[Qemu-devel] [Bug 1643619] Re: netlink broken on big-endian mips
** Changed in: qemu
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1643619
Title:
netlink broken on big-endian mips
Status in QEMU:
Fix Released
Bug description:
Debian QEMU version 2.7.0, but the bug also appears in current git
master (commit c36ed06e9159)
As the summary says, netlink is completely broken on big-endian mips
running qemu-user.
Running 'ip route' from within a Debian chroot with QEMU simply hangs.
Running amd64 strace on qemu-mips-static shows that it's waiting for a
netlink response from the kernel which never comes.
[...]
[pid 11249] socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE) = 3
[pid 11249] setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
[pid 11249] setsockopt(3, SOL_SOCKET, SO_RCVBUF, [1048576], 4) = 0
[pid 11249] bind(3, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=}, 12)
= 0
[pid 11249] getsockname(3, {sa_family=AF_NETLINK, nl_pid=11249,
nl_groups=}, [12]) = 0
[pid 11249] time([1479745823]) = 1479745823
[pid 11249] sendto(3, {{len=671088640, type=0x1a00 /* NLMSG_??? */,
flags=NLM_F_REQUEST|NLM_F_MULTI|0x100, seq=539046744, pid=0},
"\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\10\0\35\0\0\0\1"}, 40, 0, NULL, 0) = 40
[pid 11249] recvmsg(3,
Notice the len in the buffer passed to the kernel is 0x2800 which
looks byteswapped.
Removing the call to fd_trans_unregister in the NR_socket syscall in
do_syscall fixes this for me, but I don't understand why the fd
translation was immediately unregistered after being registered just
before in do_socket - presumably it was added for a reason.
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9331,7 +9331,6 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
#ifdef TARGET_NR_socket
case TARGET_NR_socket:
ret = do_socket(arg1, arg2, arg3);
-fd_trans_unregister(ret);
break;
#endif
#ifdef TARGET_NR_socketpair
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[Qemu-devel] [Bug 1643619] Re: netlink broken on big-endian mips
This has been fixed by 40493c5f2b0f124c9b2581e539bba14522e51269, which
is exactly the same diff as given here.
** Changed in: qemu
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1643619
Title:
netlink broken on big-endian mips
Status in QEMU:
Fix Committed
Bug description:
Debian QEMU version 2.7.0, but the bug also appears in current git
master (commit c36ed06e9159)
As the summary says, netlink is completely broken on big-endian mips
running qemu-user.
Running 'ip route' from within a Debian chroot with QEMU simply hangs.
Running amd64 strace on qemu-mips-static shows that it's waiting for a
netlink response from the kernel which never comes.
[...]
[pid 11249] socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE) = 3
[pid 11249] setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
[pid 11249] setsockopt(3, SOL_SOCKET, SO_RCVBUF, [1048576], 4) = 0
[pid 11249] bind(3, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=}, 12)
= 0
[pid 11249] getsockname(3, {sa_family=AF_NETLINK, nl_pid=11249,
nl_groups=}, [12]) = 0
[pid 11249] time([1479745823]) = 1479745823
[pid 11249] sendto(3, {{len=671088640, type=0x1a00 /* NLMSG_??? */,
flags=NLM_F_REQUEST|NLM_F_MULTI|0x100, seq=539046744, pid=0},
"\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\10\0\35\0\0\0\1"}, 40, 0, NULL, 0) = 40
[pid 11249] recvmsg(3,
Notice the len in the buffer passed to the kernel is 0x2800 which
looks byteswapped.
Removing the call to fd_trans_unregister in the NR_socket syscall in
do_syscall fixes this for me, but I don't understand why the fd
translation was immediately unregistered after being registered just
before in do_socket - presumably it was added for a reason.
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9331,7 +9331,6 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
#ifdef TARGET_NR_socket
case TARGET_NR_socket:
ret = do_socket(arg1, arg2, arg3);
-fd_trans_unregister(ret);
break;
#endif
#ifdef TARGET_NR_socketpair
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[Qemu-devel] [Bug 1643619] Re: netlink broken on big-endian mips
Patch applied by James works for me as well. Dropping a qemu-user static
binary from Debian qemu 2.1 into the mips chroot can also be used as
workaround.
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https://bugs.launchpad.net/bugs/1643619
Title:
netlink broken on big-endian mips
Status in QEMU:
New
Bug description:
Debian QEMU version 2.7.0, but the bug also appears in current git
master (commit c36ed06e9159)
As the summary says, netlink is completely broken on big-endian mips
running qemu-user.
Running 'ip route' from within a Debian chroot with QEMU simply hangs.
