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IPVS: ftp: loaded support on port[0] = 21 ====================================================== WARNING: possible circular locking dependency detected 4.14.303-syzkaller #0 Not tainted ------------------------------------------------------ swapper/1/0 is trying to acquire lock: (&(&gsm->tx_lock)->rlock){-...}, at: [<ffffffff8357517e>] gsmld_write_wakeup+0x4e/0xd0 drivers/tty/n_gsm.c:2490 but task is already holding lock: (&port_lock_key){-.-.}, at: [<ffffffff835caa20>] serial8250_handle_irq.part.0+0x20/0x390 drivers/tty/serial/8250/8250_port.c:1894 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&port_lock_key){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 uart_write_room+0xd5/0x340 drivers/tty/serial/serial_core.c:643 tty_write_room+0x61/0x80 drivers/tty/tty_ioctl.c:78 gsmld_write+0x69/0x120 drivers/tty/n_gsm.c:2546 do_tty_write drivers/tty/tty_io.c:959 [inline] tty_write+0x410/0x740 drivers/tty/tty_io.c:1043 __vfs_write+0xe4/0x630 fs/read_write.c:480 __kernel_write+0xf5/0x330 fs/read_write.c:501 write_pipe_buf+0x143/0x1c0 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x326/0x7a0 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] default_file_splice_write+0xc5/0x150 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1018 splice_direct_to_actor+0x27c/0x730 fs/splice.c:973 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> #0 (&(&gsm->tx_lock)->rlock){-...}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 gsmld_write_wakeup+0x4e/0xd0 drivers/tty/n_gsm.c:2490 tty_wakeup+0xc3/0xf0 drivers/tty/tty_io.c:533 tty_port_default_wakeup+0x26/0x40 drivers/tty/tty_port.c:49 serial8250_tx_chars+0x3fe/0xc70 drivers/tty/serial/8250/8250_port.c:1828 serial8250_handle_irq.part.0+0x2c7/0x390 drivers/tty/serial/8250/8250_port.c:1918 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1891 [inline] serial8250_default_handle_irq+0x8a/0x1f0 drivers/tty/serial/8250/8250_port.c:1934 serial8250_interrupt+0xf3/0x210 drivers/tty/serial/8250/8250_core.c:129 __handle_irq_event_percpu+0xee/0x7f0 kernel/irq/handle.c:147 handle_irq_event_percpu kernel/irq/handle.c:187 [inline] handle_irq_event+0xed/0x240 kernel/irq/handle.c:204 handle_edge_irq+0x224/0xc40 kernel/irq/chip.c:770 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x35/0x50 arch/x86/kernel/irq_64.c:87 do_IRQ+0x93/0x1d0 arch/x86/kernel/irq.c:230 ret_from_intr+0x0/0x1e native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0x47/0x370 arch/x86/kernel/process.c:558 cpuidle_idle_call kernel/sched/idle.c:156 [inline] do_idle+0x250/0x3c0 kernel/sched/idle.c:246 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:351 start_secondary+0x4db/0x670 arch/x86/kernel/smpboot.c:272 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&port_lock_key); lock(&(&gsm->tx_lock)->rlock); lock(&port_lock_key); lock(&(&gsm->tx_lock)->rlock); *** DEADLOCK *** 3 locks held by swapper/1/0: #0: (&(&i->lock)->rlock){-.-.}, at: [<ffffffff835b7daa>] spin_lock include/linux/spinlock.h:317 [inline] #0: (&(&i->lock)->rlock){-.-.}, at: [<ffffffff835b7daa>] serial8250_interrupt+0x3a/0x210 drivers/tty/serial/8250/8250_core.c:119 #1: (&port_lock_key){-.-.}, at: [<ffffffff835caa20>] serial8250_handle_irq.part.0+0x20/0x390 drivers/tty/serial/8250/8250_port.c:1894 #2: (&tty->ldisc_sem){++++}, at: [<ffffffff8355cfab>] tty_ldisc_ref+0x1b/0x80 drivers/tty/tty_ldisc.c:305 stack backtrace: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.14.303-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 gsmld_write_wakeup+0x4e/0xd0 drivers/tty/n_gsm.c:2490 tty_wakeup+0xc3/0xf0 drivers/tty/tty_io.c:533 tty_port_default_wakeup+0x26/0x40 drivers/tty/tty_port.c:49 serial8250_tx_chars+0x3fe/0xc70 drivers/tty/serial/8250/8250_port.c:1828 serial8250_handle_irq.part.0+0x2c7/0x390 drivers/tty/serial/8250/8250_port.c:1918 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1891 [inline] serial8250_default_handle_irq+0x8a/0x1f0 drivers/tty/serial/8250/8250_port.c:1934 serial8250_interrupt+0xf3/0x210 drivers/tty/serial/8250/8250_core.c:129 __handle_irq_event_percpu+0xee/0x7f0 kernel/irq/handle.c:147 handle_irq_event_percpu kernel/irq/handle.c:187 [inline] handle_irq_event+0xed/0x240 kernel/irq/handle.c:204 handle_edge_irq+0x224/0xc40 kernel/irq/chip.c:770 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x35/0x50 arch/x86/kernel/irq_64.c:87 do_IRQ+0x93/0x1d0 arch/x86/kernel/irq.c:230 common_interrupt+0x93/0x93 arch/x86/entry/entry_64.S:578 </IRQ> RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 RSP: 0018:ffff8880b5477e68 EFLAGS: 000002c6 ORIG_RAX: ffffffffffffffc8 RAX: 1ffffffff11e13dc RBX: dffffc0000000000 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880b5464bc4 RBP: ffffffff88f09ed0 R08: ffffffff88ccbd68 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffed1016a8c868 R13: ffff8880b5464340 R14: 0000000000000000 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0x47/0x370 arch/x86/kernel/process.c:558 cpuidle_idle_call kernel/sched/idle.c:156 [inline] do_idle+0x250/0x3c0 kernel/sched/idle.c:246 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:351 start_secondary+0x4db/0x670 arch/x86/kernel/smpboot.c:272 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2023/01/23 03:19 | linux-4.14.y | 97205fccccdc | cc0f9968 | .config | console log | report | syz | C | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | |
