KCSAN: data-race in __writeback_single_inode / __xa_set_mark

Status: auto-closed as invalid on 2021/06/18 19:46
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+dedc34775d5910ccdf74@syzkaller.appspotmail.com
First crash: 2237d, last: 1914d

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

write to 0xffff888106b877e4 of 4 bytes by task 22391 on cpu 0:
 xa_mark_set lib/xarray.c:69 [inline]
 xas_set_mark lib/xarray.c:889 [inline]
 __xa_set_mark+0x279/0x290 lib/xarray.c:1899
 __set_page_dirty+0x155/0x1a0 fs/buffer.c:609
 mark_buffer_dirty+0x126/0x200 fs/buffer.c:1133
 __block_commit_write fs/buffer.c:2104 [inline]
 block_write_end+0x13d/0x260 fs/buffer.c:2183
 generic_write_end+0x5e/0x180 fs/buffer.c:2197
 ext4_da_write_end+0x59b/0x730 fs/ext4/inode.c:3110
 generic_perform_write+0x23e/0x3a0 mm/filemap.c:3671
 ext4_buffered_write_iter+0x2f2/0x3f0 fs/ext4/file.c:269
 ext4_file_write_iter+0x2e7/0x11d0 fs/ext4/file.c:519
 call_write_iter include/linux/fs.h:2114 [inline]
 do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740
 do_iter_write+0x112/0x4c0 fs/read_write.c:866
 vfs_iter_write+0x4c/0x70 fs/read_write.c:907
 iter_file_splice_write+0x40a/0x750 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x80/0xa0 fs/splice.c:936
 splice_direct_to_actor+0x345/0x650 fs/splice.c:891
 do_splice_direct+0xf5/0x170 fs/splice.c:979
 do_sendfile+0x773/0xda0 fs/read_write.c:1260
 __do_sys_sendfile64 fs/read_write.c:1319 [inline]
 __se_sys_sendfile64 fs/read_write.c:1311 [inline]
 __x64_sys_sendfile64+0xa9/0x130 fs/read_write.c:1311
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888106b877e4 of 4 bytes by task 22437 on cpu 1:
 xa_marked include/linux/xarray.h:418 [inline]
 mapping_tagged include/linux/fs.h:489 [inline]
 __writeback_single_inode+0x209/0x450 fs/fs-writeback.c:1518
 writeback_single_inode+0x177/0x590 fs/fs-writeback.c:1580
 sync_inode fs/fs-writeback.c:2624 [inline]
 sync_inode_metadata+0x57/0x80 fs/fs-writeback.c:2644
 ext4_fsync_nojournal fs/ext4/fsync.c:92 [inline]
 ext4_sync_file+0x359/0x670 fs/ext4/fsync.c:170
 vfs_fsync_range+0x107/0x120 fs/sync.c:200
 generic_write_sync include/linux/fs.h:2982 [inline]
 ext4_buffered_write_iter+0x39c/0x3f0 fs/ext4/file.c:277
 ext4_file_write_iter+0x2e7/0x11d0 fs/ext4/file.c:519
 call_write_iter include/linux/fs.h:2114 [inline]
 do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740
 do_iter_write+0x112/0x4c0 fs/read_write.c:866
 vfs_iter_write+0x4c/0x70 fs/read_write.c:907
 iter_file_splice_write+0x40a/0x750 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x80/0xa0 fs/splice.c:936
 splice_direct_to_actor+0x345/0x650 fs/splice.c:891
 do_splice_direct+0xf5/0x170 fs/splice.c:979
 do_sendfile+0x773/0xda0 fs/read_write.c:1260
 __do_sys_sendfile64 fs/read_write.c:1319 [inline]
 __se_sys_sendfile64 fs/read_write.c:1311 [inline]
 __x64_sys_sendfile64+0xa9/0x130 fs/read_write.c:1311
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 22437 Comm: syz-executor.3 Tainted: G        W         5.13.