===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 6.9.0-rc1-syzkaller-00009-g7033999ecd7b #0 Not tainted ----------------------------------------------------- syz-executor.1/9285 [HC0[0]:SC0[2]:HE0:SE0] is trying to acquire: ffff88805ca1fa00 (&stab->lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] ffff88805ca1fa00 (&stab->lock){+.-.}-{2:2}, at: __sock_map_delete net/core/sock_map.c:414 [inline] ffff88805ca1fa00 (&stab->lock){+.-.}-{2:2}, at: sock_map_delete_elem+0xc8/0x150 net/core/sock_map.c:446 and this task is already holding: ffff88801dbc63f0 (&dev->event_lock){-.-.}-{2:2}, at: drm_atomic_helper_fake_vblank+0x168/0x2e0 drivers/gpu/drm/drm_atomic_helper.c:2465 which would create a new lock dependency: (&dev->event_lock){-.-.}-{2:2} -> (&stab->lock){+.-.}-{2:2} but this new dependency connects a HARDIRQ-irq-safe lock: (&dev->event_lock){-.-.}-{2:2} ... which became HARDIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 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 drm_handle_vblank+0x125/0xbf0 drivers/gpu/drm/drm_vblank.c:1885 vkms_vblank_simulate+0xed/0x3e0 drivers/gpu/drm/vkms/vkms_crtc.c:29 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] default_idle+0xf/0x20 arch/x86/kernel/process.c:742 default_idle_call+0x6d/0xb0 kernel/sched/idle.c:117 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x32c/0x3f0 kernel/sched/idle.c:332 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430 start_secondary+0x220/0x2b0 arch/x86/kernel/smpboot.c:313 common_startup_64+0x13e/0x148 to a HARDIRQ-irq-unsafe lock: (&stab->lock){+.-.}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 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_map_delete net/core/sock_map.c:414 [inline] sock_map_delete_elem+0xc8/0x150 net/core/sock_map.c:446 0xffffffffa0002366 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_run3+0x167/0x440 kernel/trace/bpf_trace.c:2421 trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] kmem_cache_free+0x1d4/0x380 mm/slub.c:4343 kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1159 __kfree_skb net/core/skbuff.c:1217 [inline] consume_skb net/core/skbuff.c:1432 [inline] consume_skb+0xdf/0x170 net/core/skbuff.c:1426 nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline] nsim_dev_trap_report_work+0x878/0xc80 drivers/net/netdevsim/dev.c:850 process_one_work+0x902/0x1a30 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 other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&stab->lock); local_irq_disable(); lock(&dev->event_lock); lock(&stab->lock); lock(&dev->event_lock); *** DEADLOCK *** 12 locks held by syz-executor.1/9285: #0: ffff8880286240a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffff888028624130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:954 [inline] #1: ffff888028624130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: iterate_tty_write drivers/tty/tty_io.c:973 [inline] #1: ffff888028624130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x293/0x9b0 drivers/tty/tty_io.c:1096 #2: ffff8880286242e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_write+0x1c7/0x1150 drivers/tty/n_tty.c:2362 #3: ffffc9000d6af380 (&ldata->output_lock){+.+.}-{3:3}, at: process_output_block drivers/tty/n_tty.c:529 [inline] #3: ffffc9000d6af380 (&ldata->output_lock){+.+.}-{3:3}, at: n_tty_write+0x53d/0x1150 drivers/tty/n_tty.c:2379 #4: ffffffff8d7a2540 (console_lock){+.+.}-{0:0}, at: do_con_write+0x154/0x7d00 drivers/tty/vt/vt.c:3056 #5: ffff88801adee280 (&helper->lock){+.+.}-{3:3}, at: drm_fb_helper_pan_display+0xd5/0x990 drivers/gpu/drm/drm_fb_helper.c:1423 #6: ffff88801dbc61b0 (&dev->master_mutex){+.+.}-{3:3}, at: drm_master_internal_acquire+0x21/0x80 drivers/gpu/drm/drm_auth.c:452 #7: ffff88801adee098 (&client->modeset_mutex){+.+.