On Mon, Jul 31, 2023 at 8:26 AM Qu Wenruo <quwenruo.btrfs@xxxxxxx> wrote: > > > > On 2023/7/31 13:11, Qu Wenruo wrote: > > > > > > On 2023/7/31 01:07, syzbot wrote: > >> syzbot has found a reproducer for the following issue on: > >> > >> HEAD commit: d31e3792919e Merge tag '6.5-rc3-smb3-client-fixes' of > >> git:.. > >> git tree: upstream > >> console output: https://syzkaller.appspot.com/x/log.txt?x=17afd745a80000 > >> kernel config: > >> https://syzkaller.appspot.com/x/.config?x=9d670a4f6850b6f4 > >> dashboard link: > >> https://syzkaller.appspot.com/bug?extid=ae97a827ae1c3336bbb4 > >> compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils > >> for Debian) 2.40 > >> syz repro: > >> https://syzkaller.appspot.com/x/repro.syz?x=15278939a80000 > >> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14dd3f31a80000 > >> > >> Downloadable assets: > >> disk image (non-bootable): > >> https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-d31e3792.raw.xz > >> vmlinux: > >> https://storage.googleapis.com/syzbot-assets/c6c2342933c9/vmlinux-d31e3792.xz > >> kernel image: > >> https://storage.googleapis.com/syzbot-assets/42df60b42886/bzImage-d31e3792.xz > >> mounted in repro: > >> https://storage.googleapis.com/syzbot-assets/78ffd1ddff6c/mount_0.gz > >> > >> IMPORTANT: if you fix the issue, please add the following tag to the > >> commit: > >> Reported-by: syzbot+ae97a827ae1c3336bbb4@xxxxxxxxxxxxxxxxxxxxxxxxx > >> > >> BTRFS info (device loop1): relocating block group 5242880 flags > >> data|metadata > >> assertion failed: root->reloc_root == reloc_root, in > >> fs/btrfs/relocation.c:1919 > >> ------------[ cut here ]------------ > >> kernel BUG at fs/btrfs/relocation.c:1919! > >> invalid opcode: 0000 [#1] PREEMPT SMP KASAN > >> CPU: 0 PID: 12638 Comm: syz-executor311 Not tainted > >> 6.5.0-rc3-syzkaller-00297-gd31e3792919e #0 > >> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS > >> 1.16.2-debian-1.16.2-1 04/01/2014 > >> RIP: 0010:prepare_to_merge+0x9cc/0xcd0 fs/btrfs/relocation.c:1919 > >> Code: c5 e9 81 fd ff ff e8 e3 59 00 fe b9 7f 07 00 00 48 c7 c2 40 d9 > >> b6 8a 48 c7 c6 20 e6 b6 8a 48 c7 c7 a0 da b6 8a e8 54 bc e3 fd <0f> 0b > >> 4c 8b 7c 24 38 48 8b 5c 24 10 44 8b 6c 24 0c e8 ae 59 00 fe > >> RSP: 0018:ffffc90023e176d0 EFLAGS: 00010282 > >> RAX: 000000000000004f RBX: ffff88801e898560 RCX: 0000000000000000 > >> RDX: 0000000000000000 RSI: ffffffff81698120 RDI: 0000000000000005 > >> RBP: ffff88801e898558 R08: 0000000000000005 R09: 0000000000000000 > >> R10: 0000000080000000 R11: 6f69747265737361 R12: dffffc0000000000 > >> R13: ffff88801e898000 R14: ffff88802d944000 R15: ffff888017616618 > >> FS: 00007fb31aba26c0(0000) GS:ffff88806b600000(0000) > >> knlGS:0000000000000000 > >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > >> CR2: 00007fb31ac3a758 CR3: 000000002e1dc000 CR4: 0000000000350ef0 > >> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > >> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > >> Call Trace: > >> <TASK> > >> relocate_block_group+0x8d1/0xe70 fs/btrfs/relocation.c:3749 > >> btrfs_relocate_block_group+0x714/0xd90 fs/btrfs/relocation.c:4087 > >> btrfs_relocate_chunk+0x143/0x440 fs/btrfs/volumes.c:3283 > >> __btrfs_balance fs/btrfs/volumes.c:4018 [inline] > >> btrfs_balance+0x20fc/0x3ef0 fs/btrfs/volumes.c:4395 > >> btrfs_ioctl_balance fs/btrfs/ioctl.c:3604 [inline] > >> btrfs_ioctl+0x1362/0x5cf0 fs/btrfs/ioctl.c:4637 > >> vfs_ioctl fs/ioctl.c:51 [inline] > >> __do_sys_ioctl fs/ioctl.c:870 [inline] > >> __se_sys_ioctl fs/ioctl.c:856 [inline] > >> __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:856 > >> do_syscall_x64 arch/x86/entry/common.c:50 [inline] > >> do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 > >> entry_SYSCALL_64_after_hwframe+0x63/0xcd > >> RIP: 0033:0x7fb31abe6e49 > >> Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 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 b0 ff ff ff f7 d8 64 89 01 48 > >> RSP: 002b:00007fb31aba2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > >> RAX: ffffffffffffffda RBX: 00007fb31ac73728 RCX: 00007fb31abe6e49 > >> RDX: 00000000200003c0 RSI: 00000000c4009420 RDI: 0000000000000005 > >> RBP: 00007fb31ac73720 R08: 00007fb31aba26c0 R09: 0000000000000000 > >> R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb31ac7372c > >> R13: 0000000000000006 R14: 00007ffe768d5660 R15: 00007ffe768d5748 > >> </TASK> > >> Modules linked in: > >> ---[ end trace 0000000000000000 ]--- > >> RIP: 0010:prepare_to_merge+0x9cc/0xcd0 fs/btrfs/relocation.c:1919 > >> Code: c5 e9 81 fd ff ff e8 e3 59 00 fe b9 7f 07 00 00 48 c7 c2 40 d9 > >> b6 8a 48 c7 c6 20 e6 b6 8a 48 c7 c7 a0 da b6 8a e8 54 bc e3 fd <0f> 0b > >> 4c 8b 7c 24 38 48 8b 5c 24 10 44 8b 6c 24 0c e8 ae 59 00 fe > >> RSP: 0018:ffffc90023e176d0 EFLAGS: 00010282 > >> RAX: 000000000000004f RBX: ffff88801e898560 RCX: 0000000000000000 > >> RDX: 0000000000000000 RSI: ffffffff81698120 RDI: 0000000000000005 > >> RBP: ffff88801e898558 R08: 0000000000000005 R09: 0000000000000000 > >> R10: 0000000080000000 R11: 6f69747265737361 R12: dffffc0000000000 > >> R13: ffff88801e898000 R14: ffff88802d944000 R15: ffff888017616618 > >> FS: 00007fb31aba26c0(0000) GS:ffff88806b600000(0000) > >> knlGS:0000000000000000 > >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > >> CR2: 00007fb31ac3a758 CR3: 000000002e1dc000 CR4: 0000000000350ef0 > >> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > >> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > >> > > > > I failed to reproduce it locally, although it's on David's misc-next. > > > > # syz test: git://github.com/kdave/btrfs-devel.git misc-next > > # syz test: git://github.com/adam900710/linux.git graceful_reloc_mismatch #syz test: https://github.com/adam900710/linux graceful_reloc_mismatch > > > > Thanks, > > Qu > >> > >> --- > >> 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. >
