Title | Replies (including bot) | Last reply |
---|---|---|
possible deadlock in tty_port_close_start | 0 (2) | 2020/02/17 14:42 |
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Title | Replies (including bot) | Last reply |
---|---|---|
possible deadlock in tty_port_close_start | 0 (2) | 2020/02/17 14:42 |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
linux-4.19 | possible deadlock in tty_port_close_start | C | done | 47 | 928d | 1393d | 1/1 | fixed on 2021/06/15 21:27 | |
linux-4.14 | possible deadlock in tty_port_close_start | C | error | 49 | 449d | 1383d | 0/1 | upstream: reported C repro on 2020/02/15 19:33 |
====================================================== WARNING: possible circular locking dependency detected 5.11.0-rc7-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor895/9972 is trying to acquire lock: ffffffff8bc82ca0 (console_owner){....}-{0:0}, at: console_trylock_spinning kernel/printk/printk.c:1778 [inline] ffffffff8bc82ca0 (console_owner){....}-{0:0}, at: vprintk_emit+0x282/0x490 kernel/printk/printk.c:2091 but task is already holding lock: ffffffff906974f8 (&port->lock){-.-.}-{2:2}, at: tty_port_close_start.part.0+0x28/0x550 drivers/tty/tty_port.c:567 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&port->lock){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159 tty_port_tty_get+0x1f/0x100 drivers/tty/tty_port.c:288 tty_port_default_wakeup+0x11/0x40 drivers/tty/tty_port.c:47 serial8250_tx_chars+0x487/0xa80 drivers/tty/serial/8250/8250_port.c:1832 serial8250_handle_irq.part.0+0x328/0x3d0 drivers/tty/serial/8250/8250_port.c:1919 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1892 [inline] serial8250_default_handle_irq+0xb2/0x220 drivers/tty/serial/8250/8250_port.c:1935 serial8250_interrupt+0xfd/0x200 drivers/tty/serial/8250/8250_core.c:126 __handle_irq_event_percpu+0x303/0x8f0 kernel/irq/handle.c:156 handle_irq_event_percpu kernel/irq/handle.c:196 [inline] handle_irq_event+0x102/0x290 kernel/irq/handle.c:213 handle_edge_irq+0x25f/0xd00 kernel/irq/chip.c:819 asm_call_irq_on_stack+0xf/0x20 __run_irq_on_irqstack arch/x86/include/asm/irq_stack.h:48 [inline] run_irq_on_irqstack_cond arch/x86/include/asm/irq_stack.h:101 [inline] handle_irq arch/x86/kernel/irq.c:230 [inline] __common_interrupt arch/x86/kernel/irq.c:249 [inline] common_interrupt+0x120/0x200 arch/x86/kernel/irq.c:239 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:620 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x25/0x50 kernel/locking/spinlock.c:191 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] uart_write+0x30d/0x570 drivers/tty/serial/serial_core.c:615 do_output_char+0x5de/0x850 drivers/tty/n_tty.c:448 process_output drivers/tty/n_tty.c:515 [inline] n_tty_write+0x4c3/0xfd0 drivers/tty/n_tty.c:2344 do_tty_write drivers/tty/tty_io.c:961 [inline] file_tty_write.constprop.0+0x521/0x8f0 drivers/tty/tty_io.c:1048 redirected_tty_write+0xa1/0xc0 drivers/tty/tty_io.c:1055 call_write_iter include/linux/fs.h:1901 [inline] do_iter_readv_writev+0x46f/0x740 fs/read_write.c:740 do_iter_write+0x188/0x670 fs/read_write.c:866 vfs_writev+0x1aa/0x620 fs/read_write.c:939 do_writev+0x139/0x300 fs/read_write.c:982 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 -> #1 (&port_lock_key){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159 serial8250_console_write+0x880/0xa90 drivers/tty/serial/8250/8250_port.c:3292 call_console_drivers kernel/printk/printk.c:1856 [inline] console_unlock+0x841/0xbb0 kernel/printk/printk.c:2570 vprintk_emit+0x189/0x490 kernel/printk/printk.c:2092 vprintk_func+0x8d/0x1e0 kernel/printk/printk_safe.c:393 printk+0xba/0xed kernel/printk/printk.c:2140 register_console kernel/printk/printk.c:2921 [inline] register_console+0x5d1/0x800 kernel/printk/printk.c:2801 univ8250_console_init+0x3a/0x46 drivers/tty/serial/8250/8250_core.c:690 console_init+0x3c7/0x596 kernel/printk/printk.c:3021 start_kernel+0x2fc/0x48c init/main.c:989 secondary_startup_64_no_verify+0xb0/0xbb -> #0 (console_owner){....