}-{3:3}, at: drm_client_modeset_commit_locked+0x4c/0x580 drivers/gpu/drm/drm_client_modeset.c:1152 #8: ffffc90002f27508 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_client_modeset_commit_atomic+0xd0/0x810 drivers/gpu/drm/drm_client_modeset.c:990 #9: ffff88801e2108d0 (crtc_ww_class_mutex){+.+.}-{3:3}, at: modeset_lock+0x488/0x6c0 drivers/gpu/drm/drm_modeset_lock.c:314 #10: ffff88801dbc63f0 (&dev->event_lock){-.-.}-{2:2}, at: drm_atomic_helper_fake_vblank+0x168/0x2e0 drivers/gpu/drm/drm_atomic_helper.c:2465 #11: ffffffff8d7b4b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #11: ffffffff8d7b4b60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #11: ffffffff8d7b4b60 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline] #11: ffffffff8d7b4b60 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0xe4/0x420 kernel/trace/bpf_trace.c:2420 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&dev->event_lock){-.-.}-{2:2} { IN-HARDIRQ-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 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 drm_handle_vblank+0x125/0xbf0 drivers/gpu/drm/drm_vblank.c:1885 vkms_vblank_simulate+0xed/0x3e0 drivers/gpu/drm/vkms/vkms_crtc.c:29 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] default_idle+0xf/0x20 arch/x86/kernel/process.c:742 default_idle_call+0x6d/0xb0 kernel/sched/idle.c:117 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x32c/0x3f0 kernel/sched/idle.c:332 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430 start_secondary+0x220/0x2b0 arch/x86/kernel/smpboot.c:313 common_startup_64+0x13e/0x148 IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 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 drm_handle_vblank+0x125/0xbf0 drivers/gpu/drm/drm_vblank.c:1885 vkms_vblank_simulate+0xed/0x3e0 drivers/gpu/drm/vkms/vkms_crtc.c:29 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x43/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 check_kcov_mode kernel/kcov.c:173 [inline] __sanitizer_cov_trace_pc+0x29/0x60 kernel/kcov.c:207 unwind_next_frame+0x11e5/0x23a0 arch/x86/kernel/unwind_orc.c:672 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 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 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:240 [inline] __kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kmem_cache_free+0x12e/0x380 mm/slub.c:4344 kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1159 __kfree_skb net/core/skbuff.c:1217 [inline] kfree_skb_reason+0x13a/0x210 net/core/skbuff.c:1252 kfree_skb include/linux/skbuff.h:1267 [inline] geneve_rx drivers/net/geneve.c:327 [inline] geneve_udp_encap_recv+0x2fb/0x28e0 drivers/net/geneve.c:398 udp_queue_rcv_one_skb+0xacf/0x1890 net/ipv4/udp.c:2107 udp_queue_rcv_skb+0x131/0xbc0 net/ipv4/udp.c:2185 udp_unicast_rcv_skb+0x165/0x3b0 net/ipv4/udp.c:2345 __udp4_lib_rcv+0x2636/0x3550 net/ipv4/udp.c:2421 ip_protocol_deliver_rcu+0x30c/0x4e0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x316/0x570 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:460 [inline] ip_rcv_finish net/ipv4/ip_input.c:449 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_rcv+0x2c5/0x5d0 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core+0x199/0x1e0 net/core/dev.c:5538 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5652 process_backlog+0x12f/0x6f0 net/core/dev.c:5981 __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:6816 __do_softirq+0x218/0x922 kernel/softirq.c:554 do_softirq kernel/softirq.c:455 [inline] do_softirq+0xb2/0xf0 kernel/softirq.c:442 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:851 [inline] __dev_queue_xmit+0x879/0x3f20 net/core/dev.c:4362 dev_queue_xmit include/linux/netdevice.h:3091 [inline] neigh_resolve_output net/core/neighbour.c:1563 [inline] neigh_resolve_output+0x5bc/0x950 