bcachefs (loop7): flagging btree alloc lost data
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btree trans held srcu lock (delaying memory reclaim) for 37 seconds
WARNING: CPU: 0 PID: 7808 at fs/bcachefs/btree_iter.c:3030 check_srcu_held_too_long fs/bcachefs/btree_iter.c:3028 [inline]
WARNING: CPU: 0 PID: 7808 at fs/bcachefs/btree_iter.c:3030 bch2_trans_put+0xd42/0xf00 fs/bcachefs/btree_iter.c:3274
Modules linked in:
CPU: 0 UID: 0 PID: 7808 Comm: syz.7.491 Not tainted 6.12.0-rc6-syzkaller-00005-g557329bcecc2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:check_srcu_held_too_long fs/bcachefs/btree_iter.c:3028 [inline]
RIP: 0010:bch2_trans_put+0xd42/0xf00 fs/bcachefs/btree_iter.c:3274
Code: 1c 24 48 c1 eb 02 48 b9 c3 f5 28 5c 8f c2 f5 28 48 89 d8 48 f7 e1 48 c1 ea 02 48 c7 c7 e0 6a 52 8c 48 89 d6 e8 5f 37 3a fd 90 <0f> 0b 90 90 e9 b2 f8 ff ff e8 30 41 79 fd 90 0f 0b 90 e9 f5 f8 ff
RSP: 0018:ffffc90002ebf300 EFLAGS: 00010246
RAX: fc3407479b185a00 RBX: 00000000000003b0 RCX: ffff888026c00000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff8155d312 R09: 0000000000200000
R10: 000000000000ffff R11: ffffed10170c519b R12: ffff88807c9a4070
R13: 1ffff1100f93480e R14: ffff88807c9a4042 R15: 1ffff1100f934808
FS:  00007f383fb016c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe13872c98 CR3: 0000000034ff6000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 bch2_btree_root_read+0x6d6/0x7a0 fs/bcachefs/btree_io.c:1775
 read_btree_roots+0x296/0x840 fs/bcachefs/recovery.c:523
 bch2_fs_recovery+0x2585/0x39c0 fs/bcachefs/recovery.c:853
 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1036
 bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2170
 vfs_get_tree+0x92/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
 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: 0033:0x7f383ed7feba
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f383fb00e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f383fb00ef0 RCX: 00007f383ed7feba
RDX: 0000000020000240 RSI: 0000000020005dc0 RDI: 00007f383fb00eb0
RBP: 0000000020000240 R08: 00007f383fb00ef0 R09: 0000000002010408
R10: 0000000002010408 R11: 0000000000000246 R12: 0000000020005dc0
R13: 00007f383fb00eb0 R14: 0000000000005e19 R15: 0000000020002780
 </TASK>