Miklos Szeredi 63050b3dc0 fuse: fix stack use after return ... commit 3e8cb8b2eaeb22f540f1cbc00cbb594047b7ba89 upstream. Normal, synchronous requests will have their args allocated on the stack. After the FR_FINISHED bit is set by receiving the reply from the userspace fuse server, the originating task may return and reuse the stack frame, resulting in an Oops if the args structure is dereferenced. Fix by setting a flag in the request itself upon initializing, indicating whether it has an asynchronous ->end() callback. Reported-by: Kyle Sanderson <kyle.leet@gmail.com> Reported-by: Michael Stapelberg <michael+lkml@stapelberg.ch> Fixes: 2b319d1f6f ("fuse: don't dereference req->args on finished request") Cc: <stable@vger.kernel.org> # v5.4 Tested-by: Michael Stapelberg <michael+lkml@stapelberg.ch> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-03-18 07:17:52 +01:00
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acl.c	fuse: Support fuse filesystems outside of init_user_ns	2018-03-20 17:11:44 +01:00
control.c	convenience helper: get_tree_single()	2019-07-04 22:01:58 -04:00
cuse.c	fuse: fix memleak in cuse_channel_open	2019-09-24 15:28:01 +02:00
dev.c	fuse: fix stack use after return	2020-03-18 07:17:52 +01:00
dir.c	fuse: verify attributes	2019-12-13 08:42:31 +01:00
file.c	fuse: don't overflow LLONG_MAX with end offset	2020-02-24 08:37:03 +01:00
fuse_i.h	fuse: fix stack use after return	2020-03-18 07:17:52 +01:00
inode.c	virtio-fs: don't show mount options	2019-10-15 16:11:41 +02:00
Kconfig	virtio-fs: add virtiofs filesystem	2019-09-18 20:17:50 +02:00
Makefile	virtio-fs: Change module name to virtiofs.ko	2019-10-14 10:20:33 +02:00
readdir.c	fuse: verify attributes	2019-12-13 08:42:31 +01:00
virtio_fs.c	virtiofs: Remove set but not used variable 'fc'	2019-10-23 10:25:17 +02:00
xattr.c	fuse: rearrange and resize fuse_args fields	2019-09-10 16:29:48 +02:00