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WARNING: CPU: 0 PID: 3306 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x150/0x154 drivers/gpu/drm/vkms/vkms_crtc.c:21
Modules linked in:
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 3306 Comm: syz-executor.1 Not tainted 5.12.0-rc3-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<81802550>] (dump_backtrace) from [<818027c4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:252)
 r7:00000080 r6:60000193 r5:00000000 r4:82b58344
[<818027ac>] (show_stack) from [<81809e98>] (__dump_stack lib/dump_stack.c:79 [inline])
[<818027ac>] (show_stack) from [<81809e98>] (dump_stack+0xb8/0xe8 lib/dump_stack.c:120)
[<81809de0>] (dump_stack) from [<81803358>] (panic+0x130/0x378 kernel/panic.c:231)
 r7:81f48198 r6:82a390a4 r5:00000000 r4:82c6b0d0
[<81803228>] (panic) from [<802446f4>] (__warn+0xb0/0x164 kernel/panic.c:605)
 r3:82a2248c r2:00000000 r1:00000000 r0:81f48198
 r7:00000015
[<80244644>] (__warn) from [<81803608>] (warn_slowpath_fmt+0x68/0xd4 kernel/panic.c:628)
 r7:809fa964 r6:00000015 r5:81fcbd70 r4:00000000
[<818035a4>] (warn_slowpath_fmt) from [<809fa964>] (vkms_vblank_simulate+0x150/0x154 drivers/gpu/drm/vkms/vkms_crtc.c:21)
 r8:00fe4c00 r7:844d0720 r6:82a22498 r5:00000000 r4:844d1390
[<809fa814>] (vkms_vblank_simulate) from [<80307ebc>] (__run_hrtimer kernel/time/hrtimer.c:1537 [inline])
[<809fa814>] (vkms_vblank_simulate) from [<80307ebc>] (__hrtimer_run_queues+0xd4/0x690 kernel/time/hrtimer.c:1601)
 r9:868fc000 r8:ddfc53e0 r7:ddfc5380 r6:82a22498 r5:00000000 r4:844d1390
[<80307de8>] (__hrtimer_run_queues) from [<80308da0>] (hrtimer_interrupt+0x14c/0x2e0 kernel/time/hrtimer.c:1663)
 r10:ddfc54d8 r9:ddfc5498 r8:ddfc5458 r7:ddfc54a0 r6:ddfc54e0 r5:20000193
 r4:ddfc5380
[<80308c54>] (hrtimer_interrupt) from [<8114c308>] (timer_handler drivers/clocksource/arm_arch_timer.c:647 [inline])
[<80308c54>] (hrtimer_interrupt) from [<8114c308>] (arch_timer_handler_virt+0x30/0x38 drivers/clocksource/arm_arch_timer.c:658)
 r10:868fdb18 r9:868fdb80 r8:868fdae8 r7:8348d940 r6:82a22c34 r5:0000001c
 r4:8348b000
[<8114c2d8>] (arch_timer_handler_virt) from [<802df904>] (handle_percpu_devid_irq+0xa4/0x19c kernel/irq/chip.c:930)
[<802df860>] (handle_percpu_devid_irq) from [<802d8730>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline])
[<802df860>] (handle_percpu_devid_irq) from [<802d8730>] (generic_handle_irq kernel/irq/irqdesc.c:652 [inline])
[<802df860>] (handle_percpu_devid_irq) from [<802d8730>] (__handle_domain_irq+0xb0/0x120 kernel/irq/irqdesc.c:689)
 r10:868fdb18 r9:868fdb80 r8:00000001 r7:868fdcd0 r6:828ad498 r5:00000000
 r4:828ad498 r3:00010100
[<802d8680>] (__handle_domain_irq) from [<8088af70>] (handle_domain_irq include/linux/irqdesc.h:176 [inline])
[<802d8680>] (__handle_domain_irq) from [<8088af70>] (gic_handle_irq+0x84/0xac drivers/irqchip/irq-gic.c:370)
 r10:00000200 r9:868fc000 r8:e000200c r7:828ad4bc r6:e0002000 r5:868fdb80
 r4:82a22c34
[<8088aeec>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205)
Exception stack(0x868fdb80 to 0x868fdbc8)
db80: 00000000 821137b8 00000001 0235a7ea 828a2440 8024dff4 828ad498 00000000
dba0: 00000001 868fc000 00000200 868fdc3c 868fdb78 868fdbd0 8181dacc 802011f0
