* [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent
@ 2025-06-01 6:11 syzbot
2025-06-20 6:10 ` syzbot
` (3 more replies)
0 siblings, 4 replies; 6+ messages in thread
From: syzbot @ 2025-06-01 6:11 UTC (permalink / raw)
To: jlbec, joseph.qi, linux-kernel, mark, ocfs2-devel, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: c89756bcf406 Merge tag 'pm-6.16-rc1' of git://git.kernel.o..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15fae6d4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=ded97a85afe9a6c8
dashboard link: https://syzkaller.appspot.com/bug?extid=8882b2f5f48a7170a726
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-c89756bc.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b21d74e73303/vmlinux-c89756bc.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b778ededeb75/bzImage-c89756bc.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8882b2f5f48a7170a726@syzkaller.appspotmail.com
------------[ cut here ]------------
kernel BUG at fs/ocfs2/alloc.c:5581!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted 6.15.0-syzkaller-03478-gc89756bcf406 #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ocfs2_remove_extent+0x1ecf/0x2020 fs/ocfs2/alloc.c:5581
Code: fa ff ff 48 8b 4c 24 08 80 e1 07 fe c1 38 c1 0f 8c 95 fa ff ff 48 8b 7c 24 08 e8 4c e8 8f fe e9 86 fa ff ff e8 22 08 2d fe 90 <0f> 0b f3 0f 1e fa 44 89 6c 24 10 65 8b 1d f3 25 06 0f bf 07 00 00
RSP: 0018:ffffc9000d3ee980 EFLAGS: 00010287
RAX: ffffffff8392ea2e RBX: ffffc9000d3ef178 RCX: 0000000000100000
RDX: ffffc9000ee94000 RSI: 000000000004f2da RDI: 000000000004f2db
RBP: ffffc9000d3eecd0 R08: ffff88803c8c4880 R09: 0000000000000006
R10: 00000000fffffffc R11: 0000000000000002 R12: 1ffff1100abcf048
R13: 0000000000000007 R14: ffff888055e78240 R15: dffffc0000000000
FS: 00007f98ae9896c0(0000) GS:ffff88808d28f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb0dc3a17e0 CR3: 000000003e12a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
ocfs2_remove_btree_range+0xdef/0x1540 fs/ocfs2/alloc.c:5778
ocfs2_commit_truncate+0xb64/0x21d0 fs/ocfs2/alloc.c:7373
ocfs2_truncate_file+0xca2/0x1420 fs/ocfs2/file.c:509
ocfs2_setattr+0x1520/0x1b40 fs/ocfs2/file.c:1212
notify_change+0xb33/0xe40 fs/attr.c:552
do_truncate+0x1a4/0x220 fs/open.c:68
handle_truncate fs/namei.c:3508 [inline]
do_open fs/namei.c:3891 [inline]
path_openat+0x306c/0x3830 fs/namei.c:4046
do_filp_open+0x1fa/0x410 fs/namei.c:4073
do_sys_openat2+0x121/0x1c0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_creat fs/open.c:1530 [inline]
__se_sys_creat fs/open.c:1524 [inline]
__x64_sys_creat+0x8f/0xc0 fs/open.c:1524
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f98adb8e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f98ae989038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f98addb6160 RCX: 00007f98adb8e969
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000040
RBP: 00007f98adc10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f98addb6160 R15: 00007ffd2df48568
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_remove_extent+0x1ecf/0x2020 fs/ocfs2/alloc.c:5581
Code: fa ff ff 48 8b 4c 24 08 80 e1 07 fe c1 38 c1 0f 8c 95 fa ff ff 48 8b 7c 24 08 e8 4c e8 8f fe e9 86 fa ff ff e8 22 08 2d fe 90 <0f> 0b f3 0f 1e fa 44 89 6c 24 10 65 8b 1d f3 25 06 0f bf 07 00 00
RSP: 0018:ffffc9000d3ee980 EFLAGS: 00010287
RAX: ffffffff8392ea2e RBX: ffffc9000d3ef178 RCX: 0000000000100000
RDX: ffffc9000ee94000 RSI: 000000000004f2da RDI: 000000000004f2db
RBP: ffffc9000d3eecd0 R08: ffff88803c8c4880 R09: 0000000000000006
