================================================================== BUG: KCSAN: data-race in __jbd2_journal_drop_transaction / start_this_handle write to 0xffff888102b0c878 of 8 bytes by task 2190 on cpu 0: jbd2_get_transaction fs/jbd2/transaction.c:125 [inline] start_this_handle+0xf1b/0x1250 fs/jbd2/transaction.c:416 jbd2__journal_start+0x1fc/0x3b0 fs/jbd2/transaction.c:525 __ext4_journal_start_sb+0x159/0x2d0 fs/ext4/ext4_jbd2.c:105 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_dirty_inode+0x58/0xa0 fs/ext4/inode.c:5905 __mark_inode_dirty+0x77/0x6a0 fs/fs-writeback.c:2398 generic_update_time fs/inode.c:1776 [inline] update_time fs/inode.c:1789 [inline] file_update_time+0x3b5/0x3f0 fs/inode.c:2005 ext4_page_mkwrite+0x11a/0xec0 fs/ext4/inode.c:6026 do_page_mkwrite mm/memory.c:2870 [inline] do_shared_fault mm/memory.c:4246 [inline] do_fault mm/memory.c:4314 [inline] handle_pte_fault mm/memory.c:4568 [inline] __handle_mm_fault mm/memory.c:4703 [inline] handle_mm_fault+0xd9c/0x1580 mm/memory.c:4801 do_user_addr_fault+0x609/0xbe0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1485 [inline] exc_page_fault+0x91/0x220 arch/x86/mm/fault.c:1541 asm_exc_page_fault+0x1e/0x30 read to 0xffff888102b0c878 of 8 bytes by task 346 on cpu 1: __jbd2_journal_drop_transaction+0x1f0/0x2c0 fs/jbd2/checkpoint.c:803 __jbd2_journal_remove_checkpoint+0x2d5/0x370 fs/jbd2/checkpoint.c:734 jbd2_journal_commit_transaction+0x246e/0x3430 fs/jbd2/commit.c:1019 kjournald2+0x268/0x490 fs/jbd2/journal.c:213 kthread+0x262/0x280 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 value changed: 0x0000000000000000 -> 0xffff88813fe85300 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 346 Comm: jbd2/sda1-8 Not tainted 5.15.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================