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WARNING: CPU: 1 PID: 6557 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: 1 PID: 6557 Comm: syz-executor.0 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 r7:84510720 r6:82a22498 r5:00000000 r4:84511390
[<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)
 r9:855b6000 r8:ddfdb3e0 r7:ddfdb380 r6:82a22498 r5:00000000 r4:84511390
[<80307de8>] (__hrtimer_run_queues) from [<80308da0>] (hrtimer_interrupt+0x14c/0x2e0 kernel/time/hrtimer.c:1663)
 r10:ddfdb4d8 r9:ddfdb498 r8:ddfdb458 r7:ddfdb4a0 r6:ddfdb4e0 r5:20000193
 r4:ddfdb380
[<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)
 r10:855b7cb0 r9:855b7d18 r8:855b7c80 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)
 r10:855b7cb0 r9:855b7d18 r8:00000001 r7:00000000 r6:828ad498 r5:00000000
 r4:828ad498 r3:00010002
[<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)
 r10:86ca5140 r9:40000193 r8:e000200c r7:828ad4bc r6:e0002000 r5:855b7d18
 r4:82a22c34
[<8088aeec>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205)
Exception stack(0x855b7d18 to 0x855b7d60)
7d00:                                                       00000001 5b734000
7d20: 828a2680 60000193 86ca57e8 00000002 82b09c5c 828a2680 00000001 60000113
7d40: 86ca5140 855b7d94 855b7d58 855b7d68 8181dacc 8181c9d0 20000113 ffffffff
 r9:855b6000 r8:00000001 r7:855b7d4c r6:ffffffff r5:20000113 r4:8181c9d0
[<8181c880>] (lock_is_held_type) from [<802e7d5c>] (lock_is_held include/linux/lockdep.h:278 [inline])
[<8181c880>] (lock_is_held_type) from [<802e7d5c>] (rcu_read_lock_held kernel/rcu/update.c:311 [inline])
[<8181c880>] (lock_is_held_type) from [<802e7d5c>] (rcu_read_lock_held+0x44/0x54 kernel/rcu/update.c:305)
 r10:df788830 r9:00000001 r8:00000406 r7:82bfd531 r6:0000000f r5:855b7e3c
 r4:df788830 r3:855b6000
[<802e7d18>] (rcu_read_lock_held) from [<8041b048>] (xa_entry include/linux/xarray.h:1180 [inline])
[<802e7d18>] (rcu_read_lock_held) from [<8041b048>] (xas_reload include/linux/xarray.h:1563 [inline])
[<802e7d18>] (rcu_read_lock_held) from [<8041b048>] (next_uptodate_page+0x2ec/0x550 mm/filemap.c:3049)
[<8041ad5c>] (next_uptodate_page) from [<8041b4e0>] (next_map_page mm/filemap.c:3086 [inline])
[<8041ad5c>] (next_uptodate_page) from [<8041b4e0>] (filemap_map_pages+0x234/0x5dc mm/filemap.c:3142)
 r10:8607e390 r9:8606bd34 r8:00011000 r7:00000001 r6:0000000f r5:855b7eb8
 r4:df788830
[<8041b2ac>] (filemap_map_pages) from [<80473408>] (do_fault_around mm/memory.c:3920 [inline])
[<8041b2ac>] (filemap_map_pages) from [<80473408>] (do_read_fault mm/memory.c:3934 [inline])
[<8041b2ac>] (filemap_map_pages) from [<80473408>] (do_fault mm/memory.c:4067 [inline])
[<8041b2ac>] (filemap_map_pages) from [<80473408>] (handle_pte_fault mm/memory.c:4318 [inline])
[<8041b2ac>] (filemap_map_pages) from [<80473408>] (__handle_mm_fault mm/memory.c:4453 [inline])
[<8041b2ac>] (filemap_map_pages) from [<80473408>] (handle_mm_fault+0xe68/0x1184 mm/memory.c:4551)
 r10:0000000f r9:855b7eb8 r8:86e29548 r7:8041b2ac r6:00000040 r5:00012000
 r4:00000254
[<804725a0>] (handle_mm_fault) from [<80217c1c>] (__do_page_fault arch/arm/mm/fault.c:228 [inline])
[<804725a0>] (handle_mm_fault) from [<80217c1c>] (do_page_fault+0x11c/0x378 arch/arm/mm/fault.c:296)
 r10:00000254 r9:00000000 r8:835e377c r7:835e3700 r6:80000207 r5:000120cc
 r4:855b7fb0
[<80217b00>] (do_page_fault) from [<8021810c>] (do_PrefetchAbort+0x38/0x84 arch/arm/mm/fault.c:552)
 r10:001208c0 r9:7ec6d604 r8:80217b00 r7:855b7fb0 r6:000120cc r5:00000207
 r4:82a33078
[<802180d4>] (do_PrefetchAbort) from [<80201024>] (ret_from_exception+0x0/0x1c arch/arm/kernel/entry-armv.S:716)
Exception stack(0x855b7fb0 to 0x855b7ff8)
7fa0:                                     00087b7c 00087b74 00000000 00000000
7fc0: 00000000 00000000 00000382 00120000 000003e8 7ec6d604 001208c0 7ec6d604
7fe0: 00000000 7ec6d538 000209d4 000120cc 60000010 ffffffff
 r8:30c5387d r7:30c5387d r6:ffffffff r5:60000010 r4:000120cc
Rebooting in 86400 seconds..