syzbot |
sign-in | mailing list | source | docs |
============================= WARNING: suspicious RCU usage 5.13.0-rc1-syzkaller #0 Not tainted ----------------------------- kernel/sched/core.c:8304 Illegal context switch in RCU-sched read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 0 4 locks held by agetty/8138: #0: ffff888028e5e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffff888028e5e2e8 ( &tty->termios_rwsem ){++++}-{3:3} , at: n_tty_receive_buf_common+0x89/0x2bc0 drivers/tty/n_tty.c:1703 #2: ffffc90000fb8378 ( &ldata->output_lock ){+.+.}-{3:3} , at: flush_echoes drivers/tty/n_tty.c:824 [inline] , at: __receive_buf drivers/tty/n_tty.c:1645 [inline] , at: n_tty_receive_buf_common+0xb49/0x2bc0 drivers/tty/n_tty.c:1740 #3: ffffffff8bf68300 (console_lock){+.+.}-{0:0} , at: do_con_write+0x10f/0x1e60 drivers/tty/vt/vt.c:2868 stack backtrace: CPU: 0 PID: 8138 Comm: agetty Not tainted 5.13.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 ___might_sleep+0x266/0x2c0 kernel/sched/core.c:8304 console_conditional_schedule+0x37/0x50 kernel/printk/printk.c:2687 fbcon_redraw.constprop.0+0x1aa/0x4b0 drivers/video/fbdev/core/fbcon.c:1667 fbcon_scroll+0x1d7a/0x3580 drivers/video/fbdev/core/fbcon.c:1782 con_scroll+0x5b9/0x6d0 drivers/tty/vt/vt.c:630 lf+0x26b/0x2c0 drivers/tty/vt/vt.c:1490 do_con_trol+0x20f/0x54c0 drivers/tty/vt/vt.c:2170 do_con_write+0xdbd/0x1e60 drivers/tty/vt/vt.c:2911 con_write+0x21/0x40 drivers/tty/vt/vt.c:3255 do_output_char+0x5de/0x850 drivers/tty/n_tty.c:444 __process_echoes+0x38e/0x9f0 drivers/tty/n_tty.c:736 flush_echoes drivers/tty/n_tty.c:826 [inline] __receive_buf drivers/tty/n_tty.c:1645 [inline] n_tty_receive_buf_common+0xb88/0x2bc0 drivers/tty/n_tty.c:1740 tiocsti drivers/tty/tty_io.c:2315 [inline] tty_ioctl+0x8db/0x1600 drivers/tty/tty_io.c:2721 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:1069 [inline] __se_sys_ioctl fs/ioctl.c:1055 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f1747641017 Code: 00 00 00 48 8b 05 81 7e 2b 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 51 7e 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007fffaea23708 EFLAGS: 00000206 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fffaea23888 RCX: 00007f1747641017 RDX: 00007fffaea23887 RSI: 0000000000005412 RDI: 0000000000000000 RBP: 00007fffaea238cf R08: ffffffffffffff98 R09: 00007fffaea23780 R10: 0000000000000000 R11: 0000000000000206 R12: 00007fffaea23724 R13: 00007fffaea23880 R14: 00007fffaea23780 R15: 0000000000000000
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/05/15 18:15 | upstream | f36edc5533b2 | 93f844de | .config | console log | report | info | ci-upstream-kasan-gce-root | WARNING: suspicious RCU usage in console_conditional_schedule |