loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: use-after-free in diWrite+0xb48/0x15cc fs/jfs/jfs_imap.c:753 Write of size 32 at addr ffff0000dac6e0c0 by task syz-executor365/4290 CPU: 0 PID: 4290 Comm: syz-executor365 Not tainted 6.1.128-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x174/0x4c0 mm/kasan/report.c:427 kasan_report+0xd4/0x130 mm/kasan/report.c:531 kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189 memcpy+0x60/0x90 mm/kasan/shadow.c:66 diWrite+0xb48/0x15cc fs/jfs/jfs_imap.c:753 txCommit+0x750/0x5574 fs/jfs/jfs_txnmgr.c:1255 add_missing_indices+0x760/0xa8c fs/jfs/jfs_dtree.c:2663 jfs_readdir+0x18ac/0x3030 fs/jfs/jfs_dtree.c:3019 iterate_dir+0x1f4/0x4ec __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __arm64_sys_getdents64+0x1c4/0x4a0 fs/readdir.c:354 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 4156: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x74/0x458 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x230/0x37c mm/slub.c:3422 mt_alloc_one lib/maple_tree.c:152 [inline] mas_alloc_nodes+0x228/0x704 lib/maple_tree.c:1277 mas_node_count_gfp lib/maple_tree.c:1359 [inline] mas_preallocate+0x124/0x2dc lib/maple_tree.c:5815 __vma_adjust+0x2e4/0x1774 mm/mmap.c:723 __split_vma+0x324/0x448 do_mas_align_munmap+0x374/0x1160 mm/mmap.c:2468 do_mas_munmap mm/mmap.c:2638 [inline] __mmap_region mm/mmap.c:2686 [inline] mmap_region+0x8f8/0x2208 mm/mmap.c:2904 do_mmap+0x9ac/0x110c mm/mmap.c:1424 vm_mmap_pgoff+0x1a4/0x2b4 mm/util.c:520 ksys_mmap_pgoff+0x3c8/0x5b0 mm/mmap.c:1470 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Freed by task 4161: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] kmem_cache_free+0x2f0/0x588 mm/slub.c:3683 mt_free_rcu+0x28/0x38 lib/maple_tree.c:169 rcu_do_batch kernel/rcu/tree.c:2297 [inline] rcu_core+0x880/0x1c48 kernel/rcu/tree.c:2557 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2574 handle_softirqs+0x318/0xd58 kernel/softirq.c:578 __do_softirq+0x14/0x20 kernel/softirq.c:612 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 call_rcu+0xfc/0xa40 kernel/rcu/tree.c:2845 ma_free_rcu lib/maple_tree.c:182 [inline] mas_free lib/maple_tree.c:1341 [inline] mas_mat_free lib/maple_tree.c:1021 [inline] mas_wmb_replace+0xac4/0xfb0 lib/maple_tree.c:2821 mas_split lib/maple_tree.c:3608 [inline] mas_commit_b_node lib/maple_tree.c:3659 [inline] mas_wr_bnode lib/maple_tree.c:4393 [inline] mas_wr_modify+0x2978/0x3e64 lib/maple_tree.c:4436 mas_wr_store_entry+0x744/0xaf8 lib/maple_tree.c:4473 mas_store_prealloc+0x280/0x3ac lib/maple_tree.c:5797 vma_mas_store+0x19c/0x490 mm/mmap.c:433 __vma_adjust+0x1108/0x1774 mm/mmap.c:823 __split_vma+0x324/0x448 split_vma+0xa0/0xf8 mm/mmap.c:2412 mprotect_fixup+0x400/0x624 mm/mprotect.c:623 do_mprotect_pkey mm/mprotect.c:792 [inline] __do_sys_mprotect mm/mprotect.c:819 [inline] __se_sys_mprotect mm/mprotect.c:816 [inline] __arm64_sys_mprotect+0x764/0xc24 mm/mprotect.c:816 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the object at ffff0000dac6e000 which belongs to the cache maple_node of size 256 The buggy address is located 192 bytes inside of 256-byte region [ffff0000dac6e000, ffff0000dac6e100) The buggy address belongs to the physical page: page:0000000021855c0c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11ac6e head:0000000021855c0c order:1 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c000d680 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000dac6df80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000dac6e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000dac6e080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000dac6e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000dac6e180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== ERROR: (device loop0): jfs_readdir: JFS:Dtree error: ino = 2, bn=0, index = 0 ERROR: (device loop0): remounting filesystem as read-only