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================================================================== BUG: KCSAN: data-race in n_hdlc_buf_get / n_hdlc_tty_receive write to 0xffff8881200a2e48 of 4 bytes by task 12903 on cpu 0: n_hdlc_buf_get+0x132/0x180 drivers/tty/n_hdlc.c:934 flush_rx_queue+0x50/0x70 drivers/tty/n_hdlc.c:199 tty_ldisc_hangup+0x5e/0x340 drivers/tty/tty_ldisc.c:726 __tty_hangup+0x2cb/0x440 drivers/tty/tty_io.c:625 tty_vhangup drivers/tty/tty_io.c:698 [inline] tty_ioctl+0x395/0xd80 drivers/tty/tty_io.c:2601 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+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8881200a2e48 of 4 bytes by task 654 on cpu 1: n_hdlc_tty_receive+0x1cf/0x2a0 drivers/tty/n_hdlc.c:524 tty_ldisc_receive_buf+0xde/0xe0 drivers/tty/tty_buffer.c:465 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:2264 worker_thread+0x9a/0x7e0 kernel/workqueue.c:2410 kthread+0x1cb/0x1f0 kernel/kthread.c:255 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 654 Comm: kworker/u4:4 Not tainted 5.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound flush_to_ldisc ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/03/09 05:02 | https://github.com/google/ktsan.git kcsan | 941e0d917bbf | 2e9971bb | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/01/19 17:27 | https://github.com/google/ktsan.git kcsan | 245a43005292 | 0342f8c7 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2019/12/19 01:25 | https://github.com/google/ktsan.git kcsan | 245a43005292 | 79b211f7 | .config | console log | report | ci2-upstream-kcsan-gce |