syzbot


WARNING: held lock freed in alloc_super

Status: upstream: reported on 2024/05/21 03:32
Subsystems: ntfs3
[Documentation on labels]
Reported-by: syzbot+6b2e22a2beb29d5b5a50@syzkaller.appspotmail.com
First crash: 42d, last: 23d
Discussions (1)
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[syzbot] [ntfs3?] WARNING: held lock freed in alloc_super 0 (1) 2024/05/21 03:32

Sample crash report:
=========================
WARNING: held lock freed!
6.9.0-syzkaller-11924-gde7e71ef8bed #0 Not tainted
-------------------------
syz-executor.0/5939 is freeing memory ffff888045958098-ffff888045958127, with a lock still held there!
ffff8880459580e0 (&type->s_umount_key#66/1){+.+.}-{3:3}, at: alloc_super+0x23d/0xbd0 fs/super.c:344
1 lock held by syz-executor.0/5939:
 #0: ffff8880459580e0 (&type->s_umount_key#66/1){+.+.}-{3:3}, at: alloc_super+0x23d/0xbd0 fs/super.c:344

stack backtrace:
CPU: 2 PID: 5939 Comm: syz-executor.0 Not tainted 6.9.0-syzkaller-11924-gde7e71ef8bed #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 print_freed_lock_bug kernel/locking/lockdep.c:6538 [inline]
 debug_check_no_locks_freed+0x203/0x2a0 kernel/locking/lockdep.c:6571
 debug_mutex_init+0x1b/0x70 kernel/locking/mutex-debug.c:87
 ntfs_alloc_inode+0x5b/0x70 fs/ntfs3/super.c:569
 alloc_inode+0x5d/0x230 fs/inode.c:261
 iget5_locked fs/inode.c:1235 [inline]
 iget5_locked+0x1c9/0x2c0 fs/inode.c:1228
 ntfs_iget5+0xd1/0x3950 fs/ntfs3/inode.c:531
 ntfs_fill_super+0x3738/0x4460 fs/ntfs3/super.c:1485
 get_tree_bdev+0x36f/0x610 fs/super.c:1615
 vfs_get_tree+0x8f/0x380 fs/super.c:1780
 do_new_mount fs/namespace.c:3352 [inline]
 path_mount+0x14e6/0x1f20 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __x64_sys_mount+0x297/0x320 fs/namespace.c:3875
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd202e7e5ea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd203c66ef8 EFLAGS: 00000202
 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fd203c66f80 RCX: 00007fd202e7e5ea
RDX: 00000000200000c0 RSI: 0000000020000100 RDI: 00007fd203c66f40
RBP: 00000000200000c0 R08: 00007fd203c66f80 R09: 0000000000008080
R10: 0000000000008080 R11: 0000000000000202 R12: 0000000020000100
R13: 00007fd203c66f40 R14: 000000000001f3ab R15: 00000000200003c0
 </TASK>
ntfs3: loop0: try to read out of volume at offset 0x9000
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#2] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
CPU: 2 PID: 5939 Comm: syz-executor.0 Tainted: G      D            6.9.0-syzkaller-11924-gde7e71ef8bed #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:iput_final fs/inode.c:1710 [inline]
RIP: 0010:iput.part.0+0x38c/0x7f0 fs/inode.c:1767
Code: 8c ff 48 8b 44 24 10 48 85 c0 0f 85 f5 02 00 00 e8 09 4d 8c ff 49 8d 7e 28 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d4 03 00 00 49 8b 46 28 48 85 c0 48 89 44 24 10
RSP: 0018:ffffc900045d78b8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888045958250 RCX: ffffc90005562000
RDX: 0000000000000005 RSI: ffffffff82019f87 RDI: 0000000000000028
RBP: ffff888045958458 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 6c203a337366746e R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888045958328
FS:  00007fd203c676c0(0000) GS:ffff88806b200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd1f8dff800 CR3: 000000001ec70000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 iput+0x5c/0x80 fs/inode.c:1757
 ntfs_read_mft fs/ntfs3/inode.c:502 [inline]
 ntfs_iget5+0x6b9/0x3950 fs/ntfs3/inode.c:538
 ntfs_fill_super+0x3738/0x4460 fs/ntfs3/super.c:1485
----------------
Code disassembly (best guess):
   0:	8c ff                	mov    %?,%edi
   2:	48 8b 44 24 10       	mov    0x10(%rsp),%rax
   7:	48 85 c0             	test   %rax,%rax
   a:	0f 85 f5 02 00 00    	jne    0x305
  10:	e8 09 4d 8c ff       	call   0xff8c4d1e
  15:	49 8d 7e 28          	lea    0x28(%r14),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 d4 03 00 00    	jne    0x408
  34:	49 8b 46 28          	mov    0x28(%r14),%rax
  38:	48 85 c0             	test   %rax,%rax
  3b:	48 89 44 24 10       	mov    %rax,0x10(%rsp)

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/23 10:18 upstream de7e71ef8bed c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING: held lock freed in alloc_super
2024/05/21 03:31 upstream 6e51b4b5bbc0 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING: held lock freed in alloc_super
2024/05/17 21:42 upstream ff2632d7d08e c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING: held lock freed in alloc_super
2024/05/04 05:55 upstream 3d25a941ea50 610f2a54 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING: held lock freed in alloc_super
2024/05/20 23:41 upstream 6e51b4b5bbc0 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: held lock freed in alloc_super
2024/05/16 20:45 upstream 3c999d1ae3c7 ad5321c6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: held lock freed in alloc_super
* Struck through repros no longer work on HEAD.