ecryptfs: fix kernel panic with null dev_name
When mounting eCryptfs, a null "dev_name" argument to ecryptfs_mount()
causes a kernel panic if the parsed options are valid. The easiest way to
reproduce this is to call mount() from userspace with an existing
eCryptfs mount's options and a "source" argument of 0.
Error out if "dev_name" is null in ecryptfs_mount()
Fixes: 237fead619
("[PATCH] ecryptfs: fs/Makefile and fs/Kconfig")
Cc: stable@vger.kernel.org
Signed-off-by: Jeffrey Mitchell <jeffrey.mitchell@starlab.io>
Signed-off-by: Tyler Hicks <code@tyhicks.com>
This commit is contained in:
parent
7f06ecd3af
commit
9046625511
@ -492,6 +492,12 @@ static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags
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goto out;
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}
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if (!dev_name) {
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rc = -EINVAL;
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err = "Device name cannot be null";
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goto out;
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}
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rc = ecryptfs_parse_options(sbi, raw_data, &check_ruid);
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if (rc) {
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err = "Error parsing options";
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