duff/android_kernel_motorola_sm6225
1
0 Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()

Browse Source 
[ Upstream commit a85b46db143fda5869e7d8df8f258ccef5fa1719 ]

If overlay is used on top of btrfs, dentry->d_sb translates to overlay's
super block and fsid assignment will lead to a crash.

Use file_inode(file)->i_sb to always get btrfs_sb.

Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Ulrich Hecht <uli@kernel.org>
This commit is contained in:
Goldwyn Rodrigues authored and Ulrich Hecht committed 2026-06-18 12:40:39 +02:00
1 parent 7979f4c184
commit e886355e3d
1 file changed
+7 -4
Download Patch File Download Diff File Expand all files Collapse all files
include/trace/events/btrfs.h
+7 -4
View File
@@ -625,12 +625,15 @@ TRACE_EVENT(btrfs_sync_file,
),
TP_fast_assign(
const struct dentry *dentry = file->f_path.dentry;
const struct inode *inode = d_inode(dentry);
struct dentry *dentry = file_dentry(file);
struct inode *inode = file_inode(file);
struct dentry *parent = dget_parent(dentry);
struct inode *parent_inode = d_inode(parent);
TP_fast_assign_fsid(btrfs_sb(file->f_path.dentry->d_sb));
dput(parent);
TP_fast_assign_fsid(btrfs_sb(inode->i_sb));
__entry->ino = btrfs_ino(BTRFS_I(inode));
__entry->parent = btrfs_ino(BTRFS_I(d_inode(dentry->d_parent)));
__entry->parent = btrfs_ino(BTRFS_I(parent_inode));
__entry->datasync = datasync;
__entry->root_objectid =
BTRFS_I(inode)->root->root_key.objectid;