syzbot


KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode (2)

Status: moderation: reported on 2020/10/14 12:01
Labels: ext4 (incorrect?)
Reported-by: syzbot+dd7eafdc93343dca0f7d@syzkaller.appspotmail.com
First crash: 1072d, last: 27m
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode 43 1100d 1308d 0/24 closed as invalid on 2020/06/18 14:24

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

read-write to 0xffff888109e0fcd0 of 8 bytes by task 34 on cpu 1:
 __writeback_single_inode+0x201/0x860 fs/fs-writeback.c:1639
 writeback_sb_inodes+0x511/0xaa0 fs/fs-writeback.c:1894
 __writeback_inodes_wb+0x9a/0x1a0 fs/fs-writeback.c:1965
 wb_writeback+0x24d/0x6c0 fs/fs-writeback.c:2070
 wb_check_start_all fs/fs-writeback.c:2192 [inline]
 wb_do_writeback fs/fs-writeback.c:2218 [inline]
 wb_workfn+0x4ea/0x8d0 fs/fs-writeback.c:2251
 process_one_work+0x3e6/0x750 kernel/workqueue.c:2405
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2552
 kthread+0x1d7/0x210 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read to 0xffff888109e0fcd0 of 8 bytes by task 5262 on cpu 0:
 __mark_inode_dirty+0x58/0x7d0 fs/fs-writeback.c:2406
 mark_inode_dirty include/linux/fs.h:2144 [inline]
 generic_write_end+0x18e/0x360 fs/buffer.c:2257
 ext4_da_write_end+0x4df/0x690 fs/ext4/inode.c:3012
 generic_perform_write+0x253/0x3d0 mm/filemap.c:3934
 ext4_buffered_write_iter+0x234/0x3e0 fs/ext4/file.c:289
 ext4_file_write_iter+0xd7/0x10e0
 call_write_iter include/linux/fs.h:1868 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x47b/0x780 fs/read_write.c:584
 ksys_write+0xeb/0x1a0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x0000000000020087 -> 0x0000000000020084

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 5262 Comm: syz-executor.4 Not tainted 6.4.0-rc4-syzkaller-00099-g1874a42a7d74 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
==================================================================

Crashes (482):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
2023/06/01 23:20 upstream 1874a42a7d74 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/06/01 22:12 upstream 929ed21dfdb6 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/06/01 14:27 upstream 929ed21dfdb6 babc4389 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/31 23:33 upstream 48b1320a674e babc4389 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/30 23:54 upstream afead42fdfca df37c7f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/30 18:22 upstream 8b817fded42d df37c7f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/30 02:53 upstream 8b817fded42d cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/29 00:13 upstream 7877cb91f108 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/28 13:51 upstream 416839029e38 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/27 12:37 upstream 49572d536129 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/26 18:14 upstream 0d85b27b0cc6 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/26 05:19 upstream 9db898594c54 b40ef614 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/20 14:35 upstream d635f6cc934b 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/20 05:16 upstream cbd6ac3837cd 96689200 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/18 18:08 upstream 4d6d4c7f541d 3bb7af1d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/17 09:32 upstream f1fcbaa18b28 eaac4681 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/16 10:37 upstream f1fcbaa18b28 71b00cfb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/15 10:52 upstream f1fcbaa18b28 c4d362e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/14 12:37 upstream bb7c241fae62 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/14 03:00 upstream d4d58949a6ea 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/11 22:24 upstream 105131df9c3b adb9a3cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/09 19:59 upstream 1dc3731daf1f 30aa2a7e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/08 16:27 upstream ac9a78681b92 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/04 12:48 upstream 1a5304fecee5 3a560463 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/05/04 10:17 upstream fa31fc82fb77 5b7ff9dd .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/30 18:39 upstream 825a0714d2b3 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/29 08:49 upstream 89d77f71f493 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/28 17:58 upstream 33afd4b76393 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/28 10:16 upstream 35fab9271b7e 70a605de .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/27 16:24 upstream 6e98b09da931 6f3d6fa7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/27 08:35 upstream 5c7ecada25d2 19a3dabe .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/26 10:21 upstream 0cfd8703e7da 8d843721 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/26 03:42 upstream 0cfd8703e7da 65320f8e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/23 21:35 upstream 457391b03803 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/23 08:03 upstream 622322f53c6d 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/22 22:00 upstream 2caeeb9d4a1b 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/22 05:54 upstream 8e41e0a57566 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/21 16:07 upstream 2af3e53a4dc0 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/19 06:36 upstream af67688dca57 94b4184e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/17 13:31 upstream 6a8f57ae2eb0 c6ec7083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/17 00:42 upstream 6a8f57ae2eb0 ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/15 16:24 upstream 7a934f4bd7d6 ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2023/04/15 00:52 upstream 95abc817ab3a ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
2021/01/02 22:07 upstream 3516bd729358 79264ae3 .config console log report info ci2-upstream-kcsan-gce
2020/10/13 22:55 upstream 6ad4bf6ea160 fc7735a2 .config console log report info ci2-upstream-kcsan-gce
2020/06/24 10:34 upstream 3e08a95294a4 41694dbf .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.