===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted ----------------------------------------------------- syz-executor.2/6263 [HC0[0]:SC0[2]:HE0:SE0] is trying to acquire: ffff88802a2bb820 (&htab->buckets[i].lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] ffff88802a2bb820 (&htab->buckets[i].lock){+.-.}-{2:2}, at: sock_hash_delete_elem+0xcb/0x260 net/core/sock_map.c:939 and this task is already holding: ffff88807d879958 (&port->lock){-.-.}-{2:2}, at: tty_insert_flip_string_and_push_buffer+0x7f/0x1f0 drivers/tty/tty_buffer.c:557 which would create a new lock dependency: (&port->lock){-.-.}-{2:2} -> (&htab->buckets[i].lock){+.-.}-{2:2} but this new dependency connects a HARDIRQ-irq-safe lock: (&port->lock){-.-.}-{2:2} ... which became HARDIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 tty_port_tty_get+0x21/0x100 drivers/tty/tty_port.c:327 tty_port_default_wakeup+0x15/0x40 drivers/tty/tty_port.c:66 serial8250_tx_chars+0x55a/0x8b0 drivers/tty/serial/8250/8250_port.c:1835 serial8250_handle_irq+0x5d3/0x780 drivers/tty/serial/8250/8250_port.c:1942 serial8250_default_handle_irq+0x9a/0x210 drivers/tty/serial/8250/8250_port.c:1962 serial8250_interrupt+0x103/0x210 drivers/tty/serial/8250/8250_core.c:127 __handle_irq_event_percpu+0x229/0x750 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x263/0xd10 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0xde/0x250 arch/x86/kernel/irq.c:257 common_interrupt+0xab/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] uart_port_unlock_irqrestore include/linux/serial_core.h:667 [inline] serial_port_runtime_resume+0x2b7/0x340 drivers/tty/serial/serial_port.c:41 __rpm_callback+0xc5/0x4c0 drivers/base/power/runtime.c:394 rpm_callback+0x1da/0x220 drivers/base/power/runtime.c:448 rpm_resume+0xcf9/0x12f0 drivers/base/power/runtime.c:914 pm_runtime_work+0x10c/0x150 drivers/base/power/runtime.c:979 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 to a HARDIRQ-irq-unsafe lock: (&htab->buckets[i].lock){+.-.}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_update_common+0x1fe/0xa60 net/core/sock_map.c:1007 sock_map_update_elem_sys+0x280/0x570 net/core/sock_map.c:581 bpf_map_update_value+0x36c/0x6c0 kernel/bpf/syscall.c:172 map_update_elem+0x623/0x910 kernel/bpf/syscall.c:1641 __sys_bpf+0xab9/0x4b40 kernel/bpf/syscall.c:5619 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline] __se_sys_bpf kernel/bpf/syscall.c:5736 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5736 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&htab->buckets[i].lock); local_irq_disable(); lock(&port->lock); lock(&htab->buckets[i].lock); lock(&port->lock); *** DEADLOCK *** 6 locks held by syz-executor.2/6263: #0: ffff888058ae30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffff888058ae3130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:954 [inline] #1: ffff888058ae3130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: iterate_tty_write drivers/tty/tty_io.c:973 [inline] #1: ffff888058ae3130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x293/0x9b0 drivers/tty/tty_io.c:1096 #2: ffff888058ae32e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_write+0xd88/0x1150 drivers/tty/n_tty.c:2423 #3: ffffc900020c8380 (&ldata->output_lock){+.+.}-{3:3}, at: n_tty_write+0xaf7/0x1150 drivers/tty/n_tty.c:2400 #4: ffff88807d879958 (&port->lock){-.-.}-{2:2}, at: tty_insert_flip_string_and_push_buffer+0x7f/0x1f0 drivers/tty/tty_buffer.c:557 #5: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #5: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #5: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline] #5: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x107/0x460 kernel/trace/bpf_trace.c:2422 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&port->lock){-.-.