kmalloc-96 1600KB 2052KB kmem_cache_node 224KB 228KB kmem_cache 195KB 195KB Out of memory and no killable processes... Kernel panic - not syncing: System is deadlocked on memory CPU: 3 UID: 0 PID: 5351 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~bpo12+1 04/01/2014 Call Trace: __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+0x16e6/0x1700 mm/oom_kill.c:1182 __alloc_pages_may_oom mm/page_alloc.c:4092 [inline] __alloc_pages_slowpath mm/page_alloc.c:4897 [inline] __alloc_frozen_pages_noprof+0x1dbc/0x2430 mm/page_alloc.c:5223 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486 folio_alloc_mpol_noprof+0x36/0x2f0 mm/mempolicy.c:2505 __read_swap_cache_async+0x20a/0x500 mm/swap_state.c:440 swap_cluster_readahead+0x528/0x770 mm/swap_state.c:665 swapin_readahead+0x160/0x1220 mm/swap_state.c:821 do_swap_page+0x962/0x64a0 mm/memory.c:4753 handle_pte_fault mm/memory.c:6276 [inline] __handle_mm_fault+0x19cb/0x2bb0 mm/memory.c:6411 handle_mm_fault+0x3fe/0xad0 mm/memory.c:6580 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:rseq_set_ids_get_csaddr+0x9e/0x240 include/linux/rseq_entry.h:356 Code: e8 e7 38 c9 ff 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 76 01 00 00 44 8b 7d 00 <44> 89 3b e8 ba 38 c9 ff 44 89 7b 04 e8 b1 38 c9 ff 44 89 73 14 e8 RSP: 0000:ffffc90002befe10 EFLAGS: 00050246 RAX: 0000000000000000 RBX: 00007fc79d5e46a0 RCX: ffffffff81f52064 RDX: 1ffff9200057dfce RSI: ffffffff81f52069 RDI: 0000000000000001 RBP: ffffc90002befe70 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88804b212ff0 R12: ffffc90002befe90 R13: ffff88804b2124c0 R14: 0000000000000000 R15: 0000000000000003 rseq_update_usr include/linux/rseq_entry.h:382 [inline] rseq_slowpath_update_usr kernel/rseq.c:286 [inline] __rseq_handle_slowpath+0x250/0x3c0 kernel/rseq.c:312 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:44 [inline] exit_to_user_mode_loop kernel/entry/common.c:75 [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+0x3de/0x8c0 kernel/entry/common.c:196 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fc79ce482b0 Code: Unable to access opcode bytes at 0x7fc79ce48286. RSP: 002b:00007ffe73c01968 EFLAGS: 00010202 RAX: 000055e1e8bbded0 RBX: 000055e1e8bd2e80 RCX: 0000000000000004 RDX: 0000000000000006 RSI: 00007ffe73c019cc RDI: 000055e1e8bbded0 RBP: fffffffffffffffd R08: 000055e1e8bd2e80 R09: 00007fc79cff1ac0 R10: 000055e1e8ba84d0 R11: 0000000000000010 R12: 00007ffe73c019cc R13: 000055e1e8ba84d0 R14: 0000000000000001 R15: 000055e1e8bcb660 Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess): 0: e8 e7 38 c9 ff call 0xffc938ec 5: 48 89 ea mov %rbp,%rdx 8: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax f: fc ff df 12: 48 c1 ea 03 shr $0x3,%rdx 16: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 1a: 84 c0 test %al,%al 1c: 74 08 je 0x26 1e: 3c 03 cmp $0x3,%al 20: 0f 8e 76 01 00 00 jle 0x19c 26: 44 8b 7d 00 mov 0x0(%rbp),%r15d * 2a: 44 89 3b mov %r15d,(%rbx) <-- trapping instruction 2d: e8 ba 38 c9 ff call 0xffc938ec 32: 44 89 7b 04 mov %r15d,0x4(%rbx) 36: e8 b1 38 c9 ff call 0xffc938ec 3b: 44 89 73 14 mov %r14d,0x14(%rbx) 3f: e8 .byte 0xe8