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| author | Eric Biggers <ebiggers@google.com> | 2018-12-15 23:40:17 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-12-23 06:52:44 +0300 |
| commit | f9c9bdb5131eee60dc3b92e5126d4c0e291703e2 (patch) | |
| tree | 880c29e660d78a9cd191af522a0068a9c62f7731 /crypto | |
| parent | c9613335bf4fe259a654aa0e9701f0c4cddc12ba (diff) | |
| download | linux-f9c9bdb5131eee60dc3b92e5126d4c0e291703e2.tar.xz | |
crypto: x86/chacha - avoid sleeping under kernel_fpu_begin()
Passing atomic=true to skcipher_walk_virt() only makes the later
skcipher_walk_done() calls use atomic memory allocations, not
skcipher_walk_virt() itself. Thus, we have to move it outside of the
preemption-disabled region (kernel_fpu_begin()/kernel_fpu_end()).
(skcipher_walk_virt() only allocates memory for certain layouts of the
input scatterlist, hence why I didn't notice this earlier...)
Reported-by: syzbot+9bf843c33f782d73ae7d@syzkaller.appspotmail.com
Fixes: 4af78261870a ("crypto: x86/chacha20 - add XChaCha20 support")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
0 files changed, 0 insertions, 0 deletions