================================================================== BUG: KASAN: stack-out-of-bounds in list_empty include/linux/list.h:373 [inline] BUG: KASAN: stack-out-of-bounds in bpf_net_ctx_get_all_used_flush_lists include/linux/filter.h:855 [inline] BUG: KASAN: stack-out-of-bounds in xdp_do_check_flushed+0x47c/0x4e0 net/core/filter.c:4305 Read of size 8 at addr ffffc9000329fa68 by task syz.3.32/5503 CPU: 2 UID: 0 PID: 5503 Comm: syz.3.32 Not tainted 6.10.0-syzkaller-12562-g1722389b0d86 #0 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:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 list_empty include/linux/list.h:373 [inline] bpf_net_ctx_get_all_used_flush_lists include/linux/filter.h:855 [inline] xdp_do_check_flushed+0x47c/0x4e0 net/core/filter.c:4305 __napi_poll.constprop.0+0xd1/0x550 net/core/dev.c:6774 napi_poll net/core/dev.c:6840 [inline] net_rx_action+0xa92/0x1010 net/core/dev.c:6962 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649 common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:278 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 RIP: 0010:__sanitizer_cov_trace_pc+0x4c/0x60 kernel/kcov.c:213 Code: 35 8b 82 1c 16 00 00 85 c0 74 2b 8b 82 f8 15 00 00 83 f8 02 75 20 48 8b 8a 00 16 00 00 8b 92 fc 15 00 00 48 8b 01 48 83 c0 01 <48> 39 d0 73 07 48 89 01 48 89 34 c1 c3 cc cc cc cc 0f 1f 00 90 90 RSP: 0018:ffffc9000329ed90 EFLAGS: 00000206 RAX: 0000000000001488 RBX: ffffc9000329ee70 RCX: ffffc9000c001000 RDX: 0000000000040000 RSI: ffffffff813c94e6 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000009 R10: 0000000000000004 R11: dffffc0000000000 R12: ffffffff909e8210 R13: 0000000000000004 R14: ffffffff909e8214 R15: ffffc9000329eea5 unwind_next_frame+0x16d6/0x23a0 arch/x86/kernel/unwind_orc.c:521 __unwind_start arch/x86/kernel/unwind_orc.c:760 [inline] __unwind_start+0x57e/0x850 arch/x86/kernel/unwind_orc.c:685 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xb2/0x170 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 save_stack+0x162/0x1f0 mm/page_owner.c:156 __set_page_owner+0x8f/0x790 mm/page_owner.c:320 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3438 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4696 alloc_pages_bulk_noprof+0x742/0x14f0 mm/page_alloc.c:4644 alloc_pages_bulk_array_mempolicy_noprof+0x25b/0x1220 mm/mempolicy.c:2554 vm_area_alloc_pages mm/vmalloc.c:3550 [inline] __vmalloc_area_node mm/vmalloc.c:3660 [inline] __vmalloc_node_range_noprof+0x550/0x1520 mm/vmalloc.c:3841 __vmalloc_node_noprof mm/vmalloc.c:3906 [inline] __vmalloc_noprof+0x6d/0x90 mm/vmalloc.c:3920 bpf_prog_alloc_no_stats+0x54/0x5e0 kernel/bpf/core.c:104 bpf_prog_alloc+0x3b/0x240 kernel/bpf/core.c:145 bpf_prog_load+0x1b4e/0x2670 kernel/bpf/syscall.c:2818 __sys_bpf+0x9e0/0x5600 kernel/bpf/syscall.c:5710 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline] __se_sys_bpf kernel/bpf/syscall.c:5815 [inline] __ia32_sys_bpf+0x76/0xe0 kernel/bpf/syscall.c:5815 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf748e579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f57a657c EFLAGS: 00000292 ORIG_RAX: 0000000000000165 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000200000c0 RDX: 0000000000000090 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to stack of task syz.3.32/5503 and is located at offset 8 in frame: bpf_prog_load+0x0/0x2670 kernel/bpf/syscall.c:2408 This frame has 4 objects: [48, 52) 'err' [64, 72) 'prog' [96, 112) 'uattr' [128, 256) 'license' The buggy address belongs to the virtual mapping at [ffffc90003298000, ffffc900032a1000) created by: kernel_clone+0xfd/0x980 kernel/fork.c:2781 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29fa3 memcg:ffff88802b72e682 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff ffff88802b72e682 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 5449, tgid 5449 (syz.3.15), ts 62728418893, free_ts 62711876382 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3438 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4696 alloc_pages_mpol_noprof+0x275/0x610 mm/mempolicy.c:2263 vm_area_alloc_pages mm/vmalloc.c:3584 [inline] __vmalloc_area_node mm/vmalloc.c:3660 [inline] __vmalloc_node_range_noprof+0xa6a/0x1520 mm/vmalloc.c:3841 alloc_thread_stack_node kernel/fork.c:313 [inline] dup_task_struct kernel/fork.c:1113 [inline] copy_process+0x29f5/0x6f50 kernel/fork.c:2204 kernel_clone+0xfd/0x980 kernel/fork.c:2781 __do_sys_clone3+0x1f5/0x270 kernel/fork.c:3085 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] do_int80_emulation+0x104/0x200 arch/x86/entry/common.c:253 asm_int80_emulation+0x1a/0x20 arch/x86/include/asm/idtentry.h:626 page last free pid 4835 tgid 4835 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2608 __folio_put+0x31c/0x3e0 mm/swap.c:128 folio_put include/linux/mm.h:1486 [inline] free_page_and_swap_cache+0x249/0x2c0 mm/swap_state.c:308 __tlb_remove_table arch/x86/include/asm/tlb.h:34 [inline] __tlb_remove_table_free mm/mmu_gather.c:227 [inline] tlb_remove_table_rcu+0x89/0xe0 mm/mmu_gather.c:282 rcu_do_batch kernel/rcu/tree.c:2569 [inline] rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2843 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Memory state around the buggy address: ffffc9000329f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9000329f980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc9000329fa00: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 ^ ffffc9000329fa80: f1 f1 04 f2 00 f2 f2 f2 00 00 f2 f2 00 00 00 00 ffffc9000329fb00: 00 00 00 00 00 00 00 00 00 00 00 00 f3 f3 f3 f3 ================================================================== ---------------- Code disassembly (best guess): 0: 35 8b 82 1c 16 xor $0x161c828b,%eax 5: 00 00 add %al,(%rax) 7: 85 c0 test %eax,%eax 9: 74 2b je 0x36 b: 8b 82 f8 15 00 00 mov 0x15f8(%rdx),%eax 11: 83 f8 02 cmp $0x2,%eax 14: 75 20 jne 0x36 16: 48 8b 8a 00 16 00 00 mov 0x1600(%rdx),%rcx 1d: 8b 92 fc 15 00 00 mov 0x15fc(%rdx),%edx 23: 48 8b 01 mov (%rcx),%rax 26: 48 83 c0 01 add $0x1,%rax * 2a: 48 39 d0 cmp %rdx,%rax <-- trapping instruction 2d: 73 07 jae 0x36 2f: 48 89 01 mov %rax,(%rcx) 32: 48 89 34 c1 mov %rsi,(%rcx,%rax,8) 36: c3 ret 37: cc int3 38: cc int3 39: cc int3 3a: cc int3 3b: 0f 1f 00 nopl (%rax) 3e: 90 nop 3f: 90 nop