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Viewing changes to dracut-module/password-agent.c

Committer: Teddy Hogeborn
Date: 2019-08-01 17:35:45 UTC
mto: This revision was merged to the branch mainline in revision 386.
Revision ID: teddy@recompile.se-20190801173545-swvm0c6e1e00qdwi

password-agent: Fix memory alignment issue

On many architectures (armel, armhf, mips, mips64el, mipsel, hppa,
ia64, sh4, and sparc64) GCC shows a warning when casting a "char *" to
a "struct inotify_event *"; The exact warning message from GCC is
"cast increases required alignment of target type [-Wcast-align]".

* dracut-module/password-agent.c (read_inotify_event): Change
  "ievent_buffer" to an anonymous struct instead of a char array.
  (test_read_inotify_event_IN_CLOSE_WRITE): - '' -
  (test_read_inotify_event_IN_MOVED_TO): - '' -
  (test_read_inotify_event_IN_DELETE): - '' -
  (test_read_inotify_event_IN_CLOSE_WRITE_badname): - '' -
  (test_read_inotify_event_IN_MOVED_TO_badname): - '' -
  (test_read_inotify_event_IN_DELETE_badname): - '' -

files modified:
dracut-module/password-agent.c

Show diffs side-by-side

added added

removed removed

dracut-module/password-agent.c

1071

/* "sufficient to read at least one event." - inotify(7) */

1072

const size_t ievent_size = (sizeof(struct inotify_event)

1073

+ NAME_MAX + 1);

1074

char ievent_buffer[sizeof(struct inotify_event) + NAME_MAX + 1];

1075

struct inotify_event *ievent = ((struct inotify_event *)

1076

ievent_buffer);

1074

struct {

1075

struct inotify_event event;

1076

char name_buffer[NAME_MAX + 1];

1077

} ievent_buffer;

1078

struct inotify_event *const ievent = &ievent_buffer.event;

1077

1079

1078

1080

const ssize_t read_length = read(fd, ievent, ievent_size);

1079

1081

if(read_length == 0){ /* EOF */

3929

3931

const size_t ievent_max_size = (sizeof(struct inotify_event)

3930

3932

+ NAME_MAX + 1);

3931

3933

g_assert_cmpint(ievent_max_size, <=, PIPE_BUF);

3932

char ievent_buffer[sizeof(struct inotify_event) + NAME_MAX + 1];

3933

struct inotify_event *ievent = ((struct inotify_event *)

3934

ievent_buffer);

3934

struct {

3935

struct inotify_event event;

3936

char name_buffer[NAME_MAX + 1];

3937

} ievent_buffer;

3938

struct inotify_event *const ievent = &ievent_buffer.event;

3935

3939

3936

3940

const char dummy_file_name[] = "ask.dummy_file_name";

3937

3941

ievent->mask = IN_CLOSE_WRITE;

3939

3943

memcpy(ievent->name, dummy_file_name, sizeof(dummy_file_name));

3940

3944

const size_t ievent_size = (sizeof(struct inotify_event)

3941

3945

+ sizeof(dummy_file_name));

3942

g_assert_cmpint(write(pipefds[1], ievent_buffer, ievent_size),

3946

g_assert_cmpint(write(pipefds[1], (char *)ievent, ievent_size),

3943

3947

==, ievent_size);

3944

3948

g_assert_cmpint(close(pipefds[1]), ==, 0);

3945

3949

4022

4026

const size_t ievent_max_size = (sizeof(struct inotify_event)

4023

4027

+ NAME_MAX + 1);

4024

4028

g_assert_cmpint(ievent_max_size, <=, PIPE_BUF);

4025

char ievent_buffer[sizeof(struct inotify_event) + NAME_MAX + 1];

4026

struct inotify_event *ievent = ((struct inotify_event *)

4027

ievent_buffer);

4029

struct {

4030

struct inotify_event event;

4031

char name_buffer[NAME_MAX + 1];

4032

} ievent_buffer;

4033

struct inotify_event *const ievent = &ievent_buffer.event;

4028

4034

4029

4035

const char dummy_file_name[] = "ask.dummy_file_name";

4030

4036

ievent->mask = IN_MOVED_TO;

4032

4038

memcpy(ievent->name, dummy_file_name, sizeof(dummy_file_name));

4033

4039

const size_t ievent_size = (sizeof(struct inotify_event)

4034

4040

+ sizeof(dummy_file_name));

4035

g_assert_cmpint(write(pipefds[1], ievent_buffer, ievent_size),

4041

g_assert_cmpint(write(pipefds[1], (char *)ievent, ievent_size),

4036

4042

==, ievent_size);

4037

4043

g_assert_cmpint(close(pipefds[1]), ==, 0);

4038

4044

4117

4123

const size_t ievent_max_size = (sizeof(struct inotify_event)

4118

4124

+ NAME_MAX + 1);

4119

4125

g_assert_cmpint(ievent_max_size, <=, PIPE_BUF);

4120

char ievent_buffer[sizeof(struct inotify_event) + NAME_MAX + 1];

