================================================================== BUG: KASAN: slab-out-of-bounds in copy_array+0x8a/0xe8 kernel/bpf/verifier.c:1072 Write of size 80 at addr ff60000011f83a80 by task syz-executor.0/3774 CPU: 1 PID: 3774 Comm: syz-executor.0 Tainted: G W 6.2.0-rc1-syzkaller #0 Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:121 [] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:127 [] __dump_stack lib/dump_stack.c:88 [inline] [] dump_stack_lvl+0xe0/0x14c lib/dump_stack.c:106 [] print_address_description mm/kasan/report.c:306 [inline] [] print_report+0x1e4/0x4c0 mm/kasan/report.c:417 [] kasan_report+0xb8/0xe6 mm/kasan/report.c:517 [] check_region_inline mm/kasan/generic.c:173 [inline] [] kasan_check_range+0x32/0x148 mm/kasan/generic.c:189 [] memcpy+0x32/0x64 mm/kasan/shadow.c:66 [] copy_array+0x8a/0xe8 kernel/bpf/verifier.c:1072 [] copy_verifier_state+0x6c/0x462 kernel/bpf/verifier.c:1250 [] pop_stack kernel/bpf/verifier.c:1314 [inline] [] do_check kernel/bpf/verifier.c:14031 [inline] [] do_check_common+0x397a/0x6608 kernel/bpf/verifier.c:16289 [] do_check_main kernel/bpf/verifier.c:16352 [inline] [] bpf_check+0x45b2/0x5a5a kernel/bpf/verifier.c:16936 [] bpf_prog_load+0xc90/0x12b0 kernel/bpf/syscall.c:2619 [] __sys_bpf+0x622/0x31d2 kernel/bpf/syscall.c:4979 [] __do_sys_bpf kernel/bpf/syscall.c:5083 [inline] [] sys_bpf+0x28/0x36 kernel/bpf/syscall.c:5081 [] ret_from_syscall+0x0/0x2 Allocated by task 3774: stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122 kasan_save_stack+0x2c/0x5a mm/kasan/common.c:45 kasan_set_track+0x1a/0x26 mm/kasan/common.c:52 kasan_save_alloc_info+0x1a/0x24 mm/kasan/generic.c:507 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_krealloc+0xfa/0x11a mm/kasan/common.c:439 kasan_krealloc include/linux/kasan.h:231 [inline] __do_krealloc mm/slab_common.c:1361 [inline] krealloc+0x82/0xae mm/slab_common.c:1398 push_jmp_history+0xd2/0x140 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+0x47be/0x6608 kernel/bpf/verifier.c:16289 do_check_main kernel/bpf/verifier.c:16352 [inline] bpf_check+0x45b2/0x5a5a kernel/bpf/verifier.c:16936 bpf_prog_load+0xc90/0x12b0 kernel/bpf/syscall.c:2619 __sys_bpf+0x622/0x31d2 kernel/bpf/syscall.c:4979 __do_sys_bpf kernel/bpf/syscall.c:5083 [inline] sys_bpf+0x28/0x36 kernel/bpf/syscall.c:5081 ret_from_syscall+0x0/0x2 The buggy address belongs to the object at ff60000011f83a80 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of 96-byte region [ff60000011f83a80, ff60000011f83ae0) The buggy address belongs to the physical page: page:ff1c0000024860c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x92183 flags: 0xffe000000000200(slab|node=0|zone=0|lastcpupid=0x7ff) raw: 0ffe000000000200 ff60000008201780 ff1c0000023ec4c0 0000000000000002 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 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 2842, tgid 2842 (kworker/1:3), ts 608664491300, free_ts 608541723800 __set_page_owner+0x32/0x182 mm/page_owner.c:190 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0xf8/0x11a mm/page_alloc.c:2524 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0xc0e/0x1118 mm/page_alloc.c:4283 __alloc_pages+0x1b0/0x165a mm/page_alloc.c:5549 alloc_pages+0x132/0x25e mm/mempolicy.c:2286 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab mm/slub.c:1998 [inline] new_slab+0x270/0x382 mm/slub.c:2051 ___slab_alloc+0x57e/0xaa6 mm/slub.c:3193 __slab_alloc.constprop.0+0x5a/0x98 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0xf2/0x2e4 mm/slub.c:3491 kmalloc_trace+0x24/0x56 mm/slab_common.c:1062 kmalloc include/linux/slab.h:580 [inline] dst_cow_metrics_generic+0x4a/0x1c2 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+0x1e8/0x294 net/ipv6/route.c:3274 ndisc_send_skb+0xecc/0x11d0 net/ipv6/ndisc.c:488 ndisc_send_rs+0xa8/0x378 net/ipv6/ndisc.c:718 addrconf_dad_completed+0x276/0x836 net/ipv6/addrconf.c:4248 addrconf_dad_work+0x574/0xc74 