================================================================== BUG: KASAN: slab-out-of-bounds in copy_array+0x96/0x100 kernel/bpf/verifier.c:1032 Write of size 232 at addr ffff88807bdad600 by task syz-executor.1/5406 CPU: 1 PID: 5406 Comm: syz-executor.1 Not tainted 6.1.0-rc6-next-20221124-syzkaller #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:253 [inline] print_report+0x15e/0x45d mm/kasan/report.c:364 kasan_report+0xbf/0x1f0 mm/kasan/report.c:464 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:1032 copy_verifier_state+0xa9/0xbe0 kernel/bpf/verifier.c:1210 pop_stack+0x8c/0x2f0 kernel/bpf/verifier.c:1273 do_check kernel/bpf/verifier.c:13733 [inline] do_check_common+0x372b/0xc5e0 kernel/bpf/verifier.c:15991 do_check_main kernel/bpf/verifier.c:16054 [inline] bpf_check+0x7371/0xad00 kernel/bpf/verifier.c:16624 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: 0033:0x7f2cc0c8c0d9 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:00007f2cc1a5c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f2cc0dac120 RCX: 00007f2cc0c8c0d9 RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 RBP: 00007f2cc0ce7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffd63ea5df R14: 00007f2cc1a5c300 R15: 0000000000022000 Allocated by task 5406: 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:376 [inline] ____kasan_kmalloc mm/kasan/common.c:335 [inline] __kasan_krealloc+0x145/0x180 mm/kasan/common.c:444 kasan_krealloc include/linux/kasan.h:232 [inline] __do_krealloc mm/slab_common.c:1348 [inline] krealloc+0xa8/0x100 mm/slab_common.c:1385 push_jmp_history+0x89/0x260 kernel/bpf/verifier.c:2528 is_state_visited kernel/bpf/verifier.c:13269 [inline] do_check kernel/bpf/verifier.c:13466 [inline] do_check_common+0x4b47/0xc5e0 kernel/bpf/verifier.c:15991 do_check_main kernel/bpf/verifier.c:16054 [inline] bpf_check+0x7371/0xad00 kernel/bpf/verifier.c:16624 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 ffff88807bdad600 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes inside of 256-byte region [ffff88807bdad600, ffff88807bdad700) The buggy address belongs to the physical page: page:ffffea0001ef6b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7bdac head:ffffea0001ef6b00 order:1 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012441b40 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5406, tgid 5402 (syz-executor.1), ts 63789454420, free_ts 63785502382 prep_new_page mm/page_alloc.c:2541 [inline] get_page_from_freelist+0x119c/0x2cd0 mm/page_alloc.c:4293 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5551 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2285 alloc_slab_page mm/slub.c:1833 [inline] allocate_slab+0x25e/0x350 mm/slub.c:1980 new_slab mm/slub.c:2033 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3211 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3310 slab_alloc_node mm/slub.c:3395 [inline] __kmem_cache_alloc_node+0x1a9/0x430 mm/slub.c:3472 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc_node_track_caller+0x4b/0xc0 mm/slab_common.c:975 copy_array+0xe8/0x100 kernel/bpf/verifier.c:1027 copy_stack_state kernel/bpf/verifier.c:1080 [inline] copy_func_state kernel/bpf/verifier.c:1201 [inline] copy_verifier_state+0x769/0xbe0 kernel/bpf/verifier.c:1238 push_stack+0x1de/0x560 kernel/bpf/verifier.c:1309 check_cond_jmp_op kernel/bpf/verifier.c:11477 [inline] do_check kernel/bpf/verifier.c:13744 [inline] do_check_common+0x6919/0xc5e0 kernel/bpf/verifier.c:15991 do_check_main kernel/bpf/verifier.c:16054 [inline] bpf_check+0x7371/0xad00 kernel/bpf/verifier.c:16624 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 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1448 [inline] free_pcp_prepare+0x65c/0xc00 mm/page_alloc.c:1498 free_unref_page_prepare mm/page_alloc.c:3379 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3474 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2617 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x66/0x90 mm/kasan/common.c:307 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3433 [inline] __kmem_cache_alloc_node+0x1ec/0x430 mm/slub.c:3472 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc_node_track_caller+0x4b/0xc0 mm/slab_common.c:975 __do_krealloc mm/slab_common.c:1352 [inline] krealloc+0x5e/0x100 mm/slab_common.c:1385 push_jmp_history+0x89/0x260 kernel/bpf/verifier.c:2528 is_state_visited kernel/bpf/verifier.c:13326 [inline] do_check kernel/bpf/verifier.c:13466 [inline] do_check_common+0x345b/0xc5e0 kernel/bpf/verifier.c:15991 do_check_main kernel/bpf/verifier.c:16054 [inline] bpf_check+0x7371/0xad00 kernel/bpf/verifier.c:16624 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 Memory state around the buggy address: ffff88807bdad500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807bdad580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807bdad600: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807bdad680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807bdad700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================