syzbot


KCSAN: data-race in __send_signal / futex_wait_queue_me (2)

Status: auto-closed as invalid on 2021/07/07 21:48
Reported-by: syzbot+f7e11a83094efc0a1419@syzkaller.appspotmail.com
First crash: 791d, last: 442d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in __send_signal / futex_wait_queue_me 20 792d 832d 0/23 closed as invalid on 2020/06/18 14:24

Sample crash report:
==================================================================
BUG: KCSAN: data-race in __send_signal / futex_wait_queue_me

write to 0xffff888105d490ac of 4 bytes by task 1734 on cpu 1:
 freezer_do_not_count include/linux/freezer.h:109 [inline]
 freezable_schedule include/linux/freezer.h:171 [inline]
 futex_wait_queue_me+0x198/0x260 kernel/futex.c:2606
 futex_wait+0x143/0x430 kernel/futex.c:2708
 do_futex+0x9d8/0x1ee0 kernel/futex.c:3732
 __do_sys_futex kernel/futex.c:3805 [inline]
 __se_sys_futex+0x21c/0x380 kernel/futex.c:3786
 __x64_sys_futex+0x74/0x80 kernel/futex.c:3786
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888105d490ac of 4 bytes by task 1736 on cpu 0:
 __send_signal+0x282/0x760 kernel/signal.c:1138
 send_signal+0x281/0x390 kernel/signal.c:1284
 do_send_sig_info kernel/signal.c:1333 [inline]
 do_send_specific+0x13d/0x1c0 kernel/signal.c:3881
 do_tkill kernel/signal.c:3907 [inline]
 __do_sys_tgkill kernel/signal.c:3926 [inline]
 __se_sys_tgkill kernel/signal.c:3920 [inline]
 __x64_sys_tgkill+0x108/0x140 kernel/signal.c:3920
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00404040 -> 0x40404040

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1736 Comm: syz-fuzzer Tainted: G        W         5.13.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (384):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-kcsan-gce 2021/06/02 21:47 upstream 324c92e5e0ee 0740de69 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/30 23:45 upstream 8124c8a6b353 325a8dab .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/29 16:17 upstream 6799d4f2da49 325a8dab .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/29 08:35 upstream 6799d4f2da49 858ea628 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/28 19:25 upstream 5ff2756afde0 858ea628 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/28 01:47 upstream 97e5bf604b7a 858ea628 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/27 12:46 upstream d7c5303fbc8a 858ea628 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/26 10:16 upstream ad9f25d33860 750ce164 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/25 02:56 upstream 1434a3127887 3c7fef33 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/24 13:28 upstream c4681547bcce 3c7fef33 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/22 03:30 upstream 45af60e7ced0 3c7fef33 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/20 17:21 upstream f01da525b3de c560a65d .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/20 11:58 upstream c3d0e3fd41b7 c560a65d .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/17 22:16 upstream 8ac91e6c6033 a343ba6b .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/15 08:09 upstream 25a1298726e9 8bdd5343 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/11 21:15 upstream 88b06399c9c7 b3c3bb8e .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/07 04:17 upstream e48661230cc3 06585184 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/06 15:06 upstream 8404c9fbc84b 06585184 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/06 10:45 upstream 8404c9fbc84b 06c27ff5 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/05 03:01 upstream d665ea6ea86c 06c27ff5 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/04 13:48 upstream 5e321ded302d 06c27ff5 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/05/03 04:55 upstream 9ccce092fc64 77e2b668 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/30 01:00 upstream 8ca5297e7e38 77e2b668 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/27 11:25 upstream 4a0225c3d208 805b5003 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/26 23:07 upstream 9f4ad9e425a1 8ee2dea6 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/26 09:36 upstream 9f4ad9e425a1 805b5003 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/25 07:30 upstream 2a1d7946fa53 36c88236 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/23 13:04 upstream 18a3c5f7abfd 17f0b706 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/22 23:41 upstream 90c911ad7445 590921a5 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/21 09:15 upstream 1fe5501ba1ab 95777977 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/19 23:08 upstream 7af08140979a 4285c989 .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/18 09:43 upstream c98ff1d013d2 7e2b734b .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/17 21:11 upstream 194cf4825638 7e2b734b .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/17 06:59 upstream 9cdbf6467424 7e2b734b .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/16 12:57 upstream 7e25f40eab52 7e2b734b .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/14 11:34 upstream 50987beca096 3134b37f .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/13 19:34 upstream 89698becf06d a184b83e .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/10 00:44 upstream 4e04e7513b0f 6a81331a .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/08 21:56 upstream 3fb4f979b4fa 6a81331a .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/08 08:42 upstream 454859c552da 6a81331a .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/07 19:12 upstream 3a22981230f9 6a81331a .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/04 22:28 upstream e49d033bddf5 6a81331a .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/03 13:20 upstream d93a0d43e3d0 6a81331a .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/04/02 07:19 upstream 1678e493d530 6a81331a .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/03/31 19:15 upstream d19cc4bfbff1 6a81331a .config log report info KCSAN: data-race in __send_signal / futex_wait_queue_me
ci2-upstream-kcsan-gce 2021/01/16 20:59 upstream 54c6247d06f1 65a7a854 .config log report info
ci2-upstream-kcsan-gce 2020/07/04 00:03 upstream 0c7d7d1fada7 51095195 .config log report
ci2-upstream-kcsan-gce 2020/06/30 22:39 upstream 7c30b859a947 c0383ebe .config log report
ci2-upstream-kcsan-gce 2020/06/19 03:26 upstream 5e857ce6eae7 bc258b50 .config log report