Hello, syzbot found the following issue on: HEAD commit: 643e2e259c2b Merge tag 'for-6.13-rc6-tag' of git://git.ker.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1719a218580000 kernel config: https://syzkaller.appspot.com/x/.config?x=7ac4cd61d548c1ef dashboard link: https://syzkaller.appspot.com/bug?extid=158be45e4d99232e1900 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=132021df980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1530cf0f980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/76410f8b1345/disk-643e2e25.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1ee033602aec/vmlinux-643e2e25.xz kernel image: https://storage.googleapis.com/syzbot-assets/b8062c57eaa0/bzImage-643e2e25.xz mounted in repro #1: https://storage.googleapis.com/syzbot-assets/ca71c75d50c5/mount_0.gz mounted in repro #2: https://storage.googleapis.com/syzbot-assets/f6a710039269/mount_4.gz Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=140b4cb0580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=160b4cb0580000 console output: https://syzkaller.appspot.com/x/log.txt?x=120b4cb0580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+158be45e4d99232e1900@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6214 at fs/nilfs2/btree.c:2301 nilfs_btree_assign+0xabb/0xd20 fs/nilfs2/btree.c:2301 Modules linked in: CPU: 0 UID: 0 PID: 6214 Comm: segctord Not tainted 6.13.0-rc6-syzkaller-00059-g643e2e259c2b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:nilfs_btree_assign+0xabb/0xd20 fs/nilfs2/btree.c:2301 Code: 00 00 44 89 f0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 e2 52 24 fe 4c 8b 7c 24 38 eb a2 e8 d6 52 24 fe 90 <0f> 0b 90 41 be fe ff ff ff eb 91 44 89 f1 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc90004bcf600 EFLAGS: 00010293 RAX: ffffffff837b20fa RBX: ffff8880758fa658 RCX: ffff888027200000 RDX: 0000000000000000 RSI: 00000000fffffffe RDI: 00000000fffffffe RBP: ffffc90004bcf730 R08: ffffffff837b1a3b R09: 0000000000000000 R10: ffffc90004bcf560 R11: fffff52000979eaf R12: dffffc0000000000 R13: ffff8880330ca580 R14: 00000000fffffffe R15: 1ffff92000979ed0 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020094000 CR3: 0000000030296000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> nilfs_bmap_assign+0x8f/0x160 fs/nilfs2/bmap.c:390 nilfs_segctor_update_payload_blocknr fs/nilfs2/segment.c:1633 [inline] nilfs_segctor_assign fs/nilfs2/segment.c:1667 [inline] nilfs_segctor_do_construct+0x35c5/0x6ea0 fs/nilfs2/segment.c:2126 nilfs_segctor_construct+0x181/0x6b0 fs/nilfs2/segment.c:2479 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2587 [inline] nilfs_segctor_thread+0x69e/0xe80 fs/nilfs2/segment.c:2701 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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
