RBP: 00007f28a9af2ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00007ffd37cf025f R14: 00007f28a9af39c0 R15: 000000000078bf0c
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: 14917 Comm: syz-executor.4 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+0x51/0x3f0 drivers/dma-buf/dma-buf.c:63
Code: 03 80 3c 02 00 0f 85 30 03 00 00 48 8b ad e8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bd b8 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e e3 02 00 00 8b 9d b8 00 00 00
RSP: 0018:ffffc9001979faa0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffffffff847bfcf0 RCX: ffffc90012774000
RDX: 0000000000000017 RSI: ffffffff847bfd00 RDI: 00000000000000b8
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88804ea1fb8b
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804ebde3e0
R13: ffff88804ebde368 R14: ffff88804ebde3b0 R15: 0000000000000000
FS:  00007f28a9af3700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000b90004 CR3: 000000004c797000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __dentry_kill+0x42b/0x640 fs/dcache.c:584
 dentry_kill fs/dcache.c:705 [inline]
 dput+0x725/0xbc0 fs/dcache.c:878
 path_put+0x2d/0x60 fs/namei.c:496
 alloc_file_pseudo+0x20d/0x250 fs/file_table.c:236
 dma_buf_getfile drivers/dma-buf/dma-buf.c:441 [inline]
 dma_buf_export+0x5f7/0xb00 drivers/dma-buf/dma-buf.c:558
 udmabuf_create+0xb9d/0xe30 drivers/dma-buf/udmabuf.c:228
 udmabuf_ioctl_create_list drivers/dma-buf/udmabuf.c:284 [inline]
 udmabuf_ioctl+0x265/0x2c0 drivers/dma-buf/udmabuf.c:299
 vfs_ioctl fs/ioctl.c:48 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:753
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl fs/ioctl.c:760 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cc79
Code: 2d 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 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f28a9af2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000019480 RCX: 000000000045cc79
RDX: 0000000020000080 RSI: 0000000040087543 RDI: 0000000000000003
RBP: 00007f28a9af2ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00007ffd37cf025f R14: 00007f28a9af39c0 R15: 000000000078bf0c
Modules linked in:
---[ end trace d87a3d648f0822ca ]---
RIP: 0010:dma_buf_release+0x51/0x3f0 drivers/dma-buf/dma-buf.c:63
Code: 03 80 3c 02 00 0f 85 30 03 00 00 48 8b ad e8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bd b8 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e e3 02 00 00 8b 9d b8 00 00 00
RSP: 0018:ffffc9001979faa0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffffffff847bfcf0 RCX: ffffc90012774000
RDX: 0000000000000017 RSI: ffffffff847bfd00 RDI: 00000000000000b8
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88804ea1fb8b
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804ebde3e0
R13: ffff88804ebde368 R14: ffff88804ebde3b0 R15: 0000000000000000
FS:  00007f28a9af3700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f887a197000 CR3: 000000004c797000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400