------------[ cut here ]------------
WARNING: CPU: 1 PID: 25997 at drivers/gpu/drm/drm_gem_shmem_helper.c:562 drm_gem_shmem_vm_open+0x6c/0x80 drivers/gpu/drm/drm_gem_shmem_helper.c:559
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 25997 Comm: syz-executor.2 Not tainted 5.9.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x99/0xd0 lib/dump_stack.c:118
 panic+0x2a9/0x532 kernel/panic.c:231
 __warn.cold.12+0x25/0x32 kernel/panic.c:600
 report_bug+0x1af/0x260 lib/bug.c:198
 handle_bug+0x3f/0x70 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:drm_gem_shmem_vm_open+0x6c/0x80 drivers/gpu/drm/drm_gem_shmem_helper.c:562
Code: 80 3c 02 00 75 2f 48 83 bd 30 01 00 00 00 75 16 48 89 ef e8 76 ef ff ff 85 c0 75 0e 48 89 df 5b 5d e9 28 43 f6 ff 0f 0b eb e6 <0f> 0b eb ee e8 7b 40 a3 fd eb ac e8 74 40 a3 fd eb ca 66 90 48 b8
RSP: 0018:ffffc9000219fbc0 EFLAGS: 00010286
RAX: 00000000fffffffc RBX: ffff888087988b58 RCX: 0000000000000000
RDX: fffff52000433f48 RSI: 1ffff110148fa7bd RDI: ffffffff8eb2eee0
RBP: ffff8880abdf0000 R08: fffffbfff19736a2 R09: fffffbfff19736a2
R10: ffffc9000219fb90 R11: fffffbfff19736a1 R12: 0000000020166000
R13: 0000000000000000 R14: ffffffff890ff860 R15: ffff888087988be8
 __split_vma+0x1d1/0x490 mm/mmap.c:2721
 __do_munmap+0x241/0x1090 mm/mmap.c:2814
 do_munmap mm/mmap.c:2877 [inline]
 mmap_region+0x126/0x1370 mm/mmap.c:1716
 do_mmap+0x5eb/0x10e0 mm/mmap.c:1545
 vm_mmap_pgoff+0x16a/0x1c0 mm/util.c:506
 ksys_mmap_pgoff+0x389/0x570 mm/mmap.c:1596
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4665e9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5755549188 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000000002000 RDI: 0000000020166000
RBP: 00000000004bfcc4 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000013 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffd3b23f3cf R14: 00007f5755549300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..