net/core/neighbour.c:1543 neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0x673/0x1880 net/ipv6/ip6_output.c:137 __ip6_finish_output net/ipv6/ip6_output.c:211 [inline] ip6_finish_output+0x3f9/0x1300 net/ipv6/ip6_output.c:222 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x1eb/0x540 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xa2d/0x1c30 net/ipv6/ndisc.c:509 ndisc_send_rs+0x12b/0x6a0 net/ipv6/ndisc.c:719 addrconf_dad_completed+0x4a1/0x1060 net/ipv6/addrconf.c:4357 addrconf_dad_work+0x807/0x1500 net/ipv6/addrconf.c:4265 process_one_work+0x902/0x1a30 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+0x1b1/0x560 kernel/locking/lockdep.c:5719 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] vkms_crtc_atomic_flush+0x98/0x2b0 drivers/gpu/drm/vkms/vkms_crtc.c:253 drm_atomic_helper_commit_planes+0x61c/0x1000 drivers/gpu/drm/drm_atomic_helper.c:2820 vkms_atomic_commit_tail+0x5e/0x240 drivers/gpu/drm/vkms/vkms_drv.c:73 commit_tail+0x284/0x410 drivers/gpu/drm/drm_atomic_helper.c:1832 drm_atomic_helper_commit+0x2fd/0x380 drivers/gpu/drm/drm_atomic_helper.c:2072 drm_atomic_commit+0x227/0x300 drivers/gpu/drm/drm_atomic.c:1514 drm_client_modeset_commit_atomic+0x6c6/0x810 drivers/gpu/drm/drm_client_modeset.c:1051 drm_client_modeset_commit_locked+0x14d/0x580 drivers/gpu/drm/drm_client_modeset.c:1154 drm_client_modeset_commit+0x4f/0x80 drivers/gpu/drm/drm_client_modeset.c:1180 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:251 [inline] __drm_fb_helper_restore_fbdev_mode_unlocked+0x130/0x180 drivers/gpu/drm/drm_fb_helper.c:230 drm_fb_helper_set_par+0xd8/0x120 drivers/gpu/drm/drm_fb_helper.c:1344 fbcon_init+0x880/0x1890 drivers/video/fbdev/core/fbcon.c:1093 visual_init+0x31d/0x620 drivers/tty/vt/vt.c:1011 do_bind_con_driver.isra.0+0x57a/0xbf0 drivers/tty/vt/vt.c:3823 do_take_over_console+0x4f4/0x650 drivers/tty/vt/vt.c:4389 do_fbcon_takeover+0xe8/0x210 drivers/video/fbdev/core/fbcon.c:531 do_fb_registered drivers/video/fbdev/core/fbcon.c:2968 [inline] fbcon_fb_registered+0x375/0x670 drivers/video/fbdev/core/fbcon.c:2988 do_register_framebuffer drivers/video/fbdev/core/fbmem.c:449 [inline] register_framebuffer+0x485/0x840 drivers/video/fbdev/core/fbmem.c:515 __drm_fb_helper_initial_config_and_unlock+0xecb/0x1660 drivers/gpu/drm/drm_fb_helper.c:1871 drm_fb_helper_initial_config drivers/gpu/drm/drm_fb_helper.c:1936 [inline] drm_fb_helper_initial_config+0x44/0x60 drivers/gpu/drm/drm_fb_helper.c:1928 drm_fbdev_generic_client_hotplug+0x1a6/0x280 drivers/gpu/drm/drm_fbdev_generic.c:279 drm_client_register+0x195/0x280 drivers/gpu/drm/drm_client.c:141 drm_fbdev_generic_setup+0x184/0x340 drivers/gpu/drm/drm_fbdev_generic.c:341 vkms_create drivers/gpu/drm/vkms/vkms_drv.c:226 [inline] vkms_init+0x62d/0x760 drivers/gpu/drm/vkms/vkms_drv.c:252 do_one_initcall+0x128/0x630 init/main.c:1238 do_initcall_level init/main.c:1300 [inline] do_initcalls init/main.c:1316 [inline] do_basic_setup init/main.c:1335 [inline] kernel_init_freeable+0x660/0xc50 init/main.c:1548 kernel_init+0x1c/0x2b0 init/main.c:1437 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.5+0x0/0x40 the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (&stab->lock){+.-.}-{2:2} { HARDIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 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_map_delete net/core/sock_map.c:414 [inline] sock_map_delete_elem+0xc8/0x150 net/core/sock_map.c:446 0xffffffffa0002366 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_run3+0x167/0x440 kernel/trace/bpf_trace.c:2421 trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] kmem_cache_free+0x1d4/0x380 mm/slub.c:4343 kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1159 __kfree_skb net/core/skbuff.c:1217 [inline] consume_skb net/core/skbuff.c:1432 [inline] consume_skb+0xdf/0x170 