RDX: 00000000200000c0 RSI: 0000000000000014 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000080000002 R11: 0000000000000246 R12: 0000000000000015 R13: 00000000000005a5 R14: 00000000006fd818 R15: 000000000000002a ================================================================== BUG: KMSAN: uninit-value in ____rb_erase_color lib/rbtree.c:278 [inline] BUG: KMSAN: uninit-value in rb_erase+0x135f/0x2bf0 lib/rbtree.c:462 CPU: 0 PID: 1725 Comm: kworker/0:1H Not tainted 4.17.0-rc5+ #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: kblockd blk_mq_run_work_fn Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:113 kmsan_report+0x149/0x260 mm/kmsan/kmsan.c:1084 __msan_warning_32+0x6e/0xc0 mm/kmsan/kmsan_instr.c:686 ____rb_erase_color lib/rbtree.c:278 [inline] rb_erase+0x135f/0x2bf0 lib/rbtree.c:462 elv_rb_del+0xa3/0x130 block/elevator.c:364 deadline_del_rq_rb block/mq-deadline.c:102 [inline] deadline_remove_request+0x565/0x680 block/mq-deadline.c:118 deadline_move_request block/mq-deadline.c:175 [inline] __dd_dispatch_request block/mq-deadline.c:364 [inline] dd_dispatch_request+0x15d7/0x17d0 block/mq-deadline.c:386 blk_mq_do_dispatch_sched block/blk-mq-sched.c:108 [inline] blk_mq_sched_dispatch_requests+0x9fa/0x1990 block/blk-mq-sched.c:221 __blk_mq_run_hw_queue+0x3c3/0x460 block/blk-mq.c:1350 blk_mq_run_work_fn+0x9e/0xe0 block/blk-mq.c:1583 process_one_work+0x12c6/0x1f60 kernel/workqueue.c:2145 worker_thread+0x113c/0x24f0 kernel/workqueue.c:2279 kthread+0x4e3/0x6d0 kernel/kthread.c:241 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:412 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline] kmsan_save_stack mm/kmsan/kmsan.c:294 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:685 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:529 __write_once_size include/linux/compiler.h:224 [inline] __rb_insert lib/rbtree.c:227 [inline] rb_insert_color+0xeed/0x1300 lib/rbtree.c:452 elv_rb_add+0x267/0x310 block/elevator.c:357 deadline_add_rq_rb block/mq-deadline.c:91 [inline] dd_insert_request block/mq-deadline.c:505 [inline] dd_insert_requests+0x9e9/0x1180 block/mq-deadline.c:533 blk_mq_sched_insert_requests+0x1ff/0x340 block/blk-mq-sched.c:474 blk_mq_flush_plug_list+0xfaf/0xfd0 block/blk-mq.c:1705 blk_flush_plug_list+0x812/0x2110 block/blk-core.c:3689 blk_schedule_flush_plug include/linux/blkdev.h:1360 [inline] io_schedule_prepare kernel/sched/core.c:5141 [inline] io_schedule+0xd7/0x3f0 kernel/sched/core.c:5172 __wbt_wait block/blk-wbt.c:554 [inline] wbt_wait+0x866/0x1480 block/blk-wbt.c:601 blk_mq_make_request+0x561/0x24b0 block/blk-mq.c:1873 generic_make_request+0x73d/0x18f0 block/blk-core.c:2460 submit_bio+0x2e8/0x740 block/blk-core.c:2568 submit_bh_wbc+0xb3b/0xe00 fs/buffer.c:3081 __block_write_full_page+0x12ea/0x1e10 fs/buffer.c:1763 block_write_full_page+0x32c/0x440 fs/buffer.c:2949 blkdev_writepage+0x76/0x90 fs/block_dev.c:566 __writepage+0xc0/0x200 mm/page-writeback.c:2302 write_cache_pages+0x124e/0x1800 mm/page-writeback.c:2240 generic_writepages+0x10f/0x190 mm/page-writeback.c:2326 blkdev_writepages+0x67/0x80 fs/block_dev.c:1951 do_writepages+0x185/0x3c0 mm/page-writeback.c:2341 __filemap_fdatawrite_range+0x4b6/0x500 mm/filemap.c:445 __filemap_fdatawrite mm/filemap.c:453 [inline] filemap_fdatawrite mm/filemap.c:458 [inline] filemap_write_and_wait+0x25e/0x950 mm/filemap.c:617 __sync_blockdev fs/block_dev.c:448 [inline] sync_blockdev fs/block_dev.c:457 [inline] __blkdev_put+0x2ba/0xc80 fs/block_dev.c:1783 blkdev_put+0x435/0x570 fs/block_dev.c:1852 blkdev_close+0xa6/0xf0 fs/block_dev.c:1859 __fput+0x457/0xa10 fs/file_table.c:209 ____fput+0x37/0x40 fs/file_table.c:243 task_work_run+0x243/0x2c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x10e1/0x38d0 