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| author | Colin Ian King <colin.king@canonical.com> | 2019-11-05 18:51:08 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-07 16:29:17 +0100 |
| commit | 94fed404109d301312bbdf73d7007976ffca3482 (patch) | |
| tree | 256850638a0729067d6f2f167322c044545b42d1 | |
| parent | staging: vboxsf: Remove unused including <linux/version.h> (diff) | |
| download | linux-94fed404109d301312bbdf73d7007976ffca3482.tar.xz linux-94fed404109d301312bbdf73d7007976ffca3482.zip | |
staging: vboxsf: fix dereference of pointer dentry before it is null checked
Currently the pointer dentry is being dereferenced before it is
being null checked. Fix this by only dereferencing dentry once
we know it is not null.
Addresses-Coverity: ("Dereference before null check")
Fixes: df4028658f9d ("staging: Add VirtualBox guest shared folder (vboxsf) support")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20191105175108.79824-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/vboxsf/utils.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/staging/vboxsf/utils.c b/drivers/staging/vboxsf/utils.c index 1870b69c824e..34a49e6f74fc 100644 --- a/drivers/staging/vboxsf/utils.c +++ b/drivers/staging/vboxsf/utils.c @@ -174,7 +174,7 @@ int vboxsf_stat_dentry(struct dentry *dentry, struct shfl_fsobjinfo *info) int vboxsf_inode_revalidate(struct dentry *dentry) { - struct vboxsf_sbi *sbi = VBOXSF_SBI(dentry->d_sb); + struct vboxsf_sbi *sbi; struct vboxsf_inode *sf_i; struct shfl_fsobjinfo info; struct timespec64 prev_mtime; @@ -187,6 +187,7 @@ int vboxsf_inode_revalidate(struct dentry *dentry) inode = d_inode(dentry); prev_mtime = inode->i_mtime; sf_i = VBOXSF_I(inode); + sbi = VBOXSF_SBI(dentry->d_sb); if (!sf_i->force_restat) { if (time_before(jiffies, dentry->d_time + sbi->o.ttl)) return 0; |