blkdev_writepages+0x12c/0x1b0 block/fops.c:487
 do_writepages+0x32e/0x550 mm/page-writeback.c:2571
 filemap_writeback mm/filemap.c:388 [inline]
 filemap_fdatawrite_range mm/filemap.c:413 [inline]
 filemap_write_and_wait_range+0x335/0x3f0 mm/filemap.c:685
 filemap_write_and_wait include/linux/pagemap.h:65 [inline]
 sync_blockdev block/bdev.c:276 [inline]
 set_blocksize+0x260/0x440 block/bdev.c:206
 blkdev_bszset+0x1b2/0x230 block/ioctl.c:640
------------[ cut here ]------------
kernel BUG at mm/filemap.c:860!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 10003 Comm: syz.2.916 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__filemap_add_folio+0x11bc/0x1330 mm/filemap.c:859
Code: 2c c3 ff 4c 89 e7 48 c7 c6 20 b6 d7 8b e8 4c 84 25 ff 90 0f 0b e8 04 2c c3 ff 4c 89 e7 48 c7 c6 80 aa d7 8b e8 35 84 25 ff 90 <0f> 0b e8 ed 2b c3 ff 4c 89 e7 48 c7 c6 20 b6 d7 8b e8 1e 84 25 ff
RSP: 0018:ffffc90002e4e8e0 EFLAGS: 00010246
RAX: e113851acce69600 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff8dfacebe RDI: 00000000ffffffff
RBP: ffffc90002e4ea60 R08: ffffffff9030d6f7 R09: 1ffffffff2061ade
R10: dffffc0000000000 R11: fffffbfff2061adf R12: ffffea000145a040
R13: dffffc0000000000 R14: ffffea000145a048 R15: 0000000000000002
FS:  00007fac6753d6c0(0000) GS:ffff888125287000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000083c0 CR3: 0000000052374000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 filemap_add_folio+0x264/0x530 mm/filemap.c:967
 ra_alloc_folio mm/readahead.c:456 [inline]
 page_cache_ra_order+0x6a9/0xe80 mm/readahead.c:515
 do_sync_mmap_readahead+0x6ad/0x8e0 mm/filemap.c:3406
 filemap_fault+0x703/0x1300 mm/filemap.c:3555
 __do_fault+0x138/0x2a0 mm/memory.c:5474
 do_read_fault mm/memory.c:5909 [inline]
 do_fault mm/memory.c:6043 [inline]
 do_pte_missing+0x2093/0x33f0 mm/memory.c:4566
 handle_pte_fault mm/memory.c:6427 [inline]
 __handle_mm_fault mm/memory.c:6565 [inline]
 handle_mm_fault+0x1bd9/0x3170 mm/memory.c:6734
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x1683/0x2720 mm/gup.c:1428
 __get_user_pages_locked mm/gup.c:1692 [inline]
 __gup_longterm_locked+0xdcf/0x1630 mm/gup.c:2476
 gup_fast_fallback+0x1d84/0x20d0 mm/gup.c:3209
 iov_iter_extract_user_pages lib/iov_iter.c:1763 [inline]
 iov_iter_extract_pages+0x37b/0x5f0 lib/iov_iter.c:1826
 iov_iter_extract_bvecs+0xb1/0x920 lib/iov_iter.c:1917
 bio_iov_iter_get_pages+0x346/0x930 block/bio.c:1266
 blkdev_iov_iter_get_pages block/fops.c:49 [inline]
 __blkdev_direct_IO+0x677/0xfa0 block/fops.c:219
 blkdev_direct_IO+0x121a/0x1790 block/fops.c:436
 blkdev_direct_write+0x7c/0x140 block/fops.c:722
 blkdev_write_iter+0x547/0x710 block/fops.c:790
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61d/0xb90 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fac6659ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fac6753d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fac66815fa0 RCX: 00007fac6659ce59
RDX: 00000000fffffd86 RSI: 0000200000000000 RDI: 0000000000000004
RBP: 00007fac6753d090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fac66816038 R14: 00007fac66815fa0 R15: 00007fffdc7fa438
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0x11bc/0x1330 mm/filemap.c:859
Code: 2c c3 ff 4c 89 e7 48 c7 c6 20 b6 d7 8b e8 4c 84 25 ff 90 0f 0b e8 04 2c c3 ff 4c 89 e7 48 c7 c6 80 aa d7 8b e8 35 84 25 ff 90 <0f> 0b e8 ed 2b c3 ff 4c 89 e7 48 c7 c6 20 b6 d7 8b e8 1e 84 25 ff
RSP: 0018:ffffc90002e4e8e0 EFLAGS: 00010246
RAX: e113851acce69600 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff8dfacebe RDI: 00000000ffffffff
RBP: ffffc90002e4ea60 R08: ffffffff9030d6f7 R09: 1ffffffff2061ade
R10: dffffc0000000000 R11: fffffbfff2061adf R12: ffffea000145a040
R13: dffffc0000000000 R14: ffffea000145a048 R15: 0000000000000002
FS:  00007fac6753d6c0(0000) GS:ffff888125287000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdee0bff14 CR3: 0000000052374000 CR4: 0000000000350ef0