loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: use-after-free in dtMoveEntry fs/jfs/jfs_dtree.c:3922 [inline] BUG: KASAN: use-after-free in dtSplitPage+0x1a21/0x3160 fs/jfs/jfs_dtree.c:1561 Write of size 1 at addr ffff88802c4a4000 by task syz.0.70/4628 CPU: 1 PID: 4628 Comm: syz.0.70 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0xa8/0x210 mm/kasan/report.c:420 kasan_report+0x10b/0x140 mm/kasan/report.c:524 dtMoveEntry fs/jfs/jfs_dtree.c:3922 [inline] dtSplitPage+0x1a21/0x3160 fs/jfs/jfs_dtree.c:1561 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline] dtInsert+0x106f/0x57e0 fs/jfs/jfs_dtree.c:871 jfs_symlink+0x8bb/0xfd0 fs/jfs/namei.c:1019 vfs_symlink+0x245/0x3d0 fs/namei.c:4522 do_symlinkat+0x1b6/0x400 fs/namei.c:4551 __do_sys_symlinkat fs/namei.c:4568 [inline] __se_sys_symlinkat fs/namei.c:4565 [inline] __x64_sys_symlinkat+0x95/0xa0 fs/namei.c:4565 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f9ddf19e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9ddffbc028 EFLAGS: 00000246 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 00007f9ddf425fa0 RCX: 00007f9ddf19e159 RDX: 00002000000005c0 RSI: ffffffffffffff9c RDI: 0000200000000700 RBP: 00007f9ddf23506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9ddf426038 R14: 00007f9ddf425fa0 R15: 00007ffe90d4a928 Allocated by task 4397: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:53 __kasan_slab_alloc+0x6b/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x4b/0x490 mm/slab.h:737 kmem_cache_alloc_bulk+0x3ba/0x4e0 mm/slub.c:3880 mt_alloc_bulk lib/maple_tree.c:159 [inline] mas_alloc_nodes+0x449/0x880 lib/maple_tree.c:1301 mas_node_count_gfp lib/maple_tree.c:1361 [inline] mas_preallocate+0x162/0x3b0 lib/maple_tree.c:5809 __vma_adjust+0x2ff/0x1d00 mm/mmap.c:724 vma_adjust include/linux/mm.h:2810 [inline] __split_vma+0x3a2/0x4f0 mm/mmap.c:-1 do_mas_align_munmap+0x399/0x12d0 mm/mmap.c:2480 do_mas_munmap+0x240/0x2b0 mm/mmap.c:2650 __vm_munmap+0x1aa/0x2d0 mm/mmap.c:2936 __do_sys_munmap mm/mmap.c:2961 [inline] __se_sys_munmap mm/mmap.c:2958 [inline] __x64_sys_munmap+0x5c/0x70 mm/mmap.c:2958 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 4397: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:53 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1729 [inline] slab_free_freelist_hook+0x133/0x1b0 mm/slub.c:1755 slab_free mm/slub.c:3687 [inline] kmem_cache_free_bulk+0x364/0x480 mm/slub.c:3805 mt_free_bulk lib/maple_tree.c:164 [inline] mas_destroy+0x251f/0x2d40 lib/maple_tree.c:5864 mas_store_prealloc+0x32c/0x430 lib/maple_tree.c:5792 __vma_adjust+0x121d/0x1d00 mm/mmap.c:832 vma_adjust include/linux/mm.h:2810 [inline] __split_vma+0x3a2/0x4f0 mm/mmap.c:-1 do_mas_align_munmap+0x399/0x12d0 mm/mmap.c:2480 do_mas_munmap+0x240/0x2b0 mm/mmap.c:2650 __vm_munmap+0x1aa/0x2d0 mm/mmap.c:2936 __do_sys_munmap mm/mmap.c:2961 [inline] __se_sys_munmap mm/mmap.c:2958 [inline] __x64_sys_munmap+0x5c/0x70 mm/mmap.c:2958 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88802c4a4000 which belongs to the cache maple_node of size 256 The buggy address is located 0 bytes inside of 256-byte region [ffff88802c4a4000, ffff88802c4a4100) The buggy address belongs to the physical page: page:ffffea0000b12900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2c4a4 head:ffffea0000b12900 order:1 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0000b91600 dead000000000004 ffff8880174c5000 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3926, tgid 3926 (sh), ts 37090044071, free_ts 35803207955 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2560 prep_new_page mm/page_alloc.c:2567 [inline] get_page_from_freelist+0x206b/0x2180 mm/page_alloc.c:4358 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5658 alloc_slab_page+0x5d/0x180 mm/slub.c:1799 allocate_slab mm/slub.c:1944 [inline] new_slab+0x87/0x2d0 mm/slub.c:1997 ___slab_alloc+0xbc5/0x1240 mm/slub.c:3154 kmem_cache_alloc_bulk+0x1a3/0x4e0 mm/slub.c:3856 mt_alloc_bulk lib/maple_tree.c:159 [inline] mas_alloc_nodes+0x449/0x880 lib/maple_tree.c:1301 mas_node_count_gfp lib/maple_tree.c:1361 [inline] mas_preallocate+0x162/0x3b0 lib/maple_tree.c:5809 __vma_adjust+0x2ff/0x1d00 mm/mmap.c:724 vma_adjust include/linux/mm.h:2810 [inline] __split_vma+0x3a2/0x4f0 mm/mmap.c:-1 do_mas_align_munmap+0x7b8/0x12d0 mm/mmap.c:2501 do_mas_munmap+0x240/0x2b0 mm/mmap.c:2650 __mmap_region mm/mmap.c:2698 [inline] mmap_region+0x7ab/0x1c50 mm/mmap.c:2916 do_mmap+0x9ce/0x10d0 mm/mmap.c:1436 vm_mmap_pgoff+0x1c1/0x2d0 mm/util.c:520 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1487 [inline] free_pcp_prepare mm/page_alloc.c:1537 [inline] free_unref_page_prepare+0x8e5/0x9e0 mm/page_alloc.c:3414 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3509 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x144/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1e/0x80 mm/kasan/common.c:306 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x4b/0x490 mm/slab.h:737 slab_alloc_node mm/slub.c:3359 [inline] __kmem_cache_alloc_node+0x19d/0x270 mm/slub.c:3398 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc+0xa3/0x240 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] tomoyo_realpath_from_path+0xe2/0x5c0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path2_perm+0x2cc/0x880 security/tomoyo/file.c:923 tomoyo_path_rename+0x14b/0x1a0 security/tomoyo/tomoyo.c:287 security_path_rename+0x168/0x200 security/security.c:1221 do_renameat2+0x691/0xc80 fs/namei.c:5065 __do_sys_rename fs/namei.c:5124 [inline] __se_sys_rename fs/namei.c:5122 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5122 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff88802c4a3f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88802c4a3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88802c4a4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802c4a4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802c4a4100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================