Hi Glynn,
Thanks a lot for the reply. I will try that too.
I forgot to mention 1 thing, that I had put printk() in the
do_generic_file_read function to see if it is getting executed, and I saw the
printed message for executables too. Thats why I assumed that these functions
do get executed while accessing executable files. Is it someting like other
mmap functions get executed before calling regular read?
Thanks and regards,
Vineet
--- On Mon 02/07, Glynn Clements < [EMAIL PROTECTED] > wrote:
From: Glynn Clements [mailto: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED], [email protected]
Date: Mon, 7 Feb 2005 18:31:24 +0000
Subject: Re: Problem in accessing executable files
<br>Vineet Joglekar wrote:<br><br>> Thanks for suggesting the single / few
bytes encryption test. I tried<br>> doing that, but in vain. Maybe I am going
wrong somewhere else.<br><br>I'm pretty sure that mmap'ed access doesn't go
through<br>do_generic_file_read().<br><br>Executable files (programs and shared
libraries) are normally mmap'ed<br>rather than read, which would explain why
you have problems with<br>executable files.<br><br>Try writing a test program
which reads the contents of a file using<br>mmap() rather than read(). If my
assumption is correct, the decryption<br>code will be bypassed, so you will get
the encrypted data.<br><br>-- <br>Glynn Clements <[EMAIL PROTECTED]><br>
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