Hello, syzbot found the following issue on: HEAD commit: e33c4963bf53 Merge tag 'nfsd-6.9-5' of git://git.kernel.or.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=16f9787b180000 kernel config: https://syzkaller.appspot.com/x/.config?x=5a05c230e142f2bc dashboard link: https://syzkaller.appspot.com/bug?extid=5d34cc6474499a5ff516 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11655ed8980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12499380980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e06aabc50597/disk-e33c4963.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ac50f00a131e/vmlinux-e33c4963.xz kernel image: https://storage.googleapis.com/syzbot-assets/21fd2a443e16/bzImage-e33c4963.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/9a3efbc77ff7/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5d34cc6474499a5ff516@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: slab-use-after-free in __list_add_valid_or_report+0x4c/0xf0 lib/list_debug.c:29 Read of size 8 at addr ffff888076eed7c8 by task syz-executor427/5079 CPU: 0 PID: 5079 Comm: syz-executor427 Not tainted 6.9.0-rc5-syzkaller-00053-ge33c4963bf53 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 __list_add_valid_or_report+0x4c/0xf0 lib/list_debug.c:29 __list_add_valid include/linux/list.h:88 [inline] __list_add include/linux/list.h:150 [inline] list_add include/linux/list.h:169 [inline] chrdev_open+0x2a9/0x630 fs/char_dev.c:396 do_dentry_open+0x907/0x15a0 fs/open.c:955 do_open fs/namei.c:3642 [inline] path_openat+0x2860/0x3240 fs/namei.c:3799 do_filp_open+0x235/0x490 fs/namei.c:3826 do_sys_openat2+0x13e/0x1d0 fs/open.c:1406 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1432 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f722cb71329 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff23332778 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f722cb71329 RDX: 0000000000000000 RSI: 0000000020002140 RDI: ffffffffffffff9c RBP: 0000000000000000 R08: 00007fff233327b0 R09: 00007fff233327b0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff2333279c R13: 0000000000000001 R14: 431bde82d7b634db R15: 00007fff233327d0 </TASK> Allocated by task 5077: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc_lru+0x178/0x350 mm/slub.c:3864 alloc_inode_sb include/linux/fs.h:3091 [inline] ntfs_alloc_inode+0x28/0x80 fs/ntfs3/super.c:557 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x69/0x1e0 fs/inode.c:1007 new_inode+0x22/0x1d0 fs/inode.c:1033 ntfs_new_inode+0x45/0x100 fs/ntfs3/fsntfs.c:1688 ntfs_create_inode+0x687/0x3c30 fs/ntfs3/inode.c:1333 ntfs_mknod+0x41/0x60 fs/ntfs3/namei.c:128 vfs_mknod+0x36d/0x3b0 fs/namei.c:4001 do_mknodat+0x3ec/0x5b0 __do_sys_mknodat fs/namei.c:4079 [inline] __se_sys_mknodat fs/namei.c:4076 [inline] __x64_sys_mknodat+0xa9/0xc0 fs/namei.c:4076 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 0: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kmem_cache_free+0x10b/0x2c0 mm/slub.c:4344 rcu_do_batch kernel/rcu/tree.c:2196 [inline] rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2471 __do_softirq+0x2c6/0x980 kernel/softirq.c:554 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 __call_rcu_common kernel/rcu/tree.c:2734 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2838 __dentry_kill+0x20d/0x630 fs/dcache.c:603 shrink_kill+0xa9/0x2c0 fs/dcache.c:1048 shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1075 shrink_dcache_parent+0xcb/0x3b0 do_one_tree+0x23/0xe0 fs/dcache.c:1538 shrink_dcache_for_umount+0x7d/0x130 fs/dcache.c:1555 generic_shutdown_super+0x6a/0x2d0 fs/super.c:619 kill_block_super+0x44/0x90 fs/super.c:1675 ntfs3_kill_sb+0x44/0x1b0 fs/ntfs3/super.c:1785 deactivate_locked_super+0xc4/0x130 fs/super.c:472 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267 task_work_run+0x24f/0x310 kernel/task_work.c:180 ptrace_notify+0x2d2/0x380 kernel/signal.c:2404 ptrace_report_syscall include/linux/ptrace.h:415 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline] syscall_exit_work+0xc6/0x190 kernel/entry/common.c:173 syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline] syscall_exit_to_user_mode+0x273/0x370 kernel/entry/common.c:218 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888076eed120 which belongs to the cache ntfs_inode_cache of size 1760 The buggy address is located 1704 bytes inside of freed 1760-byte region [ffff888076eed120, ffff888076eed800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76ee8 head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffffff() raw: 00fff80000000840 ffff888019777dc0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000110011 00000001ffffffff 0000000000000000 head: 00fff80000000840 ffff888019777dc0 dead000000000122 0000000000000000 head: 0000000000000000 0000000000110011 00000001ffffffff 0000000000000000 head: 00fff80000000003 ffffea0001dbba01 dead000000000122 00000000ffffffff head: 0000000800000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 5077, tgid 1360935967 (syz-executor427), ts 5077, free_ts 25749663853 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317 __alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page+0x5f/0x160 mm/slub.c:2175 allocate_slab mm/slub.c:2338 [inline] new_slab+0x84/0x2f0 mm/slub.c:2391 ___slab_alloc+0xc73/0x1260 mm/slub.c:3525 __slab_alloc mm/slub.c:3610 [inline] __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmem_cache_alloc_lru+0x253/0x350 mm/slub.c:3864 alloc_inode_sb include/linux/fs.h:3091 [inline] ntfs_alloc_inode+0x28/0x80 fs/ntfs3/super.c:557 alloc_inode fs/inode.c:261 [inline] iget5_locked+0xa4/0x280 fs/inode.c:1235 ntfs_iget5+0xc7/0x3b70 fs/ntfs3/inode.c:525 ntfs_fill_super+0x2f01/0x49c0 fs/ntfs3/super.c:1300 get_tree_bdev+0x3f7/0x570 fs/super.c:1614 vfs_get_tree+0x90/0x2a0 fs/super.c:1779 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x97b/0xaa0 mm/page_alloc.c:2347 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487 free_contig_range+0x9e/0x160 mm/page_alloc.c:6572 destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1036 debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1416 do_one_initcall+0x248/0x880 init/main.c:1245 do_initcall_level+0x157/0x210 init/main.c:1307 do_initcalls+0x3f/0x80 init/main.c:1323 kernel_init_freeable+0x435/0x5d0 init/main.c:1555 kernel_init+0x1d/0x2b0 init/main.c:1444 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff888076eed680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888076eed700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888076eed780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888076eed800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888076eed880: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
