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KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty (3)

Status: auto-closed as invalid on 2021/07/02 01:51
Subsystems: ext4
[Documentation on labels]
First crash: 1104d, last: 1035d
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty (4) ext4 1 914d 914d 0/26 auto-closed as invalid on 2021/10/31 08:09
upstream KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty ext4 4 1398d 1483d 0/26 closed as invalid on 2020/06/18 14:24
upstream KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty (2) ext4 35 1160d 1207d 0/26 auto-closed as invalid on 2021/02/27 09:33

Sample crash report:
==================================================================
BUG: KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty

write to 0xffff8881069e41dc of 2 bytes by task 6126 on cpu 1:
 ext4_ext_mark_initialized fs/ext4/ext4_extents.h:218 [inline]
 ext4_convert_unwritten_extents_endio fs/ext4/extents.c:3716 [inline]
 ext4_ext_handle_unwritten_extents+0x659/0xaa0 fs/ext4/extents.c:3849
 ext4_ext_map_blocks+0x719/0x1f00 fs/ext4/extents.c:4119
 ext4_map_blocks+0x70d/0xef0 fs/ext4/inode.c:638
 ext4_convert_unwritten_extents+0x15a/0x2c0 fs/ext4/extents.c:4760
 ext4_convert_unwritten_io_end_vec+0xa4/0x130 fs/ext4/extents.c:4799
 ext4_end_io_end fs/ext4/page-io.c:184 [inline]
 ext4_do_flush_completed_IO fs/ext4/page-io.c:257 [inline]
 ext4_end_io_rsv_work+0x198/0x360 fs/ext4/page-io.c:271
 process_one_work+0x3e9/0x8f0 kernel/workqueue.c:2276
 worker_thread+0x636/0xae0 kernel/workqueue.c:2422
 kthread+0x1d0/0x1f0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

read to 0xffff8881069e41dc of 4 bytes by task 18702 on cpu 0:
 ext4_do_update_inode fs/ext4/inode.c:5109 [inline]
 ext4_mark_iloc_dirty+0xd69/0x1750 fs/ext4/inode.c:5724
 __ext4_mark_inode_dirty+0x4db/0x5b0 fs/ext4/inode.c:5918
 ext4_dirty_inode+0x86/0xa0 fs/ext4/inode.c:5947
 __mark_inode_dirty+0x77/0x6c0 fs/fs-writeback.c:2274
 mark_inode_dirty include/linux/fs.h:2404 [inline]
 generic_write_end+0x157/0x180 fs/buffer.c:2223
 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:1325 [inline]
 __se_sys_sendfile64 fs/read_write.c:1311 [inline]
 __x64_sys_sendfile64+0xf2/0x130 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: 0 PID: 18702 Comm: syz-executor.1 Not tainted 5.13.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (28):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/05/28 01:40 upstream 97e5bf604b7a 858ea628 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/05/26 06:57 upstream ad9f25d33860 93d3a9f6 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/05/25 04:26 upstream 1434a3127887 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/05/24 14:11 upstream c4681547bcce 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/05/10 10:53 upstream 6efb943b8616 bc5434be .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/05/09 20:47 upstream 9819f682e48c bc5434be .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/05/08 23:57 upstream b741596468b0 bc5434be .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/05/08 11:35 upstream dd860052c99b bc5434be .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/05/07 21:44 upstream 1ad77a05cfae bc5434be .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/05/06 15:54 upstream 8404c9fbc84b 06585184 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/05/01 09:46 upstream 9f67672a817e 77e2b668 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/04/23 00:10 upstream 90c911ad7445 590921a5 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/04/21 08:39 upstream 1fe5501ba1ab 95777977 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/04/20 08:12 upstream 7af08140979a c0ced557 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/04/19 19:57 upstream bf05bf16c76b 4285c989 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/04/18 23:01 upstream bf05bf16c76b 7e2b734b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/04/18 09:48 upstream c98ff1d013d2 7e2b734b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/04/17 20:36 upstream 194cf4825638 7e2b734b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/04/17 07:18 upstream 9cdbf6467424 7e2b734b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/04/16 06:10 upstream 7e25f40eab52 c59079a6 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/04/10 02:34 upstream 4e04e7513b0f 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/04/09 11:28 upstream 17e7124aad76 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/03/26 03:05 upstream 002322402daf 6a383ecf .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/03/24 18:12 upstream 7acac4b3196c 607e3baf .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/03/24 18:12 upstream 7acac4b3196c 607e3baf .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/03/22 03:32 upstream 5ee96fa9dd78 bea32f74 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/03/20 23:10 upstream 812da4d39463 17810eae .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
2021/03/20 12:05 upstream 1c273e10bc0c e45f5621 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in ext4_ext_handle_unwritten_extents / ext4_mark_iloc_dirty
* Struck through repros no longer work on HEAD.