In a process context kernel_read returns -EINTR, how to proceed?

Lev Olshvang levonshe at
Fri Dec 21 08:51:29 EST 2018

Hi Valdis,

I need to read file  inside LSM hook and I can not do it in user space
I forgot o mention that same error occurried  both in 4.4 and 4.13 kernels
 What alternative you can recommend to read file in kernel and avoid -EINTR?
Is vfs_read() different from kernel_read() ?


20.12.2018, 23:09, "valdis.kletnieks at" <valdis.kletnieks at>:
> On Thu, 20 Dec 2018 13:33:09 +0300, Lev Olshvang said:
>>  I use kernel_read to read file in chunks of 4K size in a process context
>>  On several files, like libc, libm, I got -EINTR error.
> What are you trying to accomplish? This is not a recommended way to do things.
>>  I do not understand who may interrupt such a small read, I suppose these
>>  libraries are already mapped in other processes so no real I/O should be done.
> That should be a hint....
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