lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Fri, 18 Dec 2020 11:55:37 +0100
From:   Rasmus Villemoes <>
To:     "David S . Miller" <>,
        Jakub Kicinski <>
Cc:, Zhao Qiang <>,
        Li Yang <>, Andrew Lunn <>,,
        Rasmus Villemoes <>
Subject: [PATCH net v2 2/3] ethernet: ucc_geth: fix definition and size of ucc_geth_tx_global_pram

Table 8-53 in the QUICC Engine Reference manual shows definitions of
fields up to a size of 192 bytes, not just 128. But in table 8-111,
one does find the text

  Base Address of the Global Transmitter Parameter RAM Page. [...]
  The user needs to allocate 128 bytes for this page. The address must
  be aligned to the page size.

I've checked both rev. 7 (11/2015) and rev. 9 (05/2018) of the manual;
they both have this inconsistency (and the table numbers are the

Adding a bit of debug printing, on my board the struct
ucc_geth_tx_global_pram is allocated at offset 0x880, while
the (opaque) ucc_geth_thread_data_tx gets allocated immediately
afterwards, at 0x900. So whatever the engine writes into the thread
data overlaps with the tail of the global tx pram (and devmem says
that something does get written during a simple ping).

I haven't observed any failure that could be attributed to this, but
it seems to be the kind of thing that would be extremely hard to
debug. So extend the struct definition so that we do allocate 192

Signed-off-by: Rasmus Villemoes <>
 drivers/net/ethernet/freescale/ucc_geth.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/ucc_geth.h b/drivers/net/ethernet/freescale/ucc_geth.h
index 3fe903972195..c80bed2c995c 100644
--- a/drivers/net/ethernet/freescale/ucc_geth.h
+++ b/drivers/net/ethernet/freescale/ucc_geth.h
@@ -575,7 +575,14 @@ struct ucc_geth_tx_global_pram {
 	u32 vtagtable[0x8];	/* 8 4-byte VLAN tags */
 	u32 tqptr;		/* a base pointer to the Tx Queues Memory
 				   Region */
-	u8 res2[0x80 - 0x74];
+	u8 res2[0x78 - 0x74];
+	u64 snums_en;
+	u32 l2l3baseptr;	/* top byte consists of a few other bit fields */
+	u16 mtu[8];
+	u8 res3[0xa8 - 0x94];
+	u32 wrrtablebase;	/* top byte is reserved */
+	u8 res4[0xc0 - 0xac];
 } __packed;
 /* structure representing Extended Filtering Global Parameters in PRAM */

Powered by blists - more mailing lists