kmalloc-96 2173KB 2736KB kmem_cache_node 217KB 220KB kmem_cache 180KB 218KB Out of memory and no killable processes... Kernel panic - not syncing: System is deadlocked on memory CPU: 0 UID: 0 PID: 5144 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 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 vpanic+0x553/0x970 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:4113 [inline] __alloc_pages_slowpath mm/page_alloc.c:5030 [inline] __alloc_frozen_pages_noprof+0x282b/0x32e0 mm/page_alloc.c:5449 alloc_pages_mpol+0x201/0x550 mm/mempolicy.c:2486 folio_alloc_mpol_noprof+0x36/0x260 mm/mempolicy.c:2505 __swap_cache_alloc mm/swap_state.c:440 [inline] swap_cache_alloc_folio+0x3d7/0xc50 mm/swap_state.c:530 swap_cache_read_folio+0x47/0x140 mm/swap_state.c:652 swap_cache_read_folio_sync mm/swap_state.c:736 [inline] swap_cluster_readahead+0x477/0x5d0 mm/swap_state.c:858 swapin_readahead+0xf0/0x260 mm/swap_state.c:997 do_swap_page+0xf6d/0x5570 mm/memory.c:4971 handle_pte_fault mm/memory.c:6561 [inline] __handle_mm_fault+0x15bd/0x2f60 mm/memory.c:6707 handle_mm_fault+0x363/0xa20 mm/memory.c:6876 do_user_addr_fault+0x745/0x12f0 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:epoll_put_uevent include/linux/eventpoll.h:98 [inline] RIP: 0010:ep_deliver_event fs/eventpoll.c:2099 [inline] RIP: 0010:ep_send_events+0x3ba/0xc10 fs/eventpoll.c:2159 Code: 84 c1 0f 85 7b 07 00 00 48 8b 53 6c 48 8b 44 24 30 48 8b 4c 24 38 48 89 54 24 28 48 39 c8 48 0f 47 c1 0f 01 cb 48 89 44 24 18 <44> 89 30 e8 ce da 5c ff 48 8b 44 24 18 48 8b 54 24 28 48 89 50 04 RSP: 0018:ffffc90028b77b98 EFLAGS: 00050283 RAX: 00007ffe876b4ab0 RBX: ffff88804fa9aa80 RCX: 00007ffffffff000 RDX: 0000000000000004 RSI: 0000000000000001 RDI: ffff88804fa9aaec RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88804fa9aa98 R13: ffff88804fa9aa98 R14: 0000000000000001 R15: ffffc90028b77c00 ep_try_send_events fs/eventpoll.c:2224 [inline] ep_poll fs/eventpoll.c:2289 [inline] do_epoll_wait+0x6d3/0x1790 fs/eventpoll.c:2829 __do_sys_epoll_wait fs/eventpoll.c:2837 [inline] __se_sys_epoll_wait fs/eventpoll.c:2832 [inline] __x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2832 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x121/0x770 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f828addb407 Code: Unable to access opcode bytes at 0x7f828addb3dd. RSP: 002b:00007ffe876b4950 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 00007f828ad4f880 RCX: 00007f828addb407 RDX: 0000000000000008 RSI: 00007ffe876b4ab0 RDI: 000000000000000b RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000bb8 R11: 0000000000000202 R12: 0000000000000000 R13: 000055ff00720100 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess): 0: 84 c1 test %al,%cl 2: 0f 85 7b 07 00 00 jne 0x783 8: 48 8b 53 6c mov 0x6c(%rbx),%rdx c: 48 8b 44 24 30 mov 0x30(%rsp),%rax 11: 48 8b 4c 24 38 mov 0x38(%rsp),%rcx 16: 48 89 54 24 28 mov %rdx,0x28(%rsp) 1b: 48 39 c8 cmp %rcx,%rax 1e: 48 0f 47 c1 cmova %rcx,%rax 22: 0f 01 cb stac 25: 48 89 44 24 18 mov %rax,0x18(%rsp) * 2a: 44 89 30 mov %r14d,(%rax) <-- trapping instruction 2d: e8 ce da 5c ff call 0xff5cdb00 32: 48 8b 44 24 18 mov 0x18(%rsp),%rax 37: 48 8b 54 24 28 mov 0x28(%rsp),%rdx 3c: 48 89 50 04 mov %rdx,0x4(%rax)