}-{2:2} { IN-HARDIRQ-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 tty_port_tty_get+0x21/0x100 drivers/tty/tty_port.c:327 tty_port_default_wakeup+0x15/0x40 drivers/tty/tty_port.c:66 serial8250_tx_chars+0x55a/0x8b0 drivers/tty/serial/8250/8250_port.c:1835 serial8250_handle_irq+0x5d3/0x780 drivers/tty/serial/8250/8250_port.c:1942 serial8250_default_handle_irq+0x9a/0x210 drivers/tty/serial/8250/8250_port.c:1962 serial8250_interrupt+0x103/0x210 drivers/tty/serial/8250/8250_core.c:127 __handle_irq_event_percpu+0x229/0x750 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x263/0xd10 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0xde/0x250 arch/x86/kernel/irq.c:257 common_interrupt+0xab/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] uart_port_unlock_irqrestore include/linux/serial_core.h:667 [inline] serial_port_runtime_resume+0x2b7/0x340 drivers/tty/serial/serial_port.c:41 __rpm_callback+0xc5/0x4c0 drivers/base/power/runtime.c:394 rpm_callback+0x1da/0x220 drivers/base/power/runtime.c:448 rpm_resume+0xcf9/0x12f0 drivers/base/power/runtime.c:914 pm_runtime_work+0x10c/0x150 drivers/base/power/runtime.c:979 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 tty_port_tty_get+0x21/0x100 drivers/tty/tty_port.c:327 tty_port_default_wakeup+0x15/0x40 drivers/tty/tty_port.c:66 serial8250_tx_chars+0x55a/0x8b0 drivers/tty/serial/8250/8250_port.c:1835 serial8250_handle_irq+0x5d3/0x780 drivers/tty/serial/8250/8250_port.c:1942 serial8250_default_handle_irq+0x9a/0x210 drivers/tty/serial/8250/8250_port.c:1962 serial8250_interrupt+0x103/0x210 drivers/tty/serial/8250/8250_core.c:127 __handle_irq_event_percpu+0x229/0x750 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x263/0xd10 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0xde/0x250 arch/x86/kernel/irq.c:257 common_interrupt+0x52/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 variable_ffs arch/x86/include/asm/bitops.h:321 [inline] __do_softirq+0x1dc/0x8de kernel/softirq.c:542 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] uart_port_unlock_irqrestore include/linux/serial_core.h:667 [inline] serial_port_runtime_resume+0x2b7/0x340 drivers/tty/serial/serial_port.c:41 __rpm_callback+0xc5/0x4c0 drivers/base/power/runtime.c:394 rpm_callback+0x1da/0x220 drivers/base/power/runtime.c:448 rpm_resume+0xcf9/0x12f0 drivers/base/power/runtime.c:914 pm_runtime_work+0x10c/0x150 drivers/base/power/runtime.c:979 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:376 [inline] tty_port_open+0x2b/0x1f0 drivers/tty/tty_port.c:768 uart_open+0x41/0x60 drivers/tty/serial/serial_core.c:1982 tty_open+0x3fc/0x1020 drivers/tty/tty_io.c:2152 chrdev_open+0x26d/0x6f0 fs/char_dev.c:414 do_dentry_open+0x8da/0x18c0 fs/open.c:955 do_open fs/namei.c:3642 [inline] path_openat+0x1dfb/0x2990 fs/namei.c:3799 do_filp_open+0x1dc/0x430 fs/namei.c:3826 file_open_name+0x2a4/0x450 fs/open.c:1351 filp_open+0x4b/0x80 fs/open.c:1371 console_on_rootfs+0x1d/0x80 init/main.c:1508 kernel_init_freeable+0x6f5/0xc40 init/main.c:1555 kernel_init+0x1c/0x2a0 init/main.c:1439 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 } ... key at: [] __key.1+0x0/0x40 the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (&htab->buckets[i].lock){+.-.}-{2:2} { HARDIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_update_common+0x1fe/0xa60 net/core/sock_map.c:1007 sock_map_update_elem_sys+0x280/0x570 net/core/sock_map.c:581 bpf_map_update_value+0x36c/0x6c0 kernel/bpf/syscall.c:172 map_update_elem+0x623/0x910 kernel/bpf/syscall.c:1641 __sys_bpf+0xab9/0x4b40 kernel/bpf/syscall.c:5619 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline] __se_sys_bpf kernel/bpf/syscall.c:5736 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5736 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_delete_elem+0xcb/0x260 net/core/sock_map.c:939 ___bpf_prog_run+0x3e51/0xae80 kernel/bpf/core.c:1997 __bpf_prog_run32+0xc1/0x100 kernel/bpf/core.c:2236 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run4+0x176/0x460 kernel/trace/bpf_trace.c:2422 trace_mm_page_alloc