RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 00000000000005c7 R14: 00000000004c89fa R15: 00007f216f7986d4
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: 10049 Comm: syz-executor.0 Not tainted 5.8.0-rc4-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 47 8b 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 90 db
RSP: 0018:ffffc90007677bd8 EFLAGS: 00010206
RAX: 0000000000000017 RBX: 00000000000000b8 RCX: 0000000000040000
RDX: ffffc90001859000 RSI: 0000000000032a21 RDI: 0000000000032a22
RBP: 1ffff1101163148a R08: ffffffff81c3e230 R09: ffffed1008d60362
R10: ffffed1008d60362 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff110116314aa R15: ffff88808b18a4d8
FS:  00007f216f798700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000740914 CR3: 0000000047422000 CR4: 00000000001406f0
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:439 [inline]
 dma_buf_export+0x56c/0x8b0 drivers/dma-buf/dma-buf.c:555
 udmabuf_create+0x6e4/0xb40 drivers/dma-buf/udmabuf.c:228
 udmabuf_ioctl_create_list drivers/dma-buf/udmabuf.c:284 [inline]
 udmabuf_ioctl+0x295/0x360 drivers/dma-buf/udmabuf.c:299
 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: 0033:0x45cba9
Code: Bad RIP value.
RSP: 002b:00007f216f797c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004f0c20 RCX: 000000000045cba9
RDX: 0000000020000240 RSI: 0000000040087543 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 00000000000005c7 R14: 00000000004c89fa R15: 00007f216f7986d4
Modules linked in:
---[ end trace 284ccb867cdb3b71 ]---
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 47 8b 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 90 db
RSP: 0018:ffffc90007677bd8 EFLAGS: 00010206
RAX: 0000000000000017 RBX: 00000000000000b8 RCX: 0000000000040000
RDX: ffffc90001859000 RSI: 0000000000032a21 RDI: 0000000000032a22
RBP: 1ffff1101163148a R08: ffffffff81c3e230 R09: ffffed1008d60362
R10: ffffed1008d60362 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff110116314aa R15: ffff88808b18a4d8
FS:  00007f216f798700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0649fb8000 CR3: 0000000047422000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400