kmalloc-96              1661KB       2360KB
kmem_cache_node          219KB        220KB
kmem_cache               179KB        179KB
Out of memory and no killable processes...
Kernel panic - not syncing: System is deadlocked on memory
CPU: 2 UID: 0 PID: 5348 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x3d/0x1f0 lib/dump_stack.c:120
 vpanic+0x640/0x6f0 kernel/panic.c:489
 panic+0xca/0xd0 kernel/panic.c:626
 out_of_memory+0x16e4/0x1700 mm/oom_kill.c:1181
 __alloc_pages_may_oom mm/page_alloc.c:4060 [inline]
 __alloc_pages_slowpath mm/page_alloc.c:4870 [inline]
 __alloc_frozen_pages_noprof+0x1dfa/0x2470 mm/page_alloc.c:5196
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
 folio_alloc_mpol_noprof+0x36/0x2f0 mm/mempolicy.c:2435
 __read_swap_cache_async+0x20a/0x500 mm/swap_state.c:440
 swap_cluster_readahead+0x528/0x770 mm/swap_state.c:669
 swapin_readahead+0x13a/0xd60 mm/swap_state.c:813
 do_swap_page+0x86c/0x6340 mm/memory.c:4713
 handle_pte_fault mm/memory.c:6180 [inline]
 __handle_mm_fault+0x17d1/0x2aa0 mm/memory.c:6318
 handle_mm_fault+0x589/0xd10 mm/memory.c:6487
 do_user_addr_fault+0x7a6/0x1370 arch/x86/mm/fault.c:1387
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x64/0xc0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0010:__get_user_8+0x14/0x30 arch/x86/lib/getuser.S:103
Code: ca e9 00 35 04 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 ba 00 f0 ff ff ff 7f 00 00 48 39 d0 48 0f 47 c2 0f 01 cb <48> 8b 10 31 c0 0f 01 ca e9 cf 34 04 00 66 66 2e 0f 1f 84 00 00 00
RSP: 0000:ffffc90004167e18 EFLAGS: 00050283
RAX: 00007ff973d996a8 RBX: 00007ff973d996a8 RCX: ffffc90004167dbc
RDX: 00007ffffffff000 RSI: ffffffff81f282d7 RDI: ffffffff8bf075c0
RBP: ffffc90004167f18 R08: d097b7b68f08c411 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804b5b4900
R13: ffffc90004167f48 R14: ffff88804b5b4900 R15: ffffc90004167e80
 rseq_get_rseq_cs_ptr_val kernel/rseq.c:248 [inline]
 rseq_get_rseq_cs kernel/rseq.c:270 [inline]
 rseq_ip_fixup kernel/rseq.c:390 [inline]
 __rseq_handle_notify_resume+0x183/0x10c0 kernel/rseq.c:438
 rseq_handle_notify_resume include/linux/rseq.h:44 [inline]
 resume_user_mode_work include/linux/resume_user_mode.h:62 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:43 [inline]
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 irqentry_exit_to_user_mode+0x1c9/0x310 kernel/entry/common.c:73
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7ff974433460
Code: Unable to access opcode bytes at 0x7ff974433436.
RSP: 002b:00007ffc6600f628 EFLAGS: 00010202
RAX: 00063478c1c69200 RBX: 00005622ef6da428 RCX: 0000000000000000
RDX: 000010c6f7a0b5ed RSI: 00007ffc6600f630 RDI: 00005622ef6c8ed3
RBP: 0000562312a1b148 R08: 00063478c1c69200 R09: 00007ff9745e1000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc6600f630 R14: 0000000000000000 R15: 00063478c1c69200
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..
----------------
Code disassembly (best guess):
   0:	ca e9 00             	lret   $0xe9
   3:	35 04 00 90 90       	xor    $0x90900004,%eax
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	48 ba 00 f0 ff ff ff 	movabs $0x7ffffffff000,%rdx
  1d:	7f 00 00
  20:	48 39 d0             	cmp    %rdx,%rax
  23:	48 0f 47 c2          	cmova  %rdx,%rax
  27:	0f 01 cb             	stac
* 2a:	48 8b 10             	mov    (%rax),%rdx <-- trapping instruction
  2d:	31 c0                	xor    %eax,%eax
  2f:	0f 01 ca             	clac
  32:	e9 cf 34 04 00       	jmp    0x43506
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)