Ruoyu WangandPaolo Abeni a61b4db34a nfp: Check resource mutex allocation ...

nfp_cpp_resource_find() allocates a CPP mutex handle for the matching
resource-table entry and then reports success.  nfp_resource_try_acquire()
immediately passes that handle to nfp_cpp_mutex_trylock().

However, nfp_cpp_mutex_alloc() returns NULL on failure.  If that happens
for a matching table entry, the resource lookup still returns success and
the following trylock dereferences a NULL mutex pointer while opening the
resource.

nfp_resource_acquire() already treats failure to allocate the table mutex
as -ENOMEM.  Do the same for the resource mutex and fail the lookup before
publishing the rest of the resource handle.

This issue was found by a static analysis checker and confirmed by
manual source review.

Fixes: f01a216157 ("nfp: add support for resources")
Signed-off-by: Ruoyu Wang <ruoyuw560@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260708143408.3168425-1-ruoyuw560@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

2026-07-21 13:06:40 +02:00

..

nfp

nfp: Check resource mutex allocation

2026-07-21 13:06:40 +02:00

Kconfig

ipv6: convert CONFIG_IPV6 to built-in only and clean up Kconfigs

2026-03-29 11:21:22 -07:00

Makefile

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