syzbot


WARNING in __btrfs_free_extent

Status: upstream: reported C repro on 2022/11/02 22:30
Reported-by: syzbot+560e6a32d484d7293e37@syzkaller.appspotmail.com
First crash: 33d, last: 12h44m

Cause bisection: failed (bisect log)

Sample crash report:
BTRFS info (device loop0): balance: start -d -m -s
BTRFS info (device loop0): relocating block group 6881280 flags data|metadata
BTRFS info (device loop0): relocating block group 5242880 flags data|metadata
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3665 at fs/btrfs/extent-tree.c:3058 __btrfs_free_extent+0x2021/0x2870 fs/btrfs/extent-tree.c:3053
Modules linked in:
CPU: 0 PID: 3665 Comm: syz-executor395 Not tainted 6.1.0-rc7-syzkaller-00123-ga4412fdd49dc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:__btrfs_free_extent+0x2021/0x2870 fs/btrfs/extent-tree.c:3058
Code: e8 36 7b 0d 07 e9 36 f6 ff ff e8 3a c0 07 fe 45 31 ed 45 0f b6 c5 48 89 df 48 c7 c6 20 6b 38 8b ba ed 0b 00 00 e9 58 e7 ff ff <0f> 0b 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 07 dc
RSP: 0018:ffffc90003c9ef80 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000107 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff8d649770 RDI: 00000000fffffffe
RBP: ffffc90003c9f100 R08: 0000000000000005 R09: ffffffff8382badf
R10: 0000000000000002 R11: ffff8880770b8000 R12: dffffc0000000000
R13: dffffc0000000000 R14: 00000000fffffffe R15: ffff8880774c0c60
FS:  00007f54db09b700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005649822fb0e8 CR3: 0000000079d83000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_run_delayed_refs_for_head+0xafd/0x1df0 fs/btrfs/extent-tree.c:1943
 __btrfs_run_delayed_refs+0x25f/0x490 fs/btrfs/extent-tree.c:2008
 btrfs_run_delayed_refs+0x13b/0x490 fs/btrfs/extent-tree.c:2139
 btrfs_commit_transaction+0x3a9/0x3760 fs/btrfs/transaction.c:2123
 prepare_to_relocate+0x3a8/0x4b0 fs/btrfs/relocation.c:3571
 relocate_block_group+0x15d/0xce0 fs/btrfs/relocation.c:3596
 btrfs_relocate_block_group+0x7b8/0xd70 fs/btrfs/relocation.c:4059
 btrfs_relocate_chunk+0x125/0x350 fs/btrfs/volumes.c:3260
 __btrfs_balance+0x1dbf/0x2960 fs/btrfs/volumes.c:3990
 btrfs_balance+0xbfc/0x1140 fs/btrfs/volumes.c:4373
 btrfs_ioctl_balance+0x478/0x780 fs/btrfs/ioctl.c:4484
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f54db110b49
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 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:00007f54db09b2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f54db19b7f0 RCX: 00007f54db110b49
RDX: 0000000020022300 RSI: 00000000c4009420 RDI: 0000000000000008
RBP: 00007f54db16826c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 00007f54db167270 R14: 61635f7261656c63 R15: 00007f54db19b7f8
 </TASK>

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-fs 2022/12/03 03:13 upstream a4412fdd49dc e080de16 .config log report syz C WARNING in __btrfs_free_extent
ci2-upstream-fs 2022/10/31 03:49 upstream b229b6ca5abb 2a71366b .config log report syz C WARNING in __btrfs_free_extent
ci2-upstream-fs 2022/10/31 03:26 upstream b229b6ca5abb 2a71366b .config log report info WARNING in __btrfs_free_extent
* Struck through repros no longer work on HEAD.