R13: 00000000004ca568 R14: 00000000004c1c78 R15: 0000000000000002 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 1 PID: 12926 Comm: syz-executor3 Not tainted 4.18.0-rc6-next-20180725+ #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:p9_client_prepare_req.part.8+0x392/0xa00 net/9p/client.c:652 Code: ff 0f 87 6a 02 00 00 e8 6c 8b f4 fa 0f be 85 f4 fe ff ff 4c 89 f2 48 c1 ea 03 89 85 f4 fe ff ff 48 b8 00 00 00 00 00 fc ff df <80> 3c 02 00 0f 85 89 05 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable RSP: 0018:ffff8801966375d8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002a0a000 RDX: 000000000000000a RSI: ffffffff86881c94 RDI: ffff8801bb6620b8 RBP: ffff880196637708 R08: ffff8801956440c0 R09: fffffbfff10057c6 R10: fffffbfff10057c6 R11: ffffffff8802be33 R12: ffff8801bb662080 R13: 0000000000002000 R14: 0000000000000050 R15: 000000000000002f FS: 00007fe9bfbe3700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33625000 CR3: 00000001bd4ba000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: p9_client_prepare_req net/9p/client.c:682 [inline] p9_client_rpc+0x247/0x1420 net/9p/client.c:682 p9_client_wstat+0x20e/0x310 net/9p/client.c:1768 v9fs_vfs_setattr+0x7ec/0xbc0 fs/9p/vfs_inode.c:1153 notify_change+0xc0c/0x10f0 fs/attr.c:334 chmod_common+0x2a0/0x590 fs/open.c:541 do_fchmodat+0xc3/0x160 fs/open.c:579 __do_sys_chmod fs/open.c:597 [inline] __se_sys_chmod fs/open.c:595 [inline] __x64_sys_chmod+0x5c/0x80 fs/open.c:595 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x456a09 Code: fd 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe9bfbe2c78 EFLAGS: 00000246 ORIG_RAX: 000000000000005a RAX: ffffffffffffffda RBX: 00007fe9bfbe36d4 RCX: 0000000000456a09 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000240 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016 R13: 00000000004ca568 R14: 00000000004c1c78 R15: 0000000000000002 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace a190d95cf367ab4e ]--- RIP: 0010:p9_client_prepare_req.part.8+0x392/0xa00 net/9p/client.c:652 Code: ff 0f 87 6a 02 00 00 e8 6c 8b f4 fa 0f be 85 f4 fe ff ff 4c 89 f2 48 c1 ea 03 89 85 f4 fe ff ff 48 b8 00 00 00 00 00 fc ff df <80> 3c 02 00 0f 85 89 05 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b RSP: 0018:ffff8801966375d8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002a0a000 RDX: 000000000000000a RSI: ffffffff86881c94 RDI: ffff8801bb6620b8 RBP: ffff880196637708 R08: ffff8801956440c0 R09: fffffbfff10057c6 R10: fffffbfff10057c6 R11: ffffffff8802be33 R12: ffff8801bb662080 Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable R13: 0000000000002000 R14: 0000000000000050 R15: 000000000000002f FS: 00007fe9bfbe3700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33625000 CR3: 00000001bd4ba000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400