syzbot


KCSAN: data-race in fscrypt_file_open / integrity_inode_get

Status: auto-closed as invalid on 2020/04/17 04:04
Subsystems: integrity lsm
[Documentation on labels]
First crash: 1511d, last: 1511d

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

write to 0xffff888128e07774 of 4 bytes by task 13272 on cpu 0:
 integrity_inode_get+0x121/0x1a0 security/integrity/iint.c:124
 process_measurement+0x24d/0x1190 security/integrity/ima/ima_main.c:233
 ima_file_check+0x7e/0xb0 security/integrity/ima/ima_main.c:442
 do_last fs/namei.c:3424 [inline]
 path_openat+0xfdb/0x3580 fs/namei.c:3537
 do_filp_open+0x11e/0x1b0 fs/namei.c:3567
 do_sys_open+0x3b3/0x4f0 fs/open.c:1097
 __do_sys_open fs/open.c:1115 [inline]
 __se_sys_open fs/open.c:1110 [inline]
 __x64_sys_open+0x55/0x70 fs/open.c:1110
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff888128e07774 of 4 bytes by task 13268 on cpu 1:
 fscrypt_require_key include/linux/fscrypt.h:547 [inline]
 fscrypt_file_open+0x3e/0x1d0 fs/crypto/hooks.c:35
 ext4_file_open+0x103/0x490 fs/ext4/file.c:716
 do_dentry_open+0x301/0x970 fs/open.c:797
 vfs_open+0x62/0x80 fs/open.c:914
 do_last fs/namei.c:3420 [inline]
 path_openat+0xf9f/0x3580 fs/namei.c:3537
 do_filp_open+0x11e/0x1b0 fs/namei.c:3567
 do_sys_open+0x3b3/0x4f0 fs/open.c:1097
 __do_sys_open fs/open.c:1115 [inline]
 __se_sys_open fs/open.c:1110 [inline]
 __x64_sys_open+0x55/0x70 fs/open.c:1110
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 13268 Comm: syz-executor.4 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/02/07 03:59 https://github.com/google/ktsan.git kcsan 245a43005292 06150bf1 .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.