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support: Add check for TID zero in support_wait_for_thread_exit

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liqingqing_1229 2022-01-21 10:40:22 +08:00
parent 3e354e4554
commit 2fe3fe9429
2 changed files with 48 additions and 2 deletions
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6
glibc.spec
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@ -66,7 +66,7 @@
##############################################################################
Name: glibc
Version: 2.34
Release: 43
Release: 44
Summary: The GNU libc libraries
License: %{all_license}
URL: http://www.gnu.org/software/glibc/
@ -163,6 +163,7 @@ Patch75: socket-Add-the-__sockaddr_un_set-function.patch
Patch76: CVE-2022-23219-Buffer-overflow-in-sunrpc-clnt_create.patch
Patch77: sunrpc-Test-case-for-clnt_create-unix-buffer-overflo.patch
Patch78: CVE-2022-23218-Buffer-overflow-in-sunrpc-svcunix_cre.patch
Patch79: support-Add-check-for-TID-zero-in-support_wait_for_t.patch
Patch9000: turn-default-value-of-x86_rep_stosb_threshold_form_2K_to_1M.patch
Patch9001: delete-no-hard-link-to-avoid-all_language-package-to.patch
@ -1365,6 +1366,9 @@ fi
%endif
%changelog
* Fri Jan 21 Qingqing Li <liqingqing3@huawei.com> - 2.34-44
- support: Add check for TID zero in support_wait_for_thread_exit
* Tue Jan 18 Qingqing Li <liqingqing3@huawei.com> - 2.34-43
- fix CVE-2022-23218 and CVE-2022-23219

42
support-Add-check-for-TID-zero-in-support_wait_for_t.patch Normal file
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@ -0,0 +1,42 @@
From 176c88f5214d8107d330971cbbfbbba5186a111f Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Fri, 1 Oct 2021 18:16:41 +0200
Subject: [PATCH] support: Add check for TID zero in
support_wait_for_thread_exit
Some kernel versions (observed with kernel 5.14 and earlier) can list
"0" entries in /proc/self/task. This happens when a thread exits
while the task list is being constructed. Treat this entry as not
present, like the proposed kernel patch does:
[PATCH] procfs: Do not list TID 0 in /proc/<pid>/task
<https://lore.kernel.org/all/8735pn5dx7.fsf@oldenburg.str.redhat.com/>
Fixes commit 032d74eaf6179100048a5bf0ce942e97dc8b9a60 ("support: Add
support_wait_for_thread_exit").
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
---
support/support_wait_for_thread_exit.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/support/support_wait_for_thread_exit.c b/support/support_wait_for_thread_exit.c
index 658a813..5e3be42 100644
--- a/support/support_wait_for_thread_exit.c
+++ b/support/support_wait_for_thread_exit.c
@@ -43,7 +43,10 @@ support_wait_for_thread_exit (void)
return;
}
- if (strcmp (e->d_name, ".") == 0 || strcmp (e->d_name, "..") == 0)
+ /* In some kernels, "0" entries denote a thread that has just
+ exited. */
+ if (strcmp (e->d_name, ".") == 0 || strcmp (e->d_name, "..") == 0
+ || strcmp (e->d_name, "0") == 0)
continue;
int task_tid = atoi (e->d_name);
--
1.8.3.1