hrtimer: interrupt took 65239 ns ================================================================== BUG: KASAN: slab-out-of-bounds in __bpf_get_stackid+0x6bf/0x900 kernel/bpf/stackmap.c:271 Write of size 32 at addr ffff88802ece9c60 by task syz.0.144/6191 CPU: 1 PID: 6191 Comm: syz.0.144 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xa8/0x210 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x241/0x290 mm/kasan/generic.c:187 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 __bpf_get_stackid+0x6bf/0x900 kernel/bpf/stackmap.c:271 ____bpf_get_stackid_pe kernel/bpf/stackmap.c:374 [inline] bpf_get_stackid_pe+0x2f0/0x410 kernel/bpf/stackmap.c:331 bpf_prog_644fb7c94e15512a+0x33/0x48 bpf_dispatcher_nop_func include/linux/bpf.h:1224 [inline] __bpf_prog_run include/linux/filter.h:616 [inline] bpf_prog_run include/linux/filter.h:623 [inline] bpf_overflow_handler+0x1fc/0x510 kernel/events/core.c:10584 __perf_event_overflow+0x447/0x630 kernel/events/core.c:9720 perf_event_overflow kernel/events/core.c:9741 [inline] perf_swevent_hrtimer+0x439/0x610 kernel/events/core.c:11230 __run_hrtimer kernel/time/hrtimer.c:1754 [inline] __hrtimer_run_queues+0x4e1/0xc40 kernel/time/hrtimer.c:1818 hrtimer_interrupt+0x3c9/0x9c0 kernel/time/hrtimer.c:1880 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline] __sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0x51/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0033:0x7ffe00acc980 Code: ff 0f 0f 87 64 01 00 00 b8 01 00 00 00 89 f9 d3 e0 a9 83 08 00 00 0f 84 f5 00 00 00 4c 8d 35 07 b7 ff ff 41 89 fc 49 c1 e4 04 <4b> 8d 5c 26 20 45 8b 3e 41 f6 c7 01 75 32 41 8b 46 04 83 f8 01 75 RSP: 002b:00007f404e827ff0 EFLAGS: 00000202 RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 00007f404dab9b40 RSI: 00007f404e8280b0 RDI: 0000000000000001 RBP: 00007f404e828030 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000010 R13: 00007f404dc16038 R14: 00007ffe00ac8080 R15: 00007ffe00a24e58 Allocated by task 6191: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:53 ____kasan_kmalloc mm/kasan/common.c:375 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1007 [inline] __kmalloc_node+0xb4/0x230 mm/slab_common.c:1014 kmalloc_node include/linux/slab.h:620 [inline] __bpf_map_area_alloc kernel/bpf/syscall.c:303 [inline] bpf_map_area_alloc+0x5e/0x110 kernel/bpf/syscall.c:316 prealloc_elems_and_freelist+0x86/0x1c0 kernel/bpf/stackmap.c:51 stack_map_alloc+0x33a/0x4c0 kernel/bpf/stackmap.c:114 map_create+0x877/0x12f0 kernel/bpf/syscall.c:1247 __sys_bpf+0x651/0x890 kernel/bpf/syscall.c:5459 __do_sys_bpf kernel/bpf/syscall.c:5581 [inline] __se_sys_bpf kernel/bpf/syscall.c:5579 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5579 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:46 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2721 [inline] call_rcu+0x153/0x950 kernel/rcu/tree.c:2837 nf_hook_entries_free net/netfilter/core.c:88 [inline] __nf_register_net_hook+0x788/0x910 net/netfilter/core.c:457 nf_register_net_hook+0xb2/0x190 net/netfilter/core.c:578 nf_register_net_hooks+0x44/0x1b0 net/netfilter/core.c:594 ipt_register_table+0x53d/0x7d0 net/ipv4/netfilter/ip_tables.c:1781 iptable_mangle_table_init+0x41/0x60 net/ipv4/netfilter/iptable_mangle.c:91 xt_find_table_lock+0x306/0x3e0 net/netfilter/x_tables.c:1282 xt_request_find_table_lock+0x26/0x100 net/netfilter/x_tables.c:1307 get_info net/ipv4/netfilter/ip_tables.c:963 [inline] do_ipt_get_ctl+0x717/0x1200 net/ipv4/netfilter/ip_tables.c:1659 nf_getsockopt+0x262/0x280 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x19f/0x230 