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WARNING: CPU: 0 PID: 22177 at drivers/gpu/drm/drm_gem_shmem_helper.c:562 drm_gem_shmem_vm_open+0x96/0xb0 drivers/gpu/drm/drm_gem_shmem_helper.c:562
Modules linked in:
CPU: 0 PID: 22177 Comm: syz-executor.2 Not tainted 5.14.0-next-20210910-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:drm_gem_shmem_vm_open+0x96/0xb0 drivers/gpu/drm/drm_gem_shmem_helper.c:562
Code: 89 c6 e8 5d 51 23 fd 85 db 75 1a e8 14 4a 23 fd 48 89 ef 5b 5d 41 5c e9 d8 66 f5 ff e8 03 4a 23 fd 0f 0b eb ca e8 fa 49 23 fd <0f> 0b eb dd e8 d1 6d 69 fd eb 89 e8 ca 6d 69 fd eb a8 0f 1f 84 00
RSP: 0018:ffffc90017357b98 EFLAGS: 00010216
RAX: 0000000000000137 RBX: 00000000fffffffc RCX: ffffc9000df65000
RDX: 0000000000040000 RSI: ffffffff8452c426 RDI: 0000000000000003
RBP: ffff88801a99ec60 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8452c403 R11: 0000000000000001 R12: ffff888016516800
R13: ffff88801a99ed68 R14: 0000000020166000 R15: ffff88801a99ecf0
FS:  00007fca179bf700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005422b8 CR3: 00000000717dd000 CR4: 00000000001526e0
Call Trace:
 __split_vma+0x23c/0x550 mm/mmap.c:2737
 __do_munmap+0x32a/0x11c0 mm/mmap.c:2841
 do_munmap mm/mmap.c:2895 [inline]
 munmap_vma_range mm/mmap.c:603 [inline]
 mmap_region+0x2fd/0x1650 mm/mmap.c:1742
 do_mmap+0x869/0xfb0 mm/mmap.c:1575
 vm_mmap_pgoff+0x1b7/0x290 mm/util.c:519
 ksys_mmap_pgoff+0x49f/0x620 mm/mmap.c:1624
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
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:00007fca179bf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000002000 RDI: 0000000020166000
RBP: 00000000004bfcc4 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000013 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffebdfbb49f R14: 00007fca179bf300 R15: 0000000000022000