Comment # 3 on bug 1027456 from Fabian Baumanis

Reproduced the problem with version 4.9 of the kernel this morning.

rapido1:/# [  392.449736] random: crng init done
[  677.070197] kmemleak: 2 new suspected memory leaks (see
/sys/kernel/debug/kmemleak)
cat /sys/kernel/debug/kmemleak 
unreferenced object 0xffffc900002f4000 (size 16384):
  comm "sh", pid 240, jiffies 4294893177 (age 853.892s)
  hex dump (first 32 bytes):
    9d 6e ac 57 00 00 00 00 00 00 00 00 00 00 00 00  .n.W............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff815385e9>] kmemleak_alloc+0x49/0xa0
    [<ffffffff810e7af6>] __vmalloc_node_range+0x176/0x250
    [<ffffffff81040cbd>] copy_process.part.63+0x4cd/0x1790
    [<ffffffff8104214b>] _do_fork+0xdb/0x2c0
    [<ffffffff810423b4>] SyS_clone+0x14/0x20
    [<ffffffff81001198>] do_syscall_64+0x48/0xb0
    [<ffffffff8153c786>] return_from_SYSCALL_64+0x0/0x6a
    [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffffc90000548000 (size 16384):
  comm "sh", pid 204, jiffies 4294893187 (age 853.852s)
  hex dump (first 32 bytes):
    9d 6e ac 57 00 00 00 00 00 00 00 00 fe 01 00 00  .n.W............
    c0 77 6f 00 00 ea ff ff 00 78 6f 00 00 ea ff ff  .wo......xo.....
  backtrace:
    [<ffffffff815385e9>] kmemleak_alloc+0x49/0xa0
    [<ffffffff810e7af6>] __vmalloc_node_range+0x176/0x250
    [<ffffffff81040cbd>] copy_process.part.63+0x4cd/0x1790
    [<ffffffff8104214b>] _do_fork+0xdb/0x2c0
    [<ffffffff810423b4>] SyS_clone+0x14/0x20
    [<ffffffff81001198>] do_syscall_64+0x48/0xb0
    [<ffffffff8153c786>] return_from_SYSCALL_64+0x0/0x6a
    [<ffffffffffffffff>] 0xffffffffffffffff

Then I went ahead with addr2line again.
fbaumanis@linux:~/kernel_storage_team/linux> addr2line -e vmlinux -i
ffffffff8104214b
/home/fbaumanis/kernel_storage_team/linux/kernel/fork.c:1940

fbaumanis@linux:~/kernel_storage_team/linux> addr2line -e vmlinux -i
ffffffff810423b4
/home/fbaumanis/kernel_storage_team/linux/kernel/fork.c:2037

fbaumanis@linux:~/kernel_storage_team/linux> addr2line -e vmlinux -i
ffffffff81040cbd
/home/fbaumanis/kernel_storage_team/linux/kernel/fork.c:203
/home/fbaumanis/kernel_storage_team/linux/kernel/fork.c:484
/home/fbaumanis/kernel_storage_team/linux/kernel/fork.c:1508