On 03/07/2013 12:00 AM, richard -rw- weinberger wrote: > Found the issue. A very nasty use-after-free tty issue which happened > only sometimes. > Please test the attached patch. > /me tested x86_64 and x86 successfully. > Today I tested a patched 3.9 kernel for the UML guest several times, host kernel was 3.8.2. Later I realized a core file in my HOME directory. I'm not sure whether this back trace helps :
... warning: Could not load shared library symbols for linux-gate.so.1. Do you need "set solib-search-path" or "set sysroot"? Core was generated by `/usr/local/bin/linux-v3.9-rc1-211-g47b3bc9 earlyprintk ubda=/home/tfoerste/virt'. Program terminated with signal 11, Segmentation fault. #0 constant_test_bit (nr=<optimized out>, addr=<optimized out>) at /home/tfoerste/devel/linux/arch/x86/include/asm/bitops.h:321 321 (addr[nr / BITS_PER_LONG])) != 0; (gdb) bt #0 constant_test_bit (nr=<optimized out>, addr=<optimized out>) at /home/tfoerste/devel/linux/arch/x86/include/asm/bitops.h:321 #1 test_ti_thread_flag (ti=<optimized out>, flag=<optimized out>) at include/linux/thread_info.h:93 #2 test_tsk_thread_flag (flag=<optimized out>, tsk=<optimized out>) at include/linux/sched.h:2522 #3 signal_pending (p=<optimized out>) at include/linux/sched.h:2548 #4 __set_task_blocked (tsk=0x37ec0000, newset=0x37ec2f48) at kernel/signal.c:2524 #5 0x0808d003 in __set_current_blocked (newset=0x37ec2f48) at kernel/signal.c:2552 #6 0x0808d027 in set_current_blocked (newset=0x0) at kernel/signal.c:2544 #7 0x0808e584 in sigsuspend (set=0x0) at kernel/signal.c:3550 #8 0x08064668 in winch_thread (arg=0x0) at arch/um/drivers/chan_user.c:210 #9 0x46a6b41e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:133 (gdb) quit -- MfG/Sincerely Toralf Förster pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3 ------------------------------------------------------------------------------ Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
