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namei: make sure nd->depth is always valid

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Zero it in set_nameidata() rather than in path_init().  That way
it always matches the number of valid nd->stack[] entries.
Since terminate_walk() does zero it (after having emptied the
stack), we don't need to reinitialize it in subsequent path_init().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2021-04-03 16:49:44 -04:00
parent 06422964c8
commit 7962c7d196
1 changed files with 1 additions and 1 deletions
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2
fs/namei.c
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@@ -581,6 +581,7 @@ static void __set_nameidata(struct nameidata *p, int dfd, struct filename *name)
{ {
struct nameidata *old = current->nameidata; struct nameidata *old = current->nameidata;
p->stack = p->internal; p->stack = p->internal;
p->depth = 0;
p->dfd = dfd; p->dfd = dfd;
p->name = name; p->name = name;
p->path.mnt = NULL; p->path.mnt = NULL;
@@ -2320,7 +2321,6 @@ static const char *path_init(struct nameidata *nd, unsigned flags)
nd->flags = flags; nd->flags = flags;
nd->state |= ND_JUMPED; nd->state |= ND_JUMPED;
nd->depth = 0;
nd->m_seq = __read_seqcount_begin(&mount_lock.seqcount); nd->m_seq = __read_seqcount_begin(&mount_lock.seqcount);
nd->r_seq = __read_seqcount_begin(&rename_lock.seqcount); nd->r_seq = __read_seqcount_begin(&rename_lock.seqcount);