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================================================================== BUG: KCSAN: data-race in __stop_tty / n_tty_receive_char write to 0xffff88810387c1bc of 1 bytes by task 6913 on cpu 1: __stop_tty+0x36/0x90 drivers/tty/tty_io.c:744 n_tty_ioctl_helper+0x1e9/0x210 drivers/tty/tty_ioctl.c:951 n_tty_ioctl+0x101/0x200 drivers/tty/n_tty.c:2509 tty_ioctl+0x842/0xb80 drivers/tty/tty_io.c:2801 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:584 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:584 x64_sys_call+0x1816/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88810387c1bc of 1 bytes by task 278 on cpu 0: n_tty_receive_char+0x3d/0x6a0 drivers/tty/n_tty.c:1411 n_tty_receive_buf_standard+0x473/0x2f10 drivers/tty/n_tty.c:1590 __receive_buf drivers/tty/n_tty.c:1624 [inline] n_tty_receive_buf_common+0x805/0xbe0 drivers/tty/n_tty.c:1723 n_tty_receive_buf2+0x33/0x40 drivers/tty/n_tty.c:1769 tty_ldisc_receive_buf+0x63/0xf0 drivers/tty/tty_buffer.c:387 tty_port_default_receive_buf+0x59/0x90 drivers/tty/tty_port.c:37 receive_buf drivers/tty/tty_buffer.c:445 [inline] flush_to_ldisc+0x148/0x340 drivers/tty/tty_buffer.c:495 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0x4cb/0x9d0 kernel/workqueue.c:3319 worker_thread+0x582/0x770 kernel/workqueue.c:3400 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 278 Comm: kworker/u8:5 Not tainted 6.17.0-rc1-syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: events_unbound flush_to_ldisc ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/08/10 23:36 | upstream | 8f5ae30d69d7 | 32a0e5ed | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in __stop_tty / n_tty_receive_char | ||
2025/07/29 01:32 | upstream | 038d61fd6422 | 6654ea9c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in __stop_tty / n_tty_receive_char | ||
2025/06/23 22:27 | upstream | 86731a2a651e | e2f27c35 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in __stop_tty / n_tty_receive_char |