RBP: 00007f30c6ec8ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000b
R13: 00007ffea400601f R14: 00007f30c6ec99c0 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: 1 PID: 30673 Comm: syz-executor.1 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 f7 52 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 de 47 db
RSP: 0018:ffffc90017267c58 EFLAGS: 00010206
RAX: 0000000000000017 RBX: 00000000000000b8 RCX: 0000000000040000
RDX: ffffc90004121000 RSI: 000000000003a844 RDI: 000000000003a845
RBP: 1ffff110110a299e R08: ffffffff81c40c40 R09: ffffed1010e08e52
R10: ffffed1010e08e52 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff110110a29be R15: ffff888088514d78
FS:  00007f30c6ec9700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000078c000 CR3: 00000000a21a7000 CR4: 00000000001426e0
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
 ion_alloc drivers/staging/android/ion/ion.c:386 [inline]
 ion_ioctl+0x93f/0xfc0 drivers/staging/android/ion/ion.c:495
 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: 0033:0x45cc79
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:00007f30c6ec8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000000f400 RCX: 000000000045cc79
RDX: 00000000200001c0 RSI: 00000000c0184900 RDI: 0000000000000005
RBP: 00007f30c6ec8ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000b
R13: 00007ffea400601f R14: 00007f30c6ec99c0 R15: 000000000078bf0c
Modules linked in:
---[ end trace 008e6eb4e1f1094f ]---
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 f7 52 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 de 47 db
RSP: 0018:ffffc90017267c58 EFLAGS: 00010206
RAX: 0000000000000017 RBX: 00000000000000b8 RCX: 0000000000040000
RDX: ffffc90004121000 RSI: 000000000003a844 RDI: 000000000003a845
RBP: 1ffff110110a299e R08: ffffffff81c40c40 R09: ffffed1010e08e52
R10: ffffed1010e08e52 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff110110a29be R15: ffff888088514d78
FS:  00007f30c6ec9700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f94e7562018 CR3: 00000000a21a7000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400