4121

struct inotify_event *ievent = ((struct inotify_event *)

4122

ievent_buffer);

4126

struct {

4127

struct inotify_event event;

4128

char name_buffer[NAME_MAX + 1];

4129

} ievent_buffer;

4130

struct inotify_event *const ievent = &ievent_buffer.event;

4123

4131

4124

4132

const char dummy_file_name[] = "ask.dummy_file_name";

4125

4133

ievent->mask = IN_DELETE;

4127

4135

memcpy(ievent->name, dummy_file_name, sizeof(dummy_file_name));

4128

4136

const size_t ievent_size = (sizeof(struct inotify_event)

4129

4137

+ sizeof(dummy_file_name));

4130

g_assert_cmpint(write(pipefds[1], ievent_buffer, ievent_size),

4138

g_assert_cmpint(write(pipefds[1], (char *)ievent, ievent_size),

4131

4139

==, ievent_size);

4132

4140

g_assert_cmpint(close(pipefds[1]), ==, 0);

4133

4141

4199

4207

const size_t ievent_max_size = (sizeof(struct inotify_event)

4200

4208

+ NAME_MAX + 1);

4201

4209

g_assert_cmpint(ievent_max_size, <=, PIPE_BUF);

4202

char ievent_buffer[sizeof(struct inotify_event) + NAME_MAX + 1];

4203

struct inotify_event *ievent = ((struct inotify_event *)

4204

ievent_buffer);

4210

struct {

4211

struct inotify_event event;

4212

char name_buffer[NAME_MAX + 1];

4213

} ievent_buffer;

4214

struct inotify_event *const ievent = &ievent_buffer.event;

4205

4215

4206

4216

const char dummy_file_name[] = "ignored.dummy_file_name";

4207

4217

ievent->mask = IN_CLOSE_WRITE;

4209

4219

memcpy(ievent->name, dummy_file_name, sizeof(dummy_file_name));

4210

4220

const size_t ievent_size = (sizeof(struct inotify_event)

4211

4221

+ sizeof(dummy_file_name));

4212

g_assert_cmpint(write(pipefds[1], ievent_buffer, ievent_size),

4222

g_assert_cmpint(write(pipefds[1], (char *)ievent, ievent_size),

4213

4223

==, ievent_size);

4214

4224

g_assert_cmpint(close(pipefds[1]), ==, 0);

4215

4225

4273

4283

const size_t ievent_max_size = (sizeof(struct inotify_event)

4274

4284

+ NAME_MAX + 1);

4275

4285

g_assert_cmpint(ievent_max_size, <=, PIPE_BUF);

4276

char ievent_buffer[sizeof(struct inotify_event) + NAME_MAX + 1];

4277

struct inotify_event *ievent = ((struct inotify_event *)

4278

ievent_buffer);

4286

struct {

4287

struct inotify_event event;

4288

char name_buffer[NAME_MAX + 1];

4289

} ievent_buffer;

4290

struct inotify_event *const ievent = &ievent_buffer.event;

4279

4291

4280

4292

const char dummy_file_name[] = "ignored.dummy_file_name";

4281

4293

ievent->mask = IN_MOVED_TO;

4283

4295

memcpy(ievent->name, dummy_file_name, sizeof(dummy_file_name));

4284

4296

const size_t ievent_size = (sizeof(struct inotify_event)

4285

4297

+ sizeof(dummy_file_name));

4286

g_assert_cmpint(write(pipefds[1], ievent_buffer, ievent_size),

4298

g_assert_cmpint(write(pipefds[1], (char *)ievent, ievent_size),

4287

4299

==, ievent_size);

4288

4300

g_assert_cmpint(close(pipefds[1]), ==, 0);

4289

4301

4350

4362

const size_t ievent_max_size = (sizeof(struct inotify_event)

4351

4363

+ NAME_MAX + 1);

4352

4364

g_assert_cmpint(ievent_max_size, <=, PIPE_BUF);

4353

char ievent_buffer[sizeof(struct inotify_event) + NAME_MAX + 1];

4354

struct inotify_event *ievent = ((struct inotify_event *)

4355

ievent_buffer);

4365

struct {

4366

struct inotify_event event;

4367

char name_buffer[NAME_MAX + 1];

4368

} ievent_buffer;

4369

struct inotify_event *const ievent = &ievent_buffer.event;

4356

4370

4357

4371

const char dummy_file_name[] = "ignored.dummy_file_name";

4358

4372

ievent->mask = IN_DELETE;

4360

4374

memcpy(ievent->name, dummy_file_name, sizeof(dummy_file_name));

4361

4375

const size_t ievent_size = (sizeof(struct inotify_event)

4362

4376

+ sizeof(dummy_file_name));

4363

g_assert_cmpint(write(pipefds[1], ievent_buffer, ievent_size),

4377

g_assert_cmpint(write(pipefds[1], (char *)ievent, ievent_size),

4364

4378

==, ievent_size);

4365

4379

g_assert_cmpint(close(pipefds[1]), ==, 0);

4366

4380

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