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general protection fault in do_renameat2

Status: upstream: reported C repro on 2023/09/17 05:40
Bug presence: origin:downstream
[Documentation on labels]
Reported-by: syzbot+0440f4da8a24a4698145@syzkaller.appspotmail.com
First crash: 637d, last: 13d
Cause bisection: introduced by (bisect log) :
commit 57f3ff9648991998d008ecf32f2f9e78a08bfb8b
Author: Daniel Rosenberg <drosen@google.com>
Date: Thu Dec 2 21:50:02 2021 +0000

  ANDROID: fuse-bpf v1.1

Crash: BUG: unable to handle kernel NULL pointer dereference in do_renameat2 (log)
Repro: C syz .config
  
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2023/09/17 android14-6.1 (ToT) d3212c2dbaba C [report] general protection fault in do_renameat2
2023/09/17 lts (merge base) b1644a0031cf C Didn't crash
2023/09/17 upstream (ToT) f0b0d403eabb C Didn't crash
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 general protection fault in do_renameat2 origin:downstream C 41 15d 629d 0/2 upstream: reported C repro on 2023/09/24 22:41
android-5-10 general protection fault in do_renameat2 C 71 11d 639d 0/2 upstream: reported C repro on 2023/09/15 06:30
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2025/05/22 03:25 6m retest repro android14-6.1 report log
2025/05/22 03:25 6m retest repro android14-6.1 report log
2025/05/22 03:25 6m retest repro android14-6.1 report log
2025/05/22 03:25 6m retest repro android14-6.1 report log
2025/05/06 08:06 32m retest repro android14-6.1 report log
2025/04/05 11:52 13m retest repro android14-6.1 report log
2025/03/10 16:08 6m retest repro android14-6.1 report log
2025/03/10 16:08 9m retest repro android14-6.1 report log
2025/03/10 16:08 6m retest repro android14-6.1 report log
2025/03/10 16:08 8m retest repro android14-6.1 report log
▶ ▼ Fix bisection attempts (5)
Created Duration User Patch Repo Result
2024/06/11 07:30 46m bisect fix android14-6.1 OK (0) job log log
2024/01/20 12:34 46m bisect fix android14-6.1 OK (0) job log log
2023/12/20 19:01 53m bisect fix android14-6.1 OK (0) job log log
2023/11/20 16:39 1h04m bisect fix android14-6.1 OK (0) job log log
2023/10/19 18:06 39m bisect fix android14-6.1 OK (0) job log log

Sample crash report:
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: 298 Comm: syz-executor294 Not tainted 6.1.129-syzkaller-00014-gbc3d1d352ab6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__d_entry_type include/linux/dcache.h:394 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:399 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:445 [inline]
RIP: 0010:do_renameat2+0x6fd/0x1480 fs/namei.c:4974
Code: f2 e8 87 f0 fe ff 48 89 c3 48 3d 01 f0 ff ff 72 12 e8 07 6e ab ff 41 89 de 48 8b 5c 24 18 e9 6f 05 00 00 49 89 de 49 c1 ee 03 <43> 0f b6 04 26 84 c0 0f 85 8a 07 00 00 48 89 5c 24 40 8b 1b be 00
RSP: 0018:ffffc90000ee7c20 EFLAGS: 00010207
RAX: 000000000000001e RBX: 000000000000001e RCX: ffff88811068bcc0
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: ffffc90000ee7ee8 R08: ffffffff81cbeed8 R09: fffff520001dcf5d
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc90000ee7e08 R14: 0000000000000003 R15: ffff8881238ec140
FS:  00007f8d4db376c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564ccd385000 CR3: 000000012501e000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __do_sys_rename fs/namei.c:5072 [inline]
 __se_sys_rename fs/namei.c:5070 [inline]
 __x64_sys_rename+0x86/0x90 fs/namei.c:5070
 x64_sys_call+0x266/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:83
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8d4db96539
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8d4db37218 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f8d4dc233f8 RCX: 00007f8d4db96539
RDX: 00007f8d4db73c96 RSI: 00002000000000c0 RDI: 0000200000000100
RBP: 00007f8d4dc233f0 R08: 00007fff4cf42a67 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8d4dbf0034
R13: 0000200000008280 R14: 0000200000000100 R15: 00007fff4cf42a68
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:394 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:399 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:445 [inline]
RIP: 0010:do_renameat2+0x6fd/0x1480 fs/namei.c:4974
Code: f2 e8 87 f0 fe ff 48 89 c3 48 3d 01 f0 ff ff 72 12 e8 07 6e ab ff 41 89 de 48 8b 5c 24 18 e9 6f 05 00 00 49 89 de 49 c1 ee 03 <43> 0f b6 04 26 84 c0 0f 85 8a 07 00 00 48 89 5c 24 40 8b 1b be 00
RSP: 0018:ffffc90000ee7c20 EFLAGS: 00010207
RAX: 000000000000001e RBX: 000000000000001e RCX: ffff88811068bcc0
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: ffffc90000ee7ee8 R08: ffffffff81cbeed8 R09: fffff520001dcf5d
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc90000ee7e08 R14: 0000000000000003 R15: ffff8881238ec140
FS:  00007f8d4db376c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564ccd385000 CR3: 000000012501e000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	f2 e8 87 f0 fe ff    	bnd call 0xfffef08d
   6:	48 89 c3             	mov    %rax,%rbx
   9:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   f:	72 12                	jb     0x23
  11:	e8 07 6e ab ff       	call   0xffab6e1d
  16:	41 89 de             	mov    %ebx,%r14d
  19:	48 8b 5c 24 18       	mov    0x18(%rsp),%rbx
  1e:	e9 6f 05 00 00       	jmp    0x592
  23:	49 89 de             	mov    %rbx,%r14
  26:	49 c1 ee 03          	shr    $0x3,%r14
* 2a:	43 0f b6 04 26       	movzbl (%r14,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 8a 07 00 00    	jne    0x7c1
  37:	48 89 5c 24 40       	mov    %rbx,0x40(%rsp)
  3c:	8b 1b                	mov    (%rbx),%ebx
  3e:	be                   	.byte 0xbe

