43 lines
1.5 KiB
Diff
43 lines
1.5 KiB
Diff
From 176c88f5214d8107d330971cbbfbbba5186a111f Mon Sep 17 00:00:00 2001
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From: Florian Weimer <fweimer@redhat.com>
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Date: Fri, 1 Oct 2021 18:16:41 +0200
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Subject: [PATCH] support: Add check for TID zero in
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support_wait_for_thread_exit
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Some kernel versions (observed with kernel 5.14 and earlier) can list
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"0" entries in /proc/self/task. This happens when a thread exits
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while the task list is being constructed. Treat this entry as not
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present, like the proposed kernel patch does:
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[PATCH] procfs: Do not list TID 0 in /proc/<pid>/task
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<https://lore.kernel.org/all/8735pn5dx7.fsf@oldenburg.str.redhat.com/>
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Fixes commit 032d74eaf6179100048a5bf0ce942e97dc8b9a60 ("support: Add
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support_wait_for_thread_exit").
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Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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Tested-by: Carlos O'Donell <carlos@redhat.com>
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---
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support/support_wait_for_thread_exit.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/support/support_wait_for_thread_exit.c b/support/support_wait_for_thread_exit.c
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index 658a813..5e3be42 100644
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--- a/support/support_wait_for_thread_exit.c
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+++ b/support/support_wait_for_thread_exit.c
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@@ -43,7 +43,10 @@ support_wait_for_thread_exit (void)
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return;
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}
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- if (strcmp (e->d_name, ".") == 0 || strcmp (e->d_name, "..") == 0)
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+ /* In some kernels, "0" entries denote a thread that has just
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+ exited. */
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+ if (strcmp (e->d_name, ".") == 0 || strcmp (e->d_name, "..") == 0
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+ || strcmp (e->d_name, "0") == 0)
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continue;
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int task_tid = atoi (e->d_name);
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--
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1.8.3.1
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