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WARNING in task_participate_group_stop (2)

Status: upstream: reported C repro on 2018/04/29 17:00
Reported-by: syzbot+b109633ea805cac54a61@syzkaller.appspotmail.com
First crash: 1677d, last: 73d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in corrupted (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log) [merge commit]:
commit c32beba325d8c54d8affa158a0a54643ba87eab4
Author: Olof Johansson <olof@lixom.net>
Date: Thu May 16 06:23:43 2019 +0000

  Merge tag 'mvebu-arm-5.2-1' of git://git.infradead.org/linux-mvebu into arm/late

similar bugs (8):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING in task_participate_group_stop C inconclusive 8 72d 1094d 0/1 upstream: reported C repro on 2019/12/02 14:36
android-414 WARNING in task_participate_group_stop C 2 1365d 1329d 0/1 public: reported C repro on 2019/04/12 00:01
android-44 WARNING in task_participate_group_stop (2) C 4 1365d 1328d 0/2 public: reported C repro on 2019/04/13 00:00
android-49 WARNING in task_participate_group_stop C 15 1785d 1942d 2/3 fixed on 2018/02/06 12:55
upstream WARNING in task_participate_group_stop C 29 1842d 1857d 4/24 fixed on 2018/02/02 04:39
linux-4.19 WARNING in task_participate_group_stop C error 11 73d 1094d 0/1 upstream: reported C repro on 2019/12/02 13:46
android-44 WARNING in task_participate_group_stop C 10 1794d 1801d 2/2 fixed on 2018/02/06 10:09
android-49 WARNING in task_participate_group_stop (2) C 11 1094d 1327d 0/3 public: reported C repro on 2019/04/14 00:00
Patch testing requests:
Created Duration User Patch Repo Result
2022/09/17 23:29 10m upstream report log
2022/09/17 20:29 18m upstream OK log
2022/09/11 01:27 10m upstream error
2022/09/10 22:27 16m upstream OK log
2022/09/10 18:27 16m upstream OK log

Sample crash report:
process 'memfd:[ÛX®[©ýþ­ÑmdÈ…HX©%eà“l¶Z•«' started with executable stack
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8463 at kernel/signal.c:376 task_participate_group_stop+0x2c0/0x370 kernel/signal.c:376
Modules linked in:
CPU: 1 PID: 8463 Comm: 4 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:task_participate_group_stop+0x2c0/0x370 kernel/signal.c:376
Code: 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 9d 00 00 00 48 8b ab 08 05 00 00 e9 d0 fd ff ff e8 e0 f4 2d 00 <0f> 0b e9 81 fe ff ff 48 89 ef e8 d1 bf 73 00 e9 4b fe ff ff e8 c7
RSP: 0018:ffffc90001867c50 EFLAGS: 00010093
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801d61e000 RSI: ffffffff814759a0 RDI: 0000000000000003
RBP: ffff888025e0a3a8 R08: 0000000000000000 R09: 0000000000000003
R10: ffffffff81475810 R11: 0000000000000000 R12: ffff888025e0a300
R13: ffff88801d61e508 R14: 0000000000040000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000ffbbe37b CR3: 00000000143ba000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_signal_stop+0x1f1/0x850 kernel/signal.c:2413
 get_signal+0xc84/0x2160 kernel/signal.c:2673
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0023:0xb7000000
Code: Unable to access opcode bytes at RIP 0xb6ffffd6.
RSP: 002b:00000000ffbbe2a0 EFLAGS: 00000200 ORIG_RAX: 000000000000000b
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Crashes (20):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2021/09/01 05:09 upstream 9c849ce86e0f 7eb7e152 .config log report syz C WARNING in task_participate_group_stop
ci-upstream-kasan-gce-selinux-root 2021/08/06 20:40 upstream 902e7f373fff f9e341e3 .config log report syz C WARNING in task_participate_group_stop
ci-upstream-kasan-gce 2021/02/12 01:55 upstream 291009f656e8 a5f86b15 .config log report syz C WARNING in task_participate_group_stop
ci-upstream-kasan-gce 2019/03/06 18:53 upstream 3717f613f48d 05cf83bf .config log report syz C
ci-upstream-kasan-gce-root 2019/03/06 18:52 upstream 3717f613f48d 05cf83bf .config log report syz C
ci-upstream-kasan-gce-root 2018/04/29 02:26 upstream bf8f5de17442 d5a5d045 .config log report syz C
ci-upstream-kasan-gce 2018/04/28 22:08 upstream a97d8efd9d35 d5a5d045 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2021/08/13 19:33 linux-next 4b358aabb93a 3fd2ea69 .config log report syz WARNING in task_participate_group_stop
ci-upstream-kasan-gce 2020/03/29 01:46 upstream 906c40438bb6 05736b29 .config log report syz
ci-upstream-kasan-gce-root 2019/12/03 10:35 upstream 596cf45cbf6e ab342da3 .config log report syz
ci-upstream-kasan-gce 2019/12/02 14:55 upstream ceb307474506 f879db37 .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/03/06 19:46 upstream 3717f613f48d 05cf83bf .config log report syz
ci-upstream-kasan-gce-smack-root 2019/03/06 18:47 upstream 3717f613f48d 05cf83bf .config log report syz
ci-upstream-kasan-gce-386 2018/05/02 13:48 upstream f2125992e7cb d5b114b4 .config log report syz
ci-upstream-linux-next-kasan-gce-root 2020/04/21 08:59 linux-next ac935d227366 98a9f9e6 .config log report syz
ci-upstream-kasan-gce 2021/05/16 20:05 upstream 63d1cb53e26a f54a5c09 .config log report syz C WARNING in task_participate_group_stop
ci-upstream-kasan-gce-386 2019/12/02 15:34 upstream ceb307474506 f879db37 .config log report syz
ci-upstream-kasan-gce-386 2019/03/06 18:46 upstream 3717f613f48d 05cf83bf .config log report syz
ci-upstream-kasan-gce 2020/01/30 16:06 upstream 39bed42de2e7 5ed23f9a .config log report
ci-upstream-kasan-gce-selinux-root 2018/10/07 07:37 upstream c1d84a1b42ef 8b311eaf .config log report
* Struck through repros no longer work on HEAD.