================================================================== 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 instrument_copy_to_user include/linux/instrumented.h:118 [inline] lib/usercopy.c:26 BUG: KASAN: slab-out-of-bounds in _copy_to_user lib/usercopy.c:32 [inline] lib/usercopy.c:26 BUG: KASAN: slab-out-of-bounds in _copy_to_user+0xc7/0x150 lib/usercopy.c:26 lib/usercopy.c:26 Read of size 42 at addr ffff8880183b8980 by task syz-executor274/3615 CPU: 1 PID: 3615 Comm: syz-executor274 Not tainted 5.16.0-rc5-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 lib/dump_stack.c:88 [inline] lib/dump_stack.c:106 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan/report.c:247 mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [inline] __kasan_report mm/kasan/report.c:433 [inline] mm/kasan/report.c:450 kasan_report.cold+0x83/0xdf mm/kasan/report.c:450 mm/kasan/report.c:450 check_region_inline mm/kasan/generic.c:183 [inline] check_region_inline mm/kasan/generic.c:183 [inline] mm/kasan/generic.c:189 kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 mm/kasan/generic.c:189 instrument_copy_to_user include/linux/instrumented.h:118 [inline] _copy_to_user lib/usercopy.c:32 [inline] instrument_copy_to_user include/linux/instrumented.h:118 [inline] lib/usercopy.c:26 _copy_to_user lib/usercopy.c:32 [inline] lib/usercopy.c:26 _copy_to_user+0xc7/0x150 lib/usercopy.c:26 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:200 [inline] copy_to_user include/linux/uaccess.h:200 [inline] kernel/bpf/hashtab.c:1768 __htab_map_lookup_and_delete_batch+0xec3/0x1880 kernel/bpf/hashtab.c:1768 kernel/bpf/hashtab.c:1768 bpf_map_do_batch+0x2dd/0x5c0 kernel/bpf/syscall.c:4221 kernel/bpf/syscall.c:4221 __sys_bpf+0x288b/0x5950 kernel/bpf/syscall.c:4693 kernel/bpf/syscall.c:4693 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] kernel/bpf/syscall.c:4735 __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] kernel/bpf/syscall.c:4735 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4735 kernel/bpf/syscall.c:4735 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_x64 arch/x86/entry/common.c:50 [inline] arch/x86/entry/common.c:80 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fb117482b89 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb1174132f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb11750b3f0 RCX: 00007fb117482b89 RDX: 0000000000000038 RSI: 0000000020000080 RDI: 0000000000000019 RBP: 00007fb1174d88f0 R08: 00007fb117413700 R09: 0000000000000000 R10: 00007fb117413700 R11: 0000000000000246 R12: 00000000200031c0 R13: 00007fb1174d8078 R14: 00000000200021c0 R15: 00007fb11750b3f8 Allocated by task 3615: kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 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_set_track mm/kasan/common.c:46 [inline] mm/kasan/common.c:522 set_alloc_info mm/kasan/common.c:434 [inline] mm/kasan/common.c:522 ____kasan_kmalloc mm/kasan/common.c:513 [inline] mm/kasan/common.c:522 ____kasan_kmalloc mm/kasan/common.c:472 [inline] mm/kasan/common.c:522 __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:522 mm/kasan/common.c:522 kmalloc_node include/linux/slab.h:613 [inline] kmalloc_node include/linux/slab.h:613 [inline] mm/util.c:587 kvmalloc_node+0x61/0x120 mm/util.c:587 mm/util.c:587 kvmalloc include/linux/slab.h:741 [inline] kvmalloc_array include/linux/slab.h:759 [inline] kvmalloc include/linux/slab.h:741 [inline] kernel/bpf/hashtab.c:1647 kvmalloc_array include/linux/slab.h:759 [inline] kernel/bpf/hashtab.c:1647 __htab_map_lookup_and_delete_batch+0x525/0x1880 kernel/bpf/hashtab.c:1647 kernel/bpf/hashtab.c:1647 bpf_map_do_batch+0x2dd/0x5c0 kernel/bpf/syscall.c:4221 kernel/bpf/syscall.c:4221 __sys_bpf+0x288b/0x5950 kernel/bpf/syscall.c:4693 kernel/bpf/syscall.c:4693 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] kernel/bpf/syscall.c:4735 __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] kernel/bpf/syscall.c:4735 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4735 kernel/bpf/syscall.c:4735 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_x64 arch/x86/entry/common.c:50 [inline] arch/x86/entry/common.c:80 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff8880183b8980 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes inside of 64-byte region [ffff8880183b8980, ffff8880183b89c0) The buggy address belongs to the page: page:ffffea000060ee00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183b8 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0000714c80 dead000000000005 ffff888010c41640 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 0x12c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY), pid 2970, ts 13072649837, free_ts 11258641957 prep_new_page mm/page_alloc.c:2418 [inline] prep_new_page