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general protection fault in step_into

Status: upstream: reported C repro on 2024/04/13 08:21
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+6ec068ed1982a8402704@syzkaller.appspotmail.com
First crash: 375d, last: 4d18h
Fix commit to backport (bisect log) :
tree: upstream
commit 7ffa8f3d30236e0ab897c30bdb01224ff1fe1c89
Author: Matthew Wilcox (Oracle) <willy@infradead.org>
Date: Mon Jan 15 07:20:25 2024 +0000

  fs: Remove NTFS classic

  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2024/04/29 linux-5.15.y (ToT) b925f60c6ee7 C [report] general protection fault in step_into
2024/04/29 upstream (ToT) e67572cd2204 C Didn't crash
▶ ▼ Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in step_into fs 1 1697d 1693d 0/28 auto-closed as invalid on 2020/11/28 01:59
android-5-10 general protection fault in step_into C done 218 4d20h 710d 0/2 upstream: reported C repro on 2023/05/14 14:12
linux-6.1 KASAN: null-ptr-deref Read in step_into origin:lts-only C inconclusive 49 3d21h 382d 0/3 upstream: reported C repro on 2024/04/06 11:08
android-5-15 general protection fault in step_into origin:downstream C done 86 8d14h 710d 0/2 upstream: reported C repro on 2023/05/14 14:01
android-6-1 general protection fault in step_into origin:downstream C done 75 3d03h 710d 0/2 upstream: reported C repro on 2023/05/14 14:12
upstream BUG: unable to handle kernel paging request in step_into ntfs3 C error done 5 473d 840d 0/28 auto-obsoleted due to no activity on 2024/05/25 15:27
▶ ▼ Last patch testing requests (5)
Created Duration User Patch Repo Result
2024/12/31 06:23 58m retest repro linux-5.15.y report log
2024/12/31 06:23 14m retest repro linux-5.15.y report log
2024/12/07 05:49 11m retest repro linux-5.15.y report log
2024/10/07 14:55 14m retest repro linux-5.15.y report log
2024/10/07 14:55 11m retest repro linux-5.15.y report log
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2024/06/23 11:11 6h14m fix candidate upstream OK (1) job log

Sample crash report:
ntfs: (device loop0): ntfs_ucstonls(): Unicode name contains characters that cannot be converted to character set macinuit.  You might want to try to use the mount option nls=utf8.
ntfs: (device loop0): ntfs_filldir(): Skipping unrepresentable inode 0x4.
ntfs: (device loop0): ntfs_lookup(): ntfs_lookup_ino_by_name() failed with error code -24.
general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 1 PID: 3499 Comm: syz-executor198 Not tainted 5.15.154-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:traverse_mounts fs/namei.c:1378 [inline]
RIP: 0010:handle_mounts fs/namei.c:1498 [inline]
RIP: 0010:step_into+0x1c0/0xe90 fs/namei.c:1806
Code: 48 0f 85 b1 0a 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 20 e8 ef 9a f0 ff 48 8b 9c 24 d8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 9e 0a 00 00 8b 1b 89 de 81 e6 00 00 07
RSP: 0018:ffffc900011df980 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: ffff888018b4bb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900011dfad0 R08: ffffffff81d98369 R09: ffffed100e3338c1
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200023bf4b
R13: ffffc900011dfcc0 R14: dffffc0000000000 R15: 0000000000000080
FS:  0000555555aef380(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe8a620f88 CR3: 000000007a08c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 walk_component+0x359/0x610 fs/namei.c:1982
 lookup_last fs/namei.c:2431 [inline]
 path_lookupat+0x16f/0x450 fs/namei.c:2455
 filename_lookup+0x230/0x5c0 fs/namei.c:2484
 user_path_at_empty+0x40/0x180 fs/namei.c:2883
 user_path_at include/linux/namei.h:57 [inline]
 ksys_umount fs/namespace.c:1779 [inline]
 __do_sys_umount fs/namespace.c:1787 [inline]
 __se_sys_umount fs/namespace.c:1785 [inline]
 __x64_sys_umount+0xf0/0x170 fs/namespace.c:1785
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd944192587
Code: 09 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe8a6211e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd944192587
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe8a6212a0
RBP: 00007ffe8a6212a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffe8a622390
R13: 0000555555b00740 R14: 0000555555aef338 R15: 00007ffe8a624510
 </TASK>
Modules linked in:
---[ end trace 1a01f4b99999cb77 ]---
RIP: 0010:traverse_mounts fs/namei.c:1378 [inline]
RIP: 0010:handle_mounts fs/namei.c:1498 [inline]
RIP: 0010:step_into+0x1c0/0xe90 fs/namei.c:1806
Code: 48 0f 85 b1 0a 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 20 e8 ef 9a f0 ff 48 8b 9c 24 d8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 9e 0a 00 00 8b 1b 89 de 81 e6 00 00 07
RSP: 0018:ffffc900011df980 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: ffff888018b4bb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900011dfad0 R08: ffffffff81d98369 R09: ffffed100e3338c1
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200023bf4b
R13: ffffc900011dfcc0 R14: dffffc0000000000 R15: 0000000000000080
FS:  0000555555aef380(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b017e5f9a8 CR3: 000000007a08c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 0f 85 b1 0a 00 00 	rex.W jne 0xab8
   7:	44 8b 3b             	mov    (%rbx),%r15d
   a:	43 80 3c 34 00       	cmpb   $0x0,(%r12,%r14,1)
   f:	74 0a                	je     0x1b
  11:	48 8b 7c 24 20       	mov    0x20(%rsp),%rdi
  16:	e8 ef 9a f0 ff       	call   0xfff09b0a
  1b:	48 8b 9c 24 d8 00 00 	mov    0xd8(%rsp),%rbx
  22:	00
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 9e 0a 00 00    	jne    0xad5
  37:	8b 1b                	mov    (%rbx),%ebx
  39:	89 de                	mov    %ebx,%esi
  3b:	81                   	.byte 0x81
  3c:	e6 00                	out    %al,$0x0
  3e:	00 07                	add    %al,(%rdi)

