36 lines
1.2 KiB
Diff
36 lines
1.2 KiB
Diff
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Martin Wilck <mwilck@suse.com>
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Date: Fri, 6 Mar 2020 21:50:30 +0100
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Subject: [PATCH] libmpathpersist: limit PRIN allocation length to 8192 bytes
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Some targets (notably the qemu-pr-helper) don't support PERSISTENT
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RESERVE IN commands with more than 8192 bytes allocation length.
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While I have found no explicit requirement in the SCSI specs that
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the allocation lengh may not exceed 8k, an 8k limit is also enforced
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by sg_persist(8), and actually by mpathpersist itself for the
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--allocation-length option, but not for the auto-determined length.
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Fix that.
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Reviewed-by: Benjamin Marzinski <bmarzins@redhat.com>
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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---
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libmpathpersist/mpath_pr_ioctl.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/libmpathpersist/mpath_pr_ioctl.c b/libmpathpersist/mpath_pr_ioctl.c
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index 74b26b0c..1a28cba7 100644
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--- a/libmpathpersist/mpath_pr_ioctl.c
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+++ b/libmpathpersist/mpath_pr_ioctl.c
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@@ -543,5 +543,7 @@ int get_prin_length(int rq_servact)
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mx_resp_len = 0;
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break;
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}
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+ if (mx_resp_len > MPATH_MAX_PARAM_LEN)
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+ mx_resp_len = MPATH_MAX_PARAM_LEN;
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return mx_resp_len;
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}
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--
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2.17.2
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