Running amd64 strace on qemu-mips-static shows that it's waiting for a
netlink response from the kernel which never comes.
[...]
[pid 11249] socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE) = 3
[pid 11249] setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
[pid 11249] setsockopt(3, SOL_SOCKET, SO_RCVBUF, [1048576], 4) = 0
[pid 11249] bind(3, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=}, 12)
= 0
[pid 11249] getsockname(3, {sa_family=AF_NETLINK, nl_pid=11249,
nl_groups=}, [12]) = 0
[pid 11249] time([1479745823]) = 1479745823
[pid 11249] sendto(3, {{len=671088640, type=0x1a00 /* NLMSG_??? */,
flags=NLM_F_REQUEST|NLM_F_MULTI|0x100, seq=539046744, pid=0},
"\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\10\0\35\0\0\0\1"}, 40, 0, NULL, 0) = 40
[pid 11249] recvmsg(3,
Notice the len in the buffer passed to the kernel is 0x2800 which
looks byteswapped.
Removing the call to fd_trans_unregister in the NR_socket syscall in
do_syscall fixes this for me, but I don't understand why the fd
translation was immediately unregistered after being registered just
before in do_socket - presumably it was added for a reason.
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9331,7 +9331,6 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
#ifdef TARGET_NR_socket
case TARGET_NR_socket:
ret = do_socket(arg1, arg2, arg3);
-fd_trans_unregister(ret);
break;
#endif
#ifdef TARGET_NR_socketpair
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[Qemu-devel] [Bug 1643619] Re: netlink broken on big-endian mips
Same here. While running qemu-debootstrap using Debian qemu 2.7,
debootstrap hangs on groupadd calls. Reproduction on amd64 host, running
jessie, on a failed qemu-debootstrap but sufficiently working jessie
mips chroot. See attached strace of groupadd. Problem reproduces with
compiled qemu from git master, commit
00227fefd2059464cd2f59aed29944874c630e2f.
...
[pid 31008] socket(PF_NETLINK, SOCK_RAW, NETLINK_AUDIT) = 3
[pid 31008] fcntl(3, F_SETFD, FD_CLOEXEC) = 0
...
[pid 31008] sendto(3, "\0\0\0x\4\\\0\5\0\0\0\1\0\0\0\0op=adding group "...,
120, 0, {sa_family=AF_NETLINK, pid=0, groups=}, 12) = 120
[pid 31008] ppoll([{fd=3, events=POLLIN}], 1, {0, 5}, NULL, 0) = 0
(Timeout)
[pid 31008] recvfrom(3, 0x7facef9e1504, 8988, 66, 0x7fff0138c9b0,
0x7fff0138c9f4) = -1 EAGAIN (Resource temporarily unavailable)
[pid 31008] ppoll([{fd=3, events=POLLIN}], 1, {0, 5}, NULL, 0) = 0
(Timeout)
[pid 31008] recvfrom(3, 0x7facef9e1504, 8988, 66, 0x7fff0138c9b0,
0x7fff0138c9f4) = -1 EAGAIN (Resource temporarily unavailable)
...etc ... etc...
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https://bugs.launchpad.net/bugs/1643619
Title:
netlink broken on big-endian mips
Status in QEMU:
New
Bug description:
Debian QEMU version 2.7.0, but the bug also appears in current git
master (commit c36ed06e9159)
As the summary says, netlink is completely broken on big-endian mips
running qemu-user.
Running 'ip route' from within a Debian chroot with QEMU simply hangs.
Running amd64 strace on qemu-mips-static shows that it's waiting for a
netlink response from the kernel which never comes.
[...]
[pid 11249] socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE) = 3
[pid 11249] setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
[pid 11249] setsockopt(3, SOL_SOCKET, SO_RCVBUF, [1048576], 4) = 0
[pid 11249] bind(3, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=}, 12)
= 0
[pid 11249] getsockname(3, {sa_family=AF_NETLINK, nl_pid=11249,
nl_groups=}, [12]) = 0
[pid 11249] time([1479745823]) = 1479745823
[pid 11249] sendto(3, {{len=671088640, type=0x1a00 /* NLMSG_??? */,
flags=NLM_F_REQUEST|NLM_F_MULTI|0x100, seq=539046744, pid=0},
"\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\10\0\35\0\0\0\1"}, 40, 0, NULL, 0) = 40
[pid 11249] recvmsg(3,
Notice the len in the buffer passed to the kernel is 0x2800 which
looks byteswapped.
