syzbot


BUG: unable to handle kernel paging request in map_id_range_down

Status: moderation: reported on 2024/06/10 14:05
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+be87a19ea07545e5c211@syzkaller.appspotmail.com
First crash: 15d, last: 14h08m

Sample crash report:
loop3: detected capacity change from 0 to 4096
ntfs3: loop3: Different NTFS sector size (1024) and media sector size (512).
BUG: unable to handle page fault for address: ffffff8da63d8000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD d97e067 P4D d97e067 PUD 0 
Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 2 PID: 13474 Comm: syz-executor.3 Not tainted 6.10.0-rc2-syzkaller-00097-g2df0193e62cf #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:map_id_range_down+0x8f/0x3a0 kernel/user_namespace.c:318
Code: 00 00 48 89 44 24 70 31 c0 e8 ad 1b 04 00 4c 89 f0 48 c1 e8 03 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 8b 02 00 00 4c 8b 74 24 08 <45> 8b 3e 44 89 3c 24 bf 05 00 00 00 44 89 fe e8 7d 16 04 00 41 83
RSP: 0018:ffffc900032bf798 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc90006139000
RDX: 0000000000040000 RSI: ffffffff8189c943 RDI: ffffff8da63d8000
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100946ce5f
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffff8da63d8000 R14: ffffff8da63d8000 R15: dffffc0000000000
FS:  00007f91508b96c0(0000) GS:ffff88806b200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffff8da63d8000 CR3: 0000000047b1c000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 map_id_down kernel/user_namespace.c:337 [inline]
 make_kuid+0x1f/0x30 kernel/user_namespace.c:414
 i_uid_write include/linux/fs.h:1368 [inline]
 inode_init_always+0x2f6/0xf50 fs/inode.c:174
 alloc_inode+0x7d/0x230 fs/inode.c:268
 iget5_locked fs/inode.c:1235 [inline]
 iget5_locked+0x1c9/0x2c0 fs/inode.c:1228
 ntfs_iget5+0xd1/0x3970 fs/ntfs3/inode.c:532
 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: 0033:0x7f914fa7e5ea
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:00007f91508b8ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f91508b8f80 RCX: 00007f914fa7e5ea
RDX: 0000000020000040 RSI: 0000000020000300 RDI: 00007f91508b8f40
RBP: 0000000020000040 R08: 00007f91508b8f80 R09: 0000000000800000
R10: 0000000000800000 R11: 0000000000000202 R12: 0000000020000300
R13: 00007f91508b8f40 R14: 000000000001f828 R15: 0000000020000640
 </TASK>
Modules linked in:
CR2: ffffff8da63d8000
---[ end trace 0000000000000000 ]---
RIP: 0010:map_id_range_down+0x8f/0x3a0 kernel/user_namespace.c:318
Code: 00 00 48 89 44 24 70 31 c0 e8 ad 1b 04 00 4c 89 f0 48 c1 e8 03 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 8b 02 00 00 4c 8b 74 24 08 <45> 8b 3e 44 89 3c 24 bf 05 00 00 00 44 89 fe e8 7d 16 04 00 41 83
RSP: 0018:ffffc900032bf798 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc90006139000
RDX: 0000000000040000 RSI: ffffffff8189c943 RDI: ffffff8da63d8000
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100946ce5f
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffff8da63d8000 R14: ffffff8da63d8000 R15: dffffc0000000000
FS:  00007f91508b96c0(0000) GS:ffff88806b200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffff8da63d8000 CR3: 0000000047b1c000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	48 89 44 24 70       	mov    %rax,0x70(%rsp)
   7:	31 c0                	xor    %eax,%eax
   9:	e8 ad 1b 04 00       	call   0x41bbb
   e:	4c 89 f0             	mov    %r14,%rax
  11:	48 c1 e8 03          	shr    $0x3,%rax
  15:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax
  19:	84 c0                	test   %al,%al
  1b:	74 08                	je     0x25
  1d:	3c 03                	cmp    $0x3,%al
  1f:	0f 8e 8b 02 00 00    	jle    0x2b0
  25:	4c 8b 74 24 08       	mov    0x8(%rsp),%r14
* 2a:	45 8b 3e             	mov    (%r14),%r15d <-- trapping instruction
  2d:	44 89 3c 24          	mov    %r15d,(%rsp)
  31:	bf 05 00 00 00       	mov    $0x5,%edi
  36:	44 89 fe             	mov    %r15d,%esi
  39:	e8 7d 16 04 00       	call   0x416bb
  3e:	41                   	rex.B
  3f:	83                   	.byte 0x83

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/06 14:01 upstream 2df0193e62cf c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: unable to handle kernel paging request in map_id_range_down
2024/06/21 15:25 upstream 50736169ecc8 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: unable to handle kernel paging request in map_id_range_down
2024/06/19 07:47 upstream 2ccbdf43d5e7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: unable to handle kernel paging request in map_id_range_down
* Struck through repros no longer work on HEAD.