Crashes (37):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/04/20 18:22 android14-6.1 bc3d1d352ab6 2a20f901 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/11/29 05:53 android14-6.1 93460febf9b8 5df23865 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/07/14 15:31 android14-6.1 96d66062d076 eaeb5c15 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/07/14 14:55 android14-6.1 96d66062d076 eaeb5c15 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/02/18 00:54 android14-6.1 92432f07d663 578f7538 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2023/09/17 05:38 android14-6.1 d3212c2dbaba 0b6a67ac .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2025/06/02 01:49 android14-6.1 db710ea87c32 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2025/05/25 10:16 android14-6.1 3c6d0251e1fb ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2025/04/21 17:41 android14-6.1 bc3d1d352ab6 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2025/04/20 17:54 android14-6.1 bc3d1d352ab6 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2025/04/20 17:54 android14-6.1 bc3d1d352ab6 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2025/02/24 16:05 android14-6.1 a624f97c9afe d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2025/01/10 22:19 android14-6.1 770852bf7d99 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2025/01/10 22:19 android14-6.1 770852bf7d99 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/12/09 02:52 android14-6.1 c276c53965a8 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/09/12 21:03 android14-6.1 b18f8bbc044f 60e1a995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/09/12 21:03 android14-6.1 b18f8bbc044f 60e1a995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/09/08 09:39 android14-6.1 27310ed6b677 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/09/08 09:39 android14-6.1 27310ed6b677 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/09/05 11:31 android14-6.1 03a4ae5d9982 464ac2ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/09/03 11:43 android14-6.1 a1895da8bd3b 326f9c5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/08/14 06:59 android14-6.1 660e1a26952b bde81f6f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/08/13 14:24 android14-6.1 79436849ef1d f21a18ca .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/08/12 18:25 android14-6.1 79436849ef1d 842184b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/08/12 18:25 android14-6.1 79436849ef1d 842184b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/08/11 11:51 android14-6.1 79436849ef1d 6f4edef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/08/11 11:51 android14-6.1 79436849ef1d 6f4edef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/07/30 10:51 android14-6.1 7fa70ede91bb 5187fc86 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/07/30 10:51 android14-6.1 7fa70ede91bb 5187fc86 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/07/28 16:18 android14-6.1 7fa70ede91bb 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/07/28 16:18 android14-6.1 7fa70ede91bb 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/07/14 14:18 android14-6.1 96d66062d076 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/07/14 14:18 android14-6.1 96d66062d076 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/03/31 15:11 android14-6.1 5b8114ec3c92 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/03/24 09:18 android14-6.1 d518ca9dbbe9 0ea90952 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/03/16 10:56 android14-6.1 ef39f76e4d24 d615901c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
2024/02/18 00:34 android14-6.1 92432f07d663 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in do_renameat2
* Struck through repros no longer work on HEAD.