syzbot

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BUG: KCSAN: data-race in mem_cgroup_track_foreign_dirty_slowpath / mem_cgroup_track_foreign_dirty_slowpath

write to 0xffff888117f3d770 of 8 bytes by task 756 on cpu 0:
 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
 __ext4_handle_dirty_metadata+0x1fa/0x470 fs/ext4/ext4_jbd2.c:384
 ext4_quota_write+0x2a1/0x370 fs/ext4/super.c:7252
 v2_write_file_info+0x175/0x220 fs/quota/quota_v2.c:218
 dquot_commit_info+0x3f/0x50 fs/quota/dquot.c:2176
 ext4_write_info+0x79/0xb0 fs/ext4/super.c:6937
 dquot_set_dqinfo+0x29f/0x2c0 fs/quota/dquot.c:2898
 quota_setinfo+0x1ef/0x200 fs/quota/quota.c:174
 do_quotactl+0x4ea/0x6d0 fs/quota/quota.c:796
 __do_sys_quotactl_fd fs/quota/quota.c:1002 [inline]
 __se_sys_quotactl_fd+0x278/0x410 fs/quota/quota.c:973
 __x64_sys_quotactl_fd+0x55/0x70 fs/quota/quota.c:973
 x64_sys_call+0x2721/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:444
 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

read to 0xffff888117f3d770 of 8 bytes by task 749 on cpu 1:
 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_da_do_write_end fs/ext4/inode.c:2955 [inline]
 ext4_da_write_end+0x1ad/0x860 fs/ext4/inode.c:3028
 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
 __kernel_write_iter+0x265/0x490 fs/read_write.c:523
 dump_emit_page fs/coredump.c:890 [inline]
 dump_user_range+0x3a7/0x550 fs/coredump.c:951
 elf_core_dump+0x1aa6/0x1bc0 fs/binfmt_elf.c:2077
 do_coredump+0x1033/0x1890 fs/coredump.c:764
 get_signal+0xdc1/0x1080 kernel/signal.c:2896
 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 irqentry_exit_to_user_mode+0x94/0x130 kernel/entry/common.c:231
 irqentry_exit+0x12/0x50 kernel/entry/common.c:334
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

value changed: 0x000000010001767b -> 0x00000001000176e6

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 749 Comm: syz-executor.4 Tainted: G        W          6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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