include/trace/events/kmem.h:177 [inline] __alloc_pages+0x3ad/0x2410 mm/page_alloc.c:4591 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] page_frag_alloc_1k net/core/skbuff.c:250 [inline] __napi_alloc_skb+0x4d8/0x6f0 net/core/skbuff.c:834 napi_alloc_skb include/linux/skbuff.h:3363 [inline] page_to_skb+0x150/0xb00 drivers/net/virtio_net.c:569 receive_mergeable drivers/net/virtio_net.c:1683 [inline] receive_buf+0x118d/0x51f0 drivers/net/virtio_net.c:1804 virtnet_receive drivers/net/virtio_net.c:2110 [inline] virtnet_poll+0xa0b/0x1840 drivers/net/virtio_net.c:2203 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6632 napi_poll net/core/dev.c:6701 [inline] net_rx_action+0x9ad/0xf10 net/core/dev.c:6813 __do_softirq+0x218/0x8de kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 unwind_next_frame+0x5fb/0x23a0 arch/x86/kernel/unwind_orc.c:505 __unwind_start+0x5aa/0x880 arch/x86/kernel/unwind_orc.c:760 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xb2/0x170 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc+0x136/0x320 mm/slub.c:3852 kmem_cache_zalloc include/linux/slab.h:739 [inline] alloc_empty_file+0x73/0x1e0 fs/file_table.c:202 path_openat+0xdb/0x2990 fs/namei.c:3785 do_filp_open+0x1dc/0x430 fs/namei.c:3826 do_sys_openat2+0x17a/0x1e0 fs/open.c:1406 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1432 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_update_common+0x1fe/0xa60 net/core/sock_map.c:1007 sock_map_update_elem_sys+0x280/0x570 net/core/sock_map.c:581 bpf_map_update_value+0x36c/0x6c0 kernel/bpf/syscall.c:172 map_update_elem+0x623/0x910 kernel/bpf/syscall.c:1641 __sys_bpf+0xab9/0x4b40 kernel/bpf/syscall.c:5619 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline] __se_sys_bpf kernel/bpf/syscall.c:5736 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5736 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 } ... key at: [] __key.0+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_delete_elem+0xcb/0x260 net/core/sock_map.c:939 ___bpf_prog_run+0x3e51/0xae80 kernel/bpf/core.c:1997 __bpf_prog_run32+0xc1/0x100 kernel/bpf/core.c:2236 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run4+0x176/0x460 kernel/trace/bpf_trace.c:2422 trace_mm_page_alloc include/trace/events/kmem.h:177 [inline] __alloc_pages+0x3ad/0x2410 mm/page_alloc.c:4591 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2175 [inline] allocate_slab mm/slub.c:2338 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2391 ___slab_alloc+0x66d/0x1790 mm/slub.c:3525 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610 __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] __do_kmalloc_node mm/slub.c:3965 [inline] __kmalloc+0x3b4/0x440 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] tty_buffer_alloc+0x297/0x3d0 drivers/tty/tty_buffer.c:179 __tty_buffer_request_room+0x12e/0x2d0 drivers/tty/tty_buffer.c:272 __tty_insert_flip_string_flags+0xd7/0x400 drivers/tty/tty_buffer.c:308 tty_insert_flip_string_fixed_flag include/linux/tty_flip.h:35 [inline] tty_insert_flip_string include/linux/tty_flip.h:83 [inline] tty_insert_flip_string_and_push_buffer+0x9d/0x1f0 drivers/tty/tty_buffer.c:558 pty_write+0xd2/0x100 drivers/tty/pty.c:118 n_tty_write+0xb2b/0x1150 drivers/tty/n_tty.c:2401 iterate_tty_write drivers/tty/tty_io.c:1021 [inline] file_tty_write.constprop.0+0x518/0x9b0 drivers/tty/tty_io.c:1096 call_write_iter include/linux/fs.h:2108 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6db/0x1100 fs/read_write.c:590 ksys_write+0x12f/0x260 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 stack backtrace: CPU: 0 PID: 6263 Comm: syz-executor.2 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_bad_irq_dependency kernel/locking/lockdep.c:2626 [inline] check_irq_usage+0xe3c/0x1490 kernel/locking/lockdep.c:2865 check_prev_add kernel/locking/lockdep.c:3138 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x248e/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_delete_elem+0xcb/0x260 