Fixes the following security issues:
CVE-2022-23219: Passing an overlong file name to the clnt_create
legacy function could result in a stack-based buffer overflow when
using the "unix" protocol. Reported by Martin Sebor.
CVE-2022-23218: Passing an overlong file name to the svcunix_create
legacy function could result in a stack-based buffer overflow.
CVE-2021-3998: Passing a path longer than PATH_MAX to the realpath
function could result in a memory leak and potential access of
uninitialized memory. Reported by Qualys.
CVE-2021-3999: Passing a buffer of size exactly 1 byte to the getcwd
function may result in an off-by-one buffer underflow and overflow
when the current working directory is longer than PATH_MAX and also
corresponds to the / directory through an unprivileged mount
namespace. Reported by Qualys.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
1983d2e6a3