This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- trusty' to 'verification-done-trusty'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-trusty -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1393355 Title: Issue with msgrcv in a 32-bit application and -ve argument Status in linux package in Ubuntu: Fix Released Status in linux source package in Trusty: Fix Committed Status in linux source package in Utopic: Fix Released Status in linux source package in Vivid: Fix Released Bug description: == Comment: #0 - R. Wilson <wilso...@uk.ibm.com> - 2014-11-13 08:11:01 == ---Problem Description--- system call msgrcv() from 32-bit application shows error: msgrcv: No message of desired type The following upstream commit resolves the issue. commit e7ca2552369c1dfe0216c626baf82c3d83ec36bb Author: Mateusz Guzik <mgu...@redhat.com> Date: Mon Jan 27 17:07:11 2014 -0800 ipc: fix compat msgrcv with negative msgtyp Compat function takes msgtyp argument as u32 and passes it down to do_msgrcv which results in casting to long, thus the sign is lost and we get a big positive number instead. Cast the argument to signed type before passing it down. We now hit the problem on Ubuntu 14_04 and need to know if a similar patch is forthcoming. ---uname output--- Linux ctg-a-il-u1 3.13.0-39-generic #66-Ubuntu SMP Tue Oct 28 13:30:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux Machine Type = VMware guest ---Debugger--- A debugger is not configured ---Steps to Reproduce--- Compile test applications using gcc -m32 -o <name> <name.c> Run test application testmsgs to send a message to a queue Run test application testmsgr that *should* retriieve message sent by testmsgs Observe that testmsgr does not retrieve message Repeat test, compilling with -m64 instead - applications work as expected Stack trace output: no Oops output: no Userspace tool common name: custom application designed to replicate problem The userspace tool has the following bit modes: 32-bit System Dump Info: The system is not configured to capture a system dump. == Comment: #2 - R. Wilson <wilso...@uk.ibm.com> - 2014-11-13 08:15:25 == Back trace for testmsgr: (gdb) bt #0 0xf777c430 in __kernel_vsyscall () #1 0xf76a4660 in msgrcv () from /lib32/libc.so.6 #2 0x08048573 in main () (gdb) The msgrcv *should* have returned immediately as the message was placed on the queue by testmsgs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1393355/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