Crashes (192):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/13 10:12 linux-5.15.y cdfd0a7f0139 c8349e48 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan general protection fault in step_into
2025/03/21 04:55 linux-5.15.y 0c935c049b5c 62330552 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/03/15 21:43 linux-5.15.y 0c935c049b5c e2826670 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/02/26 10:20 linux-5.15.y c16c81c81336 d34966d1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2024/11/10 18:59 linux-5.15.y 3c17fc483905 6b856513 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2024/06/12 23:07 linux-5.15.y c61bd26ae81a f815599d .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/04/14 20:59 linux-5.15.y f7347f400572 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2025/04/14 00:50 linux-5.15.y f7347f400572 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/09/08 11:30 linux-5.15.y 14e468424d3e 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/09/01 02:31 linux-5.15.y fa93fa65db6e 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/09/01 02:28 linux-5.15.y fa93fa65db6e 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/28 02:28 linux-5.15.y fa93fa65db6e 6c853ff9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/26 23:11 linux-5.15.y fa93fa65db6e 9aee4e0b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/26 22:08 linux-5.15.y fa93fa65db6e 9aee4e0b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/26 17:34 linux-5.15.y fa93fa65db6e 9aee4e0b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/26 14:51 linux-5.15.y fa93fa65db6e 9aee4e0b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/25 19:27 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/25 10:45 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/25 10:35 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/25 07:59 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/25 06:37 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/25 05:15 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/25 04:32 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/25 03:32 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/25 02:25 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/25 01:12 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/24 22:26 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/24 21:36 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/08/24 10:55 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2024/04/13 08:21 linux-5.15.y cdfd0a7f0139 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in step_into
2025/04/19 02:50 linux-5.15.y f7347f400572 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/04/06 23:45 linux-5.15.y 0c935c049b5c 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/04/02 23:04 linux-5.15.y 0c935c049b5c c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/03/15 04:41 linux-5.15.y 0c935c049b5c e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/03/15 03:10 linux-5.15.y 0c935c049b5c e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/03/08 14:27 linux-5.15.y c16c81c81336 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/03/07 07:37 linux-5.15.y c16c81c81336 831e3629 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/03/04 21:20 linux-5.15.y c16c81c81336 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/02/28 07:29 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/02/28 01:54 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/02/26 09:01 linux-5.15.y c16c81c81336 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/02/12 09:31 linux-5.15.y c16c81c81336 f2baddf5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/01/08 06:31 linux-5.15.y 91786f140358 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2025/01/08 01:52 linux-5.15.y 91786f140358 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2024/12/08 16:18 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2024/11/22 18:23 linux-5.15.y 0a51d2d4527b 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2024/11/10 17:57 linux-5.15.y 3c17fc483905 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2024/09/19 02:43 linux-5.15.y 3a5928702e71 c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2024/09/18 16:16 linux-5.15.y 3a5928702e71 c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2024/08/31 15:08 linux-5.15.y fa93fa65db6e 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2024/08/27 11:51 linux-5.15.y fa93fa65db6e 9aee4e0b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
2024/08/24 12:02 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: null-ptr-deref Read in step_into
* Struck through repros no longer work on HEAD.