================================================================== BUG: KASAN: slab-out-of-bounds in btf_name_valid_section kernel/bpf/btf.c:824 [inline] BUG: KASAN: slab-out-of-bounds in btf_datasec_check_meta+0x2c9/0x9a0 kernel/bpf/btf.c:4693 Read of size 1 at addr ffff88802dd3d5c4 by task syz.3.115/5877 CPU: 1 UID: 0 PID: 5877 Comm: syz.3.115 Not tainted 6.11.0-rc3-next-20240816-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 btf_name_valid_section kernel/bpf/btf.c:824 [inline] btf_datasec_check_meta+0x2c9/0x9a0 kernel/bpf/btf.c:4693 btf_check_meta kernel/bpf/btf.c:5175 [inline] btf_check_all_metas kernel/bpf/btf.c:5199 [inline] btf_parse_type_sec+0x4d5/0x2620 kernel/bpf/btf.c:5335 btf_parse kernel/bpf/btf.c:5727 [inline] btf_new_fd+0x43f/0xd30 kernel/bpf/btf.c:7648 __sys_bpf+0x6ef/0x810 kernel/bpf/syscall.c:5672 __do_sys_bpf kernel/bpf/syscall.c:5734 [inline] __se_sys_bpf kernel/bpf/syscall.c:5732 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5732 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6a3d979e79 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6a3e82c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f6a3db15f80 RCX: 00007f6a3d979e79 RDX: 0000000000000020 RSI: 00000000200004c0 RDI: 0000000000000012 RBP: 00007f6a3d9e7916 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f6a3db15f80 R15: 00007ffe181714c8 Allocated by task 5877: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4202 [inline] __kmalloc_node_noprof+0x22a/0x440 mm/slub.c:4208 __kvmalloc_node_noprof+0x72/0x1b0 mm/util.c:658 btf_parse kernel/bpf/btf.c:5703 [inline] btf_new_fd+0x265/0xd30 kernel/bpf/btf.c:7648 __sys_bpf+0x6ef/0x810 kernel/bpf/syscall.c:5672 __do_sys_bpf kernel/bpf/syscall.c:5734 [inline] __se_sys_bpf kernel/bpf/syscall.c:5732 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5732 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88802dd3d580 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes to the right of allocated 68-byte region [ffff88802dd3d580, ffff88802dd3d5c4) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2dd3d ksm flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000000 ffff888015841280 ffffea00008d7180 dead000000000003 raw: 0000000000000000 0000000080200020 00000001fdffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5279, tgid 5279 (kworker/1:4), ts 58736117097, free_ts 58727520023 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1518 prep_new_page mm/page_alloc.c:1526 [inline] get_page_from_freelist+0x3004/0x30c0 mm/page_alloc.c:3477 __alloc_pages_noprof+0x29e/0x780 mm/page_alloc.c:4744 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2364 allocate_slab+0x5a/0x2f0 mm/slub.c:2527 new_slab mm/slub.c:2580 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3767 __slab_alloc+0x58/0xa0 mm/slub.c:3857 __slab_alloc_node mm/slub.c:3910 [inline] slab_alloc_node mm/slub.c:4069 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4228 kmalloc_noprof include/linux/slab.h:681 [inline] dst_cow_metrics_generic+0x56/0x1c0 net/core/dst.c:178 dst_metrics_write_ptr include/net/dst.h:133 [inline] dst_metric_set include/net/dst.h:194 [inline] icmp6_dst_alloc+0x270/0x420 net/ipv6/route.c:3288 mld_sendpack+0x6a3/0xdb0 net/ipv6/mcast.c:1807 mld_send_cr net/ipv6/mcast.c:2119 [inline] mld_ifc_work+0x7d9/0xd90 net/ipv6/mcast.c:2650 process_one_work kernel/workqueue.c:3232 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3313 worker_thread+0x86d/0xd10 kernel/workqueue.c:3390 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 page last free pid 5226 tgid 5226 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1099 [inline] free_unref_page+0xc07/0xd90 mm/page_alloc.c:2652 discard_slab mm/slub.c:2626 [inline] __put_partials+0xeb/0x130 mm/slub.c:3094 put_cpu_partial+0x17c/0x250 mm/slub.c:3169 __slab_free+0x2ea/0x3d0 mm/slub.c:4387 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4032 [inline] slab_alloc_node mm/slub.c:4081 [inline] __kmalloc_cache_noprof+0x132/0x2c0 mm/slub.c:4228 kmalloc_noprof include/linux/slab.h:681 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:642 [inline] netdevice_event+0x37d/0x950 drivers/infiniband/core/roce_gid_mgmt.c:801 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2032 [inline] call_netdevice_notifiers net/core/dev.c:2046 [inline] dev_set_mac_address+0x3d9/0x510 net/core/dev.c:9101 dev_set_mac_address_user+0x31/0x50 net/core/dev.c:9115 do_setlink+0x8b6/0x41f0 net/core/rtnetlink.c:2855 __rtnl_newlink net/core/rtnetlink.c:3696 [inline] rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6647 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 Memory state around the buggy address: ffff88802dd3d480: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ffff88802dd3d500: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff88802dd3d580: 00 00 00 00 00 00 00 00 04 fc fc fc fc fc fc fc ^ ffff88802dd3d600: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff88802dd3d680: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ==================================================================