Date: Fri, 29 Dec 2023 23:08:58 GMT From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: f7e5bdbc683a - stable/14 - armv8_crypto: fix recursive fpu_kern_enter call Message-ID: <202312292308.3BTN8wD7075668@gitrepo.freebsd.org>
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The branch stable/14 has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=f7e5bdbc683acb6c3cfb9a2ae95716e75478e776 commit f7e5bdbc683acb6c3cfb9a2ae95716e75478e776 Author: Zachary Leaf <zachary.leaf@arm.com> AuthorDate: 2023-08-31 13:11:53 +0000 Commit: John Baldwin <jhb@FreeBSD.org> CommitDate: 2023-12-29 21:49:42 +0000 armv8_crypto: fix recursive fpu_kern_enter call Now armv8_crypto is using FPU_KERN_NOCTX, this results in a kernel panic in armv8_crypto.c:armv8_crypto_cipher_setup: panic: recursive fpu_kern_enter while in PCB_FP_NOSAVE state This is because in armv8_crypto.c:armv8_crypto_cipher_process, directly after calling fpu_kern_enter() a call is made to armv8_crypto_cipher_setup(), resulting in nested calls to fpu_kern_enter() without the required fpu_kern_leave() in between. Move fpu_kern_enter() in armv8_crypto_cipher_process() after the call to armv8_crypto_cipher_setup() to resolve this. Reviewed by: markj, andrew Fixes: 6485286f536f ("armv8_crypto: Switch to using FPU_KERN_NOCTX") Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D41671 (cherry picked from commit 565c887a775284bfb1a15eadee2c3f312d288c01) --- sys/crypto/armv8/armv8_crypto.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sys/crypto/armv8/armv8_crypto.c b/sys/crypto/armv8/armv8_crypto.c index fd1d845c29b0..fcbc7e77de29 100644 --- a/sys/crypto/armv8/armv8_crypto.c +++ b/sys/crypto/armv8/armv8_crypto.c @@ -336,8 +336,6 @@ armv8_crypto_cipher_process(struct armv8_crypto_session *ses, crypto_cursor_copy(&fromc, &toc); } - fpu_kern_enter(curthread, NULL, FPU_KERN_NORMAL | FPU_KERN_NOCTX); - if (crp->crp_cipher_key != NULL) { armv8_crypto_cipher_setup(ses, csp, crp->crp_cipher_key, csp->csp_cipher_klen); @@ -345,6 +343,8 @@ armv8_crypto_cipher_process(struct armv8_crypto_session *ses, crypto_read_iv(crp, iv); + fpu_kern_enter(curthread, NULL, FPU_KERN_NORMAL | FPU_KERN_NOCTX); + error = 0; switch (csp->csp_cipher_alg) { case CRYPTO_AES_CBC:
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