general protection fault in al_destroy

Status: upstream: reported C repro on 2026/08/08 20:09
Subsystems: ntfs3
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+04cf7b83f6dd2c3a54c8@syzkaller.appspotmail.com
First crash: 36d, last: 11m
Cause bisection: introduced by (bisect log) :
commit be310476e8868ebe7a2ce8fb0e7b229535723963
Author: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Date: Thu Jul 30 08:47:44 2026 +0000

  fs/ntfs3: Add basic support for alternative data streams

Crash: general protection fault in al_destroy (log)
Repro: C syz .config
  
✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
9785e01d assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ✅ general protection fault in al_destroy 2026/08/09 05:07 2026/08/09 05:07 2026/08/09 05:16 5d63f80b
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] [ntfs3?] general protection fault in al_destroy 1 (5) 2026/09/03 03:44
[PATCH] fs/ntfs3: Refine the ni cleanup 2 (2) 2026/08/27 09:43
Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/08/27 07:03 26m eadavis@sina.com patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 502d45774af0 OK job log log
Cause bisection attempts (2)
Created Duration User Patch Repo Result
2026/09/02 19:28 8h14m bisect upstream OK (1) job log log
2026/08/26 18:36 0m bisect upstream error

Sample crash report:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000040: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000200-0x0000000000000207]
CPU: 0 UID: 0 PID: 5613 Comm: syz-executor231 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:run_close fs/ntfs3/ntfs_fs.h:1034 [inline]
RIP: 0010:al_destroy+0x49/0xc0 fs/ntfs3/attrlist.c:33
Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 d8 51 0b ff 48 8b 1b 4c 8d b3 00 02 00 00 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 b8 51 0b ff 48 8b bb 00 02 00 00
RSP: 0018:ffffc90004e77960 EFLAGS: 00010202
RAX: 0000000000000040 RBX: 0000000000000000 RCX: ffff88802a8a0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f63cf0 R12: ffff8880293c09e8
R13: dffffc0000000000 R14: 0000000000000200 R15: dffffc0000000000
FS:  000055557585e400(0000) GS:ffff888125bd1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f69727f4000 CR3: 0000000042aba000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ni_clear+0x5d/0x630 fs/ntfs3/frecord.c:110
 evict+0x624/0xb50 fs/inode.c:822
 ntfs_new_inode+0x8c/0x120 fs/ntfs3/fsntfs.c:1719
 ntfs_create_inode+0x6e7/0x3420 fs/ntfs3/inode.c:1520
 ntfs_mkdir+0x37/0x50 fs/ntfs3/namei.c:234
 vfs_mkdir+0x408/0x620 fs/namei.c:5410
 filename_mkdirat+0x289/0x520 fs/namei.c:5443
 __do_sys_mkdirat fs/namei.c:5464 [inline]
 __se_sys_mkdirat+0x35/0x150 fs/namei.c:5461
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2f03aa6a69
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 00 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 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffeca3f53c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2f03aa6a69
RDX: 00000000000001ff RSI: 0000200000000040 RDI: 00000000ffffff9c
RBP: 0000000000000001 R08: 0000000000000000 R09: 000055557585f560
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffeca3f53f0
R13: 0000000000000002 R14: 431bde82d7b634db R15: 00007f2f03b0604b
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	02 00                	add    (%rax),%al
   2:	00 48 89             	add    %cl,-0x77(%rax)
   5:	d8 48 c1             	fmuls  -0x3f(%rax)
   8:	e8 03 42 80 3c       	call   0x3c804210
   d:	38 00                	cmp    %al,(%rax)
   f:	74 08                	je     0x19
  11:	48 89 df             	mov    %rbx,%rdi
  14:	e8 d8 51 0b ff       	call   0xff0b51f1
  19:	48 8b 1b             	mov    (%rbx),%rbx
  1c:	4c 8d b3 00 02 00 00 	lea    0x200(%rbx),%r14
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 b8 51 0b ff       	call   0xff0b51f1
  39:	48 8b bb 00 02 00 00 	mov    0x200(%rbx),%rdi

