kmalloc-96 1699KB 1964KB kmem_cache_node 213KB 220KB kmem_cache 177KB 218KB Out of memory and no killable processes... Kernel panic - not syncing: System is deadlocked on memory CPU: 2 UID: 0 PID: 5348 Comm: udevd Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP 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:650 panic+0xd1/0xe0 kernel/panic.c:787 out_of_memory.cold+0xa2/0x170 mm/oom_kill.c:1182 __alloc_pages_may_oom mm/page_alloc.c:4139 [inline] __alloc_pages_slowpath mm/page_alloc.c:4937 [inline] __alloc_frozen_pages_noprof+0x233d/0x2ba0 mm/page_alloc.c:5263 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2484 folio_alloc_mpol_noprof+0x36/0x340 mm/mempolicy.c:2503 swap_cache_alloc_folio+0x1a8/0x300 mm/swap_state.c:571 swap_cluster_readahead+0x53b/0x770 mm/swap_state.c:768 swapin_readahead+0x160/0x12c0 mm/swap_state.c:924 do_swap_page+0xb2e/0x6900 mm/memory.c:4802 handle_pte_fault mm/memory.c:6320 [inline] __handle_mm_fault+0x18c1/0x2b60 mm/memory.c:6455 handle_mm_fault+0x36d/0xa20 mm/memory.c:6624 do_user_addr_fault+0x74c/0x12f0 arch/x86/mm/fault.c:1385 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0010:rseq_set_ids_get_csaddr+0x88/0x210 include/linux/rseq_entry.h:503 Code: 0f 47 e8 0f 01 cb 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 42 01 00 00 44 8b 3b <44> 89 7d 00 e8 ef fd c7 ff 44 89 7d 04 e8 e6 fd c7 ff 44 89 75 14 RSP: 0000:ffffc9000398fe28 EFLAGS: 00050246 RAX: 0000000000000000 RBX: ffffc9000398fe80 RCX: ffffc9000398fea0 RDX: 1ffff92000731fd0 RSI: ffffffff82401750 RDI: ffff888024ee95d8 RBP: 00007f1196483680 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888024ee8000 R13: ffffc9000398fea0 R14: 0000000000000000 R15: 0000000000000003 rseq_update_usr include/linux/rseq_entry.h:536 [inline] rseq_slowpath_update_usr kernel/rseq.c:306 [inline] __rseq_handle_slowpath+0x251/0x3c0 kernel/rseq.c:332 rseq_handle_slowpath include/linux/rseq.h:17 [inline] resume_user_mode_work include/linux/resume_user_mode.h:62 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop kernel/entry/common.c:98 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline] irqentry_exit+0x24c/0x670 kernel/entry/common.c:219 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x55a665038f11 Code: Unable to access opcode bytes at 0x55a665038ee7. RSP: 002b:00007ffe1f4f26d0 EFLAGS: 00010212 RAX: 000055a69f35aba0 RBX: 000000000000008b RCX: 000055a69f35ace8 RDX: 00000000000001c8 RSI: 0000000000000000 RDI: 000055a69f35ad20 RBP: 000055a69f346910 R08: 0000000000000040 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe1f4f2848 R13: 0000000000000063 R14: 00007ffe1f4f276c R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess): 0: 0f 47 e8 cmova %eax,%ebp 3: 0f 01 cb stac 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 89 da mov %rbx,%rdx 13: 48 c1 ea 03 shr $0x3,%rdx 17: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 1b: 84 c0 test %al,%al 1d: 74 08 je 0x27 1f: 3c 03 cmp $0x3,%al 21: 0f 8e 42 01 00 00 jle 0x169 27: 44 8b 3b mov (%rbx),%r15d * 2a: 44 89 7d 00 mov %r15d,0x0(%rbp) <-- trapping instruction 2e: e8 ef fd c7 ff call 0xffc7fe22 33: 44 89 7d 04 mov %r15d,0x4(%rbp) 37: e8 e6 fd c7 ff call 0xffc7fe22 3c: 44 89 75 14 mov %r14d,0x14(%rbp)