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KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction

Status: auto-closed as invalid on 2021/04/16 10:05
Subsystems: ext4
[Documentation on labels]
First crash: 1141d, last: 1112d

Sample crash report:
==================================================================
BUG: KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction

write to 0xffff88810624b800 of 8 bytes by task 4803 on cpu 1:
 jbd2_journal_commit_transaction+0x2962/0x3290 fs/jbd2/commit.c:1181
 kjournald2+0x263/0x480 fs/jbd2/journal.c:213
 kthread+0x20b/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

read to 0xffff88810624b800 of 8 bytes by task 27465 on cpu 0:
 is_journal_aborted include/linux/jbd2.h:1647 [inline]
 is_handle_aborted include/linux/jbd2.h:1654 [inline]
 __ext4_handle_dirty_metadata+0x11a/0x590 fs/ext4/ext4_jbd2.c:333
 ext4_do_update_inode fs/ext4/inode.c:5141 [inline]
 ext4_mark_iloc_dirty+0x12f2/0x16f0 fs/ext4/inode.c:5724
 __ext4_mark_inode_dirty+0x4db/0x5e0 fs/ext4/inode.c:5918
 ext4_dirty_inode+0x86/0xa0 fs/ext4/inode.c:5947
 __mark_inode_dirty+0x72/0x6f0 fs/fs-writeback.c:2274
 generic_update_time fs/inode.c:1766 [inline]
 update_time fs/inode.c:1779 [inline]
 file_update_time+0x3a4/0x3e0 fs/inode.c:1995
 file_modified+0x62/0x80 fs/inode.c:2018
 ext4_write_checks fs/ext4/file.c:247 [inline]
 ext4_buffered_write_iter+0x1f9/0x3e0 fs/ext4/file.c:264
 ext4_file_write_iter+0x48a/0x10b0 fs/ext4/file.c:502
 call_write_iter include/linux/fs.h:1977 [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+0x7a6/0xe20 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+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 27465 Comm: syz-executor.3 Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (13):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/03/12 10:05 upstream f78d76e72a46 429d8a6b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
2021/03/11 20:47 upstream 28806e4d9b97 429d8a6b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
2021/03/05 18:05 upstream 280d542f6ffa 4a024a9b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
2021/03/05 06:04 upstream 280d542f6ffa 9d751681 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
2021/03/04 17:31 upstream f69d02e37a85 f89ed068 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
2021/03/04 06:33 upstream f69d02e37a85 d7e4e604 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
2021/02/21 18:10 upstream 55f62bc87347 a659b3f1 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
2021/02/20 09:50 upstream f40ddce88593 3e5ed8b4 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
2021/02/17 06:59 upstream f40ddce88593 052f8d9f .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
2021/02/13 22:33 upstream ac30d8ce28d6 98682e5e .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
2021/02/13 08:51 upstream c6d8570e4d64 98682e5e .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
2021/02/11 18:06 upstream 291009f656e8 a5f86b15 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
2021/02/10 21:59 upstream 291009f656e8 a52ee10a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction
* Struck through repros no longer work on HEAD.