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Message-ID: <67bdfb21.050a0220.bbfd1.00ac.GAE@google.com> Date: Tue, 25 Feb 2025 09:17:21 -0800 From: syzbot <syzbot+b93b65ee321c97861072@...kaller.appspotmail.com> To: jlbec@...lplan.org, joseph.qi@...ux.alibaba.com, linux-kernel@...r.kernel.org, mark@...heh.com, ocfs2-devel@...ts.linux.dev, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] [ocfs2?] kernel BUG in ocfs2_truncate_file syzbot has found a reproducer for the following issue on: HEAD commit: d082ecbc71e9 Linux 6.14-rc4 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14b126e4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5b4c41bdaeea1964 dashboard link: https://syzkaller.appspot.com/bug?extid=b93b65ee321c97861072 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=166f77f8580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12b126e4580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-d082ecbc.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c5299c562b1f/vmlinux-d082ecbc.xz kernel image: https://storage.googleapis.com/syzbot-assets/c0bed38fa342/bzImage-d082ecbc.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/30f6f2b1247c/mount_0.gz fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=10b126e4580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b93b65ee321c97861072@...kaller.appspotmail.com (syz-executor151,5310,0):ocfs2_truncate_file:460 ERROR: bug expression: le64_to_cpu(fe->i_size) != i_size_read(inode) (syz-executor151,5310,0):ocfs2_truncate_file:460 ERROR: Inode 17058, inode i_size = 0 != di i_size = 281481419161600, i_flags = 0x67bd ------------[ cut here ]------------ kernel BUG at fs/ocfs2/file.c:460! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5310 Comm: syz-executor151 Not tainted 6.14.0-rc4-syzkaller #0 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_truncate_file+0x139f/0x1560 fs/ocfs2/file.c:454 Code: 40 01 00 00 48 c7 c6 46 0d 35 8e ba cc 01 00 00 48 c7 c1 c0 69 69 8c 4d 89 e8 4d 89 f9 50 41 56 e8 d6 96 19 00 48 83 c4 10 90 <0f> 0b e8 4a f1 4b 08 f3 0f 1e fa 65 44 8b 35 aa 7a 47 7c bf 07 00 RSP: 0018:ffffc9000d257280 EFLAGS: 00010282 RAX: 5796f80f25df1300 RBX: ffff888048ec542c RCX: 5796f80f25df1300 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc9000d2574b0 R08: ffffffff81a113fc R09: 1ffff92001a4adbc R10: dffffc0000000000 R11: fffff52001a4adbd R12: 1ffff110091d8a84 R13: 00000000000042a2 R14: 0001000180000000 R15: 0000000000000000 FS: 000055558b494380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056519020e6c0 CR3: 0000000043316000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ocfs2_setattr+0x1890/0x1ef0 fs/ocfs2/file.c:1212 notify_change+0xbca/0xe90 fs/attr.c:552 do_truncate+0x220/0x310 fs/open.c:65 handle_truncate fs/namei.c:3451 [inline] do_open fs/namei.c:3834 [inline] path_openat+0x2e1b/0x3590 fs/namei.c:3989 do_filp_open+0x27f/0x4e0 fs/namei.c:4016 do_sys_openat2+0x13e/0x1d0 fs/open.c:1428 do_sys_open fs/open.c:1443 [inline] __do_sys_openat fs/open.c:1459 [inline] __se_sys_openat fs/open.c:1454 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1454 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: 0033:0x7ff7d0f62e59 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:00007ffce7922bd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff7d0f62e59 RDX: 000000000000275a RSI: 0000400000000040 RDI: 00000000ffffff9c RBP: 0000400000000040 R08: 000055558b4954c0 R09: 000055558b4954c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffce7922c00 R13: 0000400000004500 R14: 00007ffce7922c00 R15: 00007ff7d0fac03b </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_truncate_file+0x139f/0x1560 fs/ocfs2/file.c:454 Code: 40 01 00 00 48 c7 c6 46 0d 35 8e ba cc 01 00 00 48 c7 c1 c0 69 69 8c 4d 89 e8 4d 89 f9 50 41 56 e8 d6 96 19 00 48 83 c4 10 90 <0f> 0b e8 4a f1 4b 08 f3 0f 1e fa 65 44 8b 35 aa 7a 47 7c bf 07 00 RSP: 0018:ffffc9000d257280 EFLAGS: 00010282 RAX: 5796f80f25df1300 RBX: ffff888048ec542c RCX: 5796f80f25df1300 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc9000d2574b0 R08: ffffffff81a113fc R09: 1ffff92001a4adbc R10: dffffc0000000000 R11: fffff52001a4adbd R12: 1ffff110091d8a84 R13: 00000000000042a2 R14: 0001000180000000 R15: 0000000000000000 FS: 000055558b494380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056519020e6c0 CR3: 0000000043316000 CR4: 0000000000352ef0 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.
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