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general protection fault in ocfs2_prepare_dir_for_insert

Status: upstream: reported C repro on 2024/08/20 07:58
Subsystems: ocfs2
[Documentation on labels]
Reported-by: syzbot+5a64828fcc4c2ad9b04f@syzkaller.appspotmail.com
Fix commit: b0fce54b8c0d ocfs2: check dir i_size in ocfs2_find_entry
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-arm32]
First crash: 221d, last: 5d07h
Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: BUG: unable to handle kernel NULL pointer dereference in ocfs2_prepare_dir_for_insert (log)
Repro: C syz .config
  
▶ ▼ Discussions (6)
Title Replies (including bot) Last reply
[syzbot] Monthly ocfs2 report (Dec 2024) 0 (1) 2024/12/26 08:58
[syzbot] Monthly ocfs2 report (Nov 2024) 0 (1) 2024/11/25 10:35
[syzbot] Monthly ocfs2 report (Oct 2024) 0 (1) 2024/10/24 08:02
[syzbot] Monthly ocfs2 report (Sep 2024) 0 (1) 2024/09/23 09:03
[PATCH] ocfs2: Add i_size check for dir 8 (8) 2024/08/21 11:15
[syzbot] [ocfs2?] general protection fault in ocfs2_prepare_dir_for_insert 1 (3) 2024/08/20 11:42
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 BUG: unable to handle kernel paging request in ocfs2_prepare_dir_for_insert origin:upstream C error 13 37d 130d 0/3 upstream: reported C repro on 2024/11/19 13:12
linux-5.15 BUG: unable to handle kernel paging request in ocfs2_prepare_dir_for_insert C 15 24d 41d 0/3 upstream: reported C repro on 2025/02/16 16:33
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/08/20 11:20 20m eadavis@qq.com patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git b0da640826ba OK log

Sample crash report:
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 UID: 0 PID: 5228 Comm: syz-executor314 Not tainted 6.12.0-rc2-syzkaller-00205-g1d227fcc7222 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:ocfs2_find_dir_space_id fs/ocfs2/dir.c:3407 [inline]
RIP: 0010:ocfs2_prepare_dir_for_insert+0x3305/0x5c60 fs/ocfs2/dir.c:4271
Code: 00 00 e8 6e 19 10 fe e9 ba 06 00 00 e8 64 19 10 fe e9 4f 01 00 00 e8 5a 19 10 fe 49 8d 7f 08 49 8d 5f 09 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 bd 23 00 00 48 89 d8 48 c1 e8 03 42 0f
RSP: 0018:ffffc9000363eb00 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000009 RCX: ffff88802e20da00
RDX: 0000000000000000 RSI: 0000000000000400 RDI: 0000000000000008
RBP: ffffc9000363f310 R08: ffffffff8384a0db R09: ffffffff8384f817
R10: 0000000000000002 R11: ffff88802e20da00 R12: dffffc0000000000
R13: ffff88807d3a8878 R14: 0000000000047c88 R15: 0000000000000000
FS:  000055557975a380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe80e43be8 CR3: 0000000028a78000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_mknod+0xcaf/0x2b40 fs/ocfs2/namei.c:292
 ocfs2_create+0x1ab/0x480 fs/ocfs2/namei.c:672
 lookup_open fs/namei.c:3595 [inline]
 open_last_lookups fs/namei.c:3694 [inline]
 path_openat+0x1c03/0x3590 fs/namei.c:3930
 do_filp_open+0x235/0x490 fs/namei.c:3960
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415
 do_sys_open fs/open.c:1430 [inline]
 __do_sys_openat fs/open.c:1446 [inline]
 __se_sys_openat fs/open.c:1441 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1441
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f53b2babd49
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff46a925b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f53b2babd49
RDX: 000000000000275a RSI: 0000000020000180 RDI: 00000000ffffff9c
RBP: 000000000000146b R08: 0000000000004433 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff46a92600
R13: 00007fff46a926e0 R14: 431bde82d7b634db R15: 00007f53b2bf401d
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_find_dir_space_id fs/ocfs2/dir.c:3407 [inline]
RIP: 0010:ocfs2_prepare_dir_for_insert+0x3305/0x5c60 fs/ocfs2/dir.c:4271
Code: 00 00 e8 6e 19 10 fe e9 ba 06 00 00 e8 64 19 10 fe e9 4f 01 00 00 e8 5a 19 10 fe 49 8d 7f 08 49 8d 5f 09 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 bd 23 00 00 48 89 d8 48 c1 e8 03 42 0f
RSP: 0018:ffffc9000363eb00 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000009 RCX: ffff88802e20da00
RDX: 0000000000000000 RSI: 0000000000000400 RDI: 0000000000000008
RBP: ffffc9000363f310 R08: ffffffff8384a0db R09: ffffffff8384f817
R10: 0000000000000002 R11: ffff88802e20da00 R12: dffffc0000000000
R13: ffff88807d3a8878 R14: 0000000000047c88 R15: 0000000000000000
FS:  000055557975a380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe80e43be8 CR3: 0000000028a78000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	e8 6e 19 10 fe       	call   0xfe101975
   7:	e9 ba 06 00 00       	jmp    0x6c6
   c:	e8 64 19 10 fe       	call   0xfe101975
  11:	e9 4f 01 00 00       	jmp    0x165
  16:	e8 5a 19 10 fe       	call   0xfe101975
  1b:	49 8d 7f 08          	lea    0x8(%r15),%rdi
  1f:	49 8d 5f 09          	lea    0x9(%r15),%rbx
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 bd 23 00 00    	jne    0x23f4
  37:	48 89 d8             	mov    %rbx,%rax
  3a:	48 c1 e8 03          	shr    $0x3,%rax
  3e:	42                   	rex.X
  3f:	0f                   	.byte 0xf