kernel/exit.c:867 do_group_exit+0x1a0/0x360 kernel/exit.c:970 __do_sys_exit_group+0x21/0x30 kernel/exit.c:981 __se_sys_exit_group+0x14/0x20 kernel/exit.c:979 __x64_sys_exit_group+0x4c/0x50 kernel/exit.c:979 do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline] kmsan_save_stack mm/kmsan/kmsan.c:294 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:685 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:529 __write_once_size include/linux/compiler.h:224 [inline] __rb_insert lib/rbtree.c:228 [inline] rb_insert_color+0xf16/0x1300 lib/rbtree.c:452 elv_rb_add+0x267/0x310 block/elevator.c:357 deadline_add_rq_rb block/mq-deadline.c:91 [inline] dd_insert_request block/mq-deadline.c:505 [inline] dd_insert_requests+0x9e9/0x1180 block/mq-deadline.c:533 blk_mq_sched_insert_requests+0x1ff/0x340 block/blk-mq-sched.c:474 blk_mq_flush_plug_list+0xfaf/0xfd0 block/blk-mq.c:1705 blk_flush_plug_list+0x812/0x2110 block/blk-core.c:3689 blk_schedule_flush_plug include/linux/blkdev.h:1360 [inline] io_schedule_prepare kernel/sched/core.c:5141 [inline] io_schedule+0xd7/0x3f0 kernel/sched/core.c:5172 __wbt_wait block/blk-wbt.c:554 [inline] wbt_wait+0x866/0x1480 block/blk-wbt.c:601 blk_mq_make_request+0x561/0x24b0 block/blk-mq.c:1873 generic_make_request+0x73d/0x18f0 block/blk-core.c:2460 submit_bio+0x2e8/0x740 block/blk-core.c:2568 submit_bh_wbc+0xb3b/0xe00 fs/buffer.c:3081 __block_write_full_page+0x12ea/0x1e10 fs/buffer.c:1763 block_write_full_page+0x32c/0x440 fs/buffer.c:2949 blkdev_writepage+0x76/0x90 fs/block_dev.c:566 __writepage+0xc0/0x200 mm/page-writeback.c:2302 write_cache_pages+0x124e/0x1800 mm/page-writeback.c:2240 generic_writepages+0x10f/0x190 mm/page-writeback.c:2326 blkdev_writepages+0x67/0x80 fs/block_dev.c:1951 do_writepages+0x185/0x3c0 mm/page-writeback.c:2341 __filemap_fdatawrite_range+0x4b6/0x500 mm/filemap.c:445 __filemap_fdatawrite mm/filemap.c:453 [inline] filemap_fdatawrite mm/filemap.c:458 [inline] filemap_write_and_wait+0x25e/0x950 mm/filemap.c:617 __sync_blockdev fs/block_dev.c:448 [inline] sync_blockdev fs/block_dev.c:457 [inline] __blkdev_put+0x2ba/0xc80 fs/block_dev.c:1783 blkdev_put+0x435/0x570 fs/block_dev.c:1852 blkdev_close+0xa6/0xf0 fs/block_dev.c:1859 __fput+0x457/0xa10 fs/file_table.c:209 ____fput+0x37/0x40 fs/file_table.c:243 task_work_run+0x243/0x2c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x10e1/0x38d0 kernel/exit.c:867 do_group_exit+0x1a0/0x360 kernel/exit.c:970 __do_sys_exit_group+0x21/0x30 kernel/exit.c:981 __se_sys_exit_group+0x14/0x20 kernel/exit.c:979 __x64_sys_exit_group+0x4c/0x50 kernel/exit.c:979 do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline] kmsan_save_stack mm/kmsan/kmsan.c:294 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:685 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:529 rb_link_node include/linux/rbtree.h:108 [inline] elv_rb_add+0x2b8/0x310 block/elevator.c:356 deadline_add_rq_rb block/mq-deadline.c:91 [inline] dd_insert_request block/mq-deadline.c:505 [inline] dd_insert_requests+0x9e9/0x1180 block/mq-deadline.c:533 blk_mq_sched_insert_requests+0x1ff/0x340 block/blk-mq-sched.c:474 blk_mq_flush_plug_list+0xfaf/0xfd0 block/blk-mq.c:1705 blk_flush_plug_list+0x812/0x2110 block/blk-core.c:3689 blk_schedule_flush_plug include/linux/blkdev.h:1360 [inline] io_schedule_prepare kernel/sched/core.c:5141 [inline] io_schedule+0xd7/0x3f0 kernel/sched/core.c:5172 __wbt_wait block/blk-wbt.c:554 [inline] wbt_wait+0x866/0x1480 block/blk-wbt.c:601 blk_mq_make_request+0x561/0x24b0 block/blk-mq.c:1873 generic_make_request+0x73d/0x18f0 block/blk-core.c:2460 submit_bio+0x2e8/0x740 block/blk-core.c:2568 submit_bh_wbc+0xb3b/0xe00 fs/buffer.c:3081 __block_write_full_page+0x12ea/0x1e10 fs/buffer.c:1763 