general protection fault, probably for non-canonical address 0xdffffc0000000017: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000b8-0x00000000000000bf]
CPU: 1 PID: 4491 Comm: syz-executor.1 Not tainted 5.9.0-rc1-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 d7 5f 17 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 ae 8b d7
RSP: 0018:ffffc90015437ab8 EFLAGS: 00010206
RAX: 0000000000000017 RBX: 00000000000000b8 RCX: 0000000000040000
RDX: ffffc9000a349000 RSI: 000000000003ca91 RDI: 000000000003ca92
RBP: dffffc0000000000 R08: ffffffff81c57840 R09: ffffed1010988f9a
R10: ffffed1010988f9a R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff110109eac08 R15: ffff888084f560d0
FS:  00007fde8083e700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd709d2630 CR3: 000000009ebeb000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __dentry_kill+0x41f/0x5b0 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
 drm_gem_dmabuf_export+0x42/0x170 drivers/gpu/drm/drm_prime.c:246
 drm_gem_prime_export drivers/gpu/drm/drm_prime.c:851 [inline]
 export_and_register_object drivers/gpu/drm/drm_prime.c:392 [inline]
 drm_gem_prime_handle_to_fd+0x6b6/0x7c0 drivers/gpu/drm/drm_prime.c:460
 drm_ioctl_kernel+0x2f3/0x430 drivers/gpu/drm/drm_ioctl.c:787
 drm_ioctl+0x585/0x910 drivers/gpu/drm/drm_ioctl.c:887
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:739
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d4d9
Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fde8083dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000000cb80 RCX: 000000000045d4d9
RDX: 0000000020000040 RSI: 00000000c00c642d RDI: 0000000000000004
RBP: 00007fde8083dca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00007ffcc8daaebf R14: 00007fde8083e9c0 R15: 000000000118cf4c
Modules linked in:
---[ end trace 35a43672d1c2ee39 ]---
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 d7 5f 17 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 ae 8b d7
RSP: 0018:ffffc90015437ab8 EFLAGS: 00010206
RAX: 0000000000000017 RBX: 00000000000000b8 RCX: 0000000000040000
RDX: ffffc9000a349000 RSI: 000000000003ca91 RDI: 000000000003ca92
RBP: dffffc0000000000 R08: ffffffff81c57840 R09: ffffed1010988f9a
R10: ffffed1010988f9a R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff110109eac08 R15: ffff888084f560d0
FS:  00007fde8083e700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f796d92a018 CR3: 000000009ebeb000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400