[PATCH] bcachefs: Fix potential sleeping during mount
From: Daniel J Blueman
Date: Sat Nov 11 2023 - 19:39:31 EST
During mount, bcachefs mount option processing may sleep while allocating a string buffer.
Fix this by reference counting in order to take the atomic path.
Signed-off-by: Daniel J Blueman <daniel@xxxxxxxxx>
---
fs/bcachefs/disk_groups.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/bcachefs/disk_groups.c b/fs/bcachefs/disk_groups.c
index 1f334124055b..4d0cb0ccff32 100644
--- a/fs/bcachefs/disk_groups.c
+++ b/fs/bcachefs/disk_groups.c
@@ -555,6 +555,7 @@ void bch2_target_to_text(struct printbuf *out, struct bch_fs *c, unsigned v)
case TARGET_DEV: {
struct bch_dev *ca;
+ out->atomic++;
rcu_read_lock();
ca = t.dev < c->sb.nr_devices
? rcu_dereference(c->devs[t.dev])
@@ -570,6 +571,7 @@ void bch2_target_to_text(struct printbuf *out, struct bch_fs *c, unsigned v)
}
rcu_read_unlock();
+ out->atomic--;
break;
}
case TARGET_GROUP:
--
2.40.1