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BUG: KCSAN: data-race in __io_free_req_finish / __io_uring_files_cancel write to 0xffff8880752c3340 of 1 bytes by task 25276 on cpu 1: __io_uring_files_cancel+0x4c/0x190 fs/io_uring.c:8594 io_uring_files_cancel include/linux/io_uring.h:35 [inline] exit_files+0x6a/0xc0 fs/file.c:456 do_exit+0x696/0x1660 kernel/exit.c:801 do_group_exit+0xcb/0x180 kernel/exit.c:903 get_signal+0xe6f/0x15f0 kernel/signal.c:2757 arch_do_signal+0x25/0x270 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0x124/0x210 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:267 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880752c3340 of 1 bytes by task 25279 on cpu 0: __io_free_req_finish+0x57/0x1f0 fs/io_uring.c:1720 __io_free_req fs/io_uring.c:1749 [inline] io_free_req+0x7b/0xc0 fs/io_uring.c:2004 io_put_req fs/io_uring.c:2085 [inline] io_free_work+0x3c/0x80 fs/io_uring.c:7553 io_worker_handle_work+0xb58/0xd80 fs/io-wq.c:556 io_wqe_worker+0x212/0x830 fs/io-wq.c:590 kthread+0x20d/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 25279 Comm: io_wqe_worker-0 Not tainted 5.9.0-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 |
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2020/10/15 23:28 | upstream | 726eb70e0d34 | 6e262c73 | .config | console log | report | info | ci2-upstream-kcsan-gce |