================================================================== 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+0x2c9/0x9a0 kernel/bpf/btf.c:4698 Read of size 1 at addr ffff888034ad12ba by task syz.3.660/8535 CPU: 1 UID: 0 PID: 8535 Comm: syz.3.660 Not tainted 6.11.0-rc6-syzkaller-00219-g3e705251d998 #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+0x241/0x360 lib/dump_stack.c:119 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:829 [inline] btf_datasec_check_meta+0x2c9/0x9a0 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+0x4d5/0x2620 kernel/bpf/btf.c:5340 btf_parse kernel/bpf/btf.c:5732 [inline] btf_new_fd+0x43f/0xd30 kernel/bpf/btf.c:7650 __sys_bpf+0x6ef/0x810 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+0x7c/0x90 kernel/bpf/syscall.c:5815 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: 0033:0x7f16a557def9 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:00007f16a6295038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f16a5736058 RCX: 00007f16a557def9 RDX: 0000000000000028 RSI: 0000000020000400 RDI: 0000000000000012 RBP: 00007f16a55f0b76 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f16a5736058 R15: 00007fffd91b1588 Allocated by task 8535: 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:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4162 [inline] __kmalloc_node_noprof+0x22a/0x440 mm/slub.c:4168 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:650 btf_parse kernel/bpf/btf.c:5708 [inline] btf_new_fd+0x265/0xd30 kernel/bpf/btf.c:7650 __sys_bpf+0x6ef/0x810 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+0x7c/0x90 kernel/bpf/syscall.c:5815 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 ffff888034ad1280 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes to the right of allocated 58-byte region [ffff888034ad1280, ffff888034ad12ba) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x34ad1 ksm flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000000 ffff88801ac418c0 ffffea0000a7e9c0 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 1, tgid 1 (swapper/0), ts 23241082338, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1500 prep_new_page mm/page_alloc.c:1508 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3446 __alloc_pages_noprof+0x256/0x6c0 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+0x5f/0x120 mm/slub.c:2325 allocate_slab+0x5a/0x2f0 mm/slub.c:2488 new_slab mm/slub.c:2541 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3727 __slab_alloc+0x58/0xa0 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+0x25a/0x400 mm/slub.c:4174 kmalloc_noprof include/linux/slab.h:685 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] kobject_get_path+0xb8/0x230 lib/kobject.c:161 kobject_uevent_env+0x2a5/0x8e0 lib/kobject_uevent.c:545 driver_register+0x2d6/0x320 drivers/base/driver.c:254 __platform_driver_register drivers/base/platform.c:867 [inline] __platform_driver_probe+0x11d/0x250 drivers/base/platform.c:942 do_one_initcall+0x248/0x880 init/main.c:1267 do_initcall_level+0x157/0x210 init/main.c:1329 do_initcalls+0x3f/0x80 init/main.c:1345 kernel_init_freeable+0x435/0x5d0 init/main.c:1578 page_owner free stack trace missing Memory state around the buggy address: ffff888034ad1180: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ffff888034ad1200: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc >ffff888034ad1280: 00 00 00 00 00 00 00 02 fc fc fc fc fc fc fc fc ^ ffff888034ad1300: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ffff888034ad1380: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ==================================================================