sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code ====================================================== WARNING: possible circular locking dependency detected 4.14.304-syzkaller #0 Not tainted ------------------------------------------------------ kworker/u4:5/9288 is trying to acquire lock: (&(&gsm->tx_lock)->rlock){-...}, at: [] gsmld_write_wakeup+0x4e/0xd0 drivers/tty/n_gsm.c:2490 but task is already holding lock: (&port_lock_key){-.-.}, at: [] 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 arch_local_irq_enable arch/x86/include/asm/paravirt.h:789 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:200 spin_unlock_irq include/linux/spinlock.h:367 [inline] process_one_work+0x6c4/0x14a0 kernel/workqueue.c:2090 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 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 kworker/u4:5/9288: #0: (&(&i->lock)->rlock){-.-.}, at: [] spin_lock include/linux/spinlock.h:317 [inline] #0: (&(&i->lock)->rlock){-.-.}, at: [] serial8250_interrupt+0x3a/0x210 drivers/tty/serial/8250/8250_core.c:119 #1: (&port_lock_key){-.-.}, at: [] serial8250_handle_irq.part.0+0x20/0x390 drivers/tty/serial/8250/8250_port.c:1894 #2: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref+0x1b/0x80 drivers/tty/tty_ldisc.c:305 stack backtrace: CPU: 1 PID: 9288 Comm: kworker/u4:5 Not tainted 4.14.304-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: bat_events batadv_nc_worker Call Trace: __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 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:200 RSP: 0018:ffff888067a27d58 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffc8 RAX: 1ffffffff11e13db RBX: ffff88813fe46910 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff888067a18c04 RBP: ffff88813fe468c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888095e0ae00 R13: ffff8880a30cc600 R14: ffff88813fe468c0 R15: ffff8880a5f88000 spin_unlock_irq include/linux/spinlock.h:367 [inline] process_one_work+0x6c4/0x14a0 kernel/workqueue.c:2090 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal REISERFS (device loop4): using ordered data mode sd 0:0:1:0: Add. Sense: Invalid command operation code reiserfs: using flush barriers REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop4): Using r5 hash to sort names sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. sd 0:0:1:0: Add. Sense: Invalid command operation code audit: type=1800 audit(1674551243.670:9): pid=11313 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="loop4" ino=4 res=0 REISERFS (device loop1): found reiserfs format "3.6" with non-standard journal sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] REISERFS (device loop1): using ordered data mode sd 0:0:1:0: Add. Sense: Invalid command operation code REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal reiserfs: using flush barriers REISERFS (device loop4): using ordered data mode REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 reiserfs: using flush barriers REISERFS (device loop1): checking transaction log (loop1) REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop1): Using r5 hash to sort names REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. audit: type=1800 audit(1674551244.280:10): pid=11381 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="loop4" ino=4 res=0 audit: type=1800 audit(1674551244.330:11): pid=11369 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="loop1" ino=4 res=0 REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal REISERFS (device loop1): found reiserfs format "3.6" with non-standard journal REISERFS (device loop1): using ordered data mode REISERFS (device loop4): using ordered data mode reiserfs: using flush barriers REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 reiserfs: using flush barriers REISERFS (device loop1): checking transaction log (loop1) REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop1): Using r5 hash to sort names REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. audit: type=1800 audit(1674551245.020:12): pid=11427 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="loop1" ino=4 res=0 REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. audit: type=1800 audit(1674551245.100:13): pid=11430 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="loop4" ino=4 res=0 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount REISERFS (device loop1): found reiserfs format "3.6" with non-standard journal REISERFS (device loop1): using ordered data mode syz-executor.5 (11429) used greatest stack depth: 24464 bytes left reiserfs: using flush barriers REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop1): checking transaction log (loop1) XFS (loop5): Unmounting Filesystem REISERFS (device loop1): Using r5 hash to sort names REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal REISERFS (device loop4): using ordered data mode reiserfs: using flush barriers audit: type=1800 audit(1674551245.400:14): pid=11476 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="loop1" ino=4 res=0 REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. audit: type=1800 audit(1674551245.750:15): pid=11490 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="loop4" ino=4 res=0 XFS (loop2): Mounting V4 Filesystem XFS (loop5): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop5): Ending clean mount XFS (loop2): Unmounting Filesystem XFS (loop3): Mounting V4 Filesystem XFS (loop5): Unmounting Filesystem XFS (loop3): Ending clean mount bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state syz-executor.3 (11510) used greatest stack depth: 24040 bytes left XFS (loop3): Unmounting Filesystem batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 XFS (loop1): Mounting V4 Filesystem XFS (loop1): Ending clean mount XFS (loop1): Unmounting Filesystem XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount XFS (loop5): Unmounting Filesystem XFS (loop3): Mounting V4 Filesystem XFS (loop2): Mounting V4 Filesystem XFS (loop3): Ending clean mount XFS (loop2): Ending clean mount XFS (loop2): Unmounting Filesystem XFS (loop3): Unmounting Filesystem XFS (loop1): Mounting V4 Filesystem XFS (loop1): Ending clean mount XFS (loop1): Unmounting Filesystem XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount XFS (loop5): Unmounting Filesystem XFS (loop2): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop3): Mounting V4 Filesystem XFS (loop2): Unmounting Filesystem XFS (loop3): Ending clean mount