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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
Change-Id: I2d54d99d62b54c39a6dc9064f8f62488433aff6f
Signed-off-by: liujing40 <liujing40@xiaomi.corp-partner.google.com>
This commit is contained in:
liujing40
2023-10-25 15:26:27 +08:00
committed by Paul Lawrence
parent 8431e524d6
commit b496cc3115
1 changed files with 3 additions and 1 deletions
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4
fs/fuse/backing.c
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@@ -300,7 +300,9 @@ int fuse_release_initialize(struct fuse_bpf_args *fa, struct fuse_release_in *fr
struct inode *inode, struct fuse_file *ff) struct inode *inode, struct fuse_file *ff)
{ {
/* Always put backing file whatever bpf/userspace says */ /* 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) { *fri = (struct fuse_release_in) {
.fh = ff->fh, .fh = ff->fh,