RDX: 0000000020000040 RSI: ffffffffffffffb2 RDI: 0000000000000004
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8dd312e6d4
R13: 00000000004be737 R14: 00000000004ce6f8 R15: 0000000000000005
==================================================================
BUG: KMSAN: uninit-value in load_elf_binary+0x1fbb/0x9480 fs/binfmt_elf.c:902
CPU: 1 PID: 16909 Comm: blkid Not tainted 4.20.0-rc2+ #88
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+0x32d/0x480 lib/dump_stack.c:113
 kmsan_report+0x19f/0x300 mm/kmsan/kmsan.c:911
 __msan_warning+0x76/0xc0 mm/kmsan/kmsan_instr.c:415
 load_elf_binary+0x1fbb/0x9480 fs/binfmt_elf.c:902
 search_binary_handler+0x4a7/0x1050 fs/exec.c:1653
 exec_binprm fs/exec.c:1695 [inline]
 __do_execve_file+0x2212/0x33d0 fs/exec.c:1819
 do_execveat_common fs/exec.c:1866 [inline]
 do_execve fs/exec.c:1883 [inline]
 __do_sys_execve fs/exec.c:1964 [inline]
 __se_sys_execve+0xec/0x110 fs/exec.c:1959
 __x64_sys_execve+0x4a/0x70 fs/exec.c:1959
 do_syscall_64+0xcf/0x110 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x7f5f6cfc6207
Code: Bad RIP value.
RSP: 002b:00007ffd83299708 EFLAGS: 00000202 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f5f6cfc6207
RDX: 000000000243ffe0 RSI: 00007ffd83299800 RDI: 00007ffd8329a810
RBP: 0000000000625500 R08: 000000000000352e R09: 000000000000352e
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000243ffe0
R13: 0000000000000007 R14: 000000000242f250 R15: 0000000000000005

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:252 [inline]
 kmsan_internal_poison_shadow+0xc8/0x1c0 mm/kmsan/kmsan.c:177
 kmsan_kmalloc+0x98/0xf0 mm/kmsan/kmsan_hooks.c:104
 kmsan_slab_alloc+0xe/0x10 mm/kmsan/kmsan_hooks.c:113
 slab_post_alloc_hook mm/slab.h:446 [inline]
 slab_alloc_node mm/slub.c:2765 [inline]
 slab_alloc mm/slub.c:2773 [inline]
 __kmalloc+0x379/0x4d0 mm/slub.c:3819
 kmalloc include/linux/slab.h:551 [inline]
 load_elf_phdrs fs/binfmt_elf.c:441 [inline]
 load_elf_binary+0x4f92/0x9480 fs/binfmt_elf.c:838
 search_binary_handler+0x4a7/0x1050 fs/exec.c:1653
 exec_binprm fs/exec.c:1695 [inline]
 __do_execve_file+0x2212/0x33d0 fs/exec.c:1819
 do_execveat_common fs/exec.c:1866 [inline]
 do_execve fs/exec.c:1883 [inline]
 __do_sys_execve fs/exec.c:1964 [inline]
 __se_sys_execve+0xec/0x110 fs/exec.c:1959
 __x64_sys_execve+0x4a/0x70 fs/exec.c:1959
 do_syscall_64+0xcf/0x110 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
==================================================================