dbc0: 20000113 ffffffff
 r9:868fc000 r8:00000001 r7:868fdbb4 r6:ffffffff r5:20000113 r4:802011f0
[<802010f8>] (__do_softirq) from [<8024dff4>] (do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline])
[<802010f8>] (__do_softirq) from [<8024dff4>] (invoke_softirq kernel/softirq.c:228 [inline])
[<802010f8>] (__do_softirq) from [<8024dff4>] (__irq_exit_rcu+0x1d8/0x200 kernel/softirq.c:422)
 r10:868fdc68 r9:868fdcd0 r8:00000001 r7:00000000 r6:828ad498 r5:00000000
 r4:828aecc0
[<8024de1c>] (__irq_exit_rcu) from [<8024e1a8>] (irq_exit+0x10/0x3c kernel/softirq.c:446)
 r5:00000000 r4:828ad498
[<8024e198>] (irq_exit) from [<802d8734>] (__handle_domain_irq+0xb4/0x120 kernel/irq/irqdesc.c:692)
[<802d8680>] (__handle_domain_irq) from [<8088af70>] (handle_domain_irq include/linux/irqdesc.h:176 [inline])
[<802d8680>] (__handle_domain_irq) from [<8088af70>] (gic_handle_irq+0x84/0xac drivers/irqchip/irq-gic.c:370)
 r10:00000000 r9:868fc000 r8:e000200c r7:828ad4bc r6:e0002000 r5:868fdcd0
 r4:82a22c34
[<8088aeec>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205)
Exception stack(0x868fdcd0 to 0x868fdd18)
dcc0:                                     00000000 81f42cdc 5b71e000 60000093
dce0: 868fdd20 828a2680 828a2680 00000000 00000000 60000013 00000000 868fdd94
dd00: 868fdd10 868fdd20 8181dacc 802bfbc4 20000013 ffffffff
 r9:868fc000 r8:00000000 r7:868fdd04 r6:ffffffff r5:20000013 r4:802bfbc4
[<802bfaa0>] (lock_acquire.part.0) from [<802bff28>] (lock_acquire+0x6c/0x74 kernel/locking/lockdep.c:5483)
 r10:8046d9a4 r9:00000000 r8:00000001 r7:00000001 r6:00000000 r5:00000000
 r4:835e37b8
[<802bfebc>] (lock_acquire) from [<8046d9c8>] (__might_fault mm/memory.c:5021 [inline])
[<802bfebc>] (lock_acquire) from [<8046d9c8>] (__might_fault+0x88/0xb4 mm/memory.c:5006)
 r10:81325f38 r9:00000000 r8:7ecd3e90 r7:7ecd3ee8 r6:86636600 r5:00000000
 r4:ffffe000
[<8046d940>] (__might_fault) from [<81515a5c>] (do_ip_getsockopt+0xa8/0xac8 net/ipv4/ip_sockglue.c:1529)
 r5:86636600 r4:00000041
[<815159b4>] (do_ip_getsockopt) from [<815164b4>] (ip_getsockopt+0x38/0x120 net/ipv4/ip_sockglue.c:1761)
 r9:7ecd3e90 r8:7ecd3ee8 r7:7ecd3ee8 r6:7ecd3e90 r5:86636600 r4:00000041
[<8151647c>] (ip_getsockopt) from [<81525018>] (tcp_getsockopt+0x34/0x54 net/ipv4/tcp.c:4239)
 r8:7ecd3ee8 r7:00000041 r6:00000000 r5:862a8340 r4:8151647c
[<81524fe4>] (tcp_getsockopt) from [<81325f60>] (sock_common_getsockopt+0x28/0x30 net/core/sock.c:3236)
 r4:81524fe4
[<81325f38>] (sock_common_getsockopt) from [<81324cd4>] (__sys_getsockopt+0x9c/0x198 net/socket.c:2161)
 r4:00000000
[<81324c38>] (__sys_getsockopt) from [<81324dec>] (__do_sys_getsockopt net/socket.c:2176 [inline])
[<81324c38>] (__sys_getsockopt) from [<81324dec>] (sys_getsockopt+0x1c/0x24 net/socket.c:2173)
 r10:00000127 r9:868fc000 r8:80200224 r7:00000127 r6:7ecd3ee8 r5:7ecd3e94
 r4:7ecd3e90
[<81324dd0>] (sys_getsockopt) from [<80200060>] (ret_fast_syscall+0x0/0x2c arch/arm/mm/proc-v7.S:64)
Exception stack(0x868fdfa8 to 0x868fdff0)
dfa0:                   7ecd3e90 7ecd3e94 00000003 00000000 00000041 7ecd3ee8
dfc0: 7ecd3e90 7ecd3e94 7ecd3ee8 00000127 00000000 00109e10 7ecd3e90 00107c20
dfe0: 00000000 7ecd3e78 00015958 0004ceb0
Rebooting in 86400 seconds..