general protection fault, probably for non-canonical address 0xdffffc0000000017: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000b8-0x00000000000000bf]
CPU: 0 PID: 15429 Comm: syz-executor.0 Not tainted 5.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:dma_buf_release+0x4b/0x310 drivers/dma-buf/dma-buf.c:63
Code: 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 17 53 1a fd 4c 8b 23 49 8d 9c 24 b8 00 00 00 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 4b 02 00 00 8b 1b 31 ff 89 de e8 0e 48 db
RSP: 0018:ffffc900090679c0 EFLAGS: 00010206
RAX: 0000000000000017 RBX: 00000000000000b8 RCX: 0000000000040000
RDX: ffffc90002569000 RSI: 000000000003cd45 RDI: 000000000003cd46
RBP: 1ffff11006fb982e R08: ffffffff81c40c30 R09: ffffed100764d0d2
R10: ffffed100764d0d2 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff11006fb984e R15: ffff888037dcc1f8
FS:  00007f6b36b36700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000095250000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __dentry_kill+0x43f/0x5d0 fs/dcache.c:584
 dentry_kill fs/dcache.c:692 [inline]
 dput+0x45e/0x710 fs/dcache.c:878
 path_put+0x35/0x60 fs/namei.c:496
 alloc_file_pseudo+0x1d2/0x240 fs/file_table.c:236
 dma_buf_getfile drivers/dma-buf/dma-buf.c:441 [inline]
 dma_buf_export+0x5d7/0x970 drivers/dma-buf/dma-buf.c:558
 vb2_vmalloc_get_dmabuf+0x119/0x1e0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:358
 vb2_core_expbuf+0x38a/0x5c0 drivers/media/common/videobuf2/videobuf2-core.c:2123
 __video_do_ioctl+0xaf5/0xcd0 drivers/media/v4l2-core/v4l2-ioctl.c:2986
 video_usercopy+0x939/0x1d90 drivers/media/v4l2-core/v4l2-ioctl.c:3298
 v4l2_ioctl+0x163/0x1a0 drivers/media/v4l2-core/v4l2-dev.c:360
 vfs_ioctl fs/ioctl.c:48 [inline]
 ksys_ioctl fs/ioctl.c:753 [inline]
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:760
 do_syscall_64+0x73/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c429
Code: 8d b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6b36b35c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000001ad40 RCX: 000000000045c429
RDX: 0000000020000040 RSI: 00000000c0405610 RDI: 0000000000000003
RBP: 00007f6b36b35ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00007ffde71d8c1f R14: 00007f6b36b369c0 R15: 000000000078bf0c
Modules linked in:
---[ end trace 070a2fc416ca1f74 ]---
RIP: 0010:dma_buf_release+0x4b/0x310 drivers/dma-buf/dma-buf.c:63
Code: 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 17 53 1a fd 4c 8b 23 49 8d 9c 24 b8 00 00 00 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 4b 02 00 00 8b 1b 31 ff 89 de e8 0e 48 db
RSP: 0018:ffffc900090679c0 EFLAGS: 00010206
RAX: 0000000000000017 RBX: 00000000000000b8 RCX: 0000000000040000
RDX: ffffc90002569000 RSI: 000000000003cd45 RDI: 000000000003cd46
RBP: 1ffff11006fb982e R08: ffffffff81c40c30 R09: ffffed100764d0d2
R10: ffffed100764d0d2 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff11006fb984e R15: ffff888037dcc1f8
FS:  00007f6b36b36700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3961b89000 CR3: 0000000095250000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400