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Fix misuses of bdevname()

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bdevname() fills the buffer that it is given as a parameter, so calling
strcpy() or snprintf() on the returned value is redundant (and probably not
guaranteed to work - I don't think strcpy and snprintf support overlapping
buffers.)

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jean Delvare 2008-05-12 14:02:33 -07:00 committed by Linus Torvalds
parent 78bb6cb9a8
commit f36f21ecca
4 changed files with 6 additions and 8 deletions
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2
block/blktrace.c
View file

@ -476,7 +476,7 @@ int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
switch (cmd) {
case BLKTRACESETUP:
strcpy(b, bdevname(bdev, b));
bdevname(bdev, b);
ret = blk_trace_setup(q, b, bdev->bd_dev, arg);
break;
case BLKTRACESTART:

2
block/compat_ioctl.c
View file

@ -555,7 +555,7 @@ static int compat_blk_trace_setup(struct block_device *bdev, char __user *arg)
if (copy_from_user(&cbuts, arg, sizeof(cbuts)))
return -EFAULT;
strcpy(b, bdevname(bdev, b));
bdevname(bdev, b);
buts = (struct blk_user_trace_setup) {
.act_mask = cbuts.act_mask,

6
fs/ext4/mballoc.c
View file

@ -2639,8 +2639,7 @@ static int ext4_mb_init_per_dev_proc(struct super_block *sb)
struct proc_dir_entry *proc;
char devname[64];
snprintf(devname, sizeof(devname) - 1, "%s",
bdevname(sb->s_bdev, devname));
bdevname(sb->s_bdev, devname);
sbi->s_mb_proc = proc_mkdir(devname, proc_root_ext4);
MB_PROC_HANDLER(EXT4_MB_STATS_NAME, stats);
@ -2674,8 +2673,7 @@ static int ext4_mb_destroy_per_dev_proc(struct super_block *sb)
if (sbi->s_mb_proc == NULL)
return -EINVAL;
snprintf(devname, sizeof(devname) - 1, "%s",
bdevname(sb->s_bdev, devname));
bdevname(sb->s_bdev, devname);
remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_mb_proc);
remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_mb_proc);
remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_mb_proc);

4
fs/jbd2/journal.c
View file

@ -901,7 +901,7 @@ static void jbd2_stats_proc_init(journal_t *journal)
{
char name[BDEVNAME_SIZE];
snprintf(name, sizeof(name) - 1, "%s", bdevname(journal->j_dev, name));
bdevname(journal->j_dev, name);
journal->j_proc_entry = proc_mkdir(name, proc_jbd2_stats);
if (journal->j_proc_entry) {
proc_create_data("history", S_IRUGO, journal->j_proc_entry,
@ -915,7 +915,7 @@ static void jbd2_stats_proc_exit(journal_t *journal)
{
char name[BDEVNAME_SIZE];
snprintf(name, sizeof(name) - 1, "%s", bdevname(journal->j_dev, name));
bdevname(journal->j_dev, name);
remove_proc_entry("info", journal->j_proc_entry);
remove_proc_entry("history", journal->j_proc_entry);
remove_proc_entry(name, proc_jbd2_stats);