net/ipv4/ip_sockglue.c:1790 do_sock_getsockopt+0x379/0x450 net/socket.c:2383 __sys_getsockopt net/socket.c:2412 [inline] __do_sys_getsockopt net/socket.c:2422 [inline] __se_sys_getsockopt net/socket.c:2419 [inline] __x64_sys_getsockopt+0x1d6/0x280 net/socket.c:2419 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88802ece9c00 which belongs to the cache kmalloc-cg-128 of size 128 The buggy address is located 96 bytes inside of allocated 120-byte region [ffff88802ece9c00, ffff88802ece9c78) The buggy address belongs to the physical page: page:ffffea0000bb3a40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2ece9 memcg:ffff88801cf1f701 ksm flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff888017c4dc80 ffffea0001aebec0 0000000000000003 raw: 0000000000000000 0000000080100010 00000001ffffffff ffff88801cf1f701 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 5865, tgid 5865 (syz-executor), ts 87018708063, free_ts 87017068833 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581 prep_new_page mm/page_alloc.c:1588 [inline] get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4500 alloc_slab_page+0x5d/0x160 mm/slub.c:1881 allocate_slab mm/slub.c:2028 [inline] new_slab+0x87/0x2d0 mm/slub.c:2081 ___slab_alloc+0xc5d/0x12f0 mm/slub.c:3253 __slab_alloc mm/slub.c:3339 [inline] __slab_alloc_node mm/slub.c:3392 [inline] slab_alloc_node mm/slub.c:3485 [inline] __kmem_cache_alloc_node+0x19e/0x250 mm/slub.c:3534 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0xa4/0x230 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] kzalloc include/linux/slab.h:721 [inline] __register_sysctl_table+0x6e/0x1240 fs/proc/proc_sysctl.c:1373 mpls_dev_sysctl_register+0x207/0x2f0 net/mpls/af_mpls.c:1406 mpls_add_dev net/mpls/af_mpls.c:1462 [inline] mpls_dev_notify+0x357/0x7a0 net/mpls/af_mpls.c:1602 notifier_call_chain+0x197/0x380 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2077 [inline] call_netdevice_notifiers net/core/dev.c:2091 [inline] register_netdevice+0x16a5/0x1bb0 net/core/dev.c:10351 __ip_tunnel_create+0x3bc/0x4d0 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x2df/0x790 net/ipv4/ip_tunnel.c:1104 ops_init+0x397/0x640 net/core/net_namespace.c:139 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1181 [inline] free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458 discard_slab mm/slub.c:2127 [inline] __unfreeze_partials+0x1cf/0x210 mm/slub.c:2667 put_cpu_partial+0x17c/0x250 mm/slub.c:2743 __slab_free+0x319/0x400 mm/slub.c:3700 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xd0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:306 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6e/0x4b0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] __kmem_cache_alloc_node+0x13a/0x250 mm/slub.c:3534 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:721 [inline] kset_create lib/kobject.c:965 [inline] kset_create_and_add+0x5a/0x160 lib/kobject.c:1008 register_queue_kobjects net/core/net-sysfs.c:1793 [inline] netdev_register_kobject+0x1b2/0x320 net/core/net-sysfs.c:2046 register_netdevice+0x12ee/0x1bb0 net/core/dev.c:10318 __ip_tunnel_create+0x3bc/0x4d0 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x2df/0x790 net/ipv4/ip_tunnel.c:1104 Memory state around the buggy address: ffff88802ece9b00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802ece9b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88802ece9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ^ ffff88802ece9c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802ece9d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================