syzbot


KCSAN: data-race in file_remove_privs / vfs_write

Status: auto-closed as invalid on 2021/07/07 13:49
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+689e26b5ca0bd3eda0d1@syzkaller.appspotmail.com
First crash: 1345d, last: 1020d

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

write to 0xffff888108ae085c of 4 bytes by task 25428 on cpu 1:
 inode_has_no_xattr include/linux/fs.h:3653 [inline]
 file_remove_privs+0x312/0x3a0 fs/inode.c:1954
 __generic_file_write_iter+0xdd/0x300 mm/filemap.c:3735
 generic_file_write_iter+0x75/0x130 mm/filemap.c:3821
 call_write_iter include/linux/fs.h:2114 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x69d/0x770 fs/read_write.c:605
 ksys_pwrite64 fs/read_write.c:712 [inline]
 __do_sys_pwrite64 fs/read_write.c:722 [inline]
 __se_sys_pwrite64 fs/read_write.c:719 [inline]
 __x64_sys_pwrite64+0xf5/0x150 fs/read_write.c:719
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888108ae085c of 4 bytes by task 25364 on cpu 0:
 iocb_flags include/linux/fs.h:3507 [inline]
 init_sync_kiocb include/linux/fs.h:2281 [inline]
 new_sync_write fs/read_write.c:514 [inline]
 vfs_write+0x37c/0x770 fs/read_write.c:605
 ksys_pwrite64 fs/read_write.c:712 [inline]
 __do_sys_pwrite64 fs/read_write.c:722 [inline]
 __se_sys_pwrite64 fs/read_write.c:719 [inline]
 __x64_sys_pwrite64+0xf5/0x150 fs/read_write.c:719
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000000 -> 0x00001000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 25364 Comm: syz-executor.3 Not tainted 5.13.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (201):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/06/02 13:48 upstream 231bc5390667 0740de69 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/31 21:30 upstream c2131f7e73c9 032639db .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/31 16:10 upstream 8124c8a6b353 032639db .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/28 04:51 upstream 97e5bf604b7a 858ea628 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/27 01:12 upstream 7ac3a1c1ae51 858ea628 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/26 15:04 upstream ad9f25d33860 750ce164 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/25 23:15 upstream a050a6d2b7e8 93d3a9f6 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/25 06:48 upstream 1434a3127887 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/24 18:32 upstream c4681547bcce 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/21 18:47 upstream 79a106fc6585 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/19 23:18 upstream c3d0e3fd41b7 a343ba6b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/18 00:01 upstream 8ac91e6c6033 a343ba6b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/17 13:52 upstream d07f6ca923ea a2eb125d .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/13 00:03 upstream dbb5afad100a ed7d41c5 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/11 02:59 upstream 1140ab592e2e ca873091 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/10 15:30 upstream 6efb943b8616 ca873091 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/07 09:42 upstream e48661230cc3 f6da8120 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/07 06:47 upstream e48661230cc3 06585184 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/05 01:21 upstream 5e321ded302d 06c27ff5 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/05/04 03:26 upstream 5e321ded302d 09efdd63 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/28 22:12 upstream 68a32ba14177 77e2b668 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/28 06:49 upstream e359bce39d90 77e2b668 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/27 12:55 upstream 4a0225c3d208 805b5003 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/27 02:36 upstream 9f4ad9e425a1 8ee2dea6 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/24 21:49 upstream 2a1d7946fa53 17f0b706 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/24 13:45 upstream 8db5efb83fa9 17f0b706 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/21 02:45 upstream 1fe5501ba1ab c0ced557 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/19 14:09 upstream bf05bf16c76b 50f523d7 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/18 12:26 upstream c98ff1d013d2 7e2b734b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/17 09:26 upstream 9cdbf6467424 7e2b734b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/16 19:53 upstream 2f7b98d1e55c 7e2b734b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/16 09:30 upstream 7e25f40eab52 c59079a6 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/14 00:29 upstream eebe426d32e1 a184b83e .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/13 20:32 upstream 89698becf06d a184b83e .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/13 11:10 upstream 89698becf06d 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/12 10:27 upstream d434405aaab7 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/12 08:33 upstream 7d900724913c 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/11 15:31 upstream 52e44129fba5 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/10 21:22 upstream d4961772226d 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/09 10:16 upstream 3fb4f979b4fa 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/08 01:59 upstream 3a22981230f9 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/04/06 23:14 upstream 2d743660786e 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in file_remove_privs / vfs_write
2021/01/17 09:18 upstream 54c6247d06f1 65a7a854 .config console log report info ci2-upstream-kcsan-gce
2020/10/23 07:22 upstream 96485e446260 4e740c00 .config console log report info ci2-upstream-kcsan-gce
2020/10/22 09:10 upstream f804b3159482 be6b1582 .config console log report info ci2-upstream-kcsan-gce
2020/07/12 05:59 upstream 0aea6d5c5be3 7ba05d2d .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.