Re: [PATCH v6 14/16] pidfd: Use new infrastructure to fix deadlocks in execve
From: Christian Brauner <hidden>
Date: 2020-03-25 15:41:19
Also in:
linux-api, linux-fsdevel, linux-mm, lkml, stable
On Sat, Mar 21, 2020 at 02:46:16AM +0000, Bernd Edlinger wrote:
This changes __pidfd_fget to use the new exec_update_mutex instead of cred_guard_mutex. This should be safe, as the credentials do not change before exec_update_mutex is locked. Therefore whatever file access is possible with holding the cred_guard_mutex here is also possbile with the exec_update_mutex. Signed-off-by: Bernd Edlinger <redacted>
Reviewed-by: Christian Brauner <redacted>