diff --git a/0001-vsock-Fix-blocking-ops-call-in-prepare_to_wait.patch b/0001-vsock-Fix-blocking-ops-call-in-prepare_to_wait.patch new file mode 100644 index 0000000..6d871b1 --- /dev/null +++ b/0001-vsock-Fix-blocking-ops-call-in-prepare_to_wait.patch @@ -0,0 +1,170 @@ +From b5671c331cc2e78c83fc826a69dff461903c0fd5 Mon Sep 17 00:00:00 2001 +From: Laura Abbott +Date: Mon, 25 Jan 2016 15:10:02 -0800 +Subject: [PATCHv2] vsock: Fix blocking ops call in prepare_to_wait +To: "David S. Miller" +Cc: netdev@vger.kernel.org +Cc: linux-kernel@vger.kernel.org +To: Aditya Asarwade +To: Thomas Hellstrom +To: Jorgen Hansen + +We receoved a bug report from someone using vmware: + +WARNING: CPU: 3 PID: 660 at kernel/sched/core.c:7389 +__might_sleep+0x7d/0x90() +do not call blocking ops when !TASK_RUNNING; state=1 set at +[] prepare_to_wait+0x2d/0x90 +Modules linked in: vmw_vsock_vmci_transport vsock snd_seq_midi +snd_seq_midi_event snd_ens1371 iosf_mbi gameport snd_rawmidi +snd_ac97_codec ac97_bus snd_seq coretemp snd_seq_device snd_pcm +snd_timer snd soundcore ppdev crct10dif_pclmul crc32_pclmul +ghash_clmulni_intel vmw_vmci vmw_balloon i2c_piix4 shpchp parport_pc +parport acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc btrfs +xor raid6_pq 8021q garp stp llc mrp crc32c_intel serio_raw mptspi vmwgfx +drm_kms_helper ttm drm scsi_transport_spi mptscsih e1000 ata_generic +mptbase pata_acpi +CPU: 3 PID: 660 Comm: vmtoolsd Not tainted +4.2.0-0.rc1.git3.1.fc23.x86_64 #1 +Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop +Reference Platform, BIOS 6.00 05/20/2014 + 0000000000000000 0000000049e617f3 ffff88006ac37ac8 ffffffff818641f5 + 0000000000000000 ffff88006ac37b20 ffff88006ac37b08 ffffffff810ab446 + ffff880068009f40 ffffffff81c63bc0 0000000000000061 0000000000000000 +Call Trace: + [] dump_stack+0x4c/0x65 + [] warn_slowpath_common+0x86/0xc0 + [] warn_slowpath_fmt+0x55/0x70 + [] ? debug_lockdep_rcu_enabled+0x1d/0x20 + [] ? prepare_to_wait+0x2d/0x90 + [] ? prepare_to_wait+0x2d/0x90 + [] __might_sleep+0x7d/0x90 + [] __might_fault+0x43/0xa0 + [] copy_from_iter+0x87/0x2a0 + [] __qp_memcpy_to_queue+0x9a/0x1b0 [vmw_vmci] + [] ? qp_memcpy_to_queue+0x20/0x20 [vmw_vmci] + [] qp_memcpy_to_queue_iov+0x17/0x20 [vmw_vmci] + [] qp_enqueue_locked+0xa0/0x140 [vmw_vmci] + [] vmci_qpair_enquev+0x4f/0xd0 [vmw_vmci] + [] vmci_transport_stream_enqueue+0x1b/0x20 +[vmw_vsock_vmci_transport] + [] vsock_stream_sendmsg+0x2c5/0x320 [vsock] + [] ? wake_atomic_t_function+0x70/0x70 + [] sock_sendmsg+0x38/0x50 + [] SYSC_sendto+0x104/0x190 + [] ? vfs_read+0x8a/0x140 + [] SyS_sendto+0xe/0x10 + [] entry_SYSCALL_64_fastpath+0x12/0x76 + +transport->stream_enqueue may call copy_to_user so it should +not be called inside a prepare_to_wait. Narrow the scope of +the prepare_to_wait to avoid the bad call. This also applies +to vsock_stream_recvmsg as well. + +Reported-by: Vinson Lee +Tested-by: Vinson Lee +Signed-off-by: Laura Abbott +--- +v2: fix same issue in recvmsg path as well. +--- + net/vmw_vsock/af_vsock.c | 19 ++++++------------- + 1 file changed, 6 insertions(+), 13 deletions(-) + +diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c +index 7fd1220..bbe65dc 100644 +--- a/net/vmw_vsock/af_vsock.c ++++ b/net/vmw_vsock/af_vsock.c +@@ -1557,8 +1557,6 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg, + if (err < 0) + goto out; + +- prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); +- + while (total_written < len) { + ssize_t written; + +@@ -1578,7 +1576,9 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg, + goto out_wait; + + release_sock(sk); ++ prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); + timeout = schedule_timeout(timeout); ++ finish_wait(sk_sleep(sk), &wait); + lock_sock(sk); + if (signal_pending(current)) { + err = sock_intr_errno(timeout); +@@ -1588,8 +1588,6 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg, + goto out_wait; + } + +- prepare_to_wait(sk_sleep(sk), &wait, +- TASK_INTERRUPTIBLE); + } + + /* These checks occur both as part of and after the loop +@@ -1635,7 +1633,6 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg, + out_wait: + if (total_written > 0) + err = total_written; +- finish_wait(sk_sleep(sk), &wait); + out: + release_sock(sk); + return err; +@@ -1716,7 +1713,6 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, + if (err < 0) + goto out; + +- prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); + + while (1) { + s64 ready = vsock_stream_has_data(vsk); +@@ -1727,7 +1723,7 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, + */ + + err = -ENOMEM; +- goto out_wait; ++ goto out; + } else if (ready > 0) { + ssize_t read; + +@@ -1750,7 +1746,7 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, + vsk, target, read, + !(flags & MSG_PEEK), &recv_data); + if (err < 0) +- goto out_wait; ++ goto out; + + if (read >= target || flags & MSG_PEEK) + break; +@@ -1773,7 +1769,9 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, + break; + + release_sock(sk); ++ prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); + timeout = schedule_timeout(timeout); ++ finish_wait(sk_sleep(sk), &wait); + lock_sock(sk); + + if (signal_pending(current)) { +@@ -1783,9 +1781,6 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, + err = -EAGAIN; + break; + } +- +- prepare_to_wait(sk_sleep(sk), &wait, +- TASK_INTERRUPTIBLE); + } + } + +@@ -1816,8 +1811,6 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, + err = copied; + } + +-out_wait: +- finish_wait(sk_sleep(sk), &wait); + out: + release_sock(sk); + return err; +-- +2.5.0 + diff --git a/kernel.spec b/kernel.spec index 375ddf6..35a81db 100644 --- a/kernel.spec +++ b/kernel.spec @@ -598,6 +598,9 @@ Patch645: cfg80211-wext-fix-message-ordering.patch #rhbz 1255325 Patch646: HID-sony-do-not-bail-out-when-the-sixaxis-refuses-th.patch +#rhbz 1288684 +Patch647: 0001-vsock-Fix-blocking-ops-call-in-prepare_to_wait.patch + # END OF PATCH DEFINITIONS %endif @@ -2069,6 +2072,9 @@ fi # # %changelog +* Fri Feb 12 2016 Laura Abbott +- Fix warning spew from vmware sockets (rhbz 1288684) + * Fri Feb 12 2016 Justin M. Forbes - 4.5.0-0.rc3.git3.1 - Linux v4.5-rc3-83-gc05235d