2022/09/04 01:45 | linux-4.14.y | e548869f356f | 28811d0a | .config | console log | report | syz | C | [disk image] [vmlinux] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | |
2023/02/03 14:35 | linux-4.14.y | 3949d1610004 | 1b2f701a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2023/02/03 13:14 | linux-4.14.y | 3949d1610004 | 1b2f701a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2023/02/02 21:08 | linux-4.14.y | 3949d1610004 | 16d19e30 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2023/02/02 16:20 | linux-4.14.y | 3949d1610004 | 16d19e30 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2023/02/01 15:58 | linux-4.14.y | 3949d1610004 | 9a6f477c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2023/01/30 14:43 | linux-4.14.y | 3949d1610004 | b68fb8d6 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2023/01/30 06:40 | linux-4.14.y | 3949d1610004 | 9dfcf09c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2023/01/24 09:07 | linux-4.14.y | 3949d1610004 | 9dfcf09c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2023/01/23 22:03 | linux-4.14.y | 97205fccccdc | 9dfcf09c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2023/01/23 18:06 | linux-4.14.y | 97205fccccdc | 9dfcf09c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2023/01/23 03:14 | linux-4.14.y | 97205fccccdc | cc0f9968 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2023/01/23 03:05 | linux-4.14.y | 97205fccccdc | cc0f9968 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2022/11/09 05:51 | linux-4.14.y | a901bb6c7db7 | 5fa28208 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2022/11/09 03:10 | linux-4.14.y | a901bb6c7db7 | 5fa28208 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2022/11/08 15:01 | linux-4.14.y | a901bb6c7db7 | 060f945e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2022/11/08 01:00 | linux-4.14.y | a901bb6c7db7 | 6feb842b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2022/09/12 20:22 | linux-4.14.y | 65640c873dcf | f371ed7e | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2022/09/11 18:09 | linux-4.14.y | 65640c873dcf | 356d8217 | .config | console log | report | info | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | |||
2022/09/11 04:45 | linux-4.14.y | 65640c873dcf | 356d8217 | .config | console log | report | info | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | |||
2022/09/10 03:02 | linux-4.14.y | 65640c873dcf | 356d8217 | .config | console log | report | info | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | |||
2022/09/09 23:02 | linux-4.14.y | 65640c873dcf | 356d8217 | .config | console log | report | info | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | |||
2022/09/09 14:13 | linux-4.14.y | 65640c873dcf | 90058bdc | .config | console log | report | info | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | |||
2022/09/09 11:27 | linux-4.14.y | 65640c873dcf | 90058bdc | .config | console log | report | info | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | |||
2022/09/08 14:21 | linux-4.14.y | 65640c873dcf | f3027468 | .config | console log | report | info | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | |||
2022/09/08 11:33 | linux-4.14.y | 65640c873dcf | f3027468 | .config | console log | report | info | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | |||
2022/09/07 23:36 | linux-4.14.y | 65640c873dcf | 435aeef7 | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2022/09/07 11:40 | linux-4.14.y | 65640c873dcf | c5b7bc57 | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2022/09/07 01:18 | linux-4.14.y | 65640c873dcf | 5fc30c37 | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2022/09/06 11:25 | linux-4.14.y | 65640c873dcf | 65aea2b9 | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2022/09/06 04:15 | linux-4.14.y | 65640c873dcf | 9dcd38fc | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup | ||
2022/09/03 15:32 | linux-4.14.y | e548869f356f | 28811d0a | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-14 | possible deadlock in gsmld_write_wakeup |