================================================================== BUG: KASAN: use-after-free in hfsplus_release_folio+0x493/0x550 fs/hfsplus/inode.c:92 Read of size 4 at addr ffff88804482c038 by task syz-executor.5/5090 CPU: 0 PID: 5090 Comm: syz-executor.5 Not tainted 6.2.0-rc7-syzkaller-00216-gf339c2597ebb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x163/0x4f0 mm/kasan/report.c:417 kasan_report+0x13a/0x170 mm/kasan/report.c:517 hfsplus_release_folio+0x493/0x550 fs/hfsplus/inode.c:92 block_invalidate_folio+0x681/0xa10 fs/buffer.c:1526 folio_invalidate mm/truncate.c:159 [inline] truncate_cleanup_folio+0x1e3/0x5f0 mm/truncate.c:179 truncate_inode_pages_range+0x2bc/0x11d0 mm/truncate.c:368 hfsplus_evict_inode+0x27/0xd0 fs/hfsplus/super.c:168 evict+0x2a4/0x620 fs/inode.c:664 hfsplus_put_super+0x20f/0x330 fs/hfsplus/super.c:302 generic_shutdown_super+0x134/0x310 fs/super.c:492 kill_block_super+0x7e/0xe0 fs/super.c:1386 deactivate_locked_super+0xa4/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1291 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x2e0 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3475a8d567 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:00007ffcfb305d68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f3475a8d567 RDX: 00007ffcfb305e3b RSI: 000000000000000a RDI: 00007ffcfb305e30 RBP: 00007ffcfb305e30 R08: 00000000ffffffff R09: 00007ffcfb305c00 R10: 0000555557397873 R11: 0000000000000246 R12: 00007f3475ae6b24 R13: 00007ffcfb306ef0 R14: 0000555557397810 R15: 00007ffcfb306f30 Allocated by task 18671: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x80 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_kmalloc+0x9b/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] hfsplus_btree_open+0x5e/0xd10 fs/hfsplus/btree.c:142 hfsplus_fill_super+0xabe/0x1c90 fs/hfsplus/super.c:473 mount_bdev+0x271/0x3a0 fs/super.c:1359 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1489 do_new_mount+0x28f/0xae0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5090: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x80 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:518 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0x264/0x3c0 mm/slub.c:3800 hfsplus_put_super+0x1cf/0x330 fs/hfsplus/super.c:300 generic_shutdown_super+0x134/0x310 fs/super.c:492 kill_block_super+0x7e/0xe0 fs/super.c:1386 deactivate_locked_super+0xa4/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1291 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x2e0 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88804482c000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 56 bytes inside of 4096-byte region [ffff88804482c000, ffff88804482d000) The buggy address belongs to the physical page: page:ffffea0001120a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x44828 head:ffffea0001120a00 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012442140 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000040004 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 13074, tgid 13069 (syz-executor.3), ts 383816695764, free_ts 383796977733 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x3449/0x35c0 mm/page_alloc.c:4283 __alloc_pages+0x291/0x7e0 mm/page_alloc.c:5549 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1b8/0x2a0 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0xa2/0x1a0 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x210/0x840 security/tomoyo/file.c:723 security_file_ioctl+0x71/0xa0 security/security.c:1624 __do_sys_ioctl fs/ioctl.c:864 [inline] __se_sys_ioctl+0x47/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare mm/page_alloc.c:1496 [inline] free_unref_page_prepare+0xf3a/0x1040 mm/page_alloc.c:3369 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3464 discard_slab mm/slub.c:2098 [inline] __unfreeze_partials+0x1b1/0x1f0 mm/slub.c:2637 put_cpu_partial+0x116/0x180 mm/slub.c:2713 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x68/0x390 mm/slab.h:761 slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x14c/0x2a0 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node+0xa2/0x190 mm/slab_common.c:975 kmalloc_node include/linux/slab.h:610 [inline] kvmalloc_node+0x72/0x180 mm/util.c:581 kvmalloc include/linux/slab.h:737 [inline] seq_buf_alloc fs/seq_file.c:38 [inline] seq_read_iter+0x202/0xd10 fs/seq_file.c:210 call_read_iter include/linux/fs.h:2183 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7e2/0xbe0 fs/read_write.c:470 ksys_read+0x1a0/0x2c0 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88804482bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804482bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88804482c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804482c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804482c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================