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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: dbf8fe85a16a Merge tag 'net-6.19-rc4' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16b19792580000 kernel config: https://syzkaller.appspot.com/x/.config?x=513255d80ab78f2b dashboard link: https://syzkaller.appspot.com/bug?extid=44c564a3cb08605f34a1 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10ef2422580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11b19792580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-dbf8fe85.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/86d0a4a4173a/vmlinux-dbf8fe85.xz kernel image: https://storage.googleapis.com/syzbot-assets/23bd847a572d/bzImage-dbf8fe85.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/97470b986566/mount_0.gz fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=1047329a580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+44c564a3cb08605f34a1@syzkaller.appspotmail.com ======================================================= JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ------------[ cut here ]------------ kernel BUG at fs/ocfs2/suballoc.c:1611! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5527 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_block_group_search+0x367/0x490 fs/ocfs2/suballoc.c:1611 Code: d9 80 e1 07 80 c1 03 38 c1 0f 8c c5 fe ff ff 48 89 df e8 0c 40 77 fe e9 b8 fe ff ff e8 92 95 0f fe 90 0f 0b e8 8a 95 0f fe 90 <0f> 0b f3 0f 1e fa 65 44 8b 3d 4f 2e cf 0e bf 07 00 00 00 44 89 fe RSP: 0018:ffffc90002616bb8 EFLAGS: 00010293 RAX: ffffffff83b171d6 RBX: 000000000000004a RCX: ffff888000b70000 RDX: 0000000000000000 RSI: 000000000000004a RDI: 000000000000004a RBP: 0000000000000001 R08: 00000000ffffffff R09: ffffc900026171a0 R10: dffffc0000000000 R11: ffffffff83b16e70 R12: ffff8880470b0740 R13: ffff88804453c740 R14: ffff8880230d7000 R15: 000000000000004a FS: 000055556aa08500(0000) GS:ffff88808d416000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbdcf97f000 CR3: 00000000113be000 CR4: 0000000000352ef0 Call Trace: ocfs2_search_chain+0x5f3/0x1d60 fs/ocfs2/suballoc.c:1836 ocfs2_claim_suballoc_bits+0xc1e/0x1f60 fs/ocfs2/suballoc.c:2011 ocfs2_claim_new_inode+0x332/0x7a0 fs/ocfs2/suballoc.c:2303 ocfs2_mknod_locked+0x100/0x250 fs/ocfs2/namei.c:638 ocfs2_mknod+0x10a5/0x2030 fs/ocfs2/namei.c:385 ocfs2_create+0x195/0x420 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4440 [inline] open_last_lookups fs/namei.c:4540 [inline] path_openat+0x18bb/0x3dd0 fs/namei.c:4784 do_filp_open+0x1fa/0x410 fs/namei.c:4814 do_sys_openat2+0x121/0x200 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe1e2d8f7c9 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:00007fff02afc7a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fe1e2fe5fa0 RCX: 00007fe1e2d8f7c9 RDX: 000000000000275a RSI: 0000200000000040 RDI: ffffffffffffff9c RBP: 00007fe1e2e13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe1e2fe5fa0 R14: 00007fe1e2fe5fa0 R15: 0000000000000004 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_block_group_search+0x367/0x490 fs/ocfs2/suballoc.c:1611 Code: d9 80 e1 07 80 c1 03 38 c1 0f 8c c5 fe ff ff 48 89 df e8 0c 40 77 fe e9 b8 fe ff ff e8 92 95 0f fe 90 0f 0b e8 8a 95 0f fe 90 <0f> 0b f3 0f 1e fa 65 44 8b 3d 4f 2e cf 0e bf 07 00 00 00 44 89 fe RSP: 0018:ffffc90002616bb8 EFLAGS: 00010293 RAX: ffffffff83b171d6 RBX: 000000000000004a RCX: ffff888000b70000 RDX: 0000000000000000 RSI: 000000000000004a RDI: 000000000000004a RBP: 0000000000000001 R08: 00000000ffffffff R09: ffffc900026171a0 R10: dffffc0000000000 R11: ffffffff83b16e70 R12: ffff8880470b0740 R13: ffff88804453c740 R14: ffff8880230d7000 R15: 000000000000004a FS: 000055556aa08500(0000) GS:ffff88808d416000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd8f777e286 CR3: 00000000113be000 CR4: 0000000000352ef0 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title 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. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup