================================================================== BUG: KASAN: slab-out-of-bounds in copy_array kernel/bpf/verifier.c:1072 [inline] BUG: KASAN: slab-out-of-bounds in copy_verifier_state+0x130/0xbe0 kernel/bpf/verifier.c:1250 Write of size 80 at addr ffff888029f26d80 by task syz-executor.4/5523 CPU: 1 PID: 5523 Comm: syz-executor.4 Not tainted 6.2.0-rc1-syzkaller-00084-gc8451c141e07 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:306 print_report+0x107/0x220 mm/kasan/report.c:417 kasan_report+0x139/0x170 mm/kasan/report.c:517 kasan_check_range+0x2a7/0x2e0 mm/kasan/generic.c:189 memcpy+0x3c/0x60 mm/kasan/shadow.c:66 copy_array kernel/bpf/verifier.c:1072 [inline] copy_verifier_state+0x130/0xbe0 kernel/bpf/verifier.c:1250 pop_stack kernel/bpf/verifier.c:1314 [inline] do_check+0x8e51/0x107b0 kernel/bpf/verifier.c:14031 do_check_common+0x909/0x1800 kernel/bpf/verifier.c:16289 do_check_main kernel/bpf/verifier.c:16352 [inline] bpf_check+0x107e2/0x16170 kernel/bpf/verifier.c:16936 bpf_prog_load+0x1306/0x1be0 kernel/bpf/syscall.c:2619 __sys_bpf+0x396/0x6d0 kernel/bpf/syscall.c:4979 __do_sys_bpf kernel/bpf/syscall.c:5083 [inline] __se_sys_bpf kernel/bpf/syscall.c:5081 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5081 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f7f95a8c0a9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7f967ad168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f7f95babf80 RCX: 00007f7f95a8c0a9 RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 RBP: 00007f7f95ae7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffccf06a69f R14: 00007f7f967ad300 R15: 0000000000022000 Allocated by task 5523: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_krealloc+0xbf/0xf0 mm/kasan/common.c:439 kasan_krealloc include/linux/kasan.h:231 [inline] __do_krealloc mm/slab_common.c:1361 [inline] krealloc+0xb2/0x110 mm/slab_common.c:1398 push_jmp_history kernel/bpf/verifier.c:2592 [inline] is_state_visited kernel/bpf/verifier.c:13552 [inline] do_check+0x9433/0x107b0 kernel/bpf/verifier.c:13752 do_check_common+0x909/0x1800 kernel/bpf/verifier.c:16289 do_check_main kernel/bpf/verifier.c:16352 [inline] bpf_check+0x107e2/0x16170 kernel/bpf/verifier.c:16936 bpf_prog_load+0x1306/0x1be0 kernel/bpf/syscall.c:2619 __sys_bpf+0x396/0x6d0 kernel/bpf/syscall.c:4979 __do_sys_bpf kernel/bpf/syscall.c:5083 [inline] __se_sys_bpf kernel/bpf/syscall.c:5081 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5081 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888029f26d80 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of 96-byte region [ffff888029f26d80, ffff888029f26de0) The buggy address belongs to the physical page: page:ffffea0000a7c980 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29f26 anon flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff888012841780 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080200020 00000001ffffffff 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 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 7, tgid 7 (kworker/0:0), ts 261268409672, free_ts 261264934482 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0xbd/0x190 mm/slub.c:1851 allocate_slab+0x5e/0x3c0 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0x7f4/0xeb0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x25b/0x340 mm/slub.c:3491 kmalloc_trace+0x26/0x60 mm/slab_common.c:1062 kmalloc include/linux/slab.h:580 [inline] dst_cow_metrics_generic+0x52/0x1c0 net/core/dst.c:199 dst_metrics_write_ptr include/net/dst.h:119 [inline] dst_metric_set include/net/dst.h:180 [inline] icmp6_dst_alloc+0x30c/0x4d0 net/ipv6/route.c:3274 ndisc_send_skb+0x352/0xfd0 net/ipv6/ndisc.c:488 ndisc_send_ns+0xc8/0x150 net/ipv6/ndisc.c:666 addrconf_dad_work+0xb3a/0x16e0 net/ipv6/addrconf.c:4171 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare+0x751/0x780 mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page+0x19/0x4c0 mm/page_alloc.c:3464 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x1e0/0x340 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0x9e/0x190 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] tomoyo_realpath_from_path+0xcd/0x5f0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x255/0x4f0 security/tomoyo/file.c:771 security_file_open+0x50/0x560 security/security.c:1718 do_dentry_open+0x306/0x11b0 fs/open.c:869 do_open fs/namei.c:3557 [inline] path_openat+0x25cc/0x2de0 fs/namei.c:3714 do_filp_open+0x275/0x500 fs/namei.c:3741 do_sys_openat2+0x13b/0x500 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 Memory state around the buggy address: ffff888029f26c80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888029f26d00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff888029f26d80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888029f26e00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff888029f26e80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================