Messages in this thread Patch in this message | | | Subject | [patch 11/12] sound/oss/emu10k1/* - compile warning cleanup | From | domen@coderock ... | Date | Sat, 05 Mar 2005 16:35:41 +0100 |
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compile warning cleanup - handle copy_to/from_user error returns
Signed-off-by: Stephen Biggs <yrgrknmxpzlk@gawab.com> Signed-off-by: Domen Puncer <domen@coderock.org> ---
kj-domen/sound/oss/emu10k1/cardwi.c | 13 ++++++++++--- kj-domen/sound/oss/emu10k1/passthrough.c | 12 ++++++++---- 2 files changed, 18 insertions(+), 7 deletions(-)
diff -puN sound/oss/emu10k1/cardwi.c~return_code-sound_oss_emu10k1 sound/oss/emu10k1/cardwi.c --- kj/sound/oss/emu10k1/cardwi.c~return_code-sound_oss_emu10k1 2005-03-05 16:13:11.000000000 +0100 +++ kj-domen/sound/oss/emu10k1/cardwi.c 2005-03-05 16:13:11.000000000 +0100 @@ -306,8 +306,12 @@ void emu10k1_wavein_getxfersize(struct w static void copy_block(u8 __user *dst, u8 * src, u32 str, u32 len, u8 cov) { - if (cov == 1) - __copy_to_user(dst, src + str, len); + if (cov == 1) { + if (__copy_to_user(dst, src + str, len)) { + printk( KERN_ERR "emu10k1: %s: copy_to_user failed\n",__FUNCTION__); + return; + } + } else { u8 byte; u32 i; @@ -316,7 +320,10 @@ static void copy_block(u8 __user *dst, u for (i = 0; i < len; i++) { byte = src[2 * i] ^ 0x80; - __copy_to_user(dst + i, &byte, 1); + if (__copy_to_user(dst + i, &byte, 1)) { + printk( KERN_ERR "emu10k1: %s: copy_to_user failed\n",__FUNCTION__); + return; + } } } } diff -puN sound/oss/emu10k1/passthrough.c~return_code-sound_oss_emu10k1 sound/oss/emu10k1/passthrough.c --- kj/sound/oss/emu10k1/passthrough.c~return_code-sound_oss_emu10k1 2005-03-05 16:13:11.000000000 +0100 +++ kj-domen/sound/oss/emu10k1/passthrough.c 2005-03-05 16:13:11.000000000 +0100 @@ -162,12 +162,14 @@ ssize_t emu10k1_pt_write(struct file *fi DPD(3, "prepend size %d, prepending %d bytes\n", pt->prepend_size, needed); if (count < needed) { - copy_from_user(pt->buf + pt->prepend_size, buffer, count); + if (copy_from_user(pt->buf + pt->prepend_size, buffer, count)) + return -EFAULT; pt->prepend_size += count; DPD(3, "prepend size now %d\n", pt->prepend_size); return count; } - copy_from_user(pt->buf + pt->prepend_size, buffer, needed); + if (copy_from_user(pt->buf + pt->prepend_size, buffer, needed)) + return -EFAULT; r = pt_putblock(wave_dev, (u16 *) pt->buf, nonblock); if (r) return r; @@ -178,7 +180,8 @@ ssize_t emu10k1_pt_write(struct file *fi blocks_copied = 0; while (blocks > 0) { u16 __user *bufptr = (u16 __user *) buffer + (bytes_copied/2); - copy_from_user(pt->buf, bufptr, PT_BLOCKSIZE); + if (copy_from_user(pt->buf, bufptr, PT_BLOCKSIZE)) + return -EFAULT; r = pt_putblock(wave_dev, (u16 *)pt->buf, nonblock); if (r) { if (bytes_copied) @@ -193,7 +196,8 @@ ssize_t emu10k1_pt_write(struct file *fi i = count - bytes_copied; if (i) { pt->prepend_size = i; - copy_from_user(pt->buf, buffer + bytes_copied, i); + if (copy_from_user(pt->buf, buffer + bytes_copied, i)) + return -EFAULT; bytes_copied += i; DPD(3, "filling prepend buffer with %d bytes", i); } _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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