Removing the call to fd_trans_unregister in the NR_socket syscall in
do_syscall fixes this for me, but I don't understand why the fd
translation was immediately unregistered after being registered just
before in do_socket - presumably it was added for a reason.
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9331,7 +9331,6 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
#ifdef TARGET_NR_socket
case TARGET_NR_socket:
ret = do_socket(arg1, arg2, arg3);
-fd_trans_unregister(ret);
break;
#endif
#ifdef TARGET_NR_socketpair
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[Qemu-devel] [Bug 1643619] Re: netlink broken on big-endian mips
Strace jessie mips groupadd.
** Attachment added: "jessie_mips_groupadd.strace"
https://bugs.launchpad.net/qemu/+bug/1643619/+attachment/4783716/+files/jessie_mips_groupadd.strace
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https://bugs.launchpad.net/bugs/1643619
Title:
netlink broken on big-endian mips
Status in QEMU:
New
Bug description:
Debian QEMU version 2.7.0, but the bug also appears in current git
master (commit c36ed06e9159)
As the summary says, netlink is completely broken on big-endian mips
running qemu-user.
Running 'ip route' from within a Debian chroot with QEMU simply hangs.
Running amd64 strace on qemu-mips-static shows that it's waiting for a
netlink response from the kernel which never comes.
[...]
[pid 11249] socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE) = 3
[pid 11249] setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
[pid 11249] setsockopt(3, SOL_SOCKET, SO_RCVBUF, [1048576], 4) = 0
[pid 11249] bind(3, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=}, 12)
= 0
[pid 11249] getsockname(3, {sa_family=AF_NETLINK, nl_pid=11249,
nl_groups=}, [12]) = 0
[pid 11249] time([1479745823]) = 1479745823
[pid 11249] sendto(3, {{len=671088640, type=0x1a00 /* NLMSG_??? */,
flags=NLM_F_REQUEST|NLM_F_MULTI|0x100, seq=539046744, pid=0},
"\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\10\0\35\0\0\0\1"}, 40, 0, NULL, 0) = 40
[pid 11249] recvmsg(3,
Notice the len in the buffer passed to the kernel is 0x2800 which
looks byteswapped.
Removing the call to fd_trans_unregister in the NR_socket syscall in
do_syscall fixes this for me, but I don't understand why the fd
translation was immediately unregistered after being registered just
before in do_socket - presumably it was added for a reason.
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9331,7 +9331,6 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
#ifdef TARGET_NR_socket
case TARGET_NR_socket:
ret = do_socket(arg1, arg2, arg3);
-fd_trans_unregister(ret);
break;
#endif
#ifdef TARGET_NR_socketpair
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[Qemu-devel] [Bug 1643619] Re: netlink broken on big-endian mips
I also notice fd_trans_unregister does not appear in the socketcall
implementation which seems like an oversight.
--
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https://bugs.launchpad.net/bugs/1643619
Title:
netlink broken on big-endian mips
Status in QEMU:
New
Bug description:
Debian QEMU version 2.7.0, but the bug also appears in current git
master (commit c36ed06e9159)
As the summary says, netlink is completely broken on big-endian mips
running qemu-user.
Running 'ip route' from within a Debian chroot with QEMU simply hangs.
Running amd64 strace on qemu-mips-static shows that it's waiting for a
netlink response from the kernel which never comes.
[...]
[pid 11249] socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE) = 3
[pid 11249] setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
[pid 11249] setsockopt(3, SOL_SOCKET, SO_RCVBUF, [1048576], 4) = 0
[pid 11249] bind(3, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=}, 12)
= 0
[pid 11249] getsockname(3, {sa_family=AF_NETLINK, nl_pid=11249,
nl_groups=}, [12]) = 0
[pid 11249] time([1479745823]) = 1479745823
[pid 11249] sendto(3, {{len=671088640, type=0x1a00 /* NLMSG_??? */,
flags=NLM_F_REQUEST|NLM_F_MULTI|0x100, seq=539046744, pid=0},
"\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\10\0\35\0\0\0\1"}, 40, 0, NULL, 0) = 40
[pid 11249] recvmsg(3,
Notice the len in the buffer passed to the kernel is 0x2800 which
looks byteswapped.
Removing the call to fd_trans_unregister in the NR_socket syscall in
do_syscall fixes this for me, but I don't understand why the fd
translation was immediately unregistered after being registered just
before in do_socket - presumably it was added for a reason.
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9331,7 +9331,6 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
#ifdef TARGET_NR_socket
case TARGET_NR_socket:
ret = do_socket(arg1, arg2, arg3);
-fd_trans_unregister(ret);
break;
#endif
#ifdef TARGET_NR_socketpair
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