Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx> writes: > Hi, > > if the /proc/sys/kernel/core_pattern is set with a space between '|' and the > program and later a core file should be written the kernel panics. > This happens because in format_corename() the first part of cn.corename > is set to '\0' and later call_usermodehelper_exec() exits because of an > empty command path but with return 0. But no pipe is created and thus > cprm.file == NULL. > This leads in file_start_write() to the panic because of dereferencing > file_inode(file)->i_mode. It would seem better to just skip the spaces and DTRT? Of course doing the error check properly is a good idea anyways. -Andi
