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================================================================== BUG: KCSAN: data-race in __stop_tty / do_con_write write to 0xffff8881360739bc of 1 bytes by task 30977 on cpu 1: __stop_tty+0x3e/0x80 drivers/tty/tty_io.c:768 n_tty_ioctl_helper+0x333/0x4c0 drivers/tty/tty_ioctl.c:876 n_tty_ioctl+0x102/0x200 drivers/tty/n_tty.c:2421 tty_ioctl+0xa8f/0x1120 drivers/tty/tty_io.c:2814 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:1069 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:1055 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:1055 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881360739bc of 1 bytes by task 30973 on cpu 0: do_con_write+0x1fc5/0x5d90 drivers/tty/vt/vt.c:2891 con_write+0x20/0x40 drivers/tty/vt/vt.c:3255 n_tty_write+0x39b/0xaf0 drivers/tty/n_tty.c:2311 do_tty_write drivers/tty/tty_io.c:1038 [inline] file_tty_write+0x409/0x660 drivers/tty/tty_io.c:1110 tty_write+0x24/0x30 drivers/tty/tty_io.c:1131 call_write_iter include/linux/fs.h:2114 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0x69d/0x770 fs/read_write.c:605 ksys_write+0xce/0x180 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:667 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 30973 Comm: syz-executor.0 Not tainted 5.14.0-rc7-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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/08/24 23:27 | upstream | 6e764bcd1cf7 | b599f2fc | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __stop_tty / do_con_write | |||
2021/07/25 09:33 | upstream | 7ffca2bb9d8b | 4d1b57d4 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __stop_tty / do_con_write | |||
2021/07/16 21:41 | upstream | d936eb238744 | f115ae98 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __stop_tty / do_con_write |