kmalloc-96 1417KB 1780KB kmem_cache_node 223KB 224KB kmem_cache 187KB 187KB Out of memory and no killable processes... Kernel panic - not syncing: System is deadlocked on memory CPU: 3 UID: 0 PID: 1 Comm: init 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: __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:4055 [inline] __alloc_pages_slowpath mm/page_alloc.c:4865 [inline] __alloc_frozen_pages_noprof+0x1dfa/0x2470 mm/page_alloc.c:5191 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+0x160/0x1180 mm/swap_state.c:826 do_swap_page+0x86c/0x6340 mm/memory.c:4714 handle_pte_fault mm/memory.c:6198 [inline] __handle_mm_fault+0x17d1/0x2aa0 mm/memory.c:6336 handle_mm_fault+0x589/0xd10 mm/memory.c:6505 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 40 34 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 0f 34 04 00 66 66 2e 0f 1f 84 00 00 00 RSP: 0000:ffffc90000137e18 EFLAGS: 00050287 RAX: 00007f2c0bbfbae8 RBX: 00007f2c0bbfbae8 RCX: ffffc90000137dbc RDX: 00007ffffffff000 RSI: ffffffff81f33547 RDI: ffffffff8bf08840 RBP: ffffc90000137f18 R08: 255fd69911439148 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801d6b8000 R13: ffffc90000137f48 R14: ffff88801d6b8000 R15: ffffc90000137e80 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: 0033:0x7f2c0be0c18b Code: Unable to access opcode bytes at 0x7f2c0be0c161. RSP: 002b:00007fffac2c49b0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000008 RCX: 00007f2c0bdb52c7 RDX: 0000000000000001 RSI: 0000000000000006 RDI: 00007f2c0bf4b7a9 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000002be2 R15: 000055d41bf1fd98 Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess): 0: ca e9 40 lret $0x40e9 3: 34 04 xor $0x4,%al 5: 00 90 90 90 90 90 add %dl,-0x6f6f6f70(%rax) 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 0f 34 04 00 jmp 0x43446 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax)