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kernel BUG at mm/memory.c:2220!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 21481 Comm: syz-executor.1 Not tainted 6.1.53-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : vmf_insert_pfn_prot+0x2bc/0x2d0 mm/memory.c:2220
lr : vmf_insert_pfn_prot+0x2bc/0x2d0 mm/memory.c:2220
sp : ffff80001e116fb0
x29: ffff80001e116fb0 x28: ffff80001e117260 x27: ffff0000cd950000
x26: 0000000010000400 x25: 0000000004040471 x24: dfff800000000000
x23: 0000000000000420 x22: 000000000010b5a5 x21: ffff0000d936ea20
x20: 0000000020000000 x19: 0060000000000fc3 x18: ffff80001e116b60
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000002 x13: 0000000010000400 x12: 0000000000040000
x11: 0000000000000cf6 x10: ffff8000223c9000 x9 : ffff800008850848
x8 : 0000000000000cf7 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff800018c628b8 x4 : 0000000000000002 x3 : 0060000000000fc3
x2 : 000000000010b5a5 x1 : 0000000000000420 x0 : 0000000000000420
Call trace:
 vmf_insert_pfn_prot+0x2bc/0x2d0 mm/memory.c:2220
 vmf_insert_pfn+0x54/0x68 mm/memory.c:2259
 drm_gem_shmem_fault+0x1ac/0x21c drivers/gpu/drm/drm_gem_shmem_helper.c:562
 __do_fault+0x11c/0x3d8 mm/memory.c:4231
 do_read_fault mm/memory.c:4582 [inline]
 do_fault mm/memory.c:4711 [inline]
 handle_pte_fault mm/memory.c:4983 [inline]
 __handle_mm_fault mm/memory.c:5125 [inline]
 handle_mm_fault+0x1f68/0x3e9c mm/memory.c:5246
 __do_page_fault arch/arm64/mm/fault.c:499 [inline]
 do_page_fault+0x330/0x890 arch/arm64/mm/fault.c:583
 do_translation_fault+0x94/0xc8 arch/arm64/mm/fault.c:667
 do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:803
 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367
 el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:427
 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:576
 __arch_copy_from_user+0x180/0x230 arch/arm64/lib/copy_template.S:146
 copy_page_from_iter+0x1f8/0x2f8 lib/iov_iter.c:752
 tun_build_skb drivers/net/tun.c:1675 [inline]
 tun_get_user+0x17cc/0x386c drivers/net/tun.c:1811
 tun_chr_write_iter+0xfc/0x204 drivers/net/tun.c:2037
 call_write_iter include/linux/fs.h:2205 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x610/0x914 fs/read_write.c:584
 ksys_write+0x15c/0x26c fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
Code: d4210000 97f2aca2 d4210000 97f2aca0 (d4210000) 
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