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================================================================== BUG: KCSAN: data-race in get_signal / io_req_task_work_add write to 0xffff888136bea0ec of 4 bytes by task 4521 on cpu 0: get_signal+0xe96/0x15d0 kernel/signal.c:2753 arch_do_signal_or_restart+0x2a/0x220 arch/x86/kernel/signal.c:789 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x104/0x170 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301 do_syscall_64+0x40/0x50 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888136bea0ec of 4 bytes by task 4524 on cpu 1: io_req_task_work_add+0x2c/0x320 fs/io_uring.c:1909 io_req_task_queue fs/io_uring.c:2019 [inline] __io_queue_deferred fs/io_uring.c:1275 [inline] io_commit_cqring+0x5dc/0x630 fs/io_uring.c:1324 io_req_complete_post+0x2df/0x570 fs/io_uring.c:1555 __io_req_complete fs/io_uring.c:1579 [inline] __io_complete_rw+0x3a0/0x430 fs/io_uring.c:2522 io_complete_rw+0x1b/0x20 fs/io_uring.c:2529 io_rw_done fs/io_uring.c:2756 [inline] kiocb_done+0x1d3/0x8d0 fs/io_uring.c:2780 io_read fs/io_uring.c:3359 [inline] io_issue_sqe+0x410a/0x6080 fs/io_uring.c:6056 io_wq_submit_work+0x112/0x300 fs/io_uring.c:6193 io_worker_handle_work+0xbbb/0xe20 fs/io-wq.c:451 io_wqe_worker+0x1e5/0x580 fs/io-wq.c:501 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 4524 Comm: iou-wrk-4521 Not tainted 5.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/04/17 16:47 | upstream | 9cdbf6467424 | 7e2b734b | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in get_signal / io_req_task_work_add |