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commit48f89d2a29upstream. IV transfer from ofifo to class2 (set up at [29][30]) is not guaranteed to be scheduled before the data transfer from ofifo to external memory (set up at [38]: [29] 10FA0004 ld: ind-nfifo (len=4) imm [30] 81F00010 <nfifo_entry: ofifo->class2 type=msg len=16> [31] 14820004 ld: ccb2-datasz len=4 offs=0 imm [32] 00000010 data:0x00000010 [33] 8210010D operation: cls1-op aes cbc init-final enc [34] A8080B04 math: (seqin + math0)->vseqout len=4 [35] 28000010 seqfifold: skip len=16 [36] A8080A04 math: (seqin + math0)->vseqin len=4 [37] 2F1E0000 seqfifold: both msg1->2-last2-last1 len=vseqinsz [38] 69300000 seqfifostr: msg len=vseqoutsz [39] 5C20000C seqstr: ccb2 ctx len=12 offs=0 If ofifo -> external memory transfer happens first, DECO will hang (issuing a Watchdog Timeout error, if WDOG is enabled) waiting for data availability in ofifo for the ofifo -> c2 ififo transfer. Make sure IV transfer happens first by waiting for all CAAM internal transfers to end before starting payload transfer. New descriptor with jump command inserted at [37]: [..] [36] A8080A04 math: (seqin + math0)->vseqin len=4 [37] A1000401 jump: jsl1 all-match[!nfifopend] offset=[01] local->[38] [38] 2F1E0000 seqfifold: both msg1->2-last2-last1 len=vseqinsz [39] 69300000 seqfifostr: msg len=vseqoutsz [40] 5C20000C seqstr: ccb2 ctx len=12 offs=0 [Note: the issue is present in the descriptor from the very beginning (cf. Fixes tag). However I've marked it v4.19+ since it's the oldest maintained kernel that the patch applies clean against.] Cc: <stable@vger.kernel.org> # v4.19+ Fixes:1acebad3d8("crypto: caam - faster aead implementation") Signed-off-by: Horia Geantă <horia.geanta@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.