kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 2077 Comm: syz-executor177 Not tainted 4.4.174+ #17 task: ffff8801d4d48000 task.stack: ffff8800b72d8000 RIP: 0010:[] [] __read_once_size include/linux/compiler.h:218 [inline] RIP: 0010:[] [] PageTail include/linux/page-flags.h:400 [inline] RIP: 0010:[] [] get_page include/linux/mm.h:508 [inline] RIP: 0010:[] [] submit_page_section fs/direct-io.c:813 [inline] RIP: 0010:[] [] do_direct_IO fs/direct-io.c:1033 [inline] RIP: 0010:[] [] do_blockdev_direct_IO fs/direct-io.c:1256 [inline] RIP: 0010:[] [] __blockdev_direct_IO+0x36ea/0xb030 fs/direct-io.c:1342 RSP: 0018:ffff8800b72df200 EFLAGS: 00010202 RAX: 0000000000000004 RBX: dffffc0000000000 RCX: 000000000000000c RDX: 0000000000000000 RSI: ffffffff81557477 RDI: 0000000000000020 RBP: ffff8800b72df518 R08: 1ffff10016fe59c0 R09: ffff8800b7f2ce00 R10: ffffed0016fe59ce R11: ffff8800b7f2ce77 R12: ffffea0002dae400 R13: ffff8800b7f2ce00 R14: ffff8801da266780 R15: ffff8800b6b50000 FS: 0000000000000000(0000) GS:ffff8801db700000(0063) knlGS:0000000008ea2840 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000200110ff CR3: 00000000b7fc2000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: fffffbfff05c2202 ffff8800b72df310 0005080000000000 0000000000001000 0000000000008220 ffff8800b6b50079 0000000041b58ab3 0000000000011000 ffff8800b72df360 00001000d4d488c0 fffffffffffff000 0000000000000fff Call Trace: [] blockdev_direct_IO include/linux/fs.h:2789 [inline] [] ext4_ind_direct_IO+0x3e1/0xb90 fs/ext4/indirect.c:709 [] ext4_ext_direct_IO fs/ext4/inode.c:3233 [inline] [] ext4_direct_IO+0x8c1/0x2a80 fs/ext4/inode.c:3405 [] generic_file_direct_write+0x276/0x4f0 mm/filemap.c:2493 [] __generic_file_write_iter+0x245/0x540 mm/filemap.c:2673 [] ext4_file_write_iter+0x9ec/0xc70 fs/ext4/file.c:171 [] vfs_iter_write+0x1d0/0x3f0 fs/read_write.c:364 [] iter_file_splice_write+0x5c1/0xb30 fs/splice.c:1024 [] do_splice_from fs/splice.c:1128 [inline] [] do_splice fs/splice.c:1404 [inline] [] SYSC_splice fs/splice.c:1707 [inline] [] SyS_splice+0xd71/0x13a0 fs/splice.c:1690 [] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] [] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397 [] sysenter_flags_fixed+0xd/0x1a Code: 00 00 e8 aa a9 e8 ff 48 c7 84 24 50 02 00 00 00 00 00 00 e8 79 21 db ff 48 8b 84 24 c8 00 00 00 48 8d 78 20 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 10 5b 00 00 48 8b 84 24 c8 00 00 00 48 8b 40 RIP [] __read_once_size include/linux/compiler.h:218 [inline] RIP [] PageTail include/linux/page-flags.h:400 [inline] RIP [] get_page include/linux/mm.h:508 [inline] RIP [] submit_page_section fs/direct-io.c:813 [inline] RIP [] do_direct_IO fs/direct-io.c:1033 [inline] RIP [] do_blockdev_direct_IO fs/direct-io.c:1256 [inline] RIP [] __blockdev_direct_IO+0x36ea/0xb030 fs/direct-io.c:1342 RSP ---[ end trace e55d8d41e8bdb80d ]---