net/ipv6/addrconf.c:4157 page last free stack trace: __reset_page_owner+0x4a/0xf8 mm/page_owner.c:148 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare+0x254/0x48e mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page_list+0x11e/0x736 mm/page_alloc.c:3510 release_pages+0x85a/0xbb2 mm/swap.c:1076 free_pages_and_swap_cache+0x76/0x88 mm/swap_state.c:311 tlb_batch_pages_flush+0x86/0x10c mm/mmu_gather.c:97 tlb_flush_mmu_free mm/mmu_gather.c:292 [inline] tlb_flush_mmu mm/mmu_gather.c:299 [inline] tlb_finish_mmu+0xcc/0x280 mm/mmu_gather.c:391 shift_arg_pages+0x206/0x2d2 fs/exec.c:732 setup_arg_pages+0x2c6/0x4ca fs/exec.c:831 load_elf_binary+0x812/0x32b2 fs/binfmt_elf.c:1013 search_binary_handler fs/exec.c:1735 [inline] exec_binprm fs/exec.c:1777 [inline] bprm_execve fs/exec.c:1851 [inline] bprm_execve+0x5bc/0x116c fs/exec.c:1808 kernel_execve+0x250/0x2e8 fs/exec.c:2016 call_usermodehelper_exec_async+0x1c0/0x2dc kernel/umh.c:113 ret_from_exception+0x0/0x1a arch/riscv/kernel/entry.S:249 Memory state around the buggy address: ff60000011f83980: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ff60000011f83a00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ff60000011f83a80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ff60000011f83b00: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ff60000011f83b80: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ================================================================== warn_alloc: 1 callbacks suppressed syz-executor.0: vmalloc error: size 4096, vm_struct allocation failed, mode:0xcc0(GFP_KERNEL), nodemask=(null),cpuset=syz0,mems_allowed=0 CPU: 1 PID: 3774 Comm: syz-executor.0 Tainted: G B W 6.2.0-rc1-syzkaller #0 Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:121 [] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:127 [] __dump_stack lib/dump_stack.c:88 [inline] [] dump_stack_lvl+0xe0/0x14c lib/dump_stack.c:106 [] dump_stack+0x1c/0x24 lib/dump_stack.c:113 [] warn_alloc+0x168/0x22c mm/page_alloc.c:4356 [] __vmalloc_node_range+0xb6c/0xdb4 mm/vmalloc.c:3192 [] bpf_jit_alloc_exec+0x46/0x52 arch/riscv/net/bpf_jit_core.c:190 [] bpf_jit_binary_alloc+0x96/0x13c kernel/bpf/core.c:1025 [] bpf_int_jit_compile+0x886/0xaa6 arch/riscv/net/bpf_jit_core.c:112 [] bpf_prog_select_runtime+0x1a2/0x22e kernel/bpf/core.c:2190 [] bpf_prog_load+0xcb4/0x12b0 kernel/bpf/syscall.c:2623 [] __sys_bpf+0x622/0x31d2 kernel/bpf/syscall.c:4979 [] __do_sys_bpf kernel/bpf/syscall.c:5083 [inline] [] sys_bpf+0x28/0x36 kernel/bpf/syscall.c:5081 [] ret_from_syscall+0x0/0x2 Mem-Info: active_anon:55233 inactive_anon:58 isolated_anon:0 active_file:0 inactive_file:7220 isolated_file:0 unevictable:768 dirty:20 writeback:0 slab_reclaimable:5442 slab_unreclaimable:23719 mapped:8636 shmem:853 pagetables:304 sec_pagetables:0 bounce:0 kernel_misc_reclaimable:0 free:202664 free_pcp:701 free_cma:4096 Node 0 active_anon:220932kB inactive_anon:232kB active_file:0kB inactive_file:28880kB unevictable:3072kB isolated(anon):0kB isolated(file):0kB mapped:34544kB dirty:80kB writeback:0kB shmem:3412kB writeback_tmp:0kB kernel_stack:5416kB pagetables:1216kB sec_pagetables:0kB all_unreclaimable? no Node 0 DMA32 free:810656kB boost:0kB min:4656kB low:6012kB high:7368kB reserved_highatomic:0KB active_anon:220932kB inactive_anon:232kB active_file:0kB inactive_file:28880kB unevictable:3072kB writepending:80kB present:2095104kB managed:1359004kB mlocked:0kB bounce:0kB free_pcp:2804kB local_pcp:844kB free_cma:16384kB lowmem_reserve[]: 0 0 0 Node 0 DMA32: 390*4kB (UME) 403*8kB (UM) 191*16kB (UME) 82*32kB (UME) 29*64kB (UME) 17*128kB (UME) 12*256kB (M) 9*512kB (ME) 6*1024kB (ME) 4*2048kB (UMC) 189*4096kB (MC) = 810656kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB 8073 total pagecache pages 0 pages in swap cache Free swap = 0kB Total swap = 0kB 523776 pages RAM 0 pages HighMem/MovableOnly 184025 pages reserved 4096 pages cma reserved