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ANDROID: incremental-fs: fix GPF in pending_reads_dispatch_ioctl

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It is possible that fget returns NULL. This needs to be handled
correctly in ioctl_permit_fill.

Bug: 212821226

Signed-off-by: Tadeusz Struk <tadeusz.struk@linaro.org>
Change-Id: Iec8be21982afeab6794b78ab1a542671c52acea2
This commit is contained in:
Tadeusz Struk
2022-01-03 12:50:26 -08:00
committed by Lee Jones
parent 445019bbca
commit 4b1862e4fc
1 changed files with 5 additions and 1 deletions
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6
fs/incfs/pseudo_files.c
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@@ -147,8 +147,12 @@ static long ioctl_permit_fill(struct file *f, void __user *arg)
return -EFAULT; return -EFAULT;
file = fget(permit_fill.file_descriptor); file = fget(permit_fill.file_descriptor);
if (IS_ERR(file)) if (IS_ERR_OR_NULL(file)) {
if (!file)
return -ENOENT;
return PTR_ERR(file); return PTR_ERR(file);
}
if (file->f_op != &incfs_file_ops) { if (file->f_op != &incfs_file_ops) {
error = -EPERM; error = -EPERM;