------------[ cut here ]------------ WARNING: CPU: 1 PID: 7829 at fs/nilfs2/btree.c:2283 nilfs_btree_assign+0xab6/0xd20 Modules linked in: CPU: 1 PID: 7829 Comm: segctord Not tainted 6.4.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 RIP: 0010:nilfs_btree_assign+0xab6/0xd20 fs/nilfs2/btree.c:2283 Code: 00 0f 85 7e 02 00 00 44 89 f0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 f6 62 3e fe 4c 8b 7c 24 38 eb a6 e8 ea 62 3e fe <0f> 0b 41 be fe ff ff ff eb 97 44 89 f1 80 e1 07 80 c1 03 38 c1 0f RSP: 0018:ffffc900048af580 EFLAGS: 00010293 RAX: ffffffff834d0456 RBX: ffff88806c79b358 RCX: ffff888025a23b80 RDX: 0000000000000000 RSI: 00000000fffffffe RDI: 00000000fffffffe RBP: ffffc900048af6b0 R08: ffffffff834cfd9b R09: ffffed100cea6706 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff88802b183c00 R14: 00000000fffffffe R15: 1ffff92000915ec0 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff50a937718 CR3: 000000007b40b000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nilfs_bmap_assign+0x8b/0x160 fs/nilfs2/bmap.c:390 nilfs_segctor_update_payload_blocknr fs/nilfs2/segment.c:1617 [inline] nilfs_segctor_assign fs/nilfs2/segment.c:1651 [inline] nilfs_segctor_do_construct+0x37aa/0x6d30 fs/nilfs2/segment.c:2081 nilfs_segctor_construct+0x145/0x8c0 fs/nilfs2/segment.c:2404 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2512 [inline] nilfs_segctor_thread+0x53a/0x1140 fs/nilfs2/segment.c:2595 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308