R10: 00000000fffffffc R11: 0000000000000002 R12: 1ffff1100abcf048
R13: 0000000000000007 R14: ffff888055e78240 R15: dffffc0000000000
FS: 00007f98ae9896c0(0000) GS:ffff88808d28f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcc92d0d90 CR3: 000000003e12a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent 2025-06-01 6:11 [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent syzbot @ 2025-06-20 6:10 ` syzbot 2025-08-29 1:50 ` syzbot ` (2 subsequent siblings) 3 siblings, 0 replies; 6+ messages in thread From: syzbot @ 2025-06-20 6:10 UTC (permalink / raw) To: jlbec, joseph.qi, linux-kernel, mark, ocfs2-devel, syzkaller-bugs syzbot has found a reproducer for the following issue on: HEAD commit: 2c923c845768 Add linux-next specific files for 20250619 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=153d9d0c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=58afc4b78b52b7e3 dashboard link: https://syzkaller.appspot.com/bug?extid=8882b2f5f48a7170a726 compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11f23d0c580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b4ef8488b2c5/disk-2c923c84.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/97fc575793ea/vmlinux-2c923c84.xz kernel image: https://storage.googleapis.com/syzbot-assets/b8095fa1838d/bzImage-2c923c84.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/3778419fa82a/mount_0.gz fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=1441f5d4580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8882b2f5f48a7170a726@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at fs/ocfs2/alloc.c:5581! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 6023 Comm: syz.1.19 Not tainted 6.16.0-rc2-next-20250619-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:ocfs2_remove_extent+0x1ecf/0x2020 fs/ocfs2/alloc.c:5581 Code: fa ff ff 48 8b 4c 24 08 80 e1 07 fe c1 38 c1 0f 8c 95 fa ff ff 48 8b 7c 24 08 e8 7c 70 8e fe e9 86 fa ff ff e8 d2 49 2a fe 90 <0f> 0b f3 0f 1e fa 44 89 6c 24 10 65 8b 1d 63 61 09 0f bf 07 00 00 RSP: 0000:ffffc9000216e640 EFLAGS: 00010293 RAX: ffffffff83961ebe RBX: ffffc9000216ee38 RCX: ffff888034273c00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000006 RBP: ffffc9000216e990 R08: ffff888034273c00 R09: 0000000000000006 R10: 00000000fffffffc R11: 0000000000000000 R12: 1ffff1100b8fb49a R13: 0000000000000006 R14: ffff88805c7da4d0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125d28000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff5456df38 CR3: 0000000075e08000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ocfs2_remove_btree_range+0xdef/0x1540 fs/ocfs2/alloc.c:5778 ocfs2_commit_truncate+0xb64/0x21d0 fs/ocfs2/alloc.c:7373 ocfs2_truncate_for_delete fs/ocfs2/inode.c:637 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:804 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1093 [inline] ocfs2_evict_inode+0x1138/0x40e0 fs/ocfs2/inode.c:1230 evict+0x501/0x9c0 fs/inode.c:810 ocfs2_dentry_iput+0x247/0x370 fs/ocfs2/dcache.c:407 __dentry_kill+0x209/0x660 fs/dcache.c:669 dput+0x19f/0x2b0 fs/dcache.c:911 __fput+0x68e/0xa70 fs/file_table.c:476 task_work_run+0x1d1/0x260 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x6b5/0x2300 kernel/exit.c:959 do_group_exit+0x21c/0x2d0 kernel/exit.c:1100 get_signal+0x1286/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] irqentry_exit_to_user_mode+0x81/0x120 kernel/entry/common.c:184 exc_page_fault+0x9f/0xf0 arch/x86/mm/fault.c:1535 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f056b38e886 Code: Unable to