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ANDROID: vfs: Add permission2 for filesystems with per mount permissions

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This allows filesystems to use their mount private data to
influence the permssions they return in permission2. It has
been separated into a new call to avoid disrupting current
permission users.

Change-Id: I9d416e3b8b6eca84ef3e336bd2af89ddd51df6ca
Signed-off-by: Daniel Rosenberg <drosen@google.com>
This commit is contained in:
Daniel Rosenberg
2016-10-26 16:27:45 -07:00
committed by Dmitry Shmidt
parent 2757e9bdf4
commit bbcd0ffae5
10 changed files with 156 additions and 64 deletions
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2
fs/exec.c
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@@ -1275,7 +1275,7 @@ EXPORT_SYMBOL(flush_old_exec);
void would_dump(struct linux_binprm *bprm, struct file *file)
{
if (inode_permission(file_inode(file), MAY_READ) < 0)
if (inode_permission2(file->f_path.mnt, file_inode(file), MAY_READ) < 0)
bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP;
}
EXPORT_SYMBOL(would_dump);