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Message-ID: <6779978e.050a0220.380ff0.0004.GAE@google.com> Date: Sat, 04 Jan 2025 12:18:22 -0800 From: syzbot <syzbot+ed19b61515c19e78a5af@...kaller.appspotmail.com> To: kent.overstreet@...ux.dev, linux-bcachefs@...r.kernel.org, linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: [syzbot] [bcachefs?] kernel BUG in bch2_quota_transfer Hello, syzbot found the following issue on: HEAD commit: ccb98ccef0e5 Merge tag 'platform-drivers-x86-v6.13-4' of g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17e2c8b0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1c541fa8af5c9cc7 dashboard link: https://syzkaller.appspot.com/bug?extid=ed19b61515c19e78a5af compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-ccb98cce.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/703c842459ce/vmlinux-ccb98cce.xz kernel image: https://storage.googleapis.com/syzbot-assets/1a8db4bb5dbb/bzImage-ccb98cce.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ed19b61515c19e78a5af@...kaller.appspotmail.com inum: 4099:4294967295 mode=100755 flags=(15300000) journal_seq=5 hash_seed=ab878b4c5ab7c89e hash_type=siphash bi_size=1050 bi_sectors=8 bi_version=0 bi_atime=1997793410 bi_ctime=1997793410 bi_mtime=1997793410 bi_otime=1997793410 bi_uid=0 bi_gid=0 bi_nlink=0 bi_generation=0 bi_dev=0 bi_data_checksum=0 bi_compression=0 bi_project=0 bi_background_compression=0 bi_data_replicas=0 bi_promote_target=0 bi_foreground_target=0 bi_background_target=0 bi_erasure_code=0 bi_fields_set=0 bi_dir=4098 bi_dir_offset=2566586984702133180 bi_subvol=0 bi_parent_subvol=0 bi_nocow=0, fixing done bcachefs (loop0): check_dirents... dirent points to missing inode: u64s 8 type dirent 4096:1859603997870691834:U32_MAX len 0 ver 0: lost+found -> 4097 type dir, fixing done bcachefs (loop0): resume_logged_ops... done bcachefs (loop0): delete_dead_inodes... done bcachefs (loop0): set_fs_needs_rebalance... done bcachefs (loop0): reading quotas bcachefs (loop0): quotas done bcachefs (loop0): scanning for old btree nodes: min_version 0.24: unwritten_extents bcachefs (loop0): scanning for old btree nodes done bcachefs (loop0): done starting filesystem netlink: 'syz.0.0': attribute type 10 has an invalid length. netlink: 40 bytes leftover after parsing attributes in process `syz.0.0'. A link change request failed with some changes committed already. Interface virt_wifi0 may have been left with an inconsistent configuration, please check. ------------[ cut here ]------------ kernel BUG at fs/bcachefs/quota.c:319! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5322 Comm: syz.0.0 Not tainted 6.13.0-rc5-syzkaller-00004-gccb98ccef0e5 #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:__bch2_quota_transfer fs/bcachefs/quota.c:319 [inline] RIP: 0010:bch2_quota_transfer+0xaba/0xad0 fs/bcachefs/quota.c:367 Code: 48 c7 c7 f0 4a f6 8e 4c 89 e6 e8 41 2a b1 00 e9 c8 fd ff ff e8 37 db 55 fd 90 0f 0b e8 2f db 55 fd 90 0f 0b e8 27 db 55 fd 90 <0f> 0b e8 1f db 55 fd 90 0f 0b e8 d7 10 7f 07 0f 1f 80 00 00 00 00 RSP: 0018:ffffc9000d4bf640 EFLAGS: 00010287 RAX: ffffffff844998b9 RBX: ffff8880522c80a0 RCX: 0000000000100000 RDX: ffffc9000eac2000 RSI: 0000000000000ad7 RDI: 0000000000000ad8 RBP: ffffc9000d4bf7e8 R08: ffffffff84499589 R09: 0000000000000001 R10: dffffc0000000000 R11: fffffbfff2032fcf R12: 0000000000000001 R13: 0000000000000000 R14: 1ffff1100a3a1685 R15: ffff888051d0b428 FS: 00007f307cbc16c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020006140 CR3: 0000000040468000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> bch2_fs_quota_transfer+0x282/0x4d0 fs/bcachefs/fs.c:140 bch2_setattr_nonsize+0x3c2/0x12a0 fs/bcachefs/fs.c:1044 notify_change+0xbca/0xe90 fs/attr.c:552 chown_common+0x501/0x850 fs/open.c:778 do_fchownat+0x16a/0x240 fs/open.c:809 __do_sys_lchown fs/open.c:834 [inline] __se_sys_lchown fs/open.c:832 [inline] __x64_sys_lchown+0x85/0xa0 fs/open.c:832 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: 0033:0x7f307bd85d29 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:00007f307cbc1038 EFLAGS: 00000246 ORIG_RAX: 000000000000005e RAX: ffffffffffffffda RBX: 00007f307bf75fa0 RCX: 00007f307bd85d29 RDX: 0000000039323420 RSI: 00000000706d6174 RDI: 0000000020000200 RBP: 00007f307be01b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f307bf75fa0 R15: 00007ffdf9b434c8 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__bch2_quota_transfer fs/bcachefs/quota.c:319 [inline] RIP: 0010:bch2_quota_transfer+0xaba/0xad0 fs/bcachefs/quota.c:367 Code: 48 c7 c7 f0 4a f6 8e 4c 89 e6 e8 41 2a b1 00 e9 c8 fd ff ff e8 37 db 55 fd 90 0f 0b e8 2f db 55 fd 90 0f 0b e8 27 db 55 fd 90 <0f> 0b e8 1f db 55 fd 90 0f 0b e8 d7 10 7f 07 0f 1f 80 00 00 00 00 RSP: 0018:ffffc9000d4bf640 EFLAGS: 00010287 RAX: ffffffff844998b9 RBX: ffff8880522c80a0 RCX: 0000000000100000 RDX: ffffc9000eac2000 RSI: 0000000000000ad7 RDI: 0000000000000ad8 RBP: ffffc9000d4bf7e8 R08: ffffffff84499589 R09: 0000000000000001 R10: dffffc0000000000 R11: fffffbfff2032fcf R12: 0000000000000001 R13: 0000000000000000 R14: 1ffff1100a3a1685 R15: ffff888051d0b428 FS: 00007f307cbc16c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020006140 CR3: 0000000040468000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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@...glegroups.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 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
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