access opcode bytes at 0x7f056b38e85c. RSP: 002b:00007ffea35be310 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000058 RCX: 00007f056b38e929 RDX: 00007ffea35be350 RSI: 0000000000000000 RDI: 00000000000249f0 RBP: 00007f056b410b39 R08: 0000000000000000 R09: 0000000000000058 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f056b5b5fa0 R14: 00007f056b5b5fa0 R15: 0000000000000002 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_remove_extent+0x1ecf/0x2020 fs/ocfs2/alloc.c:5581 Code: fa ff ff 48 8b 4c 24 08 80 e1 07 fe c1 38 c1 0f 8c 95 fa ff ff 48 8b 7c 24 08 e8 7c 70 8e fe e9 86 fa ff ff e8 d2 49 2a fe 90 <0f> 0b f3 0f 1e fa 44 89 6c 24 10 65 8b 1d 63 61 09 0f bf 07 00 00 RSP: 0000:ffffc9000216e640 EFLAGS: 00010293 RAX: ffffffff83961ebe RBX: ffffc9000216ee38 RCX: ffff888034273c00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000006 RBP: ffffc9000216e990 R08: ffff888034273c00 R09: 0000000000000006 R10: 00000000fffffffc R11: 0000000000000000 R12: 1ffff1100b8fb49a R13: 0000000000000006 R14: ffff88805c7da4d0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125d28000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7a6d9f37b0 CR3: 00000000338ec000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent 2025-06-01 6:11 [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent syzbot 2025-06-20 6:10 ` syzbot @ 2025-08-29 1:50 ` syzbot 2025-10-22 15:04 ` Forwarded: #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 552c50713f273b494ac6c77052032a49bc9255e2 syzbot 2026-01-07 5:41 ` [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent syzbot 3 siblings, 0 replies; 6+ messages in thread From: syzbot @ 2025-08-29 1:50 UTC (permalink / raw) To: jlbec, joseph.qi, linux-kernel, mark, ocfs2-devel, syzkaller-bugs syzbot has found a reproducer for the following issue on: HEAD commit: 07d9df80082b Merge tag 'perf-tools-fixes-for-v6.17-2025-08.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17bdfc42580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a7016efe6aaa498c dashboard link: https://syzkaller.appspot.com/bug?extid=8882b2f5f48a7170a726 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=115a4262580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13087ef0580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-07d9df80.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/64a01edfb5ff/vmlinux-07d9df80.xz kernel image: https://storage.googleapis.com/syzbot-assets/78c915400ff9/bzImage-07d9df80.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/7dc3c9b29fa5/mount_0.gz fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=165a4262580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8882b2f5f48a7170a726@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at fs/ocfs2/alloc.c:5581! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5722 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:ocfs2_remove_extent+0x1ecf/0x2020 fs/ocfs2/alloc.c:5581 Code: fa ff ff 48 8b 4c 24 08 80 e1 07 fe c1 38 c1 0f 8c 95 fa ff ff 48 8b 7c 24 08 e8 4c 35 8d fe e9 86 fa ff ff e8 f2 48 28 fe 90 <0f> 0b f3 0f 1e fa 44 89 6c 24 10 65 8b 1d d3 9d 09 0f bf 07 00 00 RSP: 0018:ffffc9000d56e640 EFLAGS: 00010293 RAX: ffffffff8397724e RBX: ffffc9000d56ee38 RCX: ffff88803eab8000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000007 RBP: ffffc9000d56e990 R08: ffff88803eab8000 R09: 0000000000000006 R10: 00000000fffffffc R11: 0000000000000000 R12: 1ffff11008b38e9a R13: 0000000000000007 R14: ffff8880459c74d0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88808d20f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2cce600218 CR3: 000000004b419000 CR4: 0000000000352ef0 Call Trace: <TASK> ocfs2_remove_btree_range+0xdef/0x1540 fs/ocfs2/alloc.c:5778 ocfs2_commit_truncate+0xb64/0x21d0 fs/ocfs2/alloc.c:7373 ocfs2_truncate_for_delete fs/ocfs2/inode.c:699 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:866 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline] ocfs2_evict_inode+0x1138/0x40e0 fs/ocfs2/inode.c:1292 evict+0x501/0x9c0 fs/inode.c:810 ocfs2_dentry_iput+0x247/0x370 fs/ocfs2/dcache.c:407 __dentry_kill+0x209/0x660 fs/dcache.c:669 dput+0x19f/0x2b0 fs/dcache.c:911 __fput+0x68e/0xa70 fs/file_table.c:476 task_work_run+0x1d4/0x260 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x6b5/0x2300 kernel/exit.c:961 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102 get_signal+0x1286/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:40 [inline] exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] irqentry_exit_to_user_mode+0x81/0x120 kernel/entry/common.c:73 exc_page_fault+0x9f/0xf0 arch/x86/mm/fault.c:1535 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f018c18ebf1 Code: Unable to access opcode bytes at 0x7f018c18ebc7. RSP: 002b:00000000fffffeb0 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f018c3b5fa0 RCX: 00007f018c18ebe9 RDX: 0000000000000000 RSI: 00000000fffffeb0 RDI: 0000000002000400 RBP: 00007f018c211e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f018c3b6038 R14: 00007f018c3b5fa0 R15: 00007ffc298dcef8 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_remove_extent+0x1ecf/0x2020 fs/ocfs2/alloc.c:5581 Code: fa ff ff 48 8b 4c 24 08 80 e1 07 fe c1 38 c1 0f 8c 95 fa ff ff 48 8b 7c 24 08 e8 4c 35 8d fe e9 86 fa ff ff e8 f2 48 28 fe 90 <0f> 0b f3 0f 1e fa 44 89 6c 24 10 65 8b 1d d3 9d 09 0f bf 07 00 00 RSP: 0018:ffffc9000d56e640 EFLAGS: 00010293 RAX: ffffffff8397724e RBX: ffffc9000d56ee38 RCX: ffff88803eab8000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000007 RBP: ffffc9000d56e990 R08: ffff88803eab8000 R09: 0000000000000006 R10: 00000000fffffffc R11: 0000000000000000 R12: 1ffff11008b38e9a R13: 0000000000000007 R14: ffff8880459c74d0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88808d20f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f67141f3000 CR3: 00000000333eb000 CR4: 0000000000352ef0 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. ^ permalink raw reply [flat|nested] 6+ messages in thread
* Forwarded: #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 552c50713f273b494ac6c77052032a49bc9255e2 2025-06-01 6:11 [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent syzbot 2025-06-20 6:10 ` syzbot 2025-08-29 1:50 ` syzbot @ 2025-10-22 15:04 ` syzbot 2026-01-07 5:41 ` [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent syzbot 3 siblings, 0 replies; 6+ messages in thread From: syzbot @ 2025-10-22 15:04 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 552c50713f273b494ac6c77052032a49bc9255e2 Author: dmantipov@yandex.ru #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 552c50713f273b494ac6c77052032a49bc9255e2 diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c index 162711cc5b20..ce38505a823c 100644 --- a/fs/ocfs2/alloc.c +++ b/fs/ocfs2/alloc.c @@ -6164,7 +6164,7 @@ static int ocfs2_get_truncate_log_info(struct ocfs2_super *osb, struct buffer_head *bh = NULL; struct ocfs2_dinode *di; struct ocfs2_truncate_log *tl; - unsigned int tl_count; + unsigned int tl_count, tl_used; inode = ocfs2_get_system_file_inode(osb, TRUNCATE_LOG_SYSTEM_INODE, @@ -6184,9 +6184,10 @@ static int ocfs2_get_truncate_log_info(struct ocfs2_super *osb, di = (struct ocfs2_dinode *)bh->b_data; tl = &di->id2.i_dealloc; + tl_used = le16_to_cpu(tl->tl_used); tl_count = le16_to_cpu(tl->tl_count); if (unlikely(tl_count > ocfs2_truncate_recs_per_inode(osb->sb) || - tl_count == 0)) { + tl_count == 0 || tl_used > tl_count)) { status = -EFSCORRUPTED; iput(inode); brelse(bh); diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c index 8c9c4825f984..2785ff245e79 100644 --- a/fs/ocfs2/dir.c +++ b/fs/ocfs2/dir.c @@ -302,8 +302,21 @@ static int ocfs2_check_dir_entry(struct inode *dir, unsigned long offset) { const char *error_msg = NULL; - const int rlen = le16_to_cpu(de->rec_len); - const unsigned long next_offset = ((char *) de - buf) + rlen; + unsigned long next_offset; + int rlen; + + if (offset > size - OCFS2_DIR_REC_LEN(1)) { + /* Dirent is (maybe partially) beyond the buffer + * boundaries so touching 'de' members is unsafe. + */ + mlog(ML_ERROR, "directory entry (#%llu: offset=%lu) " + "too close to end or out-of-bounds", + (unsigned long long)OCFS2_I(dir)->ip_blkno, offset); + return 0; + } + + rlen = le16_to_cpu(de->rec_len); + next_offset = ((char *) de - buf) + rlen; if (unlikely(rlen < OCFS2_DIR_REC_LEN(1))) error_msg = "rec_len is smaller than minimal"; @@ -778,6 +791,14 @@ static int ocfs2_dx_dir_lookup_rec(struct inode *inode, struct ocfs2_extent_block *eb; struct ocfs2_extent_rec *rec = NULL; + if (le16_to_cpu(el->l_count) != + ocfs2_extent_recs_per_dx_root(inode->i_sb)) { + ret = ocfs2_error(inode->i_sb, + "Inode %lu has invalid extent list length %u\n", + inode->i_ino, le16_to_cpu(el->l_count)); + goto out; + } + if (el->l_tree_depth) { ret = ocfs2_find_leaf(INODE_CACHE(inode), el, major_hash, &eb_bh); @@ -3423,6 +3444,14 @@ static int ocfs2_find_dir_space_id(struct inode *dir, struct buffer_head *di_bh, offset += le16_to_cpu(de->rec_len); } + if (!last_de) { + ret = ocfs2_error(sb, "Directory entry (#%llu: size=%lld) " + "is unexpectedly short", + (unsigned long long)OCFS2_I(dir)->ip_blkno, + i_size_read(dir)); + goto out; + } + /* * We're going to require expansion of the directory - figure * out how many blocks we'll need so that a place for the @@ -4104,10 +4133,15 @@ static int ocfs2_expand_inline_dx_root(struct inode *dir, } dx_root->dr_flags &= ~OCFS2_DX_FLAG_INLINE; - memset(&dx_root->dr_list, 0, osb->sb->s_blocksize - - offsetof(struct ocfs2_dx_root_block, dr_list)); + + dx_root->dr_list.l_tree_depth = 0; dx_root->dr_list.l_count = cpu_to_le16(ocfs2_extent_recs_per_dx_root(osb->sb)); + dx_root->dr_list.l_next_free_rec = 0; + memset(&dx_root->dr_list.l_recs, 0, + osb->sb->s_blocksize - + (offsetof(struct ocfs2_dx_root_block, dr_list) + + offsetof(struct ocfs2_extent_list, l_recs))); /* This should never fail considering we start with an empty * dx_root. */ diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c index d1aa04a5af1b..56be21c695d6 100644 --- a/fs/ocfs2/localalloc.c +++ b/fs/ocfs2/localalloc.c @@ -905,13 +905,11 @@ static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb, static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc) { struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc); - int i; alloc->id1.bitmap1.i_total = 0; alloc->id1.bitmap1.i_used = 0; la->la_bm_off = 0; - for(i = 0; i < le16_to_cpu(la->la_size); i++) - la->la_bitmap[i] = 0; + memset(la->la_bitmap, 0, le16_to_cpu(la->la_size)); } #if 0 diff --git a/fs/ocfs2/move_extents.c b/fs/ocfs2/move_extents.c index 