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (73):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/05/14 19:45 upstream bd3c9cdb21a2 8bdd5343 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/05/11 04:50 upstream 1140ab592e2e ca873091 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/05/04 02:14 upstream 5e321ded302d 09efdd63 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/04/22 23:01 upstream 90c911ad7445 33c28d03 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/04/20 08:24 upstream 7af08140979a c0ced557 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/04/11 21:36 upstream 7d900724913c 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/04/08 22:19 upstream 3fb4f979b4fa 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/04/07 21:43 upstream 3a22981230f9 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/04/07 00:08 upstream 2d743660786e 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/03/28 21:42 upstream 36a14638f7c0 a8529b82 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/03/25 12:31 upstream e138138003eb 6a383ecf .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/03/24 22:15 upstream 4ee998b0ef8b 607e3baf .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/03/22 05:07 upstream 5ee96fa9dd78 bea32f74 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/03/21 00:57 upstream 812da4d39463 17810eae .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/03/13 14:07 upstream f296bfd5cd04 4a003785 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/03/11 01:11 upstream 05a59d79793d 764067f3 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/03/05 21:17 upstream 280d542f6ffa 4a024a9b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/02/07 02:32 upstream 964d069f93c4 0655e081 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/02/06 02:51 upstream 1e0d27fce010 23a562df .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/01/31 13:31 upstream 6642d600b541 fc9fd31e .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/01/29 23:59 upstream bec4c2968fce fc9fd31e .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/01/28 23:06 upstream e5ff2cb9cf67 7df34f59 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/01/27 10:13 upstream 2ab38c17aac1 a0ebf917 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/01/22 21:55 upstream 83d09ad4b950 52e37319 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/01/19 01:00 upstream 1e2a199f6ccd 63631df1 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/01/18 08:33 upstream 19c329f68089 fd103621 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/01/17 15:42 upstream 0da0a8a0a0e1 fd103621 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __writeback_single_inode / __xa_set_mark
2021/01/14 11:49 upstream 65f0d2414b70 269d24e8 .config console log report info ci2-upstream-kcsan-gce
2021/01/12 21:32 upstream e609571b5ffa 0cdd6185 .config console log report info ci2-upstream-kcsan-gce
2021/01/09 15:29 upstream 996e435fd401 a6c52263 .config console log report info ci2-upstream-kcsan-gce
2021/01/02 01:51 upstream eda809aef534 79264ae3 .config console log report info ci2-upstream-kcsan-gce
2020/12/30 15:59 upstream 139711f033f6 ecb8c012 .config console log report info ci2-upstream-kcsan-gce
2020/12/26 03:44 upstream 5814bc2d4cc2 821e0b09 .config console log report info ci2-upstream-kcsan-gce
2020/12/19 21:47 upstream 467f8165a2b0 04201c06 .config console log report info ci2-upstream-kcsan-gce
2020/12/19 01:33 upstream 3644e2d2dda7 04201c06 .config console log report info ci2-upstream-kcsan-gce
2020/12/12 22:22 upstream 7b1b868e1d91 bca53db9 .config console log report info ci2-upstream-kcsan-gce
2020/12/12 00:35 upstream 7f376f1917d7 bca53db9 .config console log report info ci2-upstream-kcsan-gce
2020/12/09 21:12 upstream ca4bbdaf1716 c090b4da .config console log report info ci2-upstream-kcsan-gce
2020/12/08 21:53 upstream 7d8761ba27fc 40cc414d .config console log report info ci2-upstream-kcsan-gce
