syzbot


general protection fault in tcp_push

Status: auto-closed as invalid on 2019/07/05 21:43
Reported-by: syzbot+3d3180698414f1b47e8a@syzkaller.appspotmail.com
First crash: 1927d, last: 1927d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 general protection fault in tcp_push C done 55 1670d 1680d 1/1 fixed on 2019/12/09 13:28
android-44 general protection fault in tcp_push 1 1915d 1829d 0/2 auto-closed as invalid on 2019/07/17 11:58

Sample crash report:
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: 24279 Comm: syz-executor5 Not tainted 4.9.141+ #23
task: ffff8801d6c9df00 task.stack: ffff8801976b0000
RIP: 0010:[<ffffffff824d44e3>]  [<ffffffff824d44e3>] tcp_mark_push net/ipv4/tcp.c:603 [inline]
RIP: 0010:[<ffffffff824d44e3>]  [<ffffffff824d44e3>] tcp_push+0x443/0x5e0 net/ipv4/tcp.c:667
RSP: 0018:ffff8801976b7888  EFLAGS: 00010207
RAX: ffff880168d0720c RBX: ffff880168d06900 RCX: 0000000000000006
RDX: dffffc0000000000 RSI: ffffffff824d44c9 RDI: 0000000000000034
RBP: ffff8801976b78d8 R08: 000000000000fd58 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff880168d07204 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8801db600000(0063) knlGS:00000000f574ab40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00007ffe74b86e90 CR3: 000000016efad000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801976b7be0 ffff880168d0720c 0000fd584240a2a0 ffff880168d06af0
 0000021800000000 ffff880168d06af0 ffff880168d06af0 dffffc0000000000
 ffff880168d06900 ffff880168d06900 ffff8801976b7b00 ffffffff824e359b
Call Trace:
 [<ffffffff824e359b>] tcp_sendmsg+0x112b/0x2fd0 net/ipv4/tcp.c:1348
 [<ffffffff825952f3>] inet_sendmsg+0x203/0x4d0 net/ipv4/af_inet.c:770
 [<ffffffff822a063b>] sock_sendmsg_nosec net/socket.c:648 [inline]
 [<ffffffff822a063b>] sock_sendmsg+0xbb/0x110 net/socket.c:658
 [<ffffffff822a08b3>] sock_write_iter+0x223/0x3b0 net/socket.c:856
 [<ffffffff81508347>] new_sync_write fs/read_write.c:496 [inline]
 [<ffffffff81508347>] __vfs_write+0x3d7/0x580 fs/read_write.c:509
 [<ffffffff8150ab97>] vfs_write+0x187/0x520 fs/read_write.c:557
 [<ffffffff8150e9c9>] SYSC_write fs/read_write.c:604 [inline]
 [<ffffffff8150e9c9>] SyS_write+0xd9/0x1c0 fs/read_write.c:596
 [<ffffffff81006311>] do_syscall_32_irqs_on arch/x86/entry/common.c:328 [inline]
 [<ffffffff81006311>] do_fast_syscall_32+0x2f1/0xa10 arch/x86/entry/common.c:390
 [<ffffffff82818de0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Code: 00 48 8d 83 0c 09 00 00 48 89 45 b8 e8 97 75 e4 fe 49 8d 7c 24 34 48 8b 45 b8 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <0f> b6 14 11 48 89 f9 83 e1 07 38 ca 7f 08 84 d2 0f 85 81 00 00 
RIP  [<ffffffff824d44e3>] tcp_mark_push net/ipv4/tcp.c:603 [inline]
RIP  [<ffffffff824d44e3>] tcp_push+0x443/0x5e0 net/ipv4/tcp.c:667
 RSP <ffff8801976b7888>
---[ end trace 2702937cf2387ee9 ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/01/06 21:42 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 94f8adb5 .config console log report ci-android-49-kasan-gce-386
* Struck through repros no longer work on HEAD.