86f2631e6360..ba4952b41602 100644 --- a/fs/ocfs2/move_extents.c +++ b/fs/ocfs2/move_extents.c @@ -98,7 +98,13 @@ static int __ocfs2_move_extent(handle_t *handle, rec = &el->l_recs[index]; - BUG_ON(ext_flags != rec->e_flags); + if (ext_flags != rec->e_flags) { + ret = ocfs2_error(inode->i_sb, + "Inode %llu has corrupted extent %d with flags 0x%x at cpos %u\n", + (unsigned long long)ino, index, rec->e_flags, cpos); + goto out; + } + /* * after moving/defraging to new location, the extent is not going * to be refcounted anymore. @@ -1031,6 +1037,12 @@ int ocfs2_ioctl_move_extents(struct file *filp, void __user *argp) if (range.me_threshold > i_size_read(inode)) range.me_threshold = i_size_read(inode); + if (range.me_flags & ~(OCFS2_MOVE_EXT_FL_AUTO_DEFRAG | + OCFS2_MOVE_EXT_FL_PART_DEFRAG)) { + status = -EINVAL; + goto out_free; + } + if (range.me_flags & OCFS2_MOVE_EXT_FL_AUTO_DEFRAG) { context->auto_defrag = 1; diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h index ae0e44e5f2ad..c501eb3cdcda 100644 --- a/fs/ocfs2/ocfs2_fs.h +++ b/fs/ocfs2/ocfs2_fs.h @@ -468,7 +468,8 @@ struct ocfs2_extent_list { __le16 l_reserved1; __le64 l_reserved2; /* Pad to sizeof(ocfs2_extent_rec) */ -/*10*/ struct ocfs2_extent_rec l_recs[]; /* Extent records */ + /* Extent records */ +/*10*/ struct ocfs2_extent_rec l_recs[] __counted_by_le(l_count); }; /* @@ -482,7 +483,8 @@ struct ocfs2_chain_list { __le16 cl_count; /* Total chains in this list */ __le16 cl_next_free_rec; /* Next unused chain slot */ __le64 cl_reserved1; -/*10*/ struct ocfs2_chain_rec cl_recs[]; /* Chain records */ + /* Chain records */ +/*10*/ struct ocfs2_chain_rec cl_recs[] __counted_by_le(cl_count); }; /* @@ -494,7 +496,8 @@ struct ocfs2_truncate_log { /*00*/ __le16 tl_count; /* Total records in this log */ __le16 tl_used; /* Number of records in use */ __le32 tl_reserved1; -/*08*/ struct ocfs2_truncate_rec tl_recs[]; /* Truncate records */ + /* Truncate records */ +/*08*/ struct ocfs2_truncate_rec tl_recs[] __counted_by_le(tl_count); }; /* @@ -638,7 +641,7 @@ struct ocfs2_local_alloc __le16 la_size; /* Size of included bitmap, in bytes */ __le16 la_reserved1; __le64 la_reserved2; -/*10*/ __u8 la_bitmap[]; +/*10*/ __u8 la_bitmap[] __counted_by_le(la_size); }; /* @@ -651,7 +654,7 @@ struct ocfs2_inline_data * for data, starting at id_data */ __le16 id_reserved0; __le32 id_reserved1; - __u8 id_data[]; /* Start of user data */ + __u8 id_data[] __counted_by_le(id_count); /* Start of user data */ }; /* @@ -796,9 +799,10 @@ struct ocfs2_dx_entry_list { * possible in de_entries */ __le16 de_num_used; /* Current number of * de_entries entries */ - struct ocfs2_dx_entry de_entries[]; /* Indexed dir entries - * in a packed array of - * length de_num_used */ + /* Indexed dir entries in a packed + * array of length de_num_used. + */ + struct ocfs2_dx_entry de_entries[] __counted_by_le(de_count); }; #define OCFS2_DX_FLAG_INLINE 0x01 @@ -934,7 +938,8 @@ struct ocfs2_refcount_list { __le16 rl_used; /* Current number of used records */ __le32 rl_reserved2; __le64 rl_reserved1; /* Pad to sizeof(ocfs2_refcount_record) */ -/*10*/ struct ocfs2_refcount_rec rl_recs[]; /* Refcount records */ + /* Refcount records */ +/*10*/ struct ocfs2_refcount_rec rl_recs[] __counted_by_le(rl_count); }; @@ -1020,7 +1025,8 @@ struct ocfs2_xattr_header { buckets. A block uses xb_check and sets this field to zero.) */ - struct ocfs2_xattr_entry xh_entries[]; /* xattr entry list. */ + /* xattr entry list. */ + struct ocfs2_xattr_entry