syzbot

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BUG: KCSAN: data-race in mem_cgroup_track_foreign_dirty_slowpath / mem_cgroup_track_foreign_dirty_slowpath

write to 0xffff888117395770 of 8 bytes by task 2748 on cpu 1:
 mem_cgroup_track_foreign_dirty_slowpath+0x3b3/0x440
 mem_cgroup_track_foreign_dirty include/linux/memcontrol.h:1730 [inline]
 folio_account_dirtied mm/page-writeback.c:2683 [inline]
 __folio_mark_dirty+0x403/0x4e0 mm/page-writeback.c:2723
 mark_buffer_dirty+0x148/0x250 fs/buffer.c:1200
 __jbd2_journal_temp_unlink_buffer+0x25a/0x2a0 fs/jbd2/transaction.c:2079
 __jbd2_journal_unfile_buffer fs/jbd2/transaction.c:2093 [inline]
 __jbd2_journal_refile_buffer+0x1eb/0x230 fs/jbd2/transaction.c:2601
 jbd2_journal_commit_transaction+0x2527/0x33d0 fs/jbd2/commit.c:1041
 kjournald2+0x243/0x430 fs/jbd2/journal.c:201
 kthread+0x1d1/0x210 kernel/kthread.c:388
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

read to 0xffff888117395770 of 8 bytes by task 4388 on cpu 0:
 mem_cgroup_track_foreign_dirty_slowpath+0xdb/0x440 mm/memcontrol.c:4890
 mem_cgroup_track_foreign_dirty include/linux/memcontrol.h:1730 [inline]
 folio_account_dirtied mm/page-writeback.c:2683 [inline]
 __folio_mark_dirty+0x403/0x4e0 mm/page-writeback.c:2723
 mark_buffer_dirty+0x148/0x250 fs/buffer.c:1200
 __block_commit_write fs/buffer.c:2177 [inline]
 block_write_end+0x158/0x2e0 fs/buffer.c:2253
 ext4_write_end+0x177/0x820 fs/ext4/inode.c:1289
 ext4_da_write_end+0xaa/0x860 fs/ext4/inode.c:3014
 generic_perform_write+0x276/0x410 mm/filemap.c:3985
 ext4_buffered_write_iter+0x1f6/0x380 fs/ext4/file.c:299
 ext4_file_write_iter+0x29f/0xe30
 call_write_iter include/linux/fs.h:2110 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x771/0x8e0 fs/read_write.c:590
 ksys_write+0xeb/0x1b0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:652
 x64_sys_call+0x27b7/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000ffff9919 -> 0x00000000ffff99ee

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 4388 Comm: syz-executor.2 Not tainted 6.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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