Linux v5.1-rc4-34-g869e3305f23d
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Jeremy Cline
parent
0b76b205ac
commit
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ea2cec24c8d429ee6f99040e4eb6c7ad627fe777
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869e3305f23dfeacdaa234717c92ccb237815d90
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@ -69,7 +69,7 @@ Summary: The Linux kernel
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# The rc snapshot level
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%global rcrev 4
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# The git snapshot level
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%define gitrev 0
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%define gitrev 1
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# Set rpm version accordingly
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%define rpmversion 5.%{upstream_sublevel}.0
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%endif
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@ -585,9 +585,6 @@ Patch501: input-rmi4-remove-the-need-for-artifical-IRQ.patch
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Patch506: 0001-s390-jump_label-Correct-asm-contraint.patch
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Patch507: 0001-Drop-that-for-now.patch
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# rhbz 1688283
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Patch512: v3-tpm-fix-an-invalid-condition-in-tpm_common_poll.patch
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# END OF PATCH DEFINITIONS
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%endif
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@ -1861,6 +1858,9 @@ fi
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#
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#
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%changelog
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* Tue Apr 09 2019 Jeremy Cline <jcline@redhat.com> - 5.1.0-0.rc4.git1.1
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- Linux v5.1-rc4-34-g869e3305f23d
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* Tue Apr 09 2019 Jeremy Cline <jcline@redhat.com>
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- Reenable debugging options.
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1
sources
1
sources
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SHA512 (linux-5.0.tar.xz) = 3fbab70c7b03b1a10e9fa14d1e2e1f550faba4f5792b7699ca006951da74ab86e7d7f19c6a67849ab99343186e7d6f2752cd910d76222213b93c1eab90abf1b0
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SHA512 (patch-5.1-rc4.xz) = 1feffe95816601137c4b2a09a5d14d8b023d05d7a3bb259ea42a05fc52ca48c8176a4477f88bfe4bcd8220f3e174793ddbefe7896807fdafaf5153934222eac2
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SHA512 (patch-5.1-rc4-git1.xz) = 4ebc38b4213c23c1b72275a7027e7bd0bb565d6c89e2d3c2178ec6bd130acedcb98f700833b627035349fd7aa9c3aad10b26afcfece93811c6afae9612adda14
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@ -1,103 +0,0 @@
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From patchwork Thu Mar 21 23:02:12 2019
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X-Patchwork-Submitter: Tadeusz Struk <tadeusz.struk@intel.com>
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X-Patchwork-Id: 10864497
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Subject: [PATCH v3] tpm: fix an invalid condition in tpm_common_poll
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From: Tadeusz Struk <tadeusz.struk@intel.com>
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To: jarkko.sakkinen@linux.intel.com
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Cc: grawity@gmail.com, James.Bottomley@HansenPartnership.com,
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linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org,
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stable@vger.kernel.org, tadeusz.struk@intel.com
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Date: Thu, 21 Mar 2019 16:02:12 -0700
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Message-ID:
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<155320933278.5015.1752135965699928631.stgit@tstruk-mobl1.jf.intel.com>
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The poll condition should only check response_length,
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because reads should only be issued if there is data to read.
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The response_read flag only prevents double writes.
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The problem was that the write set the response_read to false,
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enqued a tpm job, and returned. Then application called poll
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which checked the response_read flag and returned EPOLLIN.
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Then the application called read, but got nothing.
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After all that the async_work kicked in.
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Added also mutex_lock around the poll check to prevent
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other possible race conditions.
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Fixes: 9488585b21bef0df12 ("tpm: add support for partial reads")
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Reported-by: Mantas Mikulėnas <grawity@gmail.com>
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Tested-by: Mantas Mikulėnas <grawity@gmail.com>
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Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
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---
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drivers/char/tpm/tpm-dev-common.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/drivers/char/tpm/tpm-dev-common.c b/drivers/char/tpm/tpm-dev-common.c
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index 5eecad233ea1..7312d3214381 100644
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--- a/drivers/char/tpm/tpm-dev-common.c
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+++ b/drivers/char/tpm/tpm-dev-common.c
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@@ -203,12 +203,14 @@ __poll_t tpm_common_poll(struct file *file, poll_table *wait)
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__poll_t mask = 0;
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poll_wait(file, &priv->async_wait, wait);
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+ mutex_lock(&priv->buffer_mutex);
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- if (!priv->response_read || priv->response_length)
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+ if (priv->response_length)
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mask = EPOLLIN | EPOLLRDNORM;
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else
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mask = EPOLLOUT | EPOLLWRNORM;
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+ mutex_unlock(&priv->buffer_mutex);
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return mask;
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}
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