CR3 = 0x0000000000000000 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 kasan: CONFIG_KASAN_INLINE enabled RSP = 0x0000000000000000 RIP = 0x000000000000fff0 kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 10251 Comm: syz-executor4 Not tainted 4.19.0-rc7-next-20181008+ #89 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RSP = 0x0000000000000000 RIP = 0x000000000000fff0 RIP: 0010:do_fault mm/memory.c:3524 [inline] RIP: 0010:handle_pte_fault mm/memory.c:3762 [inline] RIP: 0010:__handle_mm_fault+0x2f94/0x5a40 mm/memory.c:3886 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 a5 22 00 00 49 8b 9f 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 76 22 00 00 48 8b 1b 31 ff 48 83 e3 9f 48 89 de RSP: 0018:ffff88018577e980 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88018577eab8 RBP: ffff88018577ecb0 R08: ffffed0030aefd1e R09: ffffed0030aefd1d R10: ffffed0030aefd1d R11: 0000000000000003 R12: 000ffffffffff000 R13: 0000000000000000 R14: ffff88018577ea68 R15: ffff88018577ec88 FS: 00007fa709206700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000072c000 CR3: 00000001d7e5e000 CR4: 00000000001426f0 RFLAGS=0x00000002 DR7 = 0x0000000000000400 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: CS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 DS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 RFLAGS=0x00000002 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 handle_mm_fault+0x54f/0xc70 mm/memory.c:3923 faultin_page mm/gup.c:518 [inline] __get_user_pages+0x806/0x1b30 mm/gup.c:718 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 SS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 __get_user_pages_locked mm/gup.c:889 [inline] get_user_pages_unlocked+0x2fc/0x5d0 mm/gup.c:1012 CS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 get_user_pages_fast+0x322/0x450 mm/gup.c:1862 ES: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 iov_iter_get_pages+0x2c9/0x11e0 lib/iov_iter.c:1198 DS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 CS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 FS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 SS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 GS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 __zerocopy_sg_from_iter+0x240/0xb80 net/core/datagram.c:596 ES: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 skb_zerocopy_iter_stream+0x24f/0x7d0 net/core/skbuff.c:1122 GDTR: limit=0x00000000, base=0x0000000000000000 tcp_sendmsg_locked+0x8cc/0x3fa0 net/ipv4/tcp.c:1355 LDTR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 DS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 FS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 IDTR: limit=0x00000000, base=0x0000000000000000 SS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1443 inet_sendmsg+0x19c/0x690 net/ipv4/af_inet.c:798 GS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:632 __sys_sendto+0x3d7/0x670 net/socket.c:1789 GDTR: limit=0x00000000, base=0x0000000000000000 ES: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 TR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 LDTR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 __do_sys_sendto net/socket.c:1801 [inline] __se_sys_sendto net/socket.c:1797 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1797 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 FS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 IDTR: limit=0x00000000, base=0x0000000000000000 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: 1d 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 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa709205c78 EFLAGS: 00000246 EFER = 0x0000000000000000 PAT = 0x0007040600070406 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457579 RDX: fffffffffffffee3 RSI: 0000000020000b40 RDI: 0000000000000004 RBP: 000000000072bf00 R08: 0000000000000000 R09: ffffffffffffff61 R10: 00000000040000cb R11: 0000000000000246 R12: 00007fa7092066d4 R13: 00000000004c3929 R14: 00000000004d57c0 R15: 00000000ffffffff Modules linked in: TR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 ---[ end trace 02f61405bcf11e8f ]--- GS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 RIP: 0010:do_fault mm/memory.c:3524 [inline] RIP: 0010:handle_pte_fault mm/memory.c:3762 [inline] RIP: 0010:__handle_mm_fault+0x2f94/0x5a40 mm/memory.c:3886 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 a5 22 00 00 49 8b 9f 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 76 22 00 00 48 8b 1b 31 ff 48 83 e3 9f 48 89 de EFER = 0x0000000000000000 PAT = 0x0007040600070406 RSP: 0018:ffff88018577e980 EFLAGS: 00010246 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88018577eab8 RBP: ffff88018577ecb0 R08: ffffed0030aefd1e R09: ffffed0030aefd1d R10: ffffed0030aefd1d R11: 0000000000000003 R12: 000ffffffffff000 Interruptibility = 00000000 ActivityState = 00000000 R13: 0000000000000000 R14: ffff88018577ea68 R15: ffff88018577ec88 FS: 00007fa709206700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 CR2: 000000000072c000 CR3: 00000001d7e5e000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400