kmalloc-96 1562KB 1668KB kmem_cache_node 215KB 220KB kmem_cache 179KB 218KB Out of memory and no killable processes... Kernel panic - not syncing: System is deadlocked on memory CPU: 3 UID: 0 PID: 5537 Comm: sshd Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 vpanic+0x552/0x970 kernel/panic.c:651 panic+0xd1/0xe0 kernel/panic.c:788 out_of_memory.cold+0xa2/0x170 mm/oom_kill.c:1166 __alloc_pages_may_oom mm/page_alloc.c:4116 [inline] __alloc_pages_slowpath mm/page_alloc.c:4967 [inline] __alloc_frozen_pages_noprof+0x24c2/0x2dc0 mm/page_alloc.c:5317 alloc_pages_mpol+0x1fb/0x540 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x36/0x260 mm/mempolicy.c:2509 __swap_cache_alloc mm/swap_state.c:434 [inline] swap_cache_alloc_folio+0x3d7/0xc50 mm/swap_state.c:524 swap_cache_read_folio+0x47/0x140 mm/swap_state.c:646 swap_cluster_readahead+0x479/0x5f0 mm/swap_state.c:842 swapin_readahead+0x159/0x1200 mm/swap_state.c:984 do_swap_page+0xf98/0x5780 mm/memory.c:4836 handle_pte_fault mm/memory.c:6382 [inline] __handle_mm_fault+0x192f/0x2a00 mm/memory.c:6517 handle_mm_fault+0x37b/0xa30 mm/memory.c:6686 do_user_addr_fault+0x74c/0x12f0 arch/x86/mm/fault.c:1394 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0010:do_sys_poll+0xbd3/0xe90 fs/select.c:1026 Code: 12 e8 61 08 76 ff 48 89 da 48 c1 ea 03 42 0f b6 0c 3a 48 89 da 83 e2 07 83 c2 01 38 ca 7c 08 84 c9 0f 85 51 02 00 00 0f b7 13 <66> 41 89 55 06 41 83 ec 01 49 83 c5 08 48 83 c3 08 e8 27 08 76 ff RSP: 0000:ffffc900038978d0 EFLAGS: 00050246 RAX: 0000000000000000 RBX: ffffc900038979b2 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff829323df RDI: ffff888026010000 RBP: ffffc90003897e18 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000002 R13: 000055694b44b1b0 R14: dffffc0000000000 R15: dffffc0000000000 __do_sys_ppoll fs/select.c:1112 [inline] __se_sys_ppoll fs/select.c:1092 [inline] __x64_sys_ppoll+0x2b5/0x350 fs/select.c:1092 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7f710a7407 Code: Unable to access opcode bytes at 0x7f7f710a73dd. RSP: 002b:00007ffe31885390 EFLAGS: 00000202 ORIG_RAX: 000000000000010f RAX: ffffffffffffffda RBX: 00007f7f71809300 RCX: 00007f7f710a7407 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 000055694b44b1b0 RBP: 0000000000000002 R08: 0000000000000008 R09: 0000000000000000 R10: 00007ffe31885660 R11: 0000000000000202 R12: 0000000000000064 R13: 0000000000000000 R14: 0000556912e21004 R15: 0000000000000002 Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 61 08 76 ff call 0xff760866 5: 48 89 da mov %rbx,%rdx 8: 48 c1 ea 03 shr $0x3,%rdx c: 42 0f b6 0c 3a movzbl (%rdx,%r15,1),%ecx 11: 48 89 da mov %rbx,%rdx 14: 83 e2 07 and $0x7,%edx 17: 83 c2 01 add $0x1,%edx 1a: 38 ca cmp %cl,%dl 1c: 7c 08 jl 0x26 1e: 84 c9 test %cl,%cl 20: 0f 85 51 02 00 00 jne 0x277 26: 0f b7 13 movzwl (%rbx),%edx * 29: 66 41 89 55 06 mov %dx,0x6(%r13) <-- trapping instruction 2e: 41 83 ec 01 sub $0x1,%r12d 32: 49 83 c5 08 add $0x8,%r13 36: 48 83 c3 08 add $0x8,%rbx 3a: e8 27 08 76 ff call 0xff760866