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| author | Ivan Vecera <ivecera@redhat.com> | 2015-06-11 15:52:26 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-06-11 15:57:17 -0700 |
| commit | d0e6a8064c4293a1e087b2fdd6c2b67cd8ba8f56 (patch) | |
| tree | 01eda6dfa3e210601706141cf8be5e97a69d865b /drivers/net/ethernet/brocade | |
| parent | 93719d266a196d7e4a65c88ec6e90ae5e2424075 (diff) | |
| download | linux-d0e6a8064c4293a1e087b2fdd6c2b67cd8ba8f56.tar.gz linux-d0e6a8064c4293a1e087b2fdd6c2b67cd8ba8f56.tar.bz2 linux-d0e6a8064c4293a1e087b2fdd6c2b67cd8ba8f56.zip | |
bna: use memdup_user to copy userspace buffers
Patch converts kzalloc->copy_from_user sequence to memdup_user. There
is also one useless assignment of NULL to bnad->regdata as it is followed
by assignment of kzalloc output.
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/brocade')
| -rw-r--r-- | drivers/net/ethernet/brocade/bna/bnad_debugfs.c | 27 |
1 files changed, 8 insertions, 19 deletions
diff --git a/drivers/net/ethernet/brocade/bna/bnad_debugfs.c b/drivers/net/ethernet/brocade/bna/bnad_debugfs.c index 72c89550417c..ad7af5c4f211 100644 --- a/drivers/net/ethernet/brocade/bna/bnad_debugfs.c +++ b/drivers/net/ethernet/brocade/bna/bnad_debugfs.c @@ -321,15 +321,10 @@ bnad_debugfs_write_regrd(struct file *file, const char __user *buf, unsigned long flags; void *kern_buf; - /* Allocate memory to store the user space buf */ - kern_buf = kzalloc(nbytes, GFP_KERNEL); - if (!kern_buf) - return -ENOMEM; - - if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) { - kfree(kern_buf); - return -ENOMEM; - } + /* Copy the user space buf */ + kern_buf = memdup_user(buf, nbytes); + if (IS_ERR(kern_buf)) + return PTR_ERR(kern_buf); rc = sscanf(kern_buf, "%x:%x", &addr, &len); if (rc < 2) { @@ -341,7 +336,6 @@ bnad_debugfs_write_regrd(struct file *file, const char __user *buf, kfree(kern_buf); kfree(bnad->regdata); - bnad->regdata = NULL; bnad->reglen = 0; bnad->regdata = kzalloc(len << 2, GFP_KERNEL); @@ -388,15 +382,10 @@ bnad_debugfs_write_regwr(struct file *file, const char __user *buf, unsigned long flags; void *kern_buf; - /* Allocate memory to store the user space buf */ - kern_buf = kzalloc(nbytes, GFP_KERNEL); - if (!kern_buf) - return -ENOMEM; - - if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) { - kfree(kern_buf); - return -ENOMEM; - } + /* Copy the user space buf */ + kern_buf = memdup_user(buf, nbytes); + if (IS_ERR(kern_buf)) + return PTR_ERR(kern_buf); rc = sscanf(kern_buf, "%x:%x", &addr, &val); if (rc < 2) { |