================================================================== BUG: KASAN: slab-out-of-bounds in copy_array+0x96/0x100 kernel/bpf/verifier.c:1072 Write of size 16 at addr ffff8880291c0a80 by task syz-executor.1/24942 CPU: 0 PID: 24942 Comm: syz-executor.1 Not tainted 6.1.0-syzkaller-11554-g785d21ba2f44 #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+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x15e/0x45d mm/kasan/report.c:417 kasan_report+0xbf/0x1f0 mm/kasan/report.c:517 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x141/0x190 mm/kasan/generic.c:189 memcpy+0x3d/0x60 mm/kasan/shadow.c:66 copy_array+0x96/0x100 kernel/bpf/verifier.c:1072 copy_verifier_state+0xa9/0xc60 kernel/bpf/verifier.c:1250 pop_stack+0x8c/0x2f0 kernel/bpf/verifier.c:1314 do_check kernel/bpf/verifier.c:14031 [inline] do_check_common+0x5663/0xbca0 kernel/bpf/verifier.c:16289 do_check_main kernel/bpf/verifier.c:16352 [inline] bpf_check+0x7348/0xacc0 kernel/bpf/verifier.c:16936 bpf_prog_load+0x1543/0x2230 kernel/bpf/syscall.c:2619 __sys_bpf+0x1436/0x4ff0 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+0x79/0xc0 kernel/bpf/syscall.c:5081 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f6ee9a8c0d9 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:00007f6eea7ce168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f6ee9babf80 RCX: 00007f6ee9a8c0d9 RDX: 0000000000000048 RSI: 00000000200017c0 RDI: 0000000000000005 RBP: 00007f6ee9ae7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6ee9ccfb1f R14: 00007f6eea7ce300 R15: 0000000000022000 Allocated by task 24942: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_krealloc+0x145/0x180 mm/kasan/common.c:439 kasan_krealloc include/linux/kasan.h:231 [inline] __do_krealloc mm/slab_common.c:1361 [inline] krealloc+0xa8/0x100 mm/slab_common.c:1398 push_jmp_history+0x13e/0x330 kernel/bpf/verifier.c:2592 is_state_visited kernel/bpf/verifier.c:13552 [inline] do_check kernel/bpf/verifier.c:13752 [inline] do_check_common+0x50e5/0xbca0 kernel/bpf/verifier.c:16289 do_check_main kernel/bpf/verifier.c:16352 [inline] bpf_check+0x7348/0xacc0 kernel/bpf/verifier.c:16936 bpf_prog_load+0x1543/0x2230 kernel/bpf/syscall.c:2619 __sys_bpf+0x1436/0x4ff0 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+0x79/0xc0 kernel/bpf/syscall.c:5081 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff8880291c0a80 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 0 bytes inside of 16-byte region [ffff8880291c0a80, ffff8880291c0a90) The buggy address belongs to the physical page: page:ffffea0000a47000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x291c0 anon flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff8880120413c0 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080800080 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 12338434008, free_ts 12337462716 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x119c/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5549 alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2118 alloc_pages+0x233/0x270 mm/mempolicy.c:2280 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x350 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1a4/0x430 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0x4a/0xd0 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] kobject_get_path+0xc2/0x230 lib/kobject.c:147 kobject_uevent_env+0x257/0x1620 lib/kobject_uevent.c:529 kernel_add_sysfs_param kernel/params.c:816 [inline] param_sysfs_builtin kernel/params.c:851 [inline] param_sysfs_builtin_init+0x321/0x3fd kernel/params.c:985 do_one_initcall+0x141/0x790 init/main.c:1306 do_initcall_level init/main.c:1379 [inline] do_initcalls init/main.c:1395 [inline] do_basic_setup init/main.c:1414 [inline] kernel_init_freeable+0x6f9/0x782 init/main.c:1634 kernel_init+0x1e/0x1d0 init/main.c:1522 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+0x65c/0xc00 mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3464 __vunmap+0x85d/0xd30 mm/vmalloc.c:2727 free_work+0x5c/0x80 mm/vmalloc.c:100 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff8880291c0980: 00 07 fc fc 00 01 fc fc 00 01 fc fc 00 07 fc fc ffff8880291c0a00: 00 00 fc fc 00 07 fc fc 00 00 fc fc 00 00 fc fc >ffff8880291c0a80: 00 fc fc fc fa fb fc fc 00 00 fc fc 00 07 fc fc ^ ffff8880291c0b00: 00 06 fc fc 00 06 fc fc 00 06 fc fc 00 06 fc fc ffff8880291c0b80: 00 05 fc fc 00 05 fc fc 00 05 fc fc 00 00 fc fc ==================================================================