block_write_full_page+0x32c/0x440 fs/buffer.c:2949 blkdev_writepage+0x76/0x90 fs/block_dev.c:566 __writepage+0xc0/0x200 mm/page-writeback.c:2302 write_cache_pages+0x124e/0x1800 mm/page-writeback.c:2240 generic_writepages+0x10f/0x190 mm/page-writeback.c:2326 blkdev_writepages+0x67/0x80 fs/block_dev.c:1951 do_writepages+0x185/0x3c0 mm/page-writeback.c:2341 __filemap_fdatawrite_range+0x4b6/0x500 mm/filemap.c:445 __filemap_fdatawrite mm/filemap.c:453 [inline] filemap_fdatawrite mm/filemap.c:458 [inline] filemap_write_and_wait+0x25e/0x950 mm/filemap.c:617 __sync_blockdev fs/block_dev.c:448 [inline] sync_blockdev fs/block_dev.c:457 [inline] __blkdev_put+0x2ba/0xc80 fs/block_dev.c:1783 blkdev_put+0x435/0x570 fs/block_dev.c:1852 blkdev_close+0xa6/0xf0 fs/block_dev.c:1859 __fput+0x457/0xa10 fs/file_table.c:209 ____fput+0x37/0x40 fs/file_table.c:243 task_work_run+0x243/0x2c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x10e1/0x38d0 kernel/exit.c:867 do_group_exit+0x1a0/0x360 kernel/exit.c:970 __do_sys_exit_group+0x21/0x30 kernel/exit.c:981 __se_sys_exit_group+0x14/0x20 kernel/exit.c:979 __x64_sys_exit_group+0x4c/0x50 kernel/exit.c:979 do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline] kmsan_save_stack mm/kmsan/kmsan.c:294 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:685 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:529 rb_link_node include/linux/rbtree.h:111 [inline] elv_rb_add+0x2ea/0x310 block/elevator.c:356 deadline_add_rq_rb block/mq-deadline.c:91 [inline] dd_insert_request block/mq-deadline.c:505 [inline] dd_insert_requests+0x9e9/0x1180 block/mq-deadline.c:533 blk_mq_sched_insert_requests+0x1ff/0x340 block/blk-mq-sched.c:474 blk_mq_flush_plug_list+0xfaf/0xfd0 block/blk-mq.c:1705 blk_flush_plug_list+0x812/0x2110 block/blk-core.c:3689 blk_schedule_flush_plug include/linux/blkdev.h:1360 [inline] io_schedule_prepare kernel/sched/core.c:5141 [inline] io_schedule+0xd7/0x3f0 kernel/sched/core.c:5172 __wbt_wait block/blk-wbt.c:554 [inline] wbt_wait+0x866/0x1480 block/blk-wbt.c:601 blk_mq_make_request+0x561/0x24b0 block/blk-mq.c:1873 generic_make_request+0x73d/0x18f0 block/blk-core.c:2460 submit_bio+0x2e8/0x740 block/blk-core.c:2568 submit_bh_wbc+0xb3b/0xe00 fs/buffer.c:3081 __block_write_full_page+0x12ea/0x1e10 fs/buffer.c:1763 block_write_full_page+0x32c/0x440 fs/buffer.c:2949 blkdev_writepage+0x76/0x90 fs/block_dev.c:566 __writepage+0xc0/0x200 mm/page-writeback.c:2302 write_cache_pages+0x124e/0x1800 mm/page-writeback.c:2240 generic_writepages+0x10f/0x190 mm/page-writeback.c:2326 blkdev_writepages+0x67/0x80 fs/block_dev.c:1951 do_writepages+0x185/0x3c0 mm/page-writeback.c:2341 __filemap_fdatawrite_range+0x4b6/0x500 mm/filemap.c:445 __filemap_fdatawrite mm/filemap.c:453 [inline] filemap_fdatawrite mm/filemap.c:458 [inline] filemap_write_and_wait+0x25e/0x950 mm/filemap.c:617 __sync_blockdev fs/block_dev.c:448 [inline] sync_blockdev fs/block_dev.c:457 [inline] __blkdev_put+0x2ba/0xc80 fs/block_dev.c:1783 blkdev_put+0x435/0x570 fs/block_dev.c:1852 blkdev_close+0xa6/0xf0 fs/block_dev.c:1859 __fput+0x457/0xa10 fs/file_table.c:209 ____fput+0x37/0x40 fs/file_table.c:243 task_work_run+0x243/0x2c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x10e1/0x38d0 kernel/exit.c:867 do_group_exit+0x1a0/0x360 kernel/exit.c:970 __do_sys_exit_group+0x21/0x30 kernel/exit.c:981 __se_sys_exit_group+0x14/0x20 kernel/exit.c:979 __x64_sys_exit_group+0x4c/0x50 kernel/exit.c:979 do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Local variable description: ----ctx_list@blk_mq_flush_plug_list Variable was created at: blk_mq_flush_plug_list+0xb0/0xfd0 block/blk-mq.c:1662 blk_flush_plug_list+0x812/0x2110 block/blk-core.c:3689 ==================================================================