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authorEric W. Biederman <ebiederm@xmission.com>2020-06-24 17:01:18 -0500
committerEric W. Biederman <ebiederm@xmission.com>2020-07-04 09:34:26 -0500
commit21d598280675c463ea1b264fab06e9614aacd1e1 (patch)
treee79f7b73e455642ddb904dfef0b4ca24ebe091d4 /kernel/umh.c
parent3a171042aeab8702391c311d84633a6c267d566c (diff)
umh: Remove call_usermodehelper_setup_file.
The only caller of call_usermodehelper_setup_file is fork_usermode_blob. In fork_usermode_blob replace call_usermodehelper_setup_file with call_usermodehelper_setup and delete fork_usermodehelper_setup_file. For this to work the argv_free is moved from umh_clean_and_save_pid to fork_usermode_blob. v1: https://lkml.kernel.org/r/87zh8qf0mp.fsf_-_@x220.int.ebiederm.org v2: https://lkml.kernel.org/r/87o8p163u1.fsf_-_@x220.int.ebiederm.org Link: https://lkml.kernel.org/r/20200702164140.4468-4-ebiederm@xmission.com Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Alexei Starovoitov <ast@kernel.org> Tested-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel/umh.c')
-rw-r--r--kernel/umh.c42
1 files changed, 11 insertions, 31 deletions
diff --git a/kernel/umh.c b/kernel/umh.c
index 26c3d493f168..b8fa9b99b366 100644
--- a/kernel/umh.c
+++ b/kernel/umh.c
@@ -402,33 +402,6 @@ struct subprocess_info *call_usermodehelper_setup(const char *path, char **argv,
}
EXPORT_SYMBOL(call_usermodehelper_setup);
-struct subprocess_info *call_usermodehelper_setup_file(struct file *file,
- int (*init)(struct subprocess_info *info, struct cred *new),
- void (*cleanup)(struct subprocess_info *info), void *data)
-{
- struct subprocess_info *sub_info;
- struct umh_info *info = data;
- const char *cmdline = (info->cmdline) ? info->cmdline : "usermodehelper";
-
- sub_info = kzalloc(sizeof(struct subprocess_info), GFP_KERNEL);
- if (!sub_info)
- return NULL;
-
- sub_info->argv = argv_split(GFP_KERNEL, cmdline, NULL);
- if (!sub_info->argv) {
- kfree(sub_info);
- return NULL;
- }
-
- INIT_WORK(&sub_info->work, call_usermodehelper_exec_work);
- sub_info->path = "none";
- sub_info->file = file;
- sub_info->init = init;
- sub_info->cleanup = cleanup;
- sub_info->data = data;
- return sub_info;
-}
-
static int umd_setup(struct subprocess_info *info, struct cred *new)
{
struct umh_info *umh_info = info->data;
@@ -479,8 +452,6 @@ static void umd_cleanup(struct subprocess_info *info)
fput(umh_info->pipe_to_umh);
fput(umh_info->pipe_from_umh);
}
-
- argv_free(info->argv);
}
/**
@@ -501,7 +472,9 @@ static void umd_cleanup(struct subprocess_info *info)
*/
int fork_usermode_blob(void *data, size_t len, struct umh_info *info)
{
+ const char *cmdline = (info->cmdline) ? info->cmdline : "usermodehelper";
struct subprocess_info *sub_info;
+ char **argv = NULL;
struct file *file;
ssize_t written;
loff_t pos = 0;
@@ -520,11 +493,16 @@ int fork_usermode_blob(void *data, size_t len, struct umh_info *info)
}
err = -ENOMEM;
- sub_info = call_usermodehelper_setup_file(file, umd_setup, umd_cleanup,
- info);
+ argv = argv_split(GFP_KERNEL, cmdline, NULL);
+ if (!argv)
+ goto out;
+
+ sub_info = call_usermodehelper_setup("none", argv, NULL, GFP_KERNEL,
+ umd_setup, umd_cleanup, info);
if (!sub_info)
goto out;
+ sub_info->file = file;
err = call_usermodehelper_exec(sub_info, UMH_WAIT_EXEC);
if (!err) {
mutex_lock(&umh_list_lock);
@@ -532,6 +510,8 @@ int fork_usermode_blob(void *data, size_t len, struct umh_info *info)
mutex_unlock(&umh_list_lock);
}
out:
+ if (argv)
+ argv_free(argv);
fput(file);
return err;
}

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