Crashes (1071):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/10/11 10:23 upstream 1d227fcc7222 cd942402 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs general protection fault in ocfs2_prepare_dir_for_insert
2024/11/10 06:21 upstream de2f378f2b77 6b856513 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/08/20 04:20 upstream b0da640826ba 9f0ab3fb .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/10/29 13:20 upstream e42b1a9a2557 66aeb999 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in ocfs2_prepare_dir_for_insert
2024/10/27 09:12 upstream 850925a8133c 65e8686b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in ocfs2_prepare_dir_for_insert
2025/03/24 10:18 upstream 586de92313fc 875573af .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/03/18 08:37 upstream fc444ada1310 ce3352cd .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/03/17 13:36 upstream 4701f33a1070 948c34e4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/03/03 16:17 upstream 7eb172143d55 c3901742 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/20 05:42 upstream 9528d418de4d f2cb035c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/16 21:23 upstream ce69b4019001 f9e07a6e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/15 06:22 upstream c3812b15000c 7315a7cf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/13 20:38 upstream 5bc55a333a2f 249ceea9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/13 13:12 upstream 5bc55a333a2f 249ceea9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/09 17:22 upstream eea6e4b4dfb8 9220929f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/08 10:29 upstream 09a0fa92e5b4 f3558dbf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/05 10:54 upstream ab75170520d4 f3558dbf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/03 22:16 upstream 0bc21e701a6f 96d578a3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/02 23:45 upstream 0bc21e701a6f d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/02 14:48 upstream 56e6a3499e14 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/01 16:25 upstream ccb98ccef0e5 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2025/01/01 13:38 upstream ccb98ccef0e5 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/31 06:35 upstream ccb98ccef0e5 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/27 14:18 upstream d6ef8b40d075 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/27 06:32 upstream d6ef8b40d075 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/27 00:19 upstream d6ef8b40d075 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/26 08:38 upstream 9b2ffa6148b1 444551c4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/25 21:15 upstream 9b2ffa6148b1 444551c4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/21 03:01 upstream e9b8ffafd20a d7f584ee .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/20 21:42 upstream 8faabc041a00 49cfeac8 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/20 00:27 upstream baaa2567a712 c87fa8a3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/19 06:31 upstream eabcdba3ad40 1432fc84 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/17 09:31 upstream f44d154d6e3d f93b2b55 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/12 06:28 upstream 231825b2e1ff 6f1b0fa8 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/10 22:40 upstream 7cb1b4663150 cfc402b4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/09 08:01 upstream 62b5a46999c7 9ac0fdc6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/09 05:27 upstream 62b5a46999c7 9ac0fdc6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/06 03:19 upstream 5076001689e4 946d28f0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/02 16:14 upstream e70140ba0d2b b499ea68 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/11/30 23:29 upstream d8b78066f4c9 68914665 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/31 11:10 linux-next 8155b4ef3466 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/28 01:48 linux-next 8155b4ef3466 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/25 17:16 linux-next 8155b4ef3466 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in ocfs2_prepare_dir_for_insert
2024/12/02 12:19 linux-next f486c8aa16b8 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in ocfs2_prepare_dir_for_insert
2025/03/03 04:50 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e056da87c780 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in ocfs2_prepare_dir_for_insert
2025/01/17 11:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6251d1776bc5 f9e07a6e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in ocfs2_prepare_dir_for_insert
2025/01/16 15:01 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6251d1776bc5 968edaf4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in ocfs2_prepare_dir_for_insert
2024/12/24 09:11 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 573067a5a685 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in ocfs2_prepare_dir_for_insert
2024/12/02 01:41 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 7b1d1d4cfac0 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in ocfs2_prepare_dir_for_insert
2024/12/01 03:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 7b1d1d4cfac0 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in ocfs2_prepare_dir_for_insert
* Struck through repros no longer work on HEAD.