net/core/skbuff.c:1426 nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline] nsim_dev_trap_report_work+0x878/0xc80 drivers/net/netdevsim/dev.c:850 process_one_work+0x902/0x1a30 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+0x1b1/0x560 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_map_delete net/core/sock_map.c:414 [inline] sock_map_delete_elem+0xc8/0x150 net/core/sock_map.c:446 0xffffffffa0002366 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_run3+0x167/0x440 kernel/trace/bpf_trace.c:2421 trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] kmem_cache_free+0x1d4/0x380 mm/slub.c:4343 kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1159 __kfree_skb net/core/skbuff.c:1217 [inline] kfree_skb_partial+0xb6/0xe0 net/core/skbuff.c:5894 tcp_add_backlog+0x13b1/0x1e10 net/ipv4/tcp_ipv4.c:2098 tcp_v4_rcv+0x347e/0x3b40 net/ipv4/tcp_ipv4.c:2334 ip_protocol_deliver_rcu+0xba/0x4e0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x316/0x570 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:460 [inline] ip_sublist_rcv_finish+0x2c1/0x620 net/ipv4/ip_input.c:580 ip_list_rcv_finish.constprop.0+0x559/0x720 net/ipv4/ip_input.c:631 ip_sublist_rcv net/ipv4/ip_input.c:639 [inline] ip_list_rcv+0x339/0x450 net/ipv4/ip_input.c:674 __netif_receive_skb_list_ptype net/core/dev.c:5581 [inline] __netif_receive_skb_list_core+0x755/0x950 net/core/dev.c:5629 __netif_receive_skb_list net/core/dev.c:5681 [inline] netif_receive_skb_list_internal+0x753/0xda0 net/core/dev.c:5773 gro_normal_list include/net/gro.h:438 [inline] gro_normal_list include/net/gro.h:434 [inline] napi_complete_done+0x23f/0x9a0 net/core/dev.c:6113 e1000_clean+0x9c3/0x2840 drivers/net/ethernet/intel/e1000/e1000_main.c:3811 __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:6816 __do_softirq+0x218/0x922 kernel/softirq.c:554 do_softirq kernel/softirq.c:455 [inline] do_softirq+0xb2/0xf0 kernel/softirq.c:442 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:851 [inline] __dev_queue_xmit+0x879/0x3f20 net/core/dev.c:4362 dev_queue_xmit include/linux/netdevice.h:3091 [inline] neigh_hh_output include/net/neighbour.h:526 [inline] neigh_output include/net/neighbour.h:540 [inline] ip_finish_output2+0x16bf/0x2590 net/ipv4/ip_output.c:235 __ip_finish_output net/ipv4/ip_output.c:313 [inline] __ip_finish_output+0x49e/0x950 net/ipv4/ip_output.c:295 ip_finish_output+0x31/0x310 net/ipv4/ip_output.c:323 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip_output+0x13b/0x2a0 net/ipv4/ip_output.c:433 dst_output include/net/dst.h:450 [inline] ip_local_out+0x33e/0x4a0 net/ipv4/ip_output.c:129 __ip_queue_xmit+0x747/0x1940 net/ipv4/ip_output.c:535 __tcp_transmit_skb+0x29c1/0x3da0 net/ipv4/tcp_output.c:1462 tcp_transmit_skb net/ipv4/tcp_output.c:1480 [inline] tcp_write_xmit+0xfe0/0x7ee0 net/ipv4/tcp_output.c:2792 __tcp_push_pending_frames+0xaf/0x390 net/ipv4/tcp_output.c:2977 tcp_push+0x221/0x6f0 net/ipv4/tcp.c:738 tcp_sendmsg_locked+0x27b8/0x3480 net/ipv4/tcp.c:1310 tcp_sendmsg+0x2e/0x50 net/ipv4/tcp.c:1342 inet_sendmsg+0xb9/0x140 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_write_iter+0x4b8/0x5c0 net/socket.c:1160 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+0x1f8/0x260 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 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 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_map_delete net/core/sock_map.c:414 [inline] sock_map_delete_elem+0xc8/0x150 net/core/sock_map.c:446 0xffffffffa0002366 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_run3+0x167/0x440 kernel/trace/bpf_trace.c:2421 trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] kmem_cache_free+0x1d4/0x380 mm/slub.c:4343 kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1159 __kfree_skb net/core/skbuff.c:1217 [inline] consume_skb net/core/skbuff.c:1432 [inline] consume_skb+0xdf/0x170 net/core/skbuff.c:1426 nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline] nsim_dev_trap_report_work+0x878/0xc80 drivers/net/netdevsim/dev.c:850 process_one_work+0x902/0x1a30 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 } ... key at: [] __key.1+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 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_map_delete net/core/sock_map.c:414 [inline] sock_map_delete_elem+0xc8/0x150 net/core/sock_map.c:446 bpf_prog_2c29ac5cdc6b1842+0x42/0x46 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_run2+0x151/0x420 kernel/trace/bpf_trace.c:2420 trace_kfree include/trace/events/kmem.h:94 [inline] kfree+0x225/0x390 mm/slub.c:4377 drm_send_event_helper+0x4c1/0x5f0 drivers/gpu/drm/drm_file.c:770 drm_crtc_send_vblank_event+0x14e/0x1d0 drivers/gpu/drm/drm_vblank.c:1129 drm_atomic_helper_fake_vblank+0x1ab/0x2e0 drivers/gpu/drm/drm_atomic_helper.c:2467 drm_atomic_helper_commit_tail+0x7c/0xf0 drivers/gpu/drm/drm_atomic_helper.c:1753 commit_tail+0x356/0x410 drivers/gpu/drm/drm_atomic_helper.c:1834 drm_atomic_helper_commit+0x2fd/0x380 drivers/gpu/drm/drm_atomic_helper.c:2072 drm_atomic_commit+0x227/0x300 drivers/gpu/drm/drm_atomic.c:1514 drm_client_modeset_commit_atomic+0x6c6/0x810 drivers/gpu/drm/drm_client_modeset.c:1051 drm_client_modeset_commit_locked+0x14d/0x580 drivers/gpu/drm/drm_client_modeset.c:1154 pan_display_atomic drivers/gpu/drm/drm_fb_helper.c:1370 [inline] drm_fb_helper_pan_display+0x2a5/0x990 drivers/gpu/drm/drm_fb_helper.c:1430 fb_pan_display+0x477/0x7d0 drivers/video/fbdev/core/fbmem.c:191 bit_update_start+0x49/0x1f0 drivers/video/fbdev/core/bitblit.c:381 fbcon_switch+0xbbf/0x12f0 drivers/video/fbdev/core/fbcon.c:2166 flush_scrollback drivers/tty/vt/vt.c:901 [inline] csi_J+0x868/0xad0 drivers/tty/vt/vt.c:1516 csi_ECMA drivers/tty/vt/vt.c:2474 [inline] do_con_trol drivers/tty/vt/vt.c:2657 [inline] do_con_write+0x3e87/0x7d00 drivers/tty/vt/vt.c:3092 con_write+0x23/0xb0 drivers/tty/vt/vt.c:3434 process_output_block drivers/tty/n_tty.c:574 [inline] n_tty_write+0x423/0x1150 drivers/tty/n_tty.c:2379 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_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7a/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7a/0x84 stack backtrace: CPU: 2 PID: 9285 Comm: syz-executor.1 Not tainted 6.9.0-rc1-syzkaller-00009-g7033999ecd7b #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 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+0x1b1/0x560 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_map_delete net/core/sock_map.c:414 [inline] sock_map_delete_elem+0xc8/0x150 net/core/sock_map.c:446 bpf_prog_2c29ac5cdc6b1842+0x42/0x46 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_run2+0x151/0x420 kernel/trace/bpf_trace.c:2420 trace_kfree include/trace/events/kmem.h:94 [inline] kfree+0x225/0x390 mm/slub.c:4377 drm_send_event_helper+0x4c1/0x5f0 drivers/gpu/drm/drm_file.c:770 drm_crtc_send_vblank_event+0x14e/0x1d0 drivers/gpu/drm/drm_vblank.c:1129 drm_atomic_helper_fake_vblank+0x1ab/0x2e0 drivers/gpu/drm/drm_atomic_helper.c:2467 drm_atomic_helper_commit_tail+0x7c/0xf0 drivers/gpu/drm/drm_atomic_helper.c:1753 commit_tail+0x356/0x410 drivers/gpu/drm/drm_atomic_helper.c:1834 drm_atomic_helper_commit+0x2fd/0x380 drivers/gpu/drm/drm_atomic_helper.c:2072 drm_atomic_commit+0x227/0x300 drivers/gpu/drm/drm_atomic.c:1514 drm_client_modeset_commit_atomic+0x6c6/0x810 drivers/gpu/drm/drm_client_modeset.c:1051 drm_client_modeset_commit_locked+0x14d/0x580 drivers/gpu/drm/drm_client_modeset.c:1154 pan_display_atomic drivers/gpu/drm/drm_fb_helper.c:1370 [inline] drm_fb_helper_pan_display+0x2a5/0x990 drivers/gpu/drm/drm_fb_helper.c:1430 fb_pan_display+0x477/0x7d0 