From: dheart <dheart_joe@163.com>
Date: Fri, 27 Mar 2026 03:31:30 +0000 (+0800)
Subject: BlueFS: _flush_and_sync_log_jump_D should validate that log.writer->pos <= jump_to... 
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=9dfbc4c9c5059581da948a919a9f520aa8ae7df8;p=ceph.git

BlueFS: _flush_and_sync_log_jump_D should validate that log.writer->pos <= jump_to to avoid potential log overwrites.

Signed-off-by: dheart <dheart_joe@163.com>
---

diff --git a/src/os/bluestore/BlueFS.cc b/src/os/bluestore/BlueFS.cc
index 9ee05b177b12..1986f67fa292 100644
--- a/src/os/bluestore/BlueFS.cc
+++ b/src/os/bluestore/BlueFS.cc
@@ -3796,6 +3796,7 @@ int BlueFS::_flush_and_sync_log_jump_D(uint64_t jump_to)
 
   dout(10) << __func__ << " jumping log offset from 0x" << std::hex
 	   << log.writer->pos << " -> 0x" << jump_to << std::dec << dendl;
+  ceph_assert(log.writer->pos <= jump_to);
   log.writer->pos = jump_to;
   vselector->sub_usage(log.writer->file->vselector_hint, log.writer->file->fnode.size);
   log.writer->file->fnode.size = jump_to;