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 kobject: 'loop1' (000000009c51ef52): kobject_uevent_env CPU: 0 PID: 11427 Comm: syz-executor5 Not tainted 4.19.0-rc7-next-20181011+ #92 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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:ffff88018374ef40 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88018374f078 RBP: ffff88018374f270 R08: ffffed00306e9dd6 R09: ffffed00306e9dd5 R10: ffffed00306e9dd5 R11: 0000000000000003 R12: 000ffffffffff000 R13: 0000000000000000 R14: ffff88018374f028 R15: ffff88018374f248 FS: 00007fec79c8c700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop1' (000000009c51ef52): fill_kobj_path: path = '/devices/virtual/block/loop1' CR2: 0000000020074000 CR3: 00000001d8380000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: handle_mm_fault+0x54f/0xc70 mm/memory.c:3923 __do_page_fault+0x567/0xd10 arch/x86/mm/fault.c:1355 do_page_fault+0xed/0x7d1 arch/x86/mm/fault.c:1430 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff88018374f5b0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000000007a50 RCX: 0000000000004b40 RDX: 0000000000007a50 RSI: 0000000020074000 RDI: ffff880182ffaf10 RBP: ffff88018374f5e8 R08: ffffed00305fff4a R09: ffffed00305fff4a R10: ffffed00305fff49 R11: ffff880182fffa4f R12: 0000000020078b40 R13: 00000000200710f0 R14: ffff880182ff8000 R15: 00007ffffffff000 _copy_from_iter_full+0x263/0xc20 lib/iov_iter.c:724 copy_from_iter_full include/linux/uio.h:124 [inline] skb_do_copy_data_nocache include/net/sock.h:1951 [inline] skb_copy_to_page_nocache include/net/sock.h:1977 [inline] tcp_sendmsg_locked+0x159e/0x3fa0 net/ipv4/tcp.c:1338 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1443 inet_sendmsg+0x19c/0x690 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:632 __sys_sendto+0x3d7/0x670 net/socket.c:1789 __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 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457519 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:00007fec79c8bc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457519 RDX: fffffffffffffee3 RSI: 0000000020000b40 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: ffffffffffffff61 R10: 00000000040000cb R11: 0000000000000246 R12: 00007fec79c8c6d4 R13: 00000000004c38c8 R14: 00000000004d5760 R15: 00000000ffffffff Modules linked in: ---[ end trace 64a4e400e9ec5ee8 ]--- 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:ffff88018374ef40 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88018374f078 RBP: ffff88018374f270 R08: ffffed00306e9dd6 R09: ffffed00306e9dd5 R10: ffffed00306e9dd5 R11: 0000000000000003 R12: 000ffffffffff000 R13: 0000000000000000 R14: ffff88018374f028 R15: ffff88018374f248 FS: 00007fec79c8c700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020074000 CR3: 00000001d8380000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400