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btrfs: fix 64bit compat send ioctl arguments not initializing version member 

commit 5de0434bc064606d6b7467ec3e5ad22963a18c04 upstream.

When the send protocol versioning was added in 5.16 e77fbf9903
("btrfs: send: prepare for v2 protocol"), the 32/64bit compat code was
not updated (added by 2351f431f7 ("btrfs: fix send ioctl on 32bit with
64bit kernel")), missing the version struct member. The compat code is
probably rarely used, nobody reported any bugs.

Found by tool https://github.com/jirislaby/clang-struct .

Fixes: e77fbf9903 ("btrfs: send: prepare for v2 protocol")
CC: stable@vger.kernel.org # 6.1+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Sterba 2023-11-14 17:44:11 +01:00 committed by Greg Kroah-Hartman
parent 32912ee869
commit 7a105de275
1 changed files with 1 additions and 0 deletions
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fs/btrfs/ioctl.c
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@ -5236,6 +5236,7 @@ static int _btrfs_ioctl_send(struct inode *inode, void __user *argp, bool compat
arg->clone_sources = compat_ptr(args32.clone_sources);
arg->parent_root = args32.parent_root;
arg->flags = args32.flags;
arg->version = args32.version;
memcpy(arg->reserved, args32.reserved,
sizeof(args32.reserved));
#else