}-{0:0}: check_prev_add kernel/locking/lockdep.c:2868 [inline] check_prevs_add kernel/locking/lockdep.c:2993 [inline] validate_chain kernel/locking/lockdep.c:3608 [inline] __lock_acquire+0x2b26/0x54f0 kernel/locking/lockdep.c:4832 lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 console_trylock_spinning kernel/printk/printk.c:1799 [inline] vprintk_emit+0x2bf/0x490 kernel/printk/printk.c:2091 vprintk_func+0x8d/0x1e0 kernel/printk/printk_safe.c:393 printk+0xba/0xed kernel/printk/printk.c:2140 tty_port_close_start.part.0+0x503/0x550 drivers/tty/tty_port.c:569 tty_port_close_start drivers/tty/tty_port.c:641 [inline] tty_port_close+0x46/0x170 drivers/tty/tty_port.c:634 tty_release+0x45e/0x1210 drivers/tty/tty_io.c:1694 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x249/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 other info that might help us debug this: Chain exists of: console_owner --> &port_lock_key --> &port->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&port->lock); lock(&port_lock_key); lock(&port->lock); lock(console_owner); *** DEADLOCK *** 2 locks held by syz-executor895/9972: #0: ffff8880196361c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: tty_lock+0xbd/0x120 drivers/tty/tty_mutex.c:19 #1: ffffffff906974f8 (&port->lock){-.-.}-{2:2}, at: tty_port_close_start.part.0+0x28/0x550 drivers/tty/tty_port.c:567 stack backtrace: CPU: 1 PID: 9972 Comm: syz-executor895 Not tainted 5.11.0-rc7-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+0x107/0x163 lib/dump_stack.c:120 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2117 check_prev_add kernel/locking/lockdep.c:2868 [inline] check_prevs_add kernel/locking/lockdep.c:2993 [inline] validate_chain kernel/locking/lockdep.c:3608 [inline] __lock_acquire+0x2b26/0x54f0 kernel/locking/lockdep.c:4832 lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 console_trylock_spinning kernel/printk/printk.c:1799 [inline] vprintk_emit+0x2bf/0x490 kernel/printk/printk.c:2091 vprintk_func+0x8d/0x1e0 kernel/printk/printk_safe.c:393 printk+0xba/0xed kernel/printk/printk.c:2140 tty_port_close_start.part.0+0x503/0x550 drivers/tty/tty_port.c:569 tty_port_close_start drivers/tty/tty_port.c:641 [inline] tty_port_close+0x46/0x170 drivers/tty/tty_port.c:634 tty_release+0x45e/0x1210 drivers/tty/tty_io.c:1694 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x249/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x40a51b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffeb88b7090 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 000000000040a51b RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000000129ac R08: 0000000000000000 R09: 00007ffe00000001 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000004d04fc R13: 00007ffeb88b72e0 R14: 00000000004d04e0 R15: 00007ffeb88b7160
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/02/13 06:30 | upstream | dcc0b49040c7 | 98682e5e | .config | console log | report | syz | C | ci-upstream-kasan-gce-root | possible deadlock in tty_port_close_start | ||
2020/06/13 18:52 | upstream | 435faf5c218a | dbce178a | .config | console log | report | syz | C | ci-qemu-upstream | |||
2020/02/17 14:42 | upstream | 11a48a5a18c6 | 2b411596 | .config | console log | report | syz | C | ci-upstream-kasan-gce-root | |||
2021/04/23 22:43 | upstream | 18a3c5f7abfd | 17f0b706 | .config | console log | report | info | ci-upstream-kasan-gce-selinux-root | possible deadlock in tty_port_close_start | |||
2021/04/06 05:16 | upstream | 0a50438c8436 | 6a81331a | .config | console log | report | info | ci-upstream-kasan-gce-root | possible deadlock in tty_port_close_start | |||
2021/03/27 19:53 | upstream | 0f4498cef9f5 | a8529b82 | .config | console log | report | info | ci-upstream-kasan-gce-selinux-root | possible deadlock in tty_port_close_start | |||
2021/03/24 04:02 | upstream | 7acac4b3196c | e613994b | .config | console log | report | info | ci-upstream-kasan-gce-selinux-root | possible deadlock in tty_port_close_start | |||
2021/03/22 00:27 | upstream | 5ee96fa9dd78 | bea32f74 | .config | console log | report | info | ci-upstream-kasan-gce-root | possible deadlock in tty_port_close_start | |||
2021/03/14 03:54 | upstream | 88fe49249c99 | 4a003785 | .config | console log | report | info | ci-upstream-kasan-gce-root | possible deadlock in tty_port_close_start | |||
2021/03/10 05:50 | upstream | 144c79ef3353 | 26967e35 | .config | console log | report | info | ci-upstream-kasan-gce-root | possible deadlock in tty_port_close_start | |||
2021/03/07 09:34 | upstream | 280d542f6ffa | c599ed12 | .config | console log | report | info | ci-qemu-upstream | possible deadlock in tty_port_close_start | |||
