random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
==================================================================
BUG: KMSAN: kernel-infoleak in copyout lib/iov_iter.c:140 [inline]
BUG: KMSAN: kernel-infoleak in copy_page_to_iter_iovec lib/iov_iter.c:212 [inline]
BUG: KMSAN: kernel-infoleak in copy_page_to_iter+0x755/0x1af0 lib/iov_iter.c:846
CPU: 0 PID: 4575 Comm: blkid Not tainted 4.18.0-rc8+ #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x17c/0x1c0 lib/dump_stack.c:113
 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:982
 kmsan_internal_check_memory+0x17e/0x1f0 mm/kmsan/kmsan.c:1046
 kmsan_copy_to_user+0x73/0xb0 mm/kmsan/kmsan_hooks.c:479
 copyout lib/iov_iter.c:140 [inline]
 copy_page_to_iter_iovec lib/iov_iter.c:212 [inline]
 copy_page_to_iter+0x755/0x1af0 lib/iov_iter.c:846
 generic_file_buffered_read mm/filemap.c:2185 [inline]
 generic_file_read_iter+0x3469/0x4430 mm/filemap.c:2362
 blkdev_read_iter+0x20d/0x270 fs/block_dev.c:1934
 call_read_iter include/linux/fs.h:1787 [inline]
 new_sync_read fs/read_write.c:406 [inline]
 __vfs_read+0x7b9/0x9f0 fs/read_write.c:418
 vfs_read+0x36c/0x6b0 fs/read_write.c:452
 ksys_read fs/read_write.c:578 [inline]
 __do_sys_read fs/read_write.c:588 [inline]
 __se_sys_read fs/read_write.c:586 [inline]
 __x64_sys_read+0x1b7/0x3c0 fs/read_write.c:586
 do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x7f1c09eca310
Code: 73 01 c3 48 8b 0d 28 4b 2b 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 83 3d e5 a2 2b 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 6e 8a 01 00 48 89 04 24 
RSP: 002b:00007fffc69e5088 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000000000000fc00 RCX: 00007f1c09eca310
RDX: 0000000000000400 RSI: 0000000000f09868 RDI: 0000000000000003
RBP: 0000000000f09840 R08: 0000000000000028 R09: 0000000001680000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000f05030
R13: 0000000000000400 R14: 0000000000f05080 R15: 0000000000f09858

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:256 [inline]
 kmsan_internal_alloc_meta_for_pages+0x146/0x700 mm/kmsan/kmsan.c:694
 kmsan_alloc_page+0x75/0xd0 mm/kmsan/kmsan_hooks.c:250
 __alloc_pages_nodemask+0xf6b/0x5c80 mm/page_alloc.c:4409
 alloc_pages_current+0x6b1/0x970 mm/mempolicy.c:2093
 alloc_pages include/linux/gfp.h:494 [inline]
 __page_cache_alloc+0x95/0x320 mm/filemap.c:946
 pagecache_get_page+0xd21/0x13b0 mm/filemap.c:1577
 grab_cache_page_write_begin+0x10d/0x190 mm/filemap.c:3089
 block_write_begin+0xf2/0x380 fs/buffer.c:2068
 blkdev_write_begin+0xf5/0x110 fs/block_dev.c:585
 generic_perform_write+0x439/0xa20 mm/filemap.c:3139
 __generic_file_write_iter+0x42a/0x9d0 mm/filemap.c:3264
 blkdev_write_iter+0x3a3/0x5d0 fs/block_dev.c:1914
 call_write_iter include/linux/fs.h:1793 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x7ac/0xa50 fs/read_write.c:487
 vfs_write+0x467/0x8c0 fs/read_write.c:549
 ksys_write fs/read_write.c:598 [inline]
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x1b7/0x3c0 fs/read_write.c:607
 do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7

Bytes 736-1023 of 1024 are uninitialized
Memory access starts at ffff8801c1f38c00
==================================================================