================================================================== BUG: KASAN: slab-out-of-bounds in copy_array+0x8a/0xe8 kernel/bpf/verifier.c:1072 Write of size 80 at addr ff6000002c9ec000 by task syz-executor.0/4012 CPU: 0 PID: 4012 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 4012: 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 ff6000002c9ec000 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of 96-byte region [ff6000002c9ec000, ff6000002c9ec060) The buggy address belongs to the physical page: page:ff1c000002b2fb00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xacbec anon flags: 0xffe000000000200(slab|node=0|zone=0|lastcpupid=0x7ff) raw: 0ffe000000000200 ff60000008201780 ff1c00000251c040 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 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 2879, tgid 2879 (syz-executor.1), ts 1072141514900, free_ts 1072080849100 __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_fib_event_schedule_work drivers/net/netdevsim/fib.c:990 [inline] nsim_fib_event_nb+0x17e/0x906 drivers/net/netdevsim/fib.c:1043 notifier_call_chain+0xb8/0x188 kernel/notifier.c:87 atomic_notifier_call_chain+0x76/0x1a8 kernel/notifier.c:225 call_fib_notifiers+0x12c/0x2d2 net/core/fib_notifier.c:35 call_fib4_notifiers+0x7e/0xe0 net/ipv4/fib_notifier.c:26 call_fib_entry_notifiers net/ipv4/fib_trie.c:106 [inline] fib_table_insert+0x95c/0xeec net/ipv4/fib_trie.c:1394 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+0x60/0x2ae mm/page_alloc.c:3464 free_the_page mm/page_alloc.c:750 [inline] __free_pages+0xd6/0x106 mm/page_alloc.c:5635 free_pages.part.0+0xd8/0x13a mm/page_alloc.c:5646 free_pages+0xe/0x18 mm/page_alloc.c:5643 pgd_free include/asm-generic/pgalloc.h:193 [inline] mm_free_pgd kernel/fork.c:737 [inline] __mmdrop+0x88/0x2f0 kernel/fork.c:795 mmdrop include/linux/sched/mm.h:50 [inline] __mmput+0x28e/0x290 kernel/fork.c:1218 mmput+0x74/0x88 kernel/fork.c:1229 free_bprm+0xc6/0x1f2 fs/exec.c:1488 kernel_execve+0x260/0x2e8 fs/exec.c:2018 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: ff6000002c9ebf00: 00 fc fc 00 00 00 00 00 fc fc 00 00 00 00 00 fc ff6000002c9ebf80: fc 00 00 00 00 00 fc fc 00 00 00 00 00 fc fc fc >ff6000002c9ec000: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ff6000002c9ec080: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ff6000002c9ec100: 00 00 00 00 00 00 00 00 00 00 00 00 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: 0 PID: 4012 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:59178 inactive_anon:80 isolated_anon:0 active_file:0 inactive_file:7433 isolated_file:0 unevictable:768 dirty:13 writeback:0 slab_reclaimable:5473 slab_unreclaimable:23980 mapped:8760 shmem:909 pagetables:341 sec_pagetables:0 bounce:0 kernel_misc_reclaimable:0 free:199935 free_pcp:801 free_cma:4096 Node 0 active_anon:236712kB inactive_anon:320kB active_file:0kB inactive_file:29732kB unevictable:3072kB isolated(anon):0kB isolated(file):0kB mapped:35040kB dirty:52kB writeback:0kB shmem:3636kB writeback_tmp:0kB kernel_stack:5304kB pagetables:1364kB sec_pagetables:0kB all_unreclaimable? no Node 0 DMA32 free:799740kB boost:0kB min:4656kB low:6012kB high:7368kB reserved_highatomic:0KB active_anon:236712kB inactive_anon:320kB active_file:0kB inactive_file:29732kB unevictable:3072kB writepending:52kB present:2095104kB managed:1359004kB mlocked:0kB bounce:0kB free_pcp:3424kB local_pcp:1076kB free_cma:16384kB lowmem_reserve[]: 0 0 0 Node 0 DMA32: 1871*4kB (UME) 1034*8kB (UME) 429*16kB (UME) 141*32kB (UME) 128*64kB (UME) 62*128kB (UME) 27*256kB (UME) 14*512kB (UME) 7*1024kB (UME) 7*2048kB (MC) 176*4096kB (MC) = 799740kB 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 8345 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