random: sshd: uninitialized urandom read (32 bytes read)
audit: type=1400 audit(1570246628.764:7): avc:  denied  { map } for  pid=1790 comm="syz-executor684" path="/root/syz-executor684134571" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 0 PID: 1790 Comm: syz-executor684 Not tainted 4.14.146+ #0
task:         (ptrval) task.stack:         (ptrval)
RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline]
RIP: 0010:compound_head include/linux/page-flags.h:148 [inline]
RIP: 0010:get_page include/linux/mm.h:836 [inline]
RIP: 0010:submit_page_section fs/direct-io.c:890 [inline]
RIP: 0010:do_direct_IO fs/direct-io.c:1097 [inline]
RIP: 0010:do_blockdev_direct_IO fs/direct-io.c:1336 [inline]
RIP: 0010:__blockdev_direct_IO+0x1dcf/0xe24e fs/direct-io.c:1422
RSP: 0018:ffff8881cbbe7330 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffffea00072fe41c RCX: ffffffffac638603
RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000000000020
RBP: ffff8881cbbe7668 R08: 0000000000000000 R09: fffff94000e5fc84
R10: fffff94000e5fc83 R11: ffffea00072fe41f R12: ffffea00072fe400
R13: ffffea00072fe400 R14: 0000000000000000 R15: ffff8881cbf50000
FS:  00005555566f2880(0000) GS:ffff8881d7400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020011000 CR3: 00000001cbe20001 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_direct_IO_write fs/ext4/inode.c:3715 [inline]
 ext4_direct_IO+0xa4f/0x2820 fs/ext4/inode.c:3868
 generic_file_direct_write+0x1e4/0x430 mm/filemap.c:3035
 __generic_file_write_iter+0x209/0x550 mm/filemap.c:3214
 ext4_file_write_iter+0x58f/0xdb0 fs/ext4/file.c:268
 call_write_iter include/linux/fs.h:1788 [inline]
 do_iter_readv_writev+0x379/0x580 fs/read_write.c:679
 do_iter_write fs/read_write.c:958 [inline]
 do_iter_write+0x152/0x550 fs/read_write.c:939
 vfs_iter_write+0x70/0xa0 fs/read_write.c:971
 iter_file_splice_write+0x560/0xa50 fs/splice.c:749
 do_splice_from fs/splice.c:851 [inline]
 do_splice fs/splice.c:1147 [inline]
 SYSC_splice fs/splice.c:1402 [inline]
 SyS_splice+0xcd6/0x1270 fs/splice.c:1382
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4402f9
RSP: 002b:00007fff1dbd9db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402f9
RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000006ca018 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b80
R13: 0000000000401c10 R14: 0000000000000000 R15: 0000000000000000
Code: ec ad e8 85 69 e9 ff 0f 0b e8 0e bc cd ff 48 8b 84 24 e8 00 00 00 48 8d 78 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 37 a0 00 00 48 8b 84 24 e8 00 00 00 4c 8b 60 
RIP: __read_once_size include/linux/compiler.h:183 [inline] RSP: ffff8881cbbe7330
RIP: compound_head include/linux/page-flags.h:148 [inline] RSP: ffff8881cbbe7330
RIP: get_page include/linux/mm.h:836 [inline] RSP: ffff8881cbbe7330
RIP: submit_page_section fs/direct-io.c:890 [inline] RSP: ffff8881cbbe7330
RIP: do_direct_IO fs/direct-io.c:1097 [inline] RSP: ffff8881cbbe7330
RIP: do_blockdev_direct_IO fs/direct-io.c:1336 [inline] RSP: ffff8881cbbe7330
RIP: __blockdev_direct_IO+0x1dcf/0xe24e fs/direct-io.c:1422 RSP: ffff8881cbbe7330
---[ end trace 57640552f23b3075 ]---