Re: /bin/ls: cannot read symbolic link /proc/$$/exe: Permission denied

[Olaf Hering <olh@suse.de>]

 On Mon, Aug 16, Olaf Hering wrote:

> 
> For some reasons ls -l /proc/$$/exe doesnt work all time for me,
> with 2.6.8.1 on ppc64. Sometimes it does, sometimes not. No pattern.
> A few printks show that this check in proc_pid_readlink() triggers
> an -EACCES:
> 
>         current->fsuid != inode->i_uid
> 
> proc_pid_readlink(755) error -13 ntptrace(11408) fsuid 100 i_uid 0 0
> sys_readlink(281) ntptrace(11408) error -13 readlink

bprm.interp_flags contains garbage like 0xc0000001,
that triggers task->mm->dumpable =0;

please apply.

Signed-off-by: Olaf Hering <olh@suse.de>

diff -p -purN linux-2.6.8.1.omfg/fs/compat.c linux-2.6.8.1/fs/compat.c
--- linux-2.6.8.1.omfg/fs/compat.c	2004-08-14 12:55:31.000000000 +0200
+++ linux-2.6.8.1/fs/compat.c	2004-08-17 00:14:56.000000000 +0200
@@ -1390,6 +1390,7 @@ int compat_do_execve(char * filename,
 	bprm.sh_bang = 0;
 	bprm.loader = 0;
 	bprm.exec = 0;
+	bprm.interp_flags = 0;
 	bprm.security = NULL;
 	bprm.mm = mm_alloc();
 	retval = -ENOMEM;

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