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UPSTREAM: ANDROID: fuse-bpf: Add NULL pointer check in fuse_release_in

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If open request sent to classic fuse, backing_file is null.
In fuse_release_initialize, fput will trigger a crash.

Bug: 297831741
Signed-off-by: liujing40 <liujing40@xiaomi.corp-partner.google.com>
(cherry picked from https://android-review.googlesource.com/q/commit:4d2ff573981f06ba09e1ddda8726bb73ff6a2c3f)
Merged-In: I2d54d99d62b54c39a6dc9064f8f62488433aff6f
Change-Id: I2d54d99d62b54c39a6dc9064f8f62488433aff6f
This commit is contained in:
liujing40 2023-10-25 15:26:27 +08:00 • committed by Alexander Martinz
commit 3ab55eae01
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1 changed files with 3 additions and 1 deletions
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4
fs/fuse/backing.c
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@ -353,7 +353,9 @@ int fuse_release_initialize(struct fuse_bpf_args *fa, struct fuse_release_in *fr
struct inode *inode, struct fuse_file *ff)
{
/* Always put backing file whatever bpf/userspace says */
fput(ff->backing_file);
if (ff->backing_file) {
fput(ff->backing_file);
}
*fri = (struct fuse_release_in) {
.fh = ff->fh,