================================================================== BUG: KASAN: slab-out-of-bounds in instrument_copy_to_user include/linux/instrumented.h:118 [inline] BUG: KASAN: slab-out-of-bounds in _copy_to_user lib/usercopy.c:32 [inline] BUG: KASAN: slab-out-of-bounds in _copy_to_user+0xc7/0x150 lib/usercopy.c:26 Read of size 42 at addr ffff88807d1ee080 by task syz-executor.5/10300 CPU: 0 PID: 10300 Comm: syz-executor.5 Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:256 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 instrument_copy_to_user include/linux/instrumented.h:118 [inline] _copy_to_user lib/usercopy.c:32 [inline] _copy_to_user+0xc7/0x150 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:200 [inline] __htab_map_lookup_and_delete_batch+0xf19/0x1900 kernel/bpf/hashtab.c:1768 bpf_map_do_batch+0x3d5/0x510 kernel/bpf/syscall.c:4180 __sys_bpf+0x2706/0x5df0 kernel/bpf/syscall.c:4651 __do_sys_bpf kernel/bpf/syscall.c:4695 [inline] __se_sys_bpf kernel/bpf/syscall.c:4693 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4693 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f3f242f6a39 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3f2182a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f3f243fa0e0 RCX: 00007f3f242f6a39 RDX: 0000000000000038 RSI: 0000000020000080 RDI: 0000000000000019 RBP: 00007f3f24350e8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff40f4cecf R14: 00007f3f2182a300 R15: 0000000000022000 Allocated by task 10300: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] ____kasan_kmalloc mm/kasan/common.c:472 [inline] __kasan_kmalloc+0xa4/0xd0 mm/kasan/common.c:522 kmalloc_node include/linux/slab.h:614 [inline] kvmalloc_node+0x61/0x120 mm/util.c:587 kvmalloc include/linux/mm.h:805 [inline] kvmalloc_array include/linux/mm.h:823 [inline] __htab_map_lookup_and_delete_batch+0x525/0x1900 kernel/bpf/hashtab.c:1647 bpf_map_do_batch+0x3d5/0x510 kernel/bpf/syscall.c:4180 __sys_bpf+0x2706/0x5df0 kernel/bpf/syscall.c:4651 __do_sys_bpf kernel/bpf/syscall.c:4695 [inline] __se_sys_bpf kernel/bpf/syscall.c:4693 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4693 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff88807d1ee080 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes inside of 64-byte region [ffff88807d1ee080, ffff88807d1ee0c0) The buggy address belongs to the page: page:ffffea0001f47b80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d1ee flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea00007ecfc0 0000000c00000002 ffff888010c41640 raw: 0000000000000000 0000000000200020 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 2, ts 167559781674, free_ts 167023480357 prep_new_page mm/page_alloc.c:2424 [inline] get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4153 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5375 alloc_pages+0x1a7/0x300 mm/mempolicy.c:2197 alloc_slab_page mm/slub.c:1763 [inline] allocate_slab mm/slub.c:1900 [inline] new_slab+0x319/0x490 mm/slub.c:1963 ___slab_alloc+0x921/0xfe0 mm/slub.c:2994 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3081 slab_alloc_node mm/slub.c:3172 [inline] __kmalloc_node+0x2d2/0x370 mm/slub.c:4435 kmalloc_node include/linux/slab.h:614 [inline] __vmalloc_area_node mm/vmalloc.c:2903 [inline] __vmalloc_node_range+0x5ec/0x9e0 mm/vmalloc.c:3020 alloc_thread_stack_node kernel/fork.c:245 [inline] dup_task_struct kernel/fork.c:887 [inline] copy_process+0x926/0x7590 kernel/fork.c:2026 kernel_clone+0xe7/0xac0 kernel/fork.c:2584 kernel_thread+0xb5/0xf0 kernel/fork.c:2636 create_kthread kernel/kthread.c:342 [inline] kthreadd+0x4ea/0x750 kernel/kthread.c:685 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3315 [inline] free_unref_page_list+0x1a9/0xfa0 mm/page_alloc.c:3431 release_pages+0x830/0x20b0 mm/swap.c:963 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:242 [inline] tlb_flush_mmu mm/mmu_gather.c:249 [inline] tlb_finish_mmu+0x165/0x8c0 mm/mmu_gather.c:340 exit_mmap+0x1ea/0x630 mm/mmap.c:3173 __mmput+0x122/0x4b0 kernel/fork.c:1115 mmput+0x58/0x60 kernel/fork.c:1136 exit_mm kernel/exit.c:501 [inline] do_exit+0xabc/0x2a30 kernel/exit.c:812 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x47f/0x2160 kernel/signal.c:2868 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae Memory state around the buggy address: ffff88807d1edf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88807d1ee000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88807d1ee080: 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807d1ee100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88807d1ee180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================