2021/03/02 09:07 | upstream | fe07bfda2fb9 | 183afb6c | .config | console log | report | info | ci-upstream-kasan-gce-selinux-root | possible deadlock in tty_port_close_start | |||
2021/02/27 15:02 | upstream | 3fb6d0e00efc | 4c37c133 | .config | console log | report | info | ci-qemu-upstream | possible deadlock in tty_port_close_start | |||
2021/02/20 21:46 | upstream | f40ddce88593 | 3e5ed8b4 | .config | console log | report | info | ci-qemu-upstream | possible deadlock in tty_port_close_start | |||
2021/02/19 02:00 | upstream | f40ddce88593 | 14052202 | .config | console log | report | info | ci-qemu-upstream | possible deadlock in tty_port_close_start | |||
2021/02/15 01:34 | upstream | f40ddce88593 | 98682e5e | .config | console log | report | info | ci-qemu-upstream | possible deadlock in tty_port_close_start | |||
2021/02/03 16:58 | upstream | 3aaf0a27ffc2 | 624dad51 | .config | console log | report | info | ci-qemu-upstream | possible deadlock in tty_port_close_start | |||
2021/01/19 10:41 | upstream | 1e2a199f6ccd | 63631df1 | .config | console log | report | info | ci-upstream-kasan-gce-root | possible deadlock in tty_port_close_start | |||
2021/09/30 02:19 | upstream | bf152b0b41dc | be530f6c | .config | console log | report | info | ci-qemu2-arm32 | possible deadlock in tty_port_close_start | |||
2021/04/03 09:08 | upstream | 0a84c2e440f7 | 6a81331a | .config | console log | report | info | ci-qemu2-arm64 | possible deadlock in tty_port_close_start | |||
2021/02/09 03:08 | upstream | e0756cfc7d7c | 2bd9619f | .config | console log | report | info | ci-qemu-upstream-386 | possible deadlock in tty_port_close_start | |||
2021/04/06 08:14 | linux-next | 454c576c3f5e | 6a81331a | .config | console log | report | info | ci-upstream-linux-next-kasan-gce-root | possible deadlock in tty_port_close_start | |||
2021/03/31 12:22 | linux-next | 931294922e65 | 6a81331a | .config | console log | report | info | ci-upstream-linux-next-kasan-gce-root | possible deadlock in tty_port_close_start | |||
2021/01/12 15:26 | upstream | a0d54b4f5b21 | 2c1f2513 | .config | console log | report | info | ci-upstream-kasan-gce-root | ||||
2021/01/12 07:05 | upstream | a0d54b4f5b21 | 2c1f2513 | .config | console log | report | info | ci-upstream-kasan-gce-root | ||||
2021/01/11 15:48 | upstream | 7c53f6b671f4 | 2c1f2513 | .config | console log | report | info | ci-upstream-kasan-gce-root | ||||
2021/01/11 06:45 | upstream | 0653161f0fac | 2c1f2513 | .config | console log | report | info | ci-upstream-kasan-gce-root | ||||
2021/01/03 04:18 | upstream | 3516bd729358 | 79264ae3 | .config | console log | report | info | ci-upstream-kasan-gce-root | ||||
2020/12/03 17:10 | upstream | 34816d20f173 | e6b0d314 | .config | console log | report | info | ci-upstream-kasan-gce-root | ||||
2020/11/17 09:07 | upstream | 9c87c9f41245 | 1bf9a662 | .config | console log | report | info | ci-upstream-kasan-gce-root | ||||
2020/09/06 23:37 | upstream | dd9fb9bb3340 | abf9ba4f | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2020/08/20 10:50 | upstream | 7eac66d0456f | ed282a3a | .config | console log | report | ci-upstream-kasan-gce-selinux-root | |||||
2020/07/28 02:35 | upstream | 92ed30191993 | cb93dc6a | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2020/06/18 05:18 | upstream | 7ae77150d94d | b9f3810b | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2020/06/02 03:38 | upstream | 9bf9511e3d9f | a0331e89 | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2020/05/30 19:59 | upstream | 86852175b016 | 6f3e1c7c | .config | console log | report | ci-upstream-kasan-gce-selinux-root | |||||
2020/03/27 14:14 | upstream | f3e69428b5e2 | 7d95711b | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2020/02/28 13:35 | upstream | f8788d86ab28 | 59b57593 | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2020/02/12 23:17 | upstream | f2850dd5ee01 | 84f4fc8a | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2020/12/04 21:07 | linux-next | 0eedceafd3a6 | 20366b87 | .config | console log | report | info | ci-upstream-linux-next-kasan-gce-root | ||||
2020/09/01 01:50 | linux-next | b36c969764ab | d5a3ae1f | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2020/08/12 12:40 | linux-next | bc09acc9f224 | bb3e5fe6 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2020/02/20 00:52 | linux-next | 1d7f85df0f9c | b690a6e3 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root |