net/core/sock_map.c:939 ___bpf_prog_run+0x3e51/0xae80 kernel/bpf/core.c:1997 __bpf_prog_run32+0xc1/0x100 kernel/bpf/core.c:2236 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run4+0x176/0x460 kernel/trace/bpf_trace.c:2422 trace_mm_page_alloc include/trace/events/kmem.h:177 [inline] __alloc_pages+0x3ad/0x2410 mm/page_alloc.c:4591 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2175 [inline] allocate_slab mm/slub.c:2338 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2391 ___slab_alloc+0x66d/0x1790 mm/slub.c:3525 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610 __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] __do_kmalloc_node mm/slub.c:3965 [inline] __kmalloc+0x3b4/0x440 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] tty_buffer_alloc+0x297/0x3d0 drivers/tty/tty_buffer.c:179 __tty_buffer_request_room+0x12e/0x2d0 drivers/tty/tty_buffer.c:272 __tty_insert_flip_string_flags+0xd7/0x400 drivers/tty/tty_buffer.c:308 tty_insert_flip_string_fixed_flag include/linux/tty_flip.h:35 [inline] tty_insert_flip_string include/linux/tty_flip.h:83 [inline] tty_insert_flip_string_and_push_buffer+0x9d/0x1f0 drivers/tty/tty_buffer.c:558 pty_write+0xd2/0x100 drivers/tty/pty.c:118 n_tty_write+0xb2b/0x1150 drivers/tty/n_tty.c:2401 iterate_tty_write drivers/tty/tty_io.c:1021 [inline] file_tty_write.constprop.0+0x518/0x9b0 drivers/tty/tty_io.c:1096 call_write_iter include/linux/fs.h:2108 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6db/0x1100 fs/read_write.c:590 ksys_write+0x12f/0x260 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f112ba7de69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f112c7a40c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f112bbabf80 RCX: 00007f112ba7de69 RDX: 000000000000ff2e RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00007f112baca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f112bbabf80 R15: 00007ffe53edca98 ------------[ cut here ]------------ raw_local_irq_restore() called with IRQs enabled WARNING: CPU: 0 PID: 6263 at kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x29/0x30 kernel/locking/irqflag-debug.c:10 Modules linked in: CPU: 0 PID: 6263 Comm: syz-executor.2 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:warn_bogus_irq_restore+0x29/0x30 kernel/locking/irqflag-debug.c:10 Code: 90 f3 0f 1e fa 90 80 3d 72 d0 b5 04 00 74 06 90 c3 cc cc cc cc c6 05 63 d0 b5 04 01 90 48 c7 c7 c0 b1 0c 8b e8 78 6b 7d f6 90 <0f> 0b 90 90 eb df 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900038afa50 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff88807d879940 RCX: ffffc90009d61000 RDX: 0000000000040000 RSI: ffffffff814faff6 RDI: 0000000000000001 RBP: 0000000000000283 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff92000715f4f R13: 0000000000000283 R14: ffff88807d879940 R15: ffff888069510000 FS: 00007f112c7a46c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30522000 CR3: 00000000534e8000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x74/0x80 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] tty_insert_flip_string_and_push_buffer+0x143/0x1f0 drivers/tty/tty_buffer.c:561 pty_write+0xd2/0x100 drivers/tty/pty.c:118 n_tty_write+0xb2b/0x1150 drivers/tty/n_tty.c:2401 iterate_tty_write drivers/tty/tty_io.c:1021 [inline] file_tty_write.constprop.0+0x518/0x9b0 drivers/tty/tty_io.c:1096 call_write_iter include/linux/fs.h:2108 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6db/0x1100 fs/read_write.c:590 ksys_write+0x12f/0x260 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f112ba7de69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f112c7a40c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f112bbabf80 RCX: 00007f112ba7de69 RDX: 000000000000ff2e RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00007f112baca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f112bbabf80 R15: 00007ffe53edca98