[PATCH 140/190] Revert "isdn: mISDN: Fix potential NULL pointer dereference of kzalloc"

Greg Kroah-Hartman
2021-04-21T13:17:13Z

This reverts commit 38d22659803a033b1b66cd2624c33570c0dde77d.

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: Aditya Pakki <pakki001@umn.edu>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/isdn/hardware/mISDN/hfcsusb.c | 3 ---
1 file changed, 3 deletions(-)

diff --git a/drivers/isdn/hardware/mISDN/hfcsusb.c b/drivers/isdn/hardware/mISDN/hfcsusb.c
index 70061991915a..4bb470d3963d 100644
--- a/drivers/isdn/hardware/mISDN/hfcsusb.c
+++ b/drivers/isdn/hardware/mISDN/hfcsusb.c
@@ -249,9 +249,6 @@ hfcsusb_ph_info(struct hfcsusb *hw)
int i;

phi = kzalloc(struct_size(phi, bch, dch->dev.nrbchan), GFP_ATOMIC);
- if (!phi)
- return;
-
phi->dch.ch.protocol = hw->protocol;
phi->dch.ch.Flags = dch->Flags;
phi->dch.state = dch->state;
--
2.31.1