From: Wang Shilong <[email protected]>

U32_MAX is reserved for special purpose,
qid_has_mapping() will return false if projid is
4294967295, dqget() will return NULL for it.

So U32_MAX is unsupported Project ID, fix to forbid it.

Signed-off-by: Wang Shilong <[email protected]>
---
 fs/f2fs/file.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index ceb575f99048..861edf3c01d5 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3066,6 +3066,8 @@ int f2fs_fileattr_set(struct user_namespace *mnt_userns,
        u32 iflags;
        int err;
 
+       if (fa->fsx_projid >= U32_MAX)
+               return -EINVAL;
        if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
                return -EIO;
        if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode)))
-- 
2.27.0



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