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    SubjectRe: [PATCH 185/190] Revert "net: cxgb3_main: fix a missing-check bug"
    On Wed, Apr 21, 2021 at 03:01:00PM +0200, Greg Kroah-Hartman wrote:
    > This reverts commit 2c05d88818ab6571816b93edce4d53703870d7ae.
    >
    > Commits from @umn.edu addresses have been found to be submitted in "bad
    > faith" to try to test the kernel community's ability to review "known
    > malicious" changes. The result of these submissions can be found in a
    > paper published at the 42nd IEEE Symposium on Security and Privacy
    > entitled, "Open Source Insecurity: Stealthily Introducing
    > Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
    > of Minnesota) and Kangjie Lu (University of Minnesota).
    >
    > Because of this, all submissions from this group must be reverted from
    > the kernel tree and will need to be re-reviewed again to determine if
    > they actually are a valid fix. Until that work is complete, remove this
    > change to ensure that no problems are being introduced into the
    > codebase.
    >
    > Cc: Wenwen Wang <wang6495@umn.edu>
    > Cc: David S. Miller <davem@davemloft.net>
    > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    > ---
    > drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c | 17 -----------------
    > 1 file changed, 17 deletions(-)
    >
    > diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
    > index 84ad7261e243..cc6314aa0154 100644
    > --- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
    > +++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
    > @@ -2157,8 +2157,6 @@ static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr)
    > return -EPERM;
    > if (copy_from_user(&t, useraddr, sizeof(t)))
    > return -EFAULT;
    > - if (t.cmd != CHELSIO_SET_QSET_PARAMS)
    > - return -EINVAL;
    > if (t.qset_idx >= SGE_QSETS)
    > return -EINVAL;
    > if (!in_range(t.intr_lat, 0, M_NEWTIMER) ||
    > @@ -2258,9 +2256,6 @@ static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr)
    > if (copy_from_user(&t, useraddr, sizeof(t)))
    > return -EFAULT;
    >
    > - if (t.cmd != CHELSIO_GET_QSET_PARAMS)
    > - return -EINVAL;
    > -
    > /* Display qsets for all ports when offload enabled */
    > if (test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map)) {
    > q1 = 0;
    > @@ -2306,8 +2301,6 @@ static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr)
    > return -EBUSY;
    > if (copy_from_user(&edata, useraddr, sizeof(edata)))
    > return -EFAULT;
    > - if (edata.cmd != CHELSIO_SET_QSET_NUM)
    > - return -EINVAL;
    > if (edata.val < 1 ||
    > (edata.val > 1 && !(adapter->flags & USING_MSIX)))
    > return -EINVAL;
    > @@ -2348,8 +2341,6 @@ static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr)
    > return -EPERM;
    > if (copy_from_user(&t, useraddr, sizeof(t)))
    > return -EFAULT;
    > - if (t.cmd != CHELSIO_LOAD_FW)
    > - return -EINVAL;
    > /* Check t.len sanity ? */
    > fw_data = memdup_user(useraddr + sizeof(t), t.len);
    > if (IS_ERR(fw_data))
    > @@ -2373,8 +2364,6 @@ static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr)
    > return -EBUSY;
    > if (copy_from_user(&m, useraddr, sizeof(m)))
    > return -EFAULT;
    > - if (m.cmd != CHELSIO_SETMTUTAB)
    > - return -EINVAL;
    > if (m.nmtus != NMTUS)
    > return -EINVAL;
    > if (m.mtus[0] < 81) /* accommodate SACK */
    > @@ -2416,8 +2405,6 @@ static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr)
    > return -EBUSY;
    > if (copy_from_user(&m, useraddr, sizeof(m)))
    > return -EFAULT;
    > - if (m.cmd != CHELSIO_SET_PM)
    > - return -EINVAL;
    > if (!is_power_of_2(m.rx_pg_sz) ||
    > !is_power_of_2(m.tx_pg_sz))
    > return -EINVAL; /* not power of 2 */
    > @@ -2453,8 +2440,6 @@ static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr)
    > return -EIO; /* need the memory controllers */
    > if (copy_from_user(&t, useraddr, sizeof(t)))
    > return -EFAULT;
    > - if (t.cmd != CHELSIO_GET_MEM)
    > - return -EINVAL;
    > if ((t.addr & 7) || (t.len & 7))
    > return -EINVAL;
    > if (t.mem_id == MEM_CM)
    > @@ -2507,8 +2492,6 @@ static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr)
    > return -EAGAIN;
    > if (copy_from_user(&t, useraddr, sizeof(t)))
    > return -EFAULT;
    > - if (t.cmd != CHELSIO_SET_TRACE_FILTER)
    > - return -EINVAL;
    >
    > tp = (const struct trace_params *)&t.sip;
    > if (t.config_tx)
    > --
    > 2.31.1
    >

    The original commit looks correct, dropping this revert.

    greg k-h

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