================================================================== BUG: KCSAN: data-race in __ext4_journal_start_sb / jbd2_journal_update_sb_log_tail write to 0xffff888103665000 of 8 bytes by task 1403 on cpu 1: jbd2_journal_update_sb_log_tail+0x176/0x1b0 fs/jbd2/journal.c:1689 jbd2_journal_commit_transaction+0x21e/0x3460 fs/jbd2/commit.c:430 kjournald2+0x263/0x480 fs/jbd2/journal.c:213 kthread+0x2c7/0x2e0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 read to 0xffff888103665000 of 8 bytes by task 29439 on cpu 0: is_journal_aborted include/linux/jbd2.h:1695 [inline] ext4_journal_check_start fs/ext4/ext4_jbd2.c:82 [inline] __ext4_journal_start_sb+0xf2/0x310 fs/ext4/ext4_jbd2.c:98 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_dirty_inode+0x58/0xa0 fs/ext4/inode.c:5916 __mark_inode_dirty+0x72/0x6c0 fs/fs-writeback.c:2399 generic_update_time fs/inode.c:1782 [inline] inode_update_time+0x1b4/0x1d0 fs/inode.c:1795 file_update_time+0x1f3/0x230 fs/inode.c:2012 ext4_page_mkwrite+0x14d/0xf40 fs/ext4/inode.c:6037 do_page_mkwrite mm/memory.c:2856 [inline] do_shared_fault mm/memory.c:4229 [inline] do_fault mm/memory.c:4297 [inline] handle_pte_fault mm/memory.c:4551 [inline] __handle_mm_fault mm/memory.c:4686 [inline] handle_mm_fault+0xdb8/0x1590 mm/memory.c:4784 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+0x91/0x290 arch/x86/mm/fault.c:1541 asm_exc_page_fault+0x1e/0x30 value changed: 0x0000000000000038 -> 0x0000000000000230 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 29439 Comm: syz-executor.5 Not tainted 5.16.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================