump_emit_page fs/coredump.c:888 [inline]
 dump_user_range+0x299/0x790 fs/coredump.c:915