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ice: ensure the copied buf is NUL terminated

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BugLink: https://bugs.launchpad.net/bugs/2070349

[ Upstream commit 666854ea9cad844f75a068f32812a2d78004914a ]

Currently, we allocate a count-sized kernel buffer and copy count bytes
from userspace to that buffer. Later, we use sscanf on this buffer but we
don't ensure that the string is terminated inside the buffer, this can lead
to OOB read when using sscanf. Fix this issue by using memdup_user_nul
instead of memdup_user.

Fixes: 96a9a9341c ("ice: configure FW logging")
Fixes: 73671c3162 ("ice: enable FW logging")
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Bui Quang Minh <minhquangbui99@gmail.com>
Link: https://lore.kernel.org/r/20240424-fix-oob-read-v2-1-f1f1b53a10f4@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Bui Quang Minh
2024-04-24 21:44:18 +07:00
committed by Stefan Bader
parent cb40102657
commit de178c7ed1
1 changed files with 4 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/net/ethernet/intel/ice/ice_debugfs.c
+4 -4
View File
@@ -174,7 +174,7 @@ ice_debugfs_module_write(struct file *filp, const char __user *buf,
if (*ppos != 0 || count > 8)
return -EINVAL;
cmd_buf = memdup_user(buf, count);
cmd_buf = memdup_user_nul(buf, count);
if (IS_ERR(cmd_buf))
return PTR_ERR(cmd_buf);
@@ -260,7 +260,7 @@ ice_debugfs_nr_messages_write(struct file *filp, const char __user *buf,
if (*ppos != 0 || count > 4)
return -EINVAL;
cmd_buf = memdup_user(buf, count);
cmd_buf = memdup_user_nul(buf, count);
if (IS_ERR(cmd_buf))
return PTR_ERR(cmd_buf);
@@ -335,7 +335,7 @@ ice_debugfs_enable_write(struct file *filp, const char __user *buf,
if (*ppos != 0 || count > 2)
return -EINVAL;
cmd_buf = memdup_user(buf, count);
cmd_buf = memdup_user_nul(buf, count);
if (IS_ERR(cmd_buf))
return PTR_ERR(cmd_buf);
@@ -431,7 +431,7 @@ ice_debugfs_log_size_write(struct file *filp, const char __user *buf,
if (*ppos != 0 || count > 5)
return -EINVAL;
cmd_buf = memdup_user(buf, count);
cmd_buf = memdup_user_nul(buf, count);
if (IS_ERR(cmd_buf))
return PTR_ERR(cmd_buf);