28 lines
879 B
Diff
28 lines
879 B
Diff
From: David Howells <dhowells@redhat.com>
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Date: Wed, 8 Nov 2017 15:11:37 +0000
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Subject: [25/29] Lock down /proc/kcore
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Origin: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit?id=797378dc4498207c3abc1101cfdc9ef2581d8c71
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Disallow access to /proc/kcore when the kernel is locked down to prevent
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access to cryptographic data.
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Signed-off-by: David Howells <dhowells@redhat.com>
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Reviewed-by: James Morris <james.l.morris@oracle.com>
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---
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fs/proc/kcore.c | 2 ++
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1 file changed, 2 insertions(+)
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Index: linux/fs/proc/kcore.c
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===================================================================
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--- linux.orig/fs/proc/kcore.c
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+++ linux/fs/proc/kcore.c
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@@ -545,6 +545,8 @@ out:
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static int open_kcore(struct inode *inode, struct file *filp)
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{
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+ if (kernel_is_locked_down("/proc/kcore"))
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+ return -EPERM;
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if (!capable(CAP_SYS_RAWIO))
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return -EPERM;
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