syzbot |
sign-in | mailing list | source | docs |
================================================================== BUG: KCSAN: data-race in blk_mq_rq_ctx_init / bt_tags_for_each write to 0xffff888102691a20 of 4 bytes by task 2880 on cpu 0: blk_mq_rq_ctx_init+0x193/0x300 block/blk-mq.c:371 __blk_mq_alloc_requests+0x7ce/0x9e0 block/blk-mq.c:517 blk_mq_get_new_requests block/blk-mq.c:2872 [inline] blk_mq_submit_bio+0x468/0xd90 block/blk-mq.c:2970 __submit_bio+0x11c/0x350 block/blk-core.c:599 __submit_bio_noacct_mq block/blk-core.c:678 [inline] submit_bio_noacct_nocheck+0x449/0x5e0 block/blk-core.c:707 submit_bio_noacct+0x71c/0x8c0 block/blk-core.c:801 submit_bio+0xb7/0xc0 block/blk-core.c:834 iomap_dio_submit_bio fs/iomap/direct-io.c:80 [inline] iomap_dio_bio_iter+0xa50/0xbe0 fs/iomap/direct-io.c:417 __iomap_dio_rw+0x8db/0x1090 fs/iomap/direct-io.c:659 iomap_dio_rw+0x40/0x90 fs/iomap/direct-io.c:748 ext4_dio_write_iter fs/ext4/file.c:575 [inline] ext4_file_write_iter+0xa8a/0xe10 fs/ext4/file.c:694 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x48a/0x790 fs/read_write.c:584 ksys_write+0xeb/0x1a0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x42/0x50 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffff888102691a20 of 4 bytes by task 2878 on cpu 1: blk_mq_find_and_get_req block/blk-mq-tag.c:260 [inline] bt_tags_iter block/blk-mq-tag.c:356 [inline] __sbitmap_for_each_set include/linux/sbitmap.h:281 [inline] sbitmap_for_each_set include/linux/sbitmap.h:302 [inline] bt_tags_for_each+0x2e2/0x500 block/blk-mq-tag.c:391 __blk_mq_all_tag_iter block/blk-mq-tag.c:402 [inline] blk_mq_tagset_busy_iter+0x114/0x150 block/blk-mq-tag.c:446 scsi_host_busy+0x4f/0x80 drivers/scsi/hosts.c:604 scsi_host_queue_ready drivers/scsi/scsi_lib.c:1341 [inline] scsi_queue_rq+0x310/0x1a30 drivers/scsi/scsi_lib.c:1735 blk_mq_dispatch_rq_list+0x2d9/0x1090 block/blk-mq.c:2037 __blk_mq_sched_dispatch_requests+0x1ce/0xd20 block/blk-mq-sched.c:301 blk_mq_sched_dispatch_requests+0x99/0x100 block/blk-mq-sched.c:333 blk_mq_run_hw_queue+0x2a4/0x4c0 block/blk-mq.c:2252 blk_mq_flush_plug_list+0x7b6/0xdc0 block/blk-mq.c:2800 blk_add_rq_to_plug+0x108/0x3e0 block/blk-mq.c:1294 blk_mq_submit_bio+0x61a/0xd90 block/blk-mq.c:2996 __submit_bio+0x11c/0x350 block/blk-core.c:599 __submit_bio_noacct_mq block/blk-core.c:678 [inline] submit_bio_noacct_nocheck+0x4ad/0x5e0 block/blk-core.c:707 submit_bio_noacct+0x71c/0x8c0 block/blk-core.c:801 submit_bio+0xb7/0xc0 block/blk-core.c:834 iomap_dio_submit_bio fs/iomap/direct-io.c:80 [inline] iomap_dio_bio_iter+0xa50/0xbe0 fs/iomap/direct-io.c:417 __iomap_dio_rw+0x8db/0x1090 fs/iomap/direct-io.c:659 iomap_dio_rw+0x40/0x90 fs/iomap/direct-io.c:748 ext4_dio_write_iter fs/ext4/file.c:575 [inline] ext4_file_write_iter+0xa8a/0xe10 fs/ext4/file.c:694 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x48a/0x790 fs/read_write.c:584 ksys_write+0xeb/0x1a0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x42/0x50 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b value changed: 0x00001f6c -> 0xffffffff Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 2878 Comm: syz-executor.2 Not tainted 6.7.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2023/11/21 18:08 | upstream | 98b1cc82c4af | cb976f63 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in blk_mq_rq_ctx_init / bt_tags_for_each |