mm/page_alloc.c:2418 [inline] mm/page_alloc.c:4149 get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4149 mm/page_alloc.c:4149 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369 mm/page_alloc.c:5369 alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191 mm/mempolicy.c:2191 alloc_slab_page mm/slub.c:1793 [inline] allocate_slab mm/slub.c:1930 [inline] alloc_slab_page mm/slub.c:1793 [inline] mm/slub.c:1993 allocate_slab mm/slub.c:1930 [inline] mm/slub.c:1993 new_slab+0x32d/0x4a0 mm/slub.c:1993 mm/slub.c:1993 ___slab_alloc+0x918/0xfe0 mm/slub.c:3022 mm/slub.c:3022 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3109 mm/slub.c:3109 slab_alloc_node mm/slub.c:3200 [inline] slab_alloc mm/slub.c:3242 [inline] slab_alloc_node mm/slub.c:3200 [inline] mm/slub.c:4419 slab_alloc mm/slub.c:3242 [inline] mm/slub.c:4419 __kmalloc+0x2fb/0x340 mm/slub.c:4419 mm/slub.c:4419 kmalloc include/linux/slab.h:595 [inline] kzalloc include/linux/slab.h:724 [inline] kmalloc include/linux/slab.h:595 [inline] security/tomoyo/realpath.c:45 kzalloc include/linux/slab.h:724 [inline] security/tomoyo/realpath.c:45 tomoyo_encode2.part.0+0xe9/0x3a0 security/tomoyo/realpath.c:45 security/tomoyo/realpath.c:45 tomoyo_encode2 security/tomoyo/realpath.c:31 [inline] tomoyo_encode2 security/tomoyo/realpath.c:31 [inline] security/tomoyo/realpath.c:80 tomoyo_encode+0x28/0x50 security/tomoyo/realpath.c:80 security/tomoyo/realpath.c:80 tomoyo_realpath_from_path+0x186/0x620 security/tomoyo/realpath.c:288 security/tomoyo/realpath.c:288 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_get_realpath security/tomoyo/file.c:151 [inline] security/tomoyo/file.c:771 tomoyo_check_open_permission+0x272/0x380 security/tomoyo/file.c:771 security/tomoyo/file.c:771 tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline] tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline] security/tomoyo/tomoyo.c:306 tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:306 security/tomoyo/tomoyo.c:306 security_file_open+0x45/0xb0 security/security.c:1635 security/security.c:1635 do_dentry_open+0x353/0x1250 fs/open.c:809 fs/open.c:809 do_open fs/namei.c:3426 [inline] do_open fs/namei.c:3426 [inline] fs/namei.c:3559 path_openat+0x1cad/0x2750 fs/namei.c:3559 fs/namei.c:3559 do_filp_open+0x1aa/0x400 fs/namei.c:3586 fs/namei.c:3586 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] reset_page_owner include/linux/page_owner.h:24 [inline] mm/page_alloc.c:1389 free_pages_prepare mm/page_alloc.c:1338 [inline] mm/page_alloc.c:1389 free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1389 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3309 [inline] free_unref_page_prepare mm/page_alloc.c:3309 [inline] mm/page_alloc.c:3388 free_unref_page+0x19/0x690 mm/page_alloc.c:3388 mm/page_alloc.c:3388 kasan_depopulate_vmalloc_pte+0x5c/0x70 mm/kasan/shadow.c:380 mm/kasan/shadow.c:380 apply_to_pte_range mm/memory.c:2518 [inline] apply_to_pmd_range mm/memory.c:2562 [inline] apply_to_pud_range mm/memory.c:2598 [inline] apply_to_p4d_range mm/memory.c:2634 [inline] apply_to_pte_range mm/memory.c:2518 [inline] mm/memory.c:2668 apply_to_pmd_range mm/memory.c:2562 [inline] mm/memory.c:2668 apply_to_pud_range mm/memory.c:2598 [inline] mm/memory.c:2668 apply_to_p4d_range mm/memory.c:2634 [inline] mm/memory.c:2668 __apply_to_page_range+0x694/0x1080 mm/memory.c:2668 mm/memory.c:2668 kasan_release_vmalloc+0xa7/0xc0 mm/kasan/shadow.c:490 mm/kasan/shadow.c:490 __purge_vmap_area_lazy+0x8f9/0x1c50 mm/vmalloc.c:1708 mm/vmalloc.c:1708 _vm_unmap_aliases.part.0+0x3f0/0x500 mm/vmalloc.c:2111 mm/vmalloc.c:2111 _vm_unmap_aliases mm/vmalloc.c:2085 [inline] _vm_unmap_aliases mm/vmalloc.c:2085 [inline] mm/vmalloc.c:2134 vm_unmap_aliases+0x45/0x50 mm/vmalloc.c:2134 mm/vmalloc.c:2134 change_page_attr_set_clr+0x241/0x500 arch/x86/mm/pat/set_memory.c:1743 arch/x86/mm/pat/set_memory.c:1743 change_page_attr_set arch/x86/mm/pat/set_memory.c:1793 [inline] change_page_attr_set arch/x86/mm/pat/set_memory.c:1793 [inline] arch/x86/mm/pat/set_memory.c:1941 set_memory_nx+0xb2/0x110 arch/x86/mm/pat/set_memory.c:1941 arch/x86/mm/pat/set_memory.c:1941 free_init_pages+0x73/0xc0 arch/x86/mm/init.c:894 arch/x86/mm/init.c:894 kernel_init+0x2e/0x1d0 init/main.c:1508 init/main.c:1508 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 arch/x86/entry/entry_64.S:295 Memory state around the buggy address: ffff8880183b8880: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff8880183b8900: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8880183b8980: 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880183b8a00: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc ffff8880183b8a80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 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