syzbot


KCSAN: data-race in inode_permission / inode_permission

Status: auto-closed as invalid on 2020/06/11 10:47
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 1017d, last: 857d
similar bugs (4):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in inode_permission / inode_permission (4) 1 642d 608d 0/23 auto-closed as invalid on 2020/12/21 11:15
upstream KCSAN: data-race in inode_permission / inode_permission (5) 12 433d 543d 0/23 auto-closed as invalid on 2021/07/04 17:17
upstream KCSAN: data-race in inode_permission / inode_permission (2) 1 754d 754d 0/23 auto-closed as invalid on 2020/08/17 22:52
upstream KCSAN: data-race in inode_permission / inode_permission (3) 1 716d 716d 0/23 auto-closed as invalid on 2020/09/24 20:47

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

write to 0xffff88811ac81042 of 2 bytes by task 26715 on cpu 0:
 do_inode_permission fs/namei.c:388 [inline]
 inode_permission+0x330/0x360 fs/namei.c:449
 may_open.isra.0+0x13d/0x240 fs/namei.c:3048
 do_last fs/namei.c:3486 [inline]
 path_openat+0xd60/0x2f70 fs/namei.c:3607
 do_filp_open+0x11e/0x1b0 fs/namei.c:3637
 do_sys_openat2+0x4f5/0x620 fs/open.c:1149
 do_sys_open+0xa2/0x110 fs/open.c:1165
 ksys_open include/linux/syscalls.h:1386 [inline]
 __do_sys_open fs/open.c:1171 [inline]
 __se_sys_open fs/open.c:1169 [inline]
 __x64_sys_open+0x50/0x60 fs/open.c:1169
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88811ac81042 of 2 bytes by task 26613 on cpu 1:
 do_inode_permission fs/namei.c:382 [inline]
 inode_permission+0x47/0x360 fs/namei.c:449
 may_open.isra.0+0x13d/0x240 fs/namei.c:3048
 do_last fs/namei.c:3486 [inline]
 path_openat+0xd60/0x2f70 fs/namei.c:3607
 do_filp_open+0x11e/0x1b0 fs/namei.c:3637
 do_sys_openat2+0x4f5/0x620 fs/open.c:1149
 do_sys_open+0xa2/0x110 fs/open.c:1165
 ksys_open include/linux/syscalls.h:1386 [inline]
 __do_sys_open fs/open.c:1171 [inline]
 __se_sys_open fs/open.c:1169 [inline]
 __x64_sys_open+0x50/0x60 fs/open.c:1169
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 26613 Comm: syz-executor.3 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (27):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-kcsan-gce 2020/04/02 10:41 https://github.com/google/ktsan.git kcsan 40959e34d670 a34e2c33 .config log report
ci2-upstream-kcsan-gce 2020/03/28 23:58 https://github.com/google/ktsan.git kcsan 40959e34d670 05736b29 .config log report
ci2-upstream-kcsan-gce 2020/03/25 22:19 https://github.com/google/ktsan.git kcsan 40959e34d670 e8e6c7d2 .config log report
ci2-upstream-kcsan-gce 2020/03/16 05:08 https://github.com/google/ktsan.git kcsan 941e0d917bbf 749688d2 .config log report
ci2-upstream-kcsan-gce 2020/03/12 07:52 https://github.com/google/ktsan.git kcsan 941e0d917bbf d850e9d0 .config log report
ci2-upstream-kcsan-gce 2020/03/04 22:36 https://github.com/google/ktsan.git kcsan 766d004d1b85 576fb9bc .config log report
ci2-upstream-kcsan-gce 2020/02/23 06:49 https://github.com/google/ktsan.git kcsan 766d004d1b85 2c36e7a7 .config log report
ci2-upstream-kcsan-gce 2020/02/14 16:35 https://github.com/google/ktsan.git kcsan b12d66a6c34f 5d7b90f1 .config log report
ci2-upstream-kcsan-gce 2020/02/05 00:38 https://github.com/google/ktsan.git kcsan 245a43005292 93e5e335 .config log report
ci2-upstream-kcsan-gce 2020/01/18 11:15 https://github.com/google/ktsan.git kcsan 245a43005292 3de7aabb .config log report
ci2-upstream-kcsan-gce 2020/01/03 23:09 https://github.com/google/ktsan.git kcsan 245a43005292 68256974 .config log report
ci2-upstream-kcsan-gce 2020/01/03 03:05 https://github.com/google/ktsan.git kcsan 245a43005292 25a0186e .config log report
ci2-upstream-kcsan-gce 2019/12/23 21:47 https://github.com/google/ktsan.git kcsan 245a43005292 be5c2c81 .config log report
ci2-upstream-kcsan-gce 2019/12/16 08:46 https://github.com/google/ktsan.git kcsan 245a43005292 eef6e580 .config log report
ci2-upstream-kcsan-gce 2019/12/02 11:45 https://github.com/google/ktsan.git kcsan ef798c30ba4e f879db37 .config log report
ci2-upstream-kcsan-gce 2019/12/01 13:35 https://github.com/google/ktsan.git kcsan ef798c30ba4e a76bf83f .config log report
ci2-upstream-kcsan-gce 2019/11/23 08:15 https://github.com/google/ktsan.git kcsan 5863cc791e4c 598ca6c8 .config log report
ci2-upstream-kcsan-gce 2019/11/18 00:28 https://github.com/google/ktsan.git kcsan 5863cc791e4c d5696d51 .config log report
ci2-upstream-kcsan-gce 2019/11/16 08:15 https://github.com/google/ktsan.git kcsan 5863cc791e4c cdac920b .config log report
ci2-upstream-kcsan-gce 2019/11/12 07:07 https://github.com/google/ktsan.git kcsan 94c006602e13 377d77fa .config log report
ci2-upstream-kcsan-gce 2019/11/05 10:53 https://github.com/google/ktsan.git kcsan 94c006602e13 76630fc9 .config log report
ci2-upstream-kcsan-gce 2019/11/04 05:35 https://github.com/google/ktsan.git kcsan 05f2236801fe b35fad31 .config log report
ci2-upstream-kcsan-gce 2019/11/03 11:13 https://github.com/google/ktsan.git kcsan 05f2236801fe c9610487 .config log report
ci2-upstream-kcsan-gce 2019/11/03 01:28 https://github.com/google/ktsan.git kcsan 05f2236801fe d603afc9 .config log report
ci2-upstream-kcsan-gce 2019/10/30 21:05 https://github.com/google/ktsan.git kcsan 05f2236801fe a41ca8fa .config log report
ci2-upstream-kcsan-gce 2019/10/25 13:13 https://github.com/google/ktsan.git kcsan 05f2236801fe 04ca72cd .config log report
ci2-upstream-kcsan-gce 2019/10/25 01:16 https://github.com/google/ktsan.git kcsan 05f2236801fe d01bb02a .config log report