general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 1 PID: 29674 Comm: syz-executor.2 Not tainted 5.8.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:qrtr_endpoint_post+0x92/0x1010 net/qrtr/qrtr.c:440
Code: 44 89 e6 e8 80 51 50 fe 48 85 c0 48 89 c5 0f 84 c4 0e 00 00 e8 ef 6b 96 f9 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 48 89 da 83 e2 07 38 d0 7f 08 84 c0 0f 85 4a 0d 00 00
RSP: 0018:ffffc90017e4f9d0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffc9000e0a2000
RDX: 0000000000000002 RSI: ffffffff87dce501 RDI: ffff88809d883010
RBP: ffff88809d883000 R08: 0000000000000001 R09: ffff888039518e63
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88806930b600 R14: ffffc90017e4fc40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:00000000f5de4b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000030421000 CR3: 0000000091d3d000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 qrtr_tun_write_iter+0xf5/0x180 net/qrtr/tun.c:92
 call_write_iter include/linux/fs.h:1907 [inline]
 new_sync_write+0x422/0x650 fs/read_write.c:484
 __vfs_write+0xc9/0x100 fs/read_write.c:497
 __kernel_write+0x11c/0x3a0 fs/read_write.c:516
 write_pipe_buf+0x153/0x1f0 fs/splice.c:799
 splice_from_pipe_feed fs/splice.c:502 [inline]
 __splice_from_pipe+0x3dc/0x830 fs/splice.c:626
 splice_from_pipe fs/splice.c:661 [inline]
 default_file_splice_write fs/splice.c:811 [inline]
 do_splice_from fs/splice.c:847 [inline]
 do_splice+0x12a2/0x1820 fs/splice.c:1144
 __do_sys_splice fs/splice.c:1419 [inline]
 __se_sys_splice fs/splice.c:1401 [inline]
 __ia32_sys_splice+0x195/0x250 fs/splice.c:1401
 do_syscall_32_irqs_on+0x3f/0x60 arch/x86/entry/common.c:403
 __do_fast_syscall_32 arch/x86/entry/common.c:448 [inline]
 do_fast_syscall_32+0x7f/0x120 arch/x86/entry/common.c:474
 entry_SYSENTER_compat+0x6d/0x7c arch/x86/entry/entry_64_compat.S:138
RIP: 0023:0xf7fe9569
Code: Bad RIP value.
RSP: 002b:00000000f5de40cc EFLAGS: 00000296 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000010003
RBP: 0000000000000007 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace c9e89bc4e4973f4c ]---
RIP: 0010:qrtr_endpoint_post+0x92/0x1010 net/qrtr/qrtr.c:440
Code: 44 89 e6 e8 80 51 50 fe 48 85 c0 48 89 c5 0f 84 c4 0e 00 00 e8 ef 6b 96 f9 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 48 89 da 83 e2 07 38 d0 7f 08 84 c0 0f 85 4a 0d 00 00
RSP: 0018:ffffc90017e4f9d0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffc9000e0a2000
RDX: 0000000000000002 RSI: ffffffff87dce501 RDI: ffff88809d883010
RBP: ffff88809d883000 R08: 0000000000000001 R09: ffff888039518e63
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88806930b600 R14: ffffc90017e4fc40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:00000000f5de4b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000558f4e63b4e0 CR3: 0000000091d3d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400