================================================================== BUG: KASAN: slab-out-of-bounds in copy_array+0x8a/0xe8 kernel/bpf/verifier.c:1072 Write of size 88 at addr ff6000000fa62e00 by task syz-executor.0/12301 CPU: 0 PID: 12301 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 12301: 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 Last potentially related work creation: stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122 kasan_save_stack+0x2c/0x5a mm/kasan/common.c:45 __kasan_record_aux_stack+0xc0/0xe4 mm/kasan/generic.c:488 kasan_record_aux_stack_noalloc+0xe/0x16 mm/kasan/generic.c:498 kvfree_call_rcu+0x8e/0x40a kernel/rcu/tree.c:3376 __hw_addr_flush+0xee/0x138 net/core/dev_addr_lists.c:490 dev_addr_flush+0x22/0x3c net/core/dev_addr_lists.c:535 free_netdev+0x150/0x3ba net/core/dev.c:10708 netdev_run_todo+0x8c0/0xad2 net/core/dev.c:10354 rtnl_unlock+0x14/0x1c net/core/rtnetlink.c:148 ip6gre_exit_batch_net+0x460/0x64a net/ipv6/ip6_gre.c:1640 ops_exit_list+0xcc/0xe8 net/core/net_namespace.c:174 cleanup_net+0x430/0x732 net/core/net_namespace.c:606 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 The buggy address belongs to the object at ff6000000fa62e00 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 0 bytes inside of 128-byte region [ff6000000fa62e00, ff6000000fa62e80) The buggy address belongs to the physical page: page:ff1c0000023f1880 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8fc62 flags: 0xffe000000000200(slab|node=0|zone=0|lastcpupid=0x7ff) raw: 0ffe000000000200 ff600000082018c0 ff1c0000022fad40 0000000000000002 raw: 0000000000000000 0000000080100010 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 10033, tgid 10033 (syz-executor.0), ts 6392064015600, free_ts 5883889460900 __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] vkms_plane_duplicate_state+0x78/0xe4 drivers/gpu/drm/vkms/vkms_plane.c:38 drm_atomic_get_plane_state+0x13e/0x2fe drivers/gpu/drm/drm_atomic.c:539 drm_client_modeset_commit_atomic+0x1ba/0x56c drivers/gpu/drm/drm_client_modeset.c:1001 drm_client_modeset_commit_locked+0xc8/0x31a drivers/gpu/drm/drm_client_modeset.c:1152 drm_client_modeset_commit+0x4c/0x70 drivers/gpu/drm/drm_client_modeset.c:1178 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:248 [inline] __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:227 [inline] drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:275 [inline] drm_fb_helper_lastclose+0xb8/0x126 drivers/gpu/drm/drm_fb_helper.c:2249 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 kasan_depopulate_vmalloc_pte+0x46/0x64 mm/kasan/shadow.c:372 apply_to_pte_range mm/memory.c:2600 [inline] apply_to_pmd_range mm/memory.c:2644 [inline] apply_to_pud_range mm/memory.c:2680 [inline] apply_to_p4d_range mm/memory.c:2716 [inline] __apply_to_page_range+0x90c/0x12b4 mm/memory.c:2750 apply_to_existing_page_range+0x34/0x46 mm/memory.c:2783 kasan_release_vmalloc+0x80/0x96 mm/kasan/shadow.c:486 __purge_vmap_area_lazy+0x636/0x1330 mm/vmalloc.c:1776 drain_vmap_area_work+0x3c/0x7e mm/vmalloc.c:1809 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 Memory state around the buggy address: ff6000000fa62d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ff6000000fa62d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ff6000000fa62e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ff6000000fa62e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ff6000000fa62f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================