general protection fault in rds_recv_rcvbuf

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	general protection fault in rds_recv_rcvbuf_delta	C		done	7	1942d	1989d	1/1	fixed on 2019/12/02 18:09
upstream	general protection fault in rds_recv_rcvbuf_delta rds	C	done		35	1974d	2201d	13/28	fixed on 2019/10/09 10:54

kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 10636 Comm: syz-executor.3 Not tainted 4.14.163-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880437624c0 task.stack: ffff888043620000 RIP: 0010:rds_recv_rcvbuf_delta.part.0+0x134/0x3c0 net/rds/recv.c:108 RSP: 0018:ffff8880436277a8 EFLAGS: 00010007 RAX: dffffc0000000000 RBX: ffff8880437f0e40 RCX: ffffc90008e3c000 RDX: 0000000000000005 RSI: ffffffff85fbeb75 RDI: 000000000000002c RBP: ffff8880436277e8 R08: 1ffff110120192c6 R09: ffffffff895917c8 R10: ffff888043762d40 R11: ffff8880437624c0 R12: 0000000000000000 R13: ffff8880437f1324 R14: 000000000002c9c0 R15: ffff888098ffa600 FS: 00007f7c067cd700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2bf22000 CR3: 000000009f903000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rds_recv_rcvbuf_delta net/rds/recv.c:382 [inline] rds_recv_incoming+0x652/0x1020 net/rds/recv.c:382 rds_loop_xmit+0x147/0x320 net/rds/loop.c:82 rds_send_xmit+0xd2c/0x1cd0 net/rds/send.c:349 rds_sendmsg+0x2fb/0x1db0 net/rds/send.c:1197 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xce/0x110 net/socket.c:656 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062 __sys_sendmsg+0xb9/0x140 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2103 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45af49 RSP: 002b:00007f7c067ccc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045af49 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7c067cd6d4 R13: 00000000004caa25 R14: 00000000004e3ea8 R15: 00000000ffffffff Code: 48 c1 ea 03 80 3c 02 00 0f 85 45 02 00 00 4c 8b a3 80 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 2c 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 RIP: rds_recv_rcvbuf_delta.part.0+0x134/0x3c0 net/rds/recv.c:108 RSP: ffff8880436277a8 ---[ end trace ee95b14c6126711c ]---