James Morse 6ccbb613b4 arm_mpam: Check whether the config array is allocated before destroying it ... __destroy_component_cfg() is called to free the configuration array. It uses the embedded 'garbage' structure, which means the array has to be allocated. If __destroy_component_cfg() is called from mpam_disable() before the configuration was ever allocated, then a NULL pointer is dereferenced. Check for this case and return early if the configuration is not allocated. __destroy_component_cfg() also frees the mbwu_state as this is allocated by __allocate_component_cfg(). As the mbwu_state is allocated after comp->cfg is set, and is also under mpam_list_lock, only the first pointer needs checking. Fixes: 3bd04fe7d8 ("arm_mpam: Extend reset logic to allow devices to be reset any time") Cc: <stable@vger.kernel.org> Signed-off-by: James Morse <james.morse@arm.com> Reviewed-by: Ben Horgan <ben.horgan@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2026-05-14 09:52:05 +01:00
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Kconfig	arm64: mpam: Select ARCH_HAS_CPU_RESCTRL	2026-03-27 15:32:11 +00:00
Makefile	arm64: mpam: Select ARCH_HAS_CPU_RESCTRL	2026-03-27 15:32:11 +00:00
mpam_devices.c	arm_mpam: Check whether the config array is allocated before destroying it	2026-05-14 09:52:05 +01:00
mpam_internal.h	arm_mpam: Pretend that NRDY is always hardware managed	2026-05-14 09:51:50 +01:00
mpam_resctrl.c	arm_mpam: resctrl: Make resctrl_mon_ctx_waiters static	2026-04-17 17:48:07 +01:00
test_mpam_devices.c	arm_mpam: Force __iomem casts	2026-03-13 14:17:30 +00:00
test_mpam_resctrl.c	arm_mpam: resctrl: Add kunit test for control format conversions	2026-03-27 15:31:04 +00:00