Crashes (1325):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/09 02:21 upstream 5acbae5f7eb3 243b72f1 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs general protection fault in al_destroy
2026/08/27 17:36 upstream 73e3f0710014 69a01293 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs general protection fault in al_destroy
2026/08/27 05:32 upstream 502d45774af0 a2b77b9e .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root general protection fault in al_destroy
2026/08/25 02:31 upstream 0a0d1d55dad5 614e416a .config strace log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs general protection fault in al_destroy
2026/08/25 01:26 upstream 0a0d1d55dad5 23caa175 .config strace log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root general protection fault in al_destroy
2026/08/22 23:52 upstream 818bebeb63dd 1e72964b .config strace log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs general protection fault in al_destroy
2026/08/22 04:35 upstream 818bebeb63dd 1e72964b .config strace log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs general protection fault in al_destroy
2026/08/21 03:08 upstream 9328b3b03bdc 1e72964b .config strace log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs general protection fault in al_destroy
2026/08/20 22:57 upstream 9328b3b03bdc 1e72964b .config strace log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs general protection fault in al_destroy
2026/08/18 04:45 linux-next e6664f2b33db 1e72964b .config strace log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/16 10:02 linux-next 4477a78374a5 746171ee .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/15 03:21 linux-next 2697ef8943c9 746171ee .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/12 12:31 linux-next 5e6de6a2b522 f8d35649 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/10 04:35 linux-next 6b8c8af514d7 5d63f80b .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/09 01:10 linux-next 6b8c8af514d7 5d63f80b .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/08 20:05 linux-next 6b8c8af514d7 5d63f80b .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/08 19:27 linux-next 6b8c8af514d7 5d63f80b .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/08 19:02 linux-next 6b8c8af514d7 5d63f80b .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/08 18:25 linux-next 6b8c8af514d7 5d63f80b .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/07 09:46 linux-next 1701fda2f58e c38879ea .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/07 08:36 linux-next 1701fda2f58e c38879ea .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/07 07:21 linux-next 1701fda2f58e c38879ea .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/08/07 06:09 linux-next 1701fda2f58e c38879ea .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
2026/09/11 16:28 upstream 08df884136f1 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in al_destroy
2026/09/11 15:21 upstream 08df884136f1 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in al_destroy
2026/09/10 15:44 upstream 50d05c7c76c9 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in al_destroy
2026/09/10 09:09 upstream 50d05c7c76c9 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in al_destroy
2026/09/09 08:04 upstream 5acbae5f7eb3 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in al_destroy
2026/09/09 00:14 upstream 5acbae5f7eb3 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in al_destroy
2026/09/08 19:56 upstream 5acbae5f7eb3 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in al_destroy
2026/09/06 04:00 upstream 214f4aeb2255 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in al_destroy
2026/09/11 20:20 upstream 08df884136f1 9c29f801 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/11 18:28 upstream 08df884136f1 9c29f801 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/11 17:12 upstream 08df884136f1 9c29f801 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/11 12:59 upstream 08df884136f1 9c29f801 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/11 09:02 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/11 07:52 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/11 06:42 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/11 06:31 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/11 05:25 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/11 04:02 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/11 03:00 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/11 01:55 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/11 00:27 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 23:13 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 21:25 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 20:13 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 18:01 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 16:36 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 14:44 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 13:02 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 08:09 upstream 893e11787f78 4e8b1cc6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 06:59 upstream 893e11787f78 4e8b1cc6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 05:49 upstream 893e11787f78 4e8b1cc6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 05:12 upstream 893e11787f78 4e8b1cc6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 03:47 upstream 893e11787f78 4e8b1cc6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/10 01:13 upstream 893e11787f78 4e8b1cc6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/09 21:38 upstream 893e11787f78 edec9137 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/09 20:18 upstream 893e11787f78 edec9137 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/09 19:01 upstream 893e11787f78 edec9137 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/09 17:40 upstream 893e11787f78 edec9137 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/09 17:24 upstream 893e11787f78 edec9137 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/09 16:06 upstream 893e11787f78 edec9137 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/09 14:56 upstream 893e11787f78 edec9137 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/09 13:32 upstream 893e11787f78 edec9137 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/09 09:37 upstream 5acbae5f7eb3 8387c273 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/09 06:31 upstream 5acbae5f7eb3 8387c273 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/09 05:38 upstream 5acbae5f7eb3 8387c273 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/09 03:22 upstream 5acbae5f7eb3 8387c273 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in al_destroy
2026/09/07 04:59 linux-next 9d80aa4617b3 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in al_destroy
* Struck through repros no longer work on HEAD.