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================================================================== BUG: KCSAN: data-race in __start_tty.part.0 / n_tty_receive_buf_common read to 0xffff8880808495d4 of 1 bytes by task 11332 on cpu 0: n_tty_receive_char_fast drivers/tty/n_tty.c:1439 [inline] n_tty_receive_buf_fast drivers/tty/n_tty.c:1609 [inline] __receive_buf drivers/tty/n_tty.c:1644 [inline] n_tty_receive_buf_common+0x14f6/0x1a40 drivers/tty/n_tty.c:1742 n_tty_receive_buf2+0x39/0x50 drivers/tty/n_tty.c:1777 tty_ldisc_receive_buf+0x69/0xe0 drivers/tty/tty_buffer.c:461 tty_port_default_receive_buf+0x82/0xd0 drivers/tty/tty_port.c:38 receive_buf drivers/tty/tty_buffer.c:481 [inline] flush_to_ldisc+0x1dd/0x260 drivers/tty/tty_buffer.c:533 process_one_work+0x424/0x930 kernel/workqueue.c:2268 worker_thread+0x9a/0x7e0 kernel/workqueue.c:2414 kthread+0x203/0x230 kernel/kthread.c:268 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 write to 0xffff8880808495d4 of 12 bytes by task 1337 on cpu 1: __start_tty.part.0+0x25/0x70 drivers/tty/tty_io.c:805 __start_tty drivers/tty/tty_io.c:803 [inline] start_tty+0x5e/0x80 drivers/tty/tty_io.c:816 n_tty_receive_signal_char+0xc8/0xd0 drivers/tty/n_tty.c:1245 n_tty_receive_char_special+0xe76/0x1bc0 drivers/tty/n_tty.c:1289 n_tty_receive_buf_fast drivers/tty/n_tty.c:1610 [inline] __receive_buf drivers/tty/n_tty.c:1644 [inline] n_tty_receive_buf_common+0x17d6/0x1a40 drivers/tty/n_tty.c:1742 n_tty_receive_buf+0x36/0x50 drivers/tty/n_tty.c:1771 tiocsti drivers/tty/tty_io.c:2196 [inline] tty_ioctl+0xaf4/0xd80 drivers/tty/tty_io.c:2572 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x101/0x150 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x47/0x60 fs/ioctl.c:770 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 1337 Comm: syz-executor.0 Not tainted 5.7.0-rc1-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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/06/04 03:32 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | b0d1c0d5 | .config | console log | report | ci2-upstream-kcsan-gce |