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ramfs: A write lock is needed when truncating files.

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Should fix all KDLs in #19360.
This commit is contained in:
Augustin Cavalier
2025-01-16 23:21:47 -05:00
parent 48bfa9ee2f
commit c9892ac20f
1 changed files with 10 additions and 4 deletions
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src/add-ons/kernel/file_systems/ramfs/kernel_interface.cpp
+10 -4
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@@ -952,8 +952,8 @@ ramfs_open(fs_volume* _volume, fs_vnode* _node, int openMode, void** _cookie)
FUNCTION(("node: %lld\n", node->GetID()));
VolumeReadLocker locker(volume);
if (!locker.IsLocked())
VolumeReadLocker readLocker(volume);
if (!readLocker.IsLocked())
RETURN_ERROR(B_ERROR);
status_t error = B_OK;
@@ -974,10 +974,16 @@ ramfs_open(fs_volume* _volume, fs_vnode* _node, int openMode, void** _cookie)
if (!cookie)
SET_ERROR(error, B_NO_MEMORY);
}
readLocker.Unlock();
// truncate if requested
if (error == B_OK && (openMode & O_TRUNC))
if (error == B_OK && (openMode & O_TRUNC)) {
VolumeWriteLocker writeLocker(volume);
error = node->SetSize(0);
NodeMTimeUpdater mTimeUpdater(node);
NodeMTimeUpdater mTimeUpdater(node);
}
// set result / cleanup on failure
if (error == B_OK)
*_cookie = cookie;