2020/12/07 21:34 upstream cd796ed33450 51a9082e .config console log report info ci2-upstream-kcsan-gce
2020/12/01 11:43 upstream b65054597872 07bfe8a5 .config console log report info ci2-upstream-kcsan-gce
2020/11/30 13:15 upstream b65054597872 76831598 .config console log report info ci2-upstream-kcsan-gce
2020/11/26 08:57 upstream fa02fcd94b0c 2f1cec62 .config console log report info ci2-upstream-kcsan-gce
2020/11/21 23:38 upstream a349e4c65960 0d27f508 .config console log report info ci2-upstream-kcsan-gce
2020/11/14 00:25 upstream 9e6a39eae450 1bf9a662 .config console log report info ci2-upstream-kcsan-gce
2020/10/28 00:26 upstream ed8780e3f2ec 96e03c1c .config console log report info ci2-upstream-kcsan-gce
2020/10/25 01:48 upstream d76913908102 a1839e81 .config console log report info ci2-upstream-kcsan-gce
2020/10/23 23:19 upstream 0adc313c4f20 2bb6666c .config console log report info ci2-upstream-kcsan-gce
2020/10/11 20:08 upstream 3dd0130f2430 4a77ae0b .config console log report info ci2-upstream-kcsan-gce
2020/10/11 00:22 upstream da690031a5d6 4a77ae0b .config console log report info ci2-upstream-kcsan-gce
2020/10/01 21:48 upstream fcadab740480 9602ddf4 .config console log report info ci2-upstream-kcsan-gce
2020/09/29 16:06 upstream fb0155a09b02 5abc3f1a .config console log report info ci2-upstream-kcsan-gce
2020/09/26 05:04 upstream 7c7ec3226f5f 4a006f63 .config console log report info ci2-upstream-kcsan-gce
2020/09/21 19:56 upstream ba4f184e126b c81d99c8 .config console log report info ci2-upstream-kcsan-gce
2020/09/20 00:51 upstream eb5f95f1593f 53ce8104 .config console log report info ci2-upstream-kcsan-gce
2020/09/19 16:57 upstream eb5f95f1593f 53ce8104 .config console log report info ci2-upstream-kcsan-gce
2020/09/19 05:07 upstream 92ab97adeefc 53ce8104 .config console log report info ci2-upstream-kcsan-gce
2020/09/19 03:40 upstream 92ab97adeefc 53ce8104 .config console log report info ci2-upstream-kcsan-gce
2020/09/19 02:24 upstream 92ab97adeefc 53ce8104 .config console log report info ci2-upstream-kcsan-gce
2020/09/18 14:56 upstream 10b82d517648 38962c8b .config console log report info ci2-upstream-kcsan-gce
2020/09/06 10:20 upstream dd9fb9bb3340 abf9ba4f .config console log report ci2-upstream-kcsan-gce
2020/09/02 02:16 upstream b765a32a2e91 abf9ba4f .config console log report ci2-upstream-kcsan-gce
2020/08/17 09:45 upstream 9123e3a74ec7 5ce13532 .config console log report ci2-upstream-kcsan-gce
2020/08/06 02:52 upstream fffe3ae0ee84 0487ea6f .config console log report ci2-upstream-kcsan-gce
2020/08/03 11:38 upstream bcf876870b95 96dd3623 .config console log report ci2-upstream-kcsan-gce
2020/07/29 05:01 upstream 6ba1b005ffc3 cb93dc6a .config console log report ci2-upstream-kcsan-gce
2020/07/26 03:08 upstream 04300d66f0a0 1f7cc1ca .config console log report ci2-upstream-kcsan-gce
2020/07/19 02:14 upstream 6cf7ccba29dc 9c812472 .config console log report ci2-upstream-kcsan-gce
2020/07/14 22:33 upstream e9919e11e219 6f458026 .config console log report ci2-upstream-kcsan-gce
2020/07/07 08:04 upstream bfe91da29bfa 42723355 .config console log report ci2-upstream-kcsan-gce
2020/07/06 11:30 upstream dcb7fd82c75e ac5a135b .config console log report ci2-upstream-kcsan-gce
2020/06/29 19:01 upstream 7c30b859a947 ce9ef6f2 .config console log report ci2-upstream-kcsan-gce
2020/06/26 03:02 upstream 4a21185cda0f aea82c00 .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.