drivers/video/fbdev/core/fbmem.c:191 bit_update_start+0x49/0x1f0 drivers/video/fbdev/core/bitblit.c:381 fbcon_switch+0xbbf/0x12f0 drivers/video/fbdev/core/fbcon.c:2166 flush_scrollback drivers/tty/vt/vt.c:901 [inline] csi_J+0x868/0xad0 drivers/tty/vt/vt.c:1516 csi_ECMA drivers/tty/vt/vt.c:2474 [inline] do_con_trol drivers/tty/vt/vt.c:2657 [inline] do_con_write+0x3e87/0x7d00 drivers/tty/vt/vt.c:3092 con_write+0x23/0xb0 drivers/tty/vt/vt.c:3434 process_output_block drivers/tty/n_tty.c:574 [inline] n_tty_write+0x423/0x1150 drivers/tty/n_tty.c:2379 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_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7a/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7a/0x84 RIP: 0023:0xf725d579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5e575ac EFLAGS: 00000292 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 0000000020001100 RDX: 0000000000001006 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ raw_local_irq_restore() called with IRQs enabled WARNING: CPU: 2 PID: 9285 at kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x29/0x30 kernel/locking/irqflag-debug.c:10 Modules linked in: CPU: 2 PID: 9285 Comm: syz-executor.1 Not tainted 6.9.0-rc1-syzkaller-00009-g7033999ecd7b #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:warn_bogus_irq_restore+0x29/0x30 kernel/locking/irqflag-debug.c:10 Code: 90 f3 0f 1e fa 90 80 3d f1 4b b4 04 00 74 06 90 c3 cc cc cc cc c6 05 e2 4b b4 04 01 90 48 c7 c7 a0 cc 0c 8b e8 38 52 7c 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:ffffc90002f27220 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff88801dbc63d8 RCX: ffffc9002892c000 RDX: 0000000000040000 RSI: ffffffff8150eb46 RDI: 0000000000000001 RBP: 0000000000000287 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000008 R12: 0000000000000287 R13: ffff88806331f500 R14: ffff88801e210078 R15: ffff88805ad90800 FS: 0000000000000000(0000) GS:ffff88802c400000(0063) knlGS:00000000f5e57b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020002000 CR3: 0000000065d58000 CR4: 0000000000350ef0 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] drm_atomic_helper_fake_vblank+0x1f1/0x2e0 drivers/gpu/drm/drm_atomic_helper.c:2471 drm_atomic_helper_commit_tail+0x7c/0xf0 drivers/gpu/drm/drm_atomic_helper.c:1753 commit_tail+0x356/0x410 drivers/gpu/drm/drm_atomic_helper.c:1834 drm_atomic_helper_commit+0x2fd/0x380 drivers/gpu/drm/drm_atomic_helper.c:2072 drm_atomic_commit+0x227/0x300 drivers/gpu/drm/drm_atomic.c:1514 drm_client_modeset_commit_atomic+0x6c6/0x810 drivers/gpu/drm/drm_client_modeset.c:1051 drm_client_modeset_commit_locked+0x14d/0x580 drivers/gpu/drm/drm_client_modeset.c:1154 pan_display_atomic drivers/gpu/drm/drm_fb_helper.c:1370 [inline] drm_fb_helper_pan_display+0x2a5/0x990 drivers/gpu/drm/drm_fb_helper.c:1430 fb_pan_display+0x477/0x7d0 drivers/video/fbdev/core/fbmem.c:191 bit_update_start+0x49/0x1f0 drivers/video/fbdev/core/bitblit.c:381 fbcon_switch+0xbbf/0x12f0 drivers/video/fbdev/core/fbcon.c:2166 flush_scrollback drivers/tty/vt/vt.c:901 [inline] csi_J+0x868/0xad0 drivers/tty/vt/vt.c:1516 csi_ECMA drivers/tty/vt/vt.c:2474 [inline] do_con_trol drivers/tty/vt/vt.c:2657 [inline] do_con_write+0x3e87/0x7d00 drivers/tty/vt/vt.c:3092 con_write+0x23/0xb0 drivers/tty/vt/vt.c:3434 process_output_block drivers/tty/n_tty.c:574 [inline] n_tty_write+0x423/0x1150 drivers/tty/n_tty.c:2379 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_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7a/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7a/0x84 RIP: 0023:0xf725d579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5e575ac EFLAGS: 00000292 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 0000000020001100 RDX: 0000000000001006 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi