================================================================== BUG: KASAN: stack-out-of-bounds in bpf_net_ctx_get_all_used_flush_lists include/linux/filter.h:837 [inline] BUG: KASAN: stack-out-of-bounds in xdp_do_check_flushed+0x41c/0x4e0 net/core/filter.c:4298 Read of size 4 at addr ffffc900032bfa50 by task syz.0.42/5811 CPU: 0 UID: 0 PID: 5811 Comm: syz.0.42 Not tainted 6.10.0-syzkaller-12246-g786c8248dbd3-dirty #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 bpf_net_ctx_get_all_used_flush_lists include/linux/filter.h:837 [inline] xdp_do_check_flushed+0x41c/0x4e0 net/core/filter.c:4298 __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 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 RIP: 0010:const_folio_flags.constprop.0+0x56/0x150 include/linux/page-flags.h:310 Code: 8b 6b 08 31 ff 83 e5 01 48 89 ee e8 84 cc ab ff 48 85 ed 0f 85 d4 00 00 00 e8 46 d1 ab ff 66 90 e8 3f d1 ab ff e8 3a d1 ab ff <48> 89 d8 5b 5d 41 5c c3 cc cc cc cc e8 29 d1 ab ff 48 89 dd 31 ff RSP: 0018:ffffc900032bf6d0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffffea00010118c0 RCX: ffffffff81deb54c RDX: ffff8880274e8000 RSI: ffffffff81deb566 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000127 R13: ffff88802305c948 R14: ffffea00010118c0 R15: 0000000000000000 folio_test_swapbacked include/linux/page-flags.h:534 [inline] folio_test_swapcache include/linux/page-flags.h:576 [inline] free_swap_cache mm/swap_state.c:291 [inline] free_pages_and_swap_cache+0x24e/0x510 mm/swap_state.c:325 __tlb_batch_free_encoded_pages+0xf9/0x290 mm/mmu_gather.c:136 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu mm/mmu_gather.c:373 [inline] tlb_finish_mmu+0x168/0x7b0 mm/mmu_gather.c:465 exit_mmap+0x3d1/0xb20 mm/mmap.c:3395 __mmput+0x12a/0x480 kernel/fork.c:1345 mmput+0x62/0x70 kernel/fork.c:1367 exit_mm kernel/exit.c:571 [inline] do_exit+0x9bf/0x2bb0 kernel/exit.c:869 do_group_exit+0xd3/0x2a0 kernel/exit.c:1031 get_signal+0x25fd/0x2770 kernel/signal.c:2917 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6f7c575b59 Code: Unable to access opcode bytes at 0x7f6f7c575b2f. RSP: 002b:00007f6f7d27b0f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f6f7c705f68 RCX: 00007f6f7c575b59 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6f7c705f68 RBP: 00007f6f7c705f60 R08: 00007f6f7d27b6c0 R09: 00007f6f7d27b6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6f7c705f6c R13: 000000000000000b R14: 00007ffd97f8d280 R15: 00007ffd97f8d368 The buggy address belongs to stack of task syz.0.42/5811 and is located at offset 24 in frame: exit_mmap+0x0/0xb20 mm/mmap.c:3202 This frame has 2 objects: [32, 96) 'vmi' [128, 256) 'tlb' The buggy address belongs to the virtual mapping at [ffffc900032b8000, ffffc900032c1000) 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:0xffff88802b3e0000 pfn:0x2b3e0 memcg:ffff8880206d0182 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: ffff88802b3e0000 0000000000000000 00000001ffffffff ffff8880206d0182 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 5653, tgid 5653 (syz-executor), ts 116595661744, free_ts 116458660012 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+0x2f3b/0x8de0 kernel/fork.c:2204 kernel_clone+0xfd/0x980 kernel/fork.c:2781 __do_sys_clone+0xba/0x100 kernel/fork.c:2924 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 5653 tgid 5653 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 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] __kmalloc_cache_node_noprof+0x173/0x350 mm/slub.c:4197 kmalloc_node_noprof include/linux/slab.h:704 [inline] __get_vm_area_node+0xe1/0x2d0 mm/vmalloc.c:3109 __vmalloc_node_range_noprof+0x276/0x1520 mm/vmalloc.c:3801 __vmalloc_node_noprof mm/vmalloc.c:3906 [inline] vzalloc_noprof+0x6b/0x90 mm/vmalloc.c:3979 alloc_counters net/ipv4/netfilter/ip_tables.c:799 [inline] copy_entries_to_user net/ipv4/netfilter/ip_tables.c:821 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1022 [inline] do_ipt_get_ctl+0x6b8/0xaa0 net/ipv4/netfilter/ip_tables.c:1668 nf_getsockopt+0x79/0xe0 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x18e/0x1e0 net/ipv4/ip_sockglue.c:1777 tcp_getsockopt+0x9e/0x100 net/ipv4/tcp.c:4409 do_sock_getsockopt+0x2e5/0x760 net/socket.c:2386 __sys_getsockopt+0x1a1/0x270 net/socket.c:2415 __do_sys_getsockopt net/socket.c:2425 [inline] __se_sys_getsockopt net/socket.c:2422 [inline] __x64_sys_getsockopt+0xbd/0x160 net/socket.c:2422 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 Memory state around the buggy address: ffffc900032bf900: f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc900032bf980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc900032bfa00: 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 ^ ffffc900032bfa80: 00 00 00 f2 f2 f2 f2 00 00 00 00 00 00 00 00 00 ffffc900032bfb00: 00 00 00 00 00 00 00 f3 f3 f3 f3 00 00 00 00 00 ================================================================== ---------------- Code disassembly (best guess): 0: 8b 6b 08 mov 0x8(%rbx),%ebp 3: 31 ff xor %edi,%edi 5: 83 e5 01 and $0x1,%ebp 8: 48 89 ee mov %rbp,%rsi b: e8 84 cc ab ff call 0xffabcc94 10: 48 85 ed test %rbp,%rbp 13: 0f 85 d4 00 00 00 jne 0xed 19: e8 46 d1 ab ff call 0xffabd164 1e: 66 90 xchg %ax,%ax 20: e8 3f d1 ab ff call 0xffabd164 25: e8 3a d1 ab ff call 0xffabd164 * 2a: 48 89 d8 mov %rbx,%rax <-- trapping instruction 2d: 5b pop %rbx 2e: 5d pop %rbp 2f: 41 5c pop %r12 31: c3 ret 32: cc int3 33: cc int3 34: cc int3 35: cc int3 36: e8 29 d1 ab ff call 0xffabd164 3b: 48 89 dd mov %rbx,%rbp 3e: 31 ff xor %edi,%edi