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================================================================== BUG: KCSAN: data-race in __process_echoes / n_tty_write write to 0xffffc90000eaf280 of 8 bytes by task 17618 on cpu 0: __process_echoes+0x5db/0x620 drivers/tty/n_tty.c:756 flush_echoes drivers/tty/n_tty.c:817 [inline] __receive_buf drivers/tty/n_tty.c:1615 [inline] n_tty_receive_buf_common+0x8ff/0xb50 drivers/tty/n_tty.c:1711 n_tty_receive_buf2+0x32/0x40 drivers/tty/n_tty.c:1746 tty_ldisc_receive_buf+0x60/0xe0 drivers/tty/tty_buffer.c:457 tty_port_default_receive_buf+0x58/0x80 drivers/tty/tty_port.c:39 receive_buf drivers/tty/tty_buffer.c:515 [inline] flush_to_ldisc+0x1ca/0x400 drivers/tty/tty_buffer.c:565 process_one_work+0x3e6/0x750 kernel/workqueue.c:2390 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2537 kthread+0x1a6/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 read to 0xffffc90000eaf280 of 8 bytes by task 20399 on cpu 1: process_echoes drivers/tty/n_tty.c:794 [inline] n_tty_write+0x166/0xa80 drivers/tty/n_tty.c:2336 do_tty_write drivers/tty/tty_io.c:1018 [inline] file_tty_write+0x3a0/0x600 drivers/tty/tty_io.c:1089 tty_write+0x28/0x30 drivers/tty/tty_io.c:1110 call_write_iter include/linux/fs.h:1851 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x463/0x760 fs/read_write.c:584 ksys_write+0xeb/0x1a0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x42/0x50 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x000000000000005e -> 0x0000000000000064 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 20399 Comm: syz-executor.3 Not tainted 6.3.0-rc6-syzkaller-00138-g44149752e998 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2023/04/14 15:40 | upstream | 44149752e998 | ec410564 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in __process_echoes / n_tty_write | ||
2023/03/28 08:47 | upstream | 3a93e40326c8 | 47f3aaf1 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __process_echoes / n_tty_write | |||
2023/02/20 17:20 | upstream | c9c3395d5e3d | bcdf85f8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in __process_echoes / n_tty_write |