xh_entries[] __counted_by_le(xh_count); }; /* diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c index 6ac4dcd54588..9969a041ab18 100644 --- a/fs/ocfs2/suballoc.c +++ b/fs/ocfs2/suballoc.c @@ -649,6 +649,16 @@ ocfs2_block_group_alloc_discontig(handle_t *handle, return status ? ERR_PTR(status) : bg_bh; } +static int ocfs2_check_chain_list(struct ocfs2_chain_list *cl, + struct super_block *sb) +{ + if (le16_to_cpu(cl->cl_count) != ocfs2_chain_recs_per_inode(sb)) + return -EINVAL; + if (le16_to_cpu(cl->cl_next_free_rec) > le16_to_cpu(cl->cl_count)) + return -EINVAL; + return 0; +} + /* * We expect the block group allocator to already be locked. */ @@ -671,6 +681,10 @@ static int ocfs2_block_group_alloc(struct ocfs2_super *osb, BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode)); cl = &fe->id2.i_chain; + status = ocfs2_check_chain_list(cl, alloc_inode->i_sb); + if (status) + goto bail; + status = ocfs2_reserve_clusters_with_limit(osb, le16_to_cpu(cl->cl_cpg), max_block, flags, &ac); @@ -1992,6 +2006,9 @@ static int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, } cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; + status = ocfs2_check_chain_list(cl, ac->ac_inode->i_sb); + if (status) + goto bail; victim = ocfs2_find_victim_chain(cl); ac->ac_chain = victim; ^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent 2025-06-01 6:11 [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent syzbot ` (2 preceding siblings ...) 2025-10-22 15:04 ` Forwarded: #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 552c50713f273b494ac6c77052032a49bc9255e2 syzbot @ 2026-01-07 5:41 ` syzbot 3 siblings, 0 replies; 6+ messages in thread From: syzbot @ 2026-01-07 5:41 UTC (permalink / raw) To: akpm, dmantipov, jlbec, joseph.qi, linux-kernel, mark, ocfs2-devel, syzkaller-bugs syzbot suspects this issue was fixed by commit: commit e1c70505ee8158c1108340d9cd67182ade93af4a Author: Dmitry Antipov <dmantipov@yandex.ru> Date: Thu Oct 30 15:30:02 2025 +0000 ocfs2: add extra consistency checks for chain allocator dinodes bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13776f92580000 start commit: be48bcf004f9 Merge tag 'for-6.17-rc2-tag' of git://git.ker.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=fe8fc1adb24b215 dashboard link: https://syzkaller.appspot.com/bug?extid=8882b2f5f48a7170a726 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=152226f0580000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: ocfs2: add extra consistency checks for chain allocator dinodes For information about bisection process see: https://goo.gl/tpsmEJ#bisection ^ permalink raw reply [flat|nested] 6+ messages in thread
[parent not found: <20251022150444.jHFNw%dmantipov@yandex.ru>]
* Re: [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent [not found] <20251022150444.jHFNw%dmantipov@yandex.ru> @ 2025-10-22 15:21 ` syzbot 0 siblings, 0 replies; 6+ messages in thread From: syzbot @ 2025-10-22 15:21 UTC (permalink / raw) To: dmantipov, linux-kernel, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: kernel BUG in ocfs2_remove_extent ------------[ cut here ]------------ kernel BUG at fs/ocfs2/alloc.c:5581! