================================================================== BUG: KASAN: slab-out-of-bounds in btf_name_valid_section kernel/bpf/btf.c:829 [inline] BUG: KASAN: slab-out-of-bounds in btf_datasec_check_meta+0x8ff/0x910 kernel/bpf/btf.c:4698 Read of size 1 at addr ffff8880628a3328 by task syz.4.1209/9244 CPU: 1 UID: 0 PID: 9244 Comm: syz.4.1209 Not tainted 6.11.0-rc6-syzkaller-00048-gc7fb1692dc01 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 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 btf_name_valid_section kernel/bpf/btf.c:829 [inline] btf_datasec_check_meta+0x8ff/0x910 kernel/bpf/btf.c:4698 btf_check_meta kernel/bpf/btf.c:5180 [inline] btf_check_all_metas kernel/bpf/btf.c:5204 [inline] btf_parse_type_sec kernel/bpf/btf.c:5340 [inline] btf_parse kernel/bpf/btf.c:5732 [inline] btf_new_fd+0x173b/0x4ed0 kernel/bpf/btf.c:7650 bpf_btf_load kernel/bpf/syscall.c:5035 [inline] __sys_bpf+0x1632/0x4a00 kernel/bpf/syscall.c:5755 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline] __se_sys_bpf kernel/bpf/syscall.c:5815 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5815 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 RIP: 0033:0x7fbbff57cef9 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:00007fbc0037e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fbbff736130 RCX: 00007fbbff57cef9 RDX: 0000000000000020 RSI: 0000000020000c40 RDI: 0000000000000012 RBP: 00007fbbff5ef01e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fbbff736130 R15: 00007ffc207e0538 Allocated by task 9244: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4162 [inline] __kmalloc_node_noprof+0x211/0x430 mm/slub.c:4168 __kvmalloc_node_noprof+0x9d/0x1a0 mm/util.c:650 btf_parse kernel/bpf/btf.c:5708 [inline] btf_new_fd+0x620/0x4ed0 kernel/bpf/btf.c:7650 bpf_btf_load kernel/bpf/syscall.c:5035 [inline] __sys_bpf+0x1632/0x4a00 kernel/bpf/syscall.c:5755 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline] __se_sys_bpf kernel/bpf/syscall.c:5815 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5815 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 The buggy address belongs to the object at ffff8880628a3300 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes to the right of allocated 40-byte region [ffff8880628a3300, ffff8880628a3328) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x628a3 ksm flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000000 ffff88801ac418c0 ffffea0000c9b580 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 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5238, tgid 5238 (syz-executor), ts 110098829321, free_ts 110001145093 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500 prep_new_page mm/page_alloc.c:1508 [inline] get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x4e/0xf0 mm/slub.c:2325 allocate_slab mm/slub.c:2488 [inline] new_slab+0x84/0x260 mm/slub.c:2541 ___slab_alloc+0xdac/0x1870 mm/slub.c:3727 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3817 __slab_alloc_node mm/slub.c:3870 [inline] slab_alloc_node mm/slub.c:4029 [inline] __do_kmalloc_node mm/slub.c:4161 [inline] __kmalloc_noprof+0x367/0x400 mm/slub.c:4174 kmalloc_noprof include/linux/slab.h:685 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] kobject_get_path+0xd9/0x2b0 lib/kobject.c:161 kobject_uevent_env+0x289/0x1860 lib/kobject_uevent.c:545 netdev_queue_add_kobject net/core/net-sysfs.c:1797 [inline] netdev_queue_update_kobjects+0x185/0x640 net/core/net-sysfs.c:1838 register_queue_kobjects net/core/net-sysfs.c:1900 [inline] netdev_register_kobject+0x290/0x3f0 net/core/net-sysfs.c:2140 register_netdevice+0x1473/0x1e90 net/core/dev.c:10444 veth_newlink+0x4fb/0x9e0 drivers/net/veth.c:1860 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline] __rtnl_newlink+0x1197/0x1920 net/core/rtnetlink.c:3730 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3743 page last free pid 5240 tgid 5240 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1101 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2619 __put_partials+0x14c/0x170 mm/slub.c:3055 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:3992 [inline] slab_alloc_node mm/slub.c:4041 [inline] __kmalloc_cache_noprof+0x11e/0x300 mm/slub.c:4188 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] kobject_uevent_env+0x265/0x1860 lib/kobject_uevent.c:540 __kobject_del+0x168/0x1f0 lib/kobject.c:601 kobject_cleanup lib/kobject.c:680 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x327/0x5a0 lib/kobject.c:737 net_rx_queue_update_kobjects+0x478/0x5f0 net/core/net-sysfs.c:1174 netif_set_real_num_rx_queues+0x169/0x210 net/core/dev.c:2990 veth_init_queues+0x151/0x190 drivers/net/veth.c:1760 veth_newlink+0x54c/0x9e0 drivers/net/veth.c:1872 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline] __rtnl_newlink+0x1197/0x1920 net/core/rtnetlink.c:3730 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6647 Memory state around the buggy address: ffff8880628a3200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880628a3280: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc >ffff8880628a3300: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880628a3380: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ffff8880628a3400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================