syzbot has found a reproducer for the following issue on: HEAD commit: 8a28a0b6f1a1 Merge tag 'net-6.4-rc8' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1391b0e0a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=2cbd298d0aff1140 dashboard link: https://syzkaller.appspot.com/bug?extid=07a7e6273e07bda9ef8b compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16243fdb280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1200bc77280000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d02009a9822d/disk-8a28a0b6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f33ad4ef1182/vmlinux-8a28a0b6.xz kernel image: https://storage.googleapis.com/syzbot-assets/f795a8ae7a8c/bzImage-8a28a0b6.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/ed54a18fab29/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+07a7e6273e07bda9ef8b@xxxxxxxxxxxxxxxxxxxxxxxxx BTRFS info (device loop0): balance: start -d -m BTRFS info (device loop0): relocating block group 6881280 flags data|metadata ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5709 at fs/btrfs/relocation.c:4123 btrfs_relocate_block_group+0xaaa/0xe50 fs/btrfs/relocation.c:4123 Modules linked in: CPU: 0 PID: 5709 Comm: syz-executor272 Not tainted 6.4.0-rc7-syzkaller-00194-g8a28a0b6f1a1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:btrfs_relocate_block_group+0xaaa/0xe50 fs/btrfs/relocation.c:4123 Code: 4c 89 ef e8 c8 38 59 fe e9 5d fe ff ff e8 5e 6b 06 fe 4c 89 f7 41 bc e6 ff ff ff e8 80 e4 0b 00 e9 11 f8 ff ff e8 46 6b 06 fe <0f> 0b e9 d7 fe ff ff e8 3a 6b 06 fe 0f 0b e9 90 fe ff ff e8 2e 6b RSP: 0018:ffffc90005df7968 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000190000 RCX: 0000000000000000 RDX: ffff88807dfc5940 RSI: ffffffff837dde1a RDI: 0000000000000007 RBP: ffff888023904000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000190000 R11: 0000000000094001 R12: 0000000000000000 R13: ffff888015bd0000 R14: ffff88802cb88000 R15: ffff88802cb88000 FS: 00007fbbd1de1700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd3bb0ed028 CR3: 0000000016f19000 CR4: 0000000000350ef0 Call Trace: <TASK> btrfs_relocate_chunk+0x14a/0x440 fs/btrfs/volumes.c:3276 __btrfs_balance fs/btrfs/volumes.c:4011 [inline] btrfs_balance+0x1e8f/0x40f0 fs/btrfs/volumes.c:4395 btrfs_ioctl_balance fs/btrfs/ioctl.c:3599 [inline] btrfs_ioctl+0x12a6/0x5b30 fs/btrfs/ioctl.c:4632 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+0x197/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fbbd92586f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 15 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbbd1de12f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fbbd92e37f0 RCX: 00007fbbd92586f9 RDX: 00000000200003c0 RSI: 00000000c4009420 RDI: 0000000000000005 RBP: 00007fbbd92af4cc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e R13: 61635f7261656c63 R14: 0100000000008001 R15: 00007fbbd92e37f8 </TASK> --- 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.
