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Takashi Yano b160b690b6 Cygwin: console: Fix a race issue between close() and open(). 
The open() call for console sometimes fails if the console owner
process is closing the console by close() at the same time. This
is due to mismatch state of con.owner variable and attaching state
to the console. With this patch, checking con.owner and attaching
to con.owner sequence in open(), and resetting con.owner and freeing
console sequence in close() are guarded by output_mutex to avoid
such a race issue.
Addresses: https://cygwin.com/pipermail/cygwin/2024-March/255575.html

Fixes: 3721a756b0 ("Cygwin: console: Make the console accessible from other terminals.")
Reported-by: Kate Deplaix <kit-ty-kate@outlook.com>
Signed-off-by: Takashi Yano <takashi.yano@nifty.ne.jp>
 		2024-03-04 11:58:09 +09:00
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3.1.0 Cygwin: add strtold fix to release message 2019-12-16 16:39:17 +01:00
3.1.1 Cygwin: add 3.1.1 release text belatedly 2019-12-18 10:47:43 +01:00
3.1.2 Cygwin: add 3.1.2 release text 2019-12-21 11:44:08 +01:00
3.1.3 Cygwin: move 3.1.3 to 3.1.4 release document 2020-02-18 11:22:57 +01:00
3.1.4 Cygwin: add @cjksingle to release docs 2020-02-18 11:35:42 +01:00
3.1.5 Cygwin: stat: fix st_mode of fifos again 2020-05-28 13:34:19 -04:00
3.1.6 Cygwin: add microcode patch to release messages 2020-07-09 09:55:34 +02:00
3.1.7 Cygwin: main exception handler (64-bit): continue GCC exceptions 2020-08-18 07:04:25 -04:00
3.2.0 Cygwin: add "app execution aliases" treatment to release notes 2021-03-23 16:54:41 +01:00
3.3.0 Cygwin: convert malloc lock to SRWLOCK 2021-10-26 18:47:22 +02:00
3.3.2 Cygwin: pipe: Avoid false EOF while reading output of C# programs. 2021-11-08 11:06:58 +01:00
3.3.3 Cygwin: Fix release note 3.3.3. 2021-11-23 01:19:56 +09:00
3.3.4 Cygwin: select: don't report read ready on a FIFO never opened for writing 2022-10-19 08:17:50 -04:00
3.3.5 Cygwin: Fix "0x0x" in gmondump and ssp man pages 2022-04-27 11:40:09 +02:00
3.3.6 newlocale: fix crash when trying to write to __C_locale 2022-08-12 12:29:26 +02:00
3.4.0 Cygwin: add release message for commit previous commit 8d138c3f66 2022-12-03 16:36:49 +01:00
3.4.1 Cygwin: pipe: Fix performance degradation for non-cygwin pipe. 2022-12-09 21:01:29 +09:00
3.4.2 Cygwin: add 3.4.2 release notes 2022-12-11 11:45:36 +01:00
3.4.3 Cygwin: Update 3.4.3 release note 2022-12-16 13:36:22 +00:00
3.4.4 Cygwin: open_shared: try harder allocating a shared region 2023-01-17 18:41:10 +01:00
3.4.5 Cygwin: Add 3.4.5 release message 2023-01-19 18:33:40 +01:00
3.4.6 Cygwin: chmod: don't drop default ACEs from directory ACLs 2023-02-09 21:58:20 +01:00
3.4.7 Cygwin: Fix latest release message being in the wrong release file. 2023-07-04 16:50:37 +02:00
3.4.8 Cygwin: shared: Fix access permissions setting in open_shared(). 2023-08-16 22:11:17 +09:00
3.4.9 Cygwin: document latest sys/cpuset.h fix 2023-09-01 12:42:10 +02:00
3.4.10 Cygwin: open(2): reset sparseness on O_TRUNCated files 2023-11-28 10:55:33 +01:00
3.5.0 Cygwin: fix arc4random after fork(2) 2024-01-29 13:43:36 +01:00
3.5.1 Cygwin: add release text for getgrent local SAM enumeration patch 2024-02-26 15:56:10 +01:00
3.5.2 Cygwin: console: Fix a race issue between close() and open(). 2024-03-04 11:58:09 +09:00
3.6.0 Cygwin: timespec_get: implement C11 function 2024-02-16 20:44:31 +01:00