================================================================== BUG: KASAN: slab-use-after-free in hfsplus_release_folio+0x554/0x5f0 fs/hfsplus/inode.c:92 Read of size 4 at addr ffff88807b05e038 by task syz-executor.2/24381 CPU: 1 PID: 24381 Comm: syz-executor.2 Not tainted 6.2.0-next-20230225-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 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:319 print_report mm/kasan/report.c:430 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:536 hfsplus_release_folio+0x554/0x5f0 fs/hfsplus/inode.c:92 filemap_release_folio+0x13f/0x1b0 mm/filemap.c:4121 block_invalidate_folio+0x4dc/0x5e0 fs/buffer.c:1569 folio_invalidate mm/truncate.c:159 [inline] truncate_cleanup_folio+0x31a/0x3f0 mm/truncate.c:179 truncate_inode_pages_range+0x238/0xec0 mm/truncate.c:368 hfsplus_evict_inode+0x1a/0xe0 fs/hfsplus/super.c:168 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput fs/inode.c:1774 [inline] iput+0x52b/0x8e0 fs/inode.c:1760 hfsplus_put_super+0x274/0x3f0 fs/hfsplus/super.c:302 generic_shutdown_super+0x158/0x480 fs/super.c:491 kill_block_super+0x9b/0xf0 fs/super.c:1398 deactivate_locked_super+0x98/0x160 fs/super.c:331 deactivate_super+0xb1/0xd0 fs/super.c:362 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f888a48d567 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 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:00007ffc05224b08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f888a48d567 RDX: 00007ffc05224bdb RSI: 000000000000000a RDI: 00007ffc05224bd0 RBP: 00007ffc05224bd0 R08: 00000000ffffffff R09: 00007ffc052249a0 R10: 000055555581b8b3 R11: 0000000000000246 R12: 00007f888a4e6b24 R13: 00007ffc05225c90 R14: 000055555581b810 R15: 00007ffc05225cd0 Allocated by task 26597: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] hfsplus_btree_open+0x51/0xe70 fs/hfsplus/btree.c:142 hfsplus_fill_super+0xa4e/0x1c40 fs/hfsplus/super.c:473 mount_bdev+0x351/0x410 fs/super.c:1371 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x350 fs/super.c:1501 do_new_mount fs/namespace.c:3042 [inline] path_mount+0x1342/0x1e40 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3571 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 Freed by task 24381: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800 hfsplus_btree_close+0x28a/0x390 fs/hfsplus/btree.c:280 hfsplus_put_super+0x224/0x3f0 fs/hfsplus/super.c:300 generic_shutdown_super+0x158/0x480 fs/super.c:491 kill_block_super+0x9b/0xf0 fs/super.c:1398 deactivate_locked_super+0x98/0x160 fs/super.c:331 deactivate_super+0xb1/0xd0 fs/super.c:362 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807b05e000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 56 bytes inside of freed 4096-byte region [ffff88807b05e000, ffff88807b05f000) The buggy address belongs to the physical page: page:ffffea0001ec1600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807b05c000 pfn:0x7b058 head:ffffea0001ec1600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012442140 ffffea0000b26c10 ffffea0001ecac10 raw: ffff88807b05c000 0000000000040001 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 21073, tgid 21072 (syz-executor.5), ts 1433469271715, free_ts 1432926374085 prep_new_page mm/page_alloc.c:2492 [inline] get_page_from_freelist+0xf75/0x2ad0 mm/page_alloc.c:4256 __alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5522 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x28e/0x380 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x330 mm/slub.c:3491 kmalloc_trace+0x26/0x60 mm/slab_common.c:1061 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] btrfs_alloc_root+0x48/0x90 fs/btrfs/disk-io.c:952 read_tree_root_path+0x130/0x710 fs/btrfs/disk-io.c:1269 load_global_roots_objectid+0x364/0x7e0 fs/btrfs/disk-io.c:2364 load_global_roots fs/btrfs/disk-io.c:2415 [inline] btrfs_read_roots fs/btrfs/disk-io.c:2432 [inline] init_tree_roots fs/btrfs/disk-io.c:2855 [inline] open_ctree+0x3d4b/0x5320 fs/btrfs/disk-io.c:3551 btrfs_fill_super fs/btrfs/super.c:1152 [inline] btrfs_mount_root+0xa49/0xdb0 fs/btrfs/super.c:1521 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x350 fs/super.c:1501 fc_mount fs/namespace.c:1035 [inline] vfs_kern_mount.part.0+0xd3/0x170 fs/namespace.c:1065 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_unref_page_prepare+0x4d1/0xb60 mm/page_alloc.c:3318 free_unref_page+0x33/0x370 mm/page_alloc.c:3413 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294 __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:769 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x175/0x320 mm/slub.c:3476 getname_flags.part.0+0x50/0x4f0 fs/namei.c:140 getname_flags include/linux/audit.h:321 [inline] getname+0x92/0xd0 fs/namei.c:219 do_sys_openat2+0xf5/0x4c0 fs/open.c:1306 do_sys_open fs/open.c:1328 [inline] __do_sys_openat fs/open.c:1344 [inline] __se_sys_openat fs/open.c:1339 [inline] __x64_sys_openat+0x143/0x1f0 fs/open.c:1339 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: ffff88807b05df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807b05df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807b05e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807b05e080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807b05e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================