loop0: detected capacity change from 0 to 1024 ================================================================== BUG: KASAN: use-after-free in hfsplus_release_folio+0x410/0x4ac fs/hfsplus/inode.c:92 Read of size 4 at addr ffff0000d833e038 by task syz-executor954/4307 CPU: 0 PID: 4307 Comm: syz-executor954 Not tainted 6.1.15-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 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:284 [inline] print_report+0x178/0x4e0 mm/kasan/report.c:395 kasan_report+0xd4/0x130 mm/kasan/report.c:495 __asan_report_load4_noabort+0x2c/0x38 mm/kasan/report_generic.c:350 hfsplus_release_folio+0x410/0x4ac fs/hfsplus/inode.c:92 filemap_release_folio+0x144/0x30c mm/filemap.c:3949 block_invalidate_folio+0x4c4/0x814 fs/buffer.c:1526 folio_invalidate mm/truncate.c:159 [inline] truncate_cleanup_folio+0x180/0x4c0 mm/truncate.c:179 truncate_inode_pages_range+0x288/0x13b0 mm/truncate.c:369 truncate_inode_pages mm/truncate.c:452 [inline] truncate_inode_pages_final+0x90/0xc0 mm/truncate.c:487 hfsplus_evict_inode+0x2c/0xc0 fs/hfsplus/super.c:168 evict+0x260/0x68c fs/inode.c:664 iput_final fs/inode.c:1747 [inline] iput+0x968/0xa4c fs/inode.c:1773 hfsplus_put_super+0x1b0/0x2ec fs/hfsplus/super.c:302 generic_shutdown_super+0x130/0x2f0 fs/super.c:492 kill_block_super+0x70/0xdc fs/super.c:1428 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xf0/0x110 fs/super.c:363 cleanup_mnt+0x394/0x41c fs/namespace.c:1186 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193 task_work_run+0x240/0x2f0 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x538/0x1af8 kernel/exit.c:867 do_group_exit+0x194/0x22c kernel/exit.c:1012 __do_sys_exit_group kernel/exit.c:1023 [inline] __se_sys_exit_group kernel/exit.c:1021 [inline] __wake_up_parent+0x0/0x60 kernel/exit.c:1021 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 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:581 Allocated by task 4307: 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_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] kmalloc_trace+0x7c/0x94 mm/slab_common.c:1050 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] hfsplus_btree_open+0x6c/0xd00 fs/hfsplus/btree.c:142 hfsplus_fill_super+0x910/0x166c fs/hfsplus/super.c:485 mount_bdev+0x26c/0x368 fs/super.c:1401 hfsplus_mount+0x44/0x58 fs/hfsplus/super.c:641 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1531 do_new_mount+0x25c/0x8c8 fs/namespace.c:3040 path_mount+0x590/0xe58 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3568 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 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:581 Freed by task 4307: 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+0x144/0x20c 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+0x2c0/0x500 mm/slub.c:3674 kfree+0x104/0x268 mm/slab_common.c:1007 hfsplus_btree_close+0x25c/0x288 fs/hfsplus/btree.c:280 hfsplus_put_super+0x140/0x2ec fs/hfsplus/super.c:298 generic_shutdown_super+0x130/0x2f0 fs/super.c:492 kill_block_super+0x70/0xdc fs/super.c:1428 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xf0/0x110 fs/super.c:363 cleanup_mnt+0x394/0x41c fs/namespace.c:1186 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193 task_work_run+0x240/0x2f0 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x538/0x1af8 kernel/exit.c:867 do_group_exit+0x194/0x22c kernel/exit.c:1012 __do_sys_exit_group kernel/exit.c:1023 [inline] __se_sys_exit_group kernel/exit.c:1021 [inline] __wake_up_parent+0x0/0x60 kernel/exit.c:1021 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 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:581 The buggy address belongs to the object at ffff0000d833e000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 56 bytes inside of 4096-byte region [ffff0000d833e000, ffff0000d833f000) The buggy address belongs to the physical page: page:00000000386b5da6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x118338 head:00000000386b5da6 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c0002a80 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d833df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d833df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000d833e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000d833e080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d833e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================