syzbot

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btree trans held srcu lock (delaying memory reclaim) for 26 seconds
WARNING: CPU: 1 PID: 5655 at fs/bcachefs/btree_iter.c:3002 check_srcu_held_too_long fs/bcachefs/btree_iter.c:3000 [inline]
WARNING: CPU: 1 PID: 5655 at fs/bcachefs/btree_iter.c:3002 bch2_trans_put+0xc92/0xe40 fs/bcachefs/btree_iter.c:3246
Modules linked in:
CPU: 1 UID: 0 PID: 5655 Comm: syz.5.90 Not tainted 6.11.0-syzkaller-02520-gadfc3ded5c33 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:check_srcu_held_too_long fs/bcachefs/btree_iter.c:3000 [inline]
RIP: 0010:bch2_trans_put+0xc92/0xe40 fs/bcachefs/btree_iter.c:3246
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 40 24 52 8c 48 89 d6 e8 0f 49 40 fd 90 <0f> 0b 90 90 e9 f8 f8 ff ff e8 d0 28 7e fd 90 0f 0b 90 e9 32 f9 ff
RSP: 0018:ffffc90008fbf348 EFLAGS: 00010246
RAX: 9f6cdd6c3ad81c00 RBX: 0000000000000290 RCX: 0000000000040000
RDX: ffffc9000a2f6000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 00000000ffffc941 R08: ffffffff8155c962 R09: 1ffff1101712519a
R10: dffffc0000000000 R11: ffffed101712519b R12: ffff888031aec070
R13: dffffc0000000000 R14: ffff888031aec042 R15: 1ffff1100635d808
FS:  00007f7906f6b6c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbebd63b000 CR3: 0000000022b30000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 bch2_btree_root_read+0x8ba/0x980 fs/bcachefs/btree_io.c:1773
 read_btree_roots+0x296/0x840 fs/bcachefs/recovery.c:523
 bch2_fs_recovery+0x24ac/0x38b0 fs/bcachefs/recovery.c:851
 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1036
 bch2_fs_get_tree+0xd61/0x1700 fs/bcachefs/fs.c:1956
 vfs_get_tree+0x92/0x2b0 fs/super.c:1800
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032
 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: 0033:0x7f790617f69a
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:00007f7906f6ae68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f7906f6aef0 RCX: 00007f790617f69a
RDX: 0000000020005d80 RSI: 0000000020005dc0 RDI: 00007f7906f6aeb0
RBP: 0000000020005d80 R08: 00007f7906f6aef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020005dc0
R13: 00007f7906f6aeb0 R14: 0000000000005d7d R15: 0000000020000280
 </TASK>