RBP: 00007f02a4bff000 R08: 0000000000000000 R09: 0000000000000171 R10: 0000000000002000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f02af2adfdc R14: 00007f02af2adfe0 R15: 0000000020000242 ================================================================== BUG: KASAN: slab-out-of-bounds in mt_slot lib/maple_tree.c:816 [inline] BUG: KASAN: slab-out-of-bounds in mas_slot lib/maple_tree.c:849 [inline] BUG: KASAN: slab-out-of-bounds in mt_validate_nulls+0xc04/0xd10 lib/maple_tree.c:7172 Read of size 8 at addr ffff88805450e300 by task syz-executor.1/5703 CPU: 0 PID: 5703 Comm: syz-executor.1 Not tainted 6.4.0-syzkaller-10173-ga901a3568fd2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:364 print_report mm/kasan/report.c:475 [inline] kasan_report+0x11d/0x130 mm/kasan/report.c:588 mt_slot lib/maple_tree.c:816 [inline] mas_slot lib/maple_tree.c:849 [inline] mt_validate_nulls+0xc04/0xd10 lib/maple_tree.c:7172 mt_validate+0x17e3/0x4370 lib/maple_tree.c:7227 validate_mm+0x9d/0x470 mm/mmap.c:300 do_vmi_align_munmap+0x1199/0x1680 mm/mmap.c:2561 do_vmi_munmap+0x266/0x430 mm/mmap.c:2619 __vm_munmap+0x137/0x380 mm/mmap.c:2899 __do_sys_munmap mm/mmap.c:2916 [inline] __se_sys_munmap mm/mmap.c:2913 [inline] __x64_sys_munmap+0x62/0x80 mm/mmap.c:2913 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f02ae48c467 Code: 00 00 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb 85 66 2e 0f 1f 84 00 00 00 00 00 90 b8 0b 00 00 00 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:00007f02af2adf38 EFLAGS: 00000246 ORIG_RAX: 000000000000000b RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f02ae48c467 RDX: 0000000000002000 RSI: 0000000000002000 RDI: 00007f02a4bff000 RBP: 00007f02a4bff000 R08: 0000000000000000 R09: 0000000000000171 R10: 0000000000002000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f02af2adfdc R14: 00007f02af2adfe0 R15: 0000000020000242 Allocated by task 5703: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc_node mm/slub.c:3470 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x16c/0x380 mm/slub.c:3494 mt_alloc_one lib/maple_tree.c:159 [inline] mas_alloc_nodes+0x4ec/0x8b0 lib/maple_tree.c:1282 mas_node_count_gfp+0x106/0x140 lib/maple_tree.c:1362 mas_node_count lib/maple_tree.c:1376 [inline] mas_wr_node_store+0xa64/0x1170 lib/maple_tree.c:4100 mas_wr_modify+0x28b/0x10d0 lib/maple_tree.c:4346 mas_wr_store_entry.isra.0+0x495/0x1030 lib/maple_tree.c:4390 mas_store_gfp+0xce/0x1f0 lib/maple_tree.c:5506 vma_iter_clear_gfp mm/mmap.c:162 [inline] do_vmi_align_munmap+0xd02/0x1680 mm/mmap.c:2538 do_vmi_munmap+0x266/0x430 mm/mmap.c:2619 __vm_munmap+0x137/0x380 mm/mmap.c:2899 __do_sys_munmap mm/mmap.c:2916 [inline] __se_sys_munmap mm/mmap.c:2913 [inline] __x64_sys_munmap+0x62/0x80 mm/mmap.c:2913 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb9/0xd0 mm/kasan/generic.c:491 __call_rcu_common.constprop.0+0x99/0x7e0 kernel/rcu/tree.c:2649 ma_free_rcu lib/maple_tree.c:189 [inline] mas_free lib/maple_tree.c:1344 [inline] mas_mat_free+0xa0/0x560 lib/maple_tree.c:1021 mas_wmb_replace lib/maple_tree.c:2801 [inline] mas_split.isra.0+0x1203/0x1810 lib/maple_tree.c:3587 mas_commit_b_node.isra.0+0x684/0xcf0 lib/maple_tree.c:3638 mas_wr_bnode+0x155/0x1e0 lib/maple_tree.c:4315 mas_wr_modify+0x2ee/0x10d0 lib/maple_tree.c:4353 mas_wr_store_entry.isra.0+0x495/0x1030 lib/maple_tree.c:4390 mas_store_prealloc+0xb3/0x270 lib/maple_tree.c:5529 vma_complete+0x8fd/0xdc0 mm/mmap.c:553 __split_vma+0x6e6/0x830 mm/mmap.c:2381 split_vma+0xc6/0x110 mm/mmap.c:2409 mprotect_fixup+0x90e/0xbd0 mm/mprotect.c:649 do_mprotect_pkey+0x883/0xd40 mm/mprotect.c:817 __do_sys_mprotect mm/mprotect.c:838 [inline] __se_sys_mprotect mm/mprotect.c:835 [inline] __x64_sys_mprotect+0x78/0xb0 mm/mprotect.c:835 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88805450e200 which belongs to the cache maple_node of size 256 The buggy address is located 0 bytes to the right of allocated 256-byte region [ffff88805450e200, ffff88805450e300) The buggy address belongs to the physical page: page:ffffea0001514380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5450e head:ffffea0001514380 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff88801324d000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0x152800(GFP_NOWAIT|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 5703, tgid 5702 (syz-executor.1), ts 2352778746379, free_ts 2328438997434 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0xfed/0x2d30 mm/page_alloc.c:3221 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4477 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279 alloc_slab_page mm/slub.c:1862 [inline] allocate_slab+0x25f/0x390 mm/slub.c:2009 new_slab mm/slub.c:2062 [inline] ___slab_alloc+0xbc3/0x15d0 mm/slub.c:3215 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3314 __slab_alloc_node mm/slub.c:3367 [inline] slab_alloc_node mm/slub.c:3460 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x365/0x380 mm/slub.c:3494 mt_alloc_one lib/maple_tree.c:159 [inline] mas_alloc_nodes+0x4ec/0x8b0 lib/maple_tree.c:1282 mas_node_count_gfp+0x106/0x140 lib/maple_tree.c:1362 mas_node_count lib/maple_tree.c:1376 [inline] mas_root_expand.isra.0+0x8d/0x6a0 lib/maple_tree.c:3671 mas_store_root lib/maple_tree.c:3709 [inline] mas_store_root lib/maple_tree.c:3704 [inline] mas_wr_store_entry.isra.0+0x6ea/0x1030 lib/maple_tree.c:4369 mas_store_gfp+0xce/0x1f0 lib/maple_tree.c:5506 do_vmi_align_munmap+0x5f4/0x1680 mm/mmap.c:2483 do_vmi_munmap+0x266/0x430 mm/mmap.c:2619 __vm_munmap+0x137/0x380 mm/mmap.c:2899 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1161 [inline] free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2348 free_unref_page+0x33/0x370 mm/page_alloc.c:2443 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc_node mm/slub.c:3470 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x16c/0x380 mm/slub.c:3494 getname_flags.part.0+0x50/0x4f0 fs/namei.c:140 getname_flags+0x9e/0xe0 include/linux/audit.h:319 vfs_fstatat+0x77/0xb0 fs/stat.c:275 __do_sys_newfstatat+0x8a/0x110 fs/stat.c:446 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88805450e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805450e280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805450e300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805450e380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805450e400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================