syzbot


invalid opcode in pskb_expand_head

Status: auto-closed as invalid on 2019/07/05 10:39
Reported-by: syzbot+7070f71cb183b4a9babd@syzkaller.appspotmail.com
First crash: 1986d, last: 1986d

Sample crash report:
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 1 PID: 22082 Comm: syz-executor1 Not tainted 4.14.91+ #3
task: ffff888196128000 task.stack: ffff888168180000
RIP: 0010:pskb_expand_head+0xa7c/0xb30 net/core/skbuff.c:1452
RSP: 0018:ffff8881681878e8 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff8881d1c4c640 RCX: 0000000000000295
RDX: ffffffff822c979c RSI: ffffc90000fb6000 RDI: ffff8881d1c4c71c
RBP: 0000000001080020 R08: ffff8881d1c4c6fa R09: 00000000000005dd
R10: ffffed102d030fc3 R11: ffff888168187e1f R12: ffff8881d1c4c704
R13: 0000000000000000 R14: 000000000000003f R15: ffff8881d1c4c640
FS:  00007efdd8cc4700(0000) GS:ffff8881d7700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f591388cdb8 CR3: 0000000176f82006 CR4: 00000000001606a0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __pskb_pull_tail+0xc8/0x1390 net/core/skbuff.c:1888
 pskb_may_pull include/linux/skbuff.h:2132 [inline]
 ip_cmsg_recv_dstaddr net/ipv4/ip_sockglue.c:154 [inline]
 ip_cmsg_recv_offset+0xbcf/0xe00 net/ipv4/ip_sockglue.c:227
 ip_cmsg_recv include/net/ip.h:634 [inline]
 raw_recvmsg+0x54b/0x6c0 net/ipv4/raw.c:791
 inet_recvmsg+0x138/0x540 net/ipv4/af_inet.c:812
 sock_recvmsg_nosec net/socket.c:818 [inline]
 sock_recvmsg net/socket.c:825 [inline]
 sock_recvmsg+0xc2/0x100 net/socket.c:821
 SYSC_recvfrom net/socket.c:1814 [inline]
 SyS_recvfrom+0x1a8/0x2e0 net/socket.c:1786
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
Code: 48 8b 7c 24 18 e8 55 e1 25 ff e9 fd f6 ff ff 4c 89 f7 e8 48 e1 25 ff e9 8d fd ff ff e8 3e e1 25 ff e9 76 fc ff ff e8 e4 f4 03 ff <0f> 0b 48 8b 7c 24 18 e8 28 e1 25 ff e9 dd fa ff ff 4c 89 f7 e8 
RIP: pskb_expand_head+0xa7c/0xb30 net/core/skbuff.c:1452 RSP: ffff8881681878e8
---[ end trace 8fb1f9efd58587da ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/01/06 10:38 android-4.14 3c207c880674 53be0a37 .config console log report ci-android-414-kasan-gce-root
* Struck through repros no longer work on HEAD.