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charset="utf-8" X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1011; i=brauner@kernel.org; h=from:subject:message-id; bh=jBwXVCCRpDjmnAajxR/zAvEvmAtZKAE0jCj6+Cnx3v0=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS9zrv3a4XNr8e6d1tDr0b7KBzIWafbojAr+fDFhXfE9 vg02md3dpSyMIhxMciKKbI4tJuEyy3nqdhslKkBM4eVCWQIAxenAEzk4g5Ghh8f/uzl4px+y8Ir 7Jr5ATWGvLtVV5S3nzBgvC4T9mgf8xtGhl0p83Un1Eie5LavWZ4U5lee5LyI7VCWQtVx3w8B4jw qjAA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit proc_scsi_host_write() copies what is written into a page and hands it to ->write_info() without terminating it. ppa and imm parse it with strncmp() and simple_strtoul(), which read on past what was written into whatever the page held before. Terminate the copy. A write is at most PROC_BLOCK_SIZE bytes, so the page always has room for that. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Signed-off-by: Christian Brauner (Amutable) --- drivers/scsi/scsi_proc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/scsi/scsi_proc.c b/drivers/scsi/scsi_proc.c index fdc355d783da..dbd03360b5a4 100644 --- a/drivers/scsi/scsi_proc.c +++ b/drivers/scsi/scsi_proc.c @@ -80,6 +80,7 @@ static ssize_t proc_scsi_host_write(struct file *file, const char __user *buf, ret = -EFAULT; if (copy_from_user(page, buf, count)) goto out; + page[count] = '\0'; ret = shost->hostt->write_info(shost, page, count); } out: -- 2.53.0