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5971 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:ocfs2_remove_extent+0x2050/0x21a0 fs/ocfs2/alloc.c:5581 Code: f9 ff ff 48 8b 4c 24 08 80 e1 07 fe c1 38 c1 0f 8c 27 fa ff ff 48 8b 7c 24 08 e8 db 38 8a fe e9 18 fa ff ff e8 61 fa 22 fe 90 <0f> 0b f3 0f 1e fa 65 44 8b 3d 06 58 cf 0e bf 07 00 00 00 44 89 fe RSP: 0018:ffffc90002a5e620 EFLAGS: 00010293 RAX: ffffffff839cb81f RBX: 0000000000000007 RCX: ffff888035d2a480 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000007 RBP: ffffc90002a5e970 R08: ffff888035d2a480 R09: 0000000000000006 R10: 00000000fffffffc R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88808d75f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe0a8a6eb4c CR3: 0000000042743000 CR4: 0000000000352ef0 Call Trace: <TASK> ocfs2_remove_btree_range+0xdef/0x1540 fs/ocfs2/alloc.c:5778 ocfs2_commit_truncate+0xba7/0x2250 fs/ocfs2/alloc.c:7373 ocfs2_truncate_for_delete fs/ocfs2/inode.c:699 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:866 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline] ocfs2_evict_inode+0x1138/0x4100 fs/ocfs2/inode.c:1295 evict+0x504/0x9c0 fs/inode.c:810 ocfs2_dentry_iput+0x247/0x370 fs/ocfs2/dcache.c:407 __dentry_kill+0x209/0x660 fs/dcache.c:669 dput+0x19f/0x2b0 fs/dcache.c:911 __fput+0x68e/0xa70 fs/file_table.c:476 task_work_run+0x1d4/0x260 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x6b5/0x2300 kernel/exit.c:966 do_group_exit+0x21c/0x2d0 kernel/exit.c:1107 get_signal+0x1285/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:40 [inline] exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] irqentry_exit_to_user_mode+0x7e/0x110 kernel/entry/common.c:73 exc_page_fault+0xab/0x100 arch/x86/mm/fault.c:1535 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7f95a3d8ebf1 Code: Unable to access opcode bytes at 0x7f95a3d8ebc7. RSP: 002b:00000000fffffeb0 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f95a3fb5fa0 RCX: 00007f95a3d8ebe9 RDX: 0000000000000000 RSI: 00000000fffffeb0 RDI: 0000000002000400 RBP: 00007f95a3e11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f95a3fb6038 R14: 00007f95a3fb5fa0 R15: 00007ffc4e081d38 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_remove_extent+0x2050/0x21a0 fs/ocfs2/alloc.c:5581 Code: f9 ff ff 48 8b 4c 24 08 80 e1 07 fe c1 38 c1 0f 8c 27 fa ff ff 48 8b 7c 24 08 e8 db 38 8a fe e9 18 fa ff ff e8 61 fa 22 fe 90 <0f> 0b f3 0f 1e fa 65 44 8b 3d 06 58 cf 0e bf 07 00 00 00 44 89 fe RSP: 0018:ffffc90002a5e620 EFLAGS: 00010293 RAX: ffffffff839cb81f RBX: 0000000000000007 RCX: ffff888035d2a480 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000007 RBP: ffffc90002a5e970 R08: ffff888035d2a480 R09: 0000000000000006 R10: 00000000fffffffc R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88808d75f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f37f9a6d000 CR3: 000000003623c000 CR4: 0000000000352ef0 Tested on: commit: 552c5071 Merge tag 'vfio-v6.18-rc3' of https://github... git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=16099b04580000 kernel config: https://syzkaller.appspot.com/x/.config?x=cb89820a01e5d251 dashboard link: https://syzkaller.appspot.com/bug?extid=8882b2f5f48a7170a726 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=1116ce7c580000 ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2026-01-07 5:41 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2025-06-01 6:11 [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent syzbot
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2025-08-29 1:50 ` syzbot
2025-10-22 15:04 ` Forwarded: #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 552c50713f273b494ac6c77052032a49bc9255e2 syzbot
2026-01-07 5:41 ` [syzbot] [ocfs2?] kernel BUG in ocfs2_remove_extent syzbot
[not found] <20251022150444.jHFNw%dmantipov@yandex.ru>
2025-10-22 15:21 ` syzbot
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