36 lines
1.1 KiB
Diff
36 lines
1.1 KiB
Diff
From cd5b2b75554875111bf375b555ebd3b185cff1a0 Mon Sep 17 00:00:00 2001
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From: Joerg Schmidbauer <jschmidb@de.ibm.com>
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Date: Wed, 1 Feb 2023 10:54:33 +0100
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Subject: [libica PATCH] bugfix: permission denied on shared memory segments
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A change to the Linux kernel in 4.19 for added security is
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changing the behavior when opening shared memory segments.
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The O_CREAT flag must not be used for existing segments.
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Signed-off-by: Joerg Schmidbauer <jschmidb@de.ibm.com>
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---
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src/icastats_shared.c | 7 ++++---
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1 file changed, 4 insertions(+), 3 deletions(-)
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diff --git a/src/icastats_shared.c b/src/icastats_shared.c
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index bbc8d0e..8290239 100644
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--- a/src/icastats_shared.c
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+++ b/src/icastats_shared.c
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@@ -54,9 +54,10 @@ int stats_mmap(int user)
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sprintf(shm_id, "icastats_%d",
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user == -1 ? geteuid() : (uid_t)user);
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- stats_shm_handle = shm_open(shm_id,
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- O_CREAT | O_RDWR,
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- S_IRUSR | S_IWUSR);
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+ stats_shm_handle = shm_open(shm_id, O_RDWR, S_IRUSR | S_IWUSR);
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+
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+ if (stats_shm_handle == -1)
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+ stats_shm_handle = shm_open(shm_id, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR);
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if (stats_shm_handle == -1)
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return rc;
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--
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2.39.1
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