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linprocfs: vref the vnode passed to vn_fullpath

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This commit is contained in:
Mateusz Guzik 2015-07-11 16:44:28 +00:00
parent c634b75204
commit b34be824a0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=285394
1 changed files with 22 additions and 4 deletions
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26
sys/compat/linprocfs/linprocfs.c
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@ -873,10 +873,20 @@ linprocfs_doprocstatus(PFS_FILL_ARGS)
static int
linprocfs_doproccwd(PFS_FILL_ARGS)
{
struct filedesc *fdp;
struct vnode *vp;
char *fullpath = "unknown";
char *freepath = NULL;
vn_fullpath(td, p->p_fd->fd_cdir, &fullpath, &freepath);
fdp = p->p_fd;
FILEDESC_SLOCK(fdp);
vp = fdp->fd_cdir;
if (vp != NULL)
VREF(vp);
FILEDESC_SUNLOCK(fdp);
vn_fullpath(td, vp, &fullpath, &freepath);
if (vp != NULL)
vrele(vp);
sbuf_printf(sb, "%s", fullpath);
if (freepath)
free(freepath, M_TEMP);
@ -889,12 +899,20 @@ linprocfs_doproccwd(PFS_FILL_ARGS)
static int
linprocfs_doprocroot(PFS_FILL_ARGS)
{
struct vnode *rvp;
struct filedesc *fdp;
struct vnode *vp;
char *fullpath = "unknown";
char *freepath = NULL;
rvp = jailed(p->p_ucred) ? p->p_fd->fd_jdir : p->p_fd->fd_rdir;
vn_fullpath(td, rvp, &fullpath, &freepath);
fdp = p->p_fd;
FILEDESC_SLOCK(fdp);
vp = jailed(p->p_ucred) ? fdp->fd_jdir : fdp->fd_rdir;
if (vp != NULL)
VREF(vp);
FILEDESC_SUNLOCK(fdp);
vn_fullpath(td, vp, &fullpath, &freepath);
if (vp != NULL)
vrele(vp);
sbuf_printf(sb, "%s", fullpath);
if (freepath)
free(freepath, M_TEMP);