======================================
| xx__-> echo scan > /sys/kernel/debug/kmemleak && cat /sys/kernel/debug/kmemleak
| xx__-> echo scan > /sys/kernel/debug/kmemleak && cat /sys/kernel/debug/kmemleak
| xx__-> [  203.311566][ T1801] modprobe (1801) used greatest stack depth: 21904 bytes left
| [  205.856323][ T1328] iperf3 invoked oom-killer: gfp_mask=0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), order=0, oom_score_adj=0
[  205.857145][ T1328] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  205.857148][ T1328] Call Trace:
[  205.857151][ T1328]  <TASK>
[ 205.857154][ T1328] dump_stack_lvl (lib/dump_stack.c:123) 
[ 205.857167][ T1328] dump_header (mm/oom_kill.c:74 mm/oom_kill.c:468) 
[ 205.857181][ T1328] oom_kill_process (mm/oom_kill.c:1041) 
[ 205.857190][ T1328] out_of_memory (mm/oom_kill.c:1180 (discriminator 4)) 
[ 205.857199][ T1328] ? __pfx_out_of_memory (mm/oom_kill.c:1113) 
[ 205.857219][ T1328] __alloc_pages_may_oom (mm/page_alloc.c:3645) 
[ 205.857227][ T1328] ? __pfx___alloc_pages_may_oom (mm/page_alloc.c:3577) 
[ 205.857247][ T1328] __alloc_pages_slowpath.constprop.0 (mm/page_alloc.c:4432) 
[ 205.857259][ T1328] ? get_page_from_freelist (mm/page_alloc.c:3235 mm/page_alloc.c:3430) 
[ 205.857266][ T1328] ? __pfx___alloc_pages_slowpath.constprop.0 (mm/page_alloc.c:4206) 
[ 205.857291][ T1328] __alloc_frozen_pages_noprof (mm/page_alloc.c:4752) 
[ 205.857296][ T1328] ? __pfx___alloc_frozen_pages_noprof (mm/page_alloc.c:4705) 
[ 205.857299][ T1328] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 205.857315][ T1328] ? filemap_get_entry (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 mm/filemap.c:1878) 
[ 205.857327][ T1328] alloc_pages_mpol (mm/mempolicy.c:2272) 
[ 205.857334][ T1328] ? __pfx_alloc_pages_mpol (mm/mempolicy.c:2227) 
[ 205.857342][ T1328] ? down_read (kernel/locking/rwsem.c:1247 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) 
[ 205.857351][ T1328] folio_alloc_noprof (mm/mempolicy.c:2361 mm/mempolicy.c:2371) 
[ 205.857356][ T1328] __filemap_get_folio (mm/filemap.c:1970) 
[ 205.857365][ T1328] filemap_fault (mm/filemap.c:3457) 
[ 205.857372][ T1328] ? do_fault_around (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 mm/memory.c:5364) 
[ 205.857378][ T1328] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 205.857383][ T1328] ? __pfx_filemap_fault (mm/filemap.c:3406) 
[ 205.857394][ T1328] ? do_fault_around (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 mm/memory.c:5364) 
[ 205.857398][ T1328] ? __pfx_filemap_map_pages (mm/filemap.c:3767) 
[ 205.857407][ T1328] __do_fault (mm/memory.c:4988) 
[ 205.857413][ T1328] do_pte_missing (mm/memory.c:5403 mm/memory.c:5537 mm/memory.c:4058) 
[ 205.857416][ T1328] ? handle_pte_fault (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/linux/pgtable.h:136 mm/memory.c:5894) 
[ 205.857429][ T1328] handle_pte_fault (mm/memory.c:5900) 
[ 205.857442][ T1328] ? __pfx_handle_pte_fault (mm/memory.c:5857) 
[ 205.857457][ T1328] __handle_mm_fault (mm/memory.c:6043) 
[ 205.857463][ T1328] ? __pfx___handle_mm_fault (mm/memory.c:5952) 
[ 205.857493][ T1328] ? __pfx_lock_vma_under_rcu (mm/memory.c:6368) 
[ 205.857502][ T1328] handle_mm_fault (mm/memory.c:6224) 
[ 205.857507][ T1328] ? __pfx_handle_mm_fault (mm/memory.c:6179) 
[ 205.857512][ T1328] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 205.857526][ T1328] do_user_addr_fault (arch/x86/mm/fault.c:1337) 
[ 205.857544][ T1328] exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:87 ./arch/x86/include/asm/irqflags.h:147 arch/x86/mm/fault.c:1488 arch/x86/mm/fault.c:1538) 
[ 205.857554][ T1328] asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623) 
[  205.857559][ T1328] RIP: 0033:0x7fce2f8cbb0c
[ 205.857571][ T1328] Code: Unable to access opcode bytes at 0x7fce2f8cbae2.

Code starting with the faulting instruction
===========================================
[  205.857573][ T1328] RSP: 002b:00007fce29fa3d20 EFLAGS: 00010246
[  205.857579][ T1328] RAX: 0000000000005d60 RBX: 0000000000005d60 RCX: 00007fce2f8cbb0c
[  205.857582][ T1328] RDX: 0000000000005d60 RSI: 00007fce2f0692a0 RDI: 000000000000001a
[  205.857585][ T1328] RBP: 00007fce2f0692a0 R08: 0000000000000002 R09: 00007fffaef9283f
[  205.857588][ T1328] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000020000


Finger prints:
dump_header:oom_kill_process:out_of_memory:__alloc_pages_may_oom:__alloc_frozen_pages_noprof