------------[ cut here ]------------ WARNING: CPU: 0 PID: 5872 at fs/iomap/apply.c:49 cpu_max_bits_warn include/linux/cpumask.h:137 [inline] WARNING: CPU: 0 PID: 5872 at fs/iomap/apply.c:49 cpumask_check include/linux/cpumask.h:144 [inline] WARNING: CPU: 0 PID: 5872 at fs/iomap/apply.c:49 cpumask_test_cpu include/linux/cpumask.h:373 [inline] WARNING: CPU: 0 PID: 5872 at fs/iomap/apply.c:49 trace_iomap_apply fs/iomap/trace.h:144 [inline] WARNING: CPU: 0 PID: 5872 at fs/iomap/apply.c:49 iomap_apply+0x652/0x880 fs/iomap/apply.c:32 Modules linked in: CPU: 1 PID: 5872 Comm: loop0 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:iomap_apply+0x652/0x880 fs/iomap/apply.c:49 Code: 08 4c 89 fa 4c 89 f6 e8 1c c7 ff ff 65 ff 0d f5 37 3a 7e 0f 85 5c fe ff ff e8 49 82 38 ff e9 52 fe ff ff 0f 0b e9 8f fa ff ff <0f> 0b 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea RSP: 0018:ffffc9000172f7f8 EFLAGS: 00010207 RAX: 0000000000000000 RBX: ffffffff889d77a0 RCX: 000000000000000c RDX: 1ffff920002e5f09 RSI: 0000000000000004 RDI: ffffc9000172f860 RBP: ffffffff80000000 R08: ffffc9000172f770 R09: ffff88802391e0bb R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001000 R13: ffffc9000172f848 R14: ffff88802b9de738 R15: ffffc9000172f8b8 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe261b1d88 CR3: 000000001e537000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __iomap_dio_rw+0x600/0x1080 fs/iomap/direct-io.c:517 iomap_dio_rw+0x9/0x30 fs/iomap/direct-io.c:605 ext4_dio_read_iter fs/ext4/file.c:77 [inline] ext4_file_read_iter+0x36c/0x500 fs/ext4/file.c:129 call_read_iter include/linux/fs.h:1895 [inline] lo_rw_aio.isra.0+0x891/0xdc0 drivers/block/loop.c:585 do_req_filebacked drivers/block/loop.c:634 [inline] loop_handle_cmd drivers/block/loop.c:2037 [inline] loop_queue_work+0xc36/0x1c30 drivers/block/loop.c:2055 kthread_worker_fn+0x2a6/0xa30 kernel/kthread.c:735 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296