ip (3755) used greatest stack depth: 54672 bytes left
ip (3788) used greatest stack depth: 54408 bytes left
==================================================================
BUG: KMSAN: uninit-value in syslog_print kernel/printk/printk.c:1341 [inline]
BUG: KMSAN: uninit-value in do_syslog+0x3a01/0x3c20 kernel/printk/printk.c:1467
CPU: 1 PID: 3454 Comm: rsyslogd Not tainted 4.16.0+ #82
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676
 syslog_print kernel/printk/printk.c:1341 [inline]
 do_syslog+0x3a01/0x3c20 kernel/printk/printk.c:1467
 kmsg_read+0x142/0x1a0 fs/proc/kmsg.c:40
 proc_reg_read+0x1de/0x2f0 fs/proc/inode.c:218
 __vfs_read+0x19f/0x8e0 fs/read_write.c:411
 vfs_read+0x36c/0x6c0 fs/read_write.c:447
 SYSC_read+0x172/0x360 fs/read_write.c:573
 SyS_read+0x55/0x80 fs/read_write.c:566
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x7fb1841ff1fd
RSP: 002b:00007fb18179ee30 EFLAGS: 00000293 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000000000138dce0 RCX: 00007fb1841ff1fd
RDX: 0000000000000fff RSI: 00007fb182fd35a0 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000001379260 R09: 0000000004000001
R10: 0000000000000001 R11: 0000000000000293 R12: 000000000065e420
R13: 00007fb18179f9c0 R14: 00007fb184844040 R15: 0000000000000003

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:293 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:521
 log_store+0x13e5/0x1490 kernel/printk/printk.c:641
 log_output kernel/printk/printk.c:1832 [inline]
 vprintk_emit+0xc44/0xff0 kernel/printk/printk.c:1897
 vprintk_default+0x90/0xa0 kernel/printk/printk.c:1955
 vprintk_func+0x517/0x700 kernel/printk/printk_safe.c:379
 printk+0x1b6/0x1f0 kernel/printk/printk.c:1991
 check_stack_usage kernel/exit.c:754 [inline]
 do_exit+0x3377/0x38d0 kernel/exit.c:916
 do_group_exit+0x1a0/0x360 kernel/exit.c:970
 SYSC_exit_group+0x21/0x30 kernel/exit.c:981
 SyS_exit_group+0x25/0x30 kernel/exit.c:979
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
Local variable description: ----tlb.i@ldt_arch_exit_mmap
Variable was created at:
 ldt_arch_exit_mmap+0x46/0x160 arch/x86/kernel/ldt.c:298
 arch_exit_mmap arch/x86/include/asm/mmu_context.h:244 [inline]
 exit_mmap+0x30f/0x950 mm/mmap.c:3009
==================================================================