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ANDROID: fs/passthrough: Fix compatibility with R/O file system

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Look at the passthrough file and check to see if its mount is read-only.

Bug: 297482438
Signed-off-by: Lyon Wang <lyon.wang@mediatek.com>
Change-Id: I0f483c6bcb1effe395eee07b6d721f343840d115
(cherry picked from commit dbeed23196)
This commit is contained in:
Lyon Wang
2023-10-30 19:22:31 +08:00
committed by Todd Kjos
parent abcd4c51e7
commit 48c6c901fe
1 changed files with 2 additions and 1 deletions
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3
fs/fuse/passthrough.c
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@@ -214,7 +214,8 @@ int fuse_passthrough_open(struct fuse_dev *fud, u32 lower_fd)
}
if (!passthrough_filp->f_op->read_iter ||
!passthrough_filp->f_op->write_iter) {
!((passthrough_filp->f_path.mnt->mnt_flags | MNT_READONLY) ||
passthrough_filp->f_op->write_iter)) {
pr_err("FUSE: passthrough file misses file operations.\n");
res = -EBADF;
goto err_free_file;