diff options
| author | Eric Biggers <ebiggers@google.com> | 2024-08-05 21:27:13 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2024-08-10 07:25:34 +0300 |
| commit | 001412493e74d89166d2441b622eeaea00511bdc (patch) | |
| tree | 1edeeb831b33f1e640d3534c4704c496df549640 /lib/crypto/mpi/mpiutil.c | |
| parent | 4b7acc85de14ee8a2236f54445dc635d47eceac0 (diff) | |
| download | linux-001412493e74d89166d2441b622eeaea00511bdc.tar.xz | |
crypto: x86/aes-gcm - fix PREEMPT_RT issue in gcm_crypt()
On PREEMPT_RT, kfree() takes sleeping locks and must not be called with
preemption disabled. Therefore, on PREEMPT_RT skcipher_walk_done() must
not be called from within a kernel_fpu_{begin,end}() pair, even when
it's the last call which is guaranteed to not allocate memory.
Therefore, move the last skcipher_walk_done() in gcm_crypt() to the end
of the function so that it goes after the kernel_fpu_end(). To make
this work cleanly, rework the data processing loop to handle only
non-last data segments.
Fixes: b06affb1cb58 ("crypto: x86/aes-gcm - add VAES and AVX512 / AVX10 optimized AES-GCM")
Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Closes: https://lore.kernel.org/linux-crypto/20240802102333.itejxOsJ@linutronix.de
Signed-off-by: Eric Biggers <ebiggers@google.com>
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'lib/crypto/mpi/mpiutil.c')
0 files changed, 0 insertions, 0 deletions