BUG: unable to handle kernel paging request in debug_check_no_obj_freed (3)

[syzbot‏]

Hello,

syzbot found the following issue on:

HEAD commit: 4a57a8400075 vf/remap: return the amount of bytes actually..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15a613f6080000
kernel config: https://syzkaller.appspot.com/x/.config?x=970ac5ffe160d24
dashboard link: https://syzkaller.appspot.com/bug?extid=ff85912f641cd241173b
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [almaz.ale...@paragon-software.com linux-...@vger.kernel.org nt...@lists.linux.dev]

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ff8591...@syzkaller.appspotmail.com

BUG: unable to handle page fault for address: ffffed11035786bc
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 7ffcd067 P4D 7ffcd067 PUD 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 2 PID: 12575 Comm: syz-executor.3 Not tainted 5.19.0-rc6-syzkaller-00115-g4a57a8400075 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:978 [inline]
RIP: 0010:debug_check_no_obj_freed+0x101/0x420 lib/debugobjects.c:1020
Code: 03 00 00 48 8b 44 24 20 4c 8b 00 4d 85 c0 0f 84 59 02 00 00 49 bd 22 01 00 00 00 00 ad de 4c 89 c0 31 ed 48 c1 e8 03 41 89 ec <42> 80 3c 38 00 0f 85 d2 00 00 00 49 8d 78 18 41 83 c4 01 49 8b 28
RSP: 0018:ffffc90003dcfa00 EFLAGS: 00010806
RAX: 1ffff110035786bd RBX: ffff888024b12000 RCX: ffffffff815dfb50
RDX: 1ffffffff222995b RSI: 0000000000000004 RDI: ffffc90003dcf970
RBP: 0000000000000000 R08: ffff88801abc35e8 R09: 0000000000000003
R10: fffff520007b9f2e R11: 0000000000000001 R12: 0000000000000000
R13: dead000000000122 R14: dead000000000100 R15: dffffc00ffffffff
FS: 00007fb12665f700(0000) GS:ffff88802ca00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed11035786bc CR3: 000000001e16c000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
kfree+0xd6/0x310 mm/slab.c:3795
mi_clear fs/ntfs3/ntfs_fs.h:1105 [inline]
ni_clear+0x287/0x690 fs/ntfs3/frecord.c:132
evict+0x2ed/0x6b0 fs/inode.c:664
iput_final fs/inode.c:1744 [inline]
iput.part.0+0x562/0x820 fs/inode.c:1770
iput+0x58/0x70 fs/inode.c:1760
ntfs_fill_super+0x2d66/0x3730 fs/ntfs3/super.c:1180
get_tree_bdev+0x440/0x760 fs/super.c:1292
vfs_get_tree+0x89/0x2f0 fs/super.c:1497
do_new_mount fs/namespace.c:3040 [inline]
path_mount+0x1320/0x1fa0 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]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb12548a73a
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 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:00007fb12665ef88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fb12548a73a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fb12665efe0
RBP: 00007fb12665f020 R08: 00007fb12665f020 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007fb12665efe0 R15: 000000002007a980
</TASK>
Modules linked in:
CR2: ffffed11035786bc
---[ end trace 0000000000000000 ]---
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:978 [inline]
RIP: 0010:debug_check_no_obj_freed+0x101/0x420 lib/debugobjects.c:1020
Code: 03 00 00 48 8b 44 24 20 4c 8b 00 4d 85 c0 0f 84 59 02 00 00 49 bd 22 01 00 00 00 00 ad de 4c 89 c0 31 ed 48 c1 e8 03 41 89 ec <42> 80 3c 38 00 0f 85 d2 00 00 00 49 8d 78 18 41 83 c4 01 49 8b 28
RSP: 0018:ffffc90003dcfa00 EFLAGS: 00010806
RAX: 1ffff110035786bd RBX: ffff888024b12000 RCX: ffffffff815dfb50
RDX: 1ffffffff222995b RSI: 0000000000000004 RDI: ffffc90003dcf970
RBP: 0000000000000000 R08: ffff88801abc35e8 R09: 0000000000000003
R10: fffff520007b9f2e R11: 0000000000000001 R12: 0000000000000000
R13: dead000000000122 R14: dead000000000100 R15: dffffc00ffffffff
FS: 00007fb12665f700(0000) GS:ffff88802ca00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed11035786bc CR3: 000000001e16c000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 03 00 add (%rax),%eax
2: 00 48 8b add %cl,-0x75(%rax)
5: 44 24 20 rex.R and $0x20,%al
8: 4c 8b 00 mov (%rax),%r8
b: 4d 85 c0 test %r8,%r8
e: 0f 84 59 02 00 00 je 0x26d
14: 49 bd 22 01 00 00 00 movabs $0xdead000000000122,%r13
1b: 00 ad de
1e: 4c 89 c0 mov %r8,%rax
21: 31 ed xor %ebp,%ebp
23: 48 c1 e8 03 shr $0x3,%rax
27: 41 89 ec mov %ebp,%r12d
* 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction
2f: 0f 85 d2 00 00 00 jne 0x107
35: 49 8d 78 18 lea 0x18(%r8),%rdi
39: 41 83 c4 01 add $0x1,%r12d
3d: 49 8b 28 mov (%r8),%rbp


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[syzbot‏]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.