================================================================== BUG: KASAN: slab-out-of-bounds in copy_array+0x8a/0xe8 kernel/bpf/verifier.c:1072 Write of size 80 at addr ff600000143ba680 by task syz-executor.1/3708 CPU: 0 PID: 3708 Comm: syz-executor.1 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 3708: 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 ff600000143ba680 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of 96-byte region [ff600000143ba680, ff600000143ba6e0) The buggy address belongs to the physical page: page:ff1c000002516e80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x945ba anon flags: 0xffe000000000200(slab|node=0|zone=0|lastcpupid=0x7ff) raw: 0ffe000000000200 ff60000008201780 ff1c0000024f02c0 0000000000000005 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 3505, tgid 3505 (kworker/1:3), ts 992823487400, free_ts 986223840900 __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] kzalloc include/linux/slab.h:720 [inline] nsim_fib6_rt_create drivers/net/netdevsim/fib.c:547 [inline] nsim_fib6_rt_insert drivers/net/netdevsim/fib.c:752 [inline] nsim_fib6_event drivers/net/netdevsim/fib.c:856 [inline] nsim_fib_event drivers/net/netdevsim/fib.c:889 [inline] nsim_fib_event_work+0xefc/0x1a20 drivers/net/netdevsim/fib.c:1492 process_one_work+0x660/0x102e kernel/workqueue.c:2289 worker_thread+0x362/0x878 kernel/workqueue.c:2436 kthread+0x19c/0x1f8 kernel/kthread.c:376 ret_from_exception+0x0/0x1a arch/riscv/kernel/entry.S:249 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 exit_mmap+0x190/0x686 mm/mmap.c:3096 __mmput+0x98/0x290 kernel/fork.c:1207 mmput+0x74/0x88 kernel/fork.c:1229 exit_mm kernel/exit.c:563 [inline] do_exit+0x602/0x17be kernel/exit.c:854 do_group_exit+0x8e/0x15e kernel/exit.c:1012 __do_sys_exit_group kernel/exit.c:1023 [inline] __wake_up_parent+0x0/0x4a kernel/exit.c:1021 ret_from_syscall+0x0/0x2 Memory state around the buggy address: ff600000143ba580: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ff600000143ba600: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ff600000143ba680: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ff600000143ba700: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ff600000143ba780: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ================================================================== warn_alloc: 3 callbacks suppressed syz-executor.1: vmalloc error: size 4096, vm_struct allocation failed, mode:0xcc0(GFP_KERNEL), nodemask=(null),cpuset=syz1,mems_allowed=0 CPU: 0 PID: 3708 Comm: syz-executor.1 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:59080 inactive_anon:58 isolated_anon:0 active_file:0 inactive_file:7250 isolated_file:0 unevictable:768 dirty:11 writeback:0 slab_reclaimable:5417 slab_unreclaimable:23526 mapped:8728 shmem:840 pagetables:326 sec_pagetables:0 bounce:0 kernel_misc_reclaimable:0 free:198541 free_pcp:876 free_cma:4096 Node 0 active_anon:236320kB inactive_anon:232kB active_file:0kB inactive_file:29000kB unevictable:3072kB isolated(anon):0kB isolated(file):0kB mapped:34912kB dirty:44kB writeback:0kB shmem:3360kB writeback_tmp:0kB kernel_stack:5440kB pagetables:1304kB sec_pagetables:0kB all_unreclaimable? no Node 0 DMA32 free:794164kB boost:0kB min:4656kB low:6012kB high:7368kB reserved_highatomic:0KB active_anon:236320kB inactive_anon:232kB active_file:0kB inactive_file:29000kB unevictable:3072kB writepending:44kB present:2095104kB managed:1359004kB mlocked:0kB bounce:0kB free_pcp:3504kB local_pcp:1676kB free_cma:16384kB lowmem_reserve[]: 0 0 0 Node 0 DMA32: 431*4kB (UME) 243*8kB (UME) 122*16kB (UME) 62*32kB (UME) 24*64kB (UME) 15*128kB (ME) 9*256kB (UME) 5*512kB (ME) 4*1024kB (ME) 4*2048kB (UMC) 187*4096kB (MC) = 794164kB 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 8090 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