Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-01 10:42:11 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

irqchip/gic-v3-its: Fix over allocation in itt_alloc_pool()

Browse Source 
itt_alloc_pool() calls its_alloc_pages_node() to allocate an individual
page to add to the pool (for allocations <PAGE_SIZE). However the final
argument of its_alloc_pages_node() is the page order not the number of
pages. Currently it allocates two pages and leaks the second page.
Fix it by passing 0 instead (1 << 0 = 1 page).

Fixes: b08e2f42e8 ("irqchip/gic-v3-its: Share ITS tables with a non-trusted hypervisor")
Reported-by: Shanker Donthineni <sdonthineni@nvidia.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/1f6e19c4-1fb9-43ab-a8a2-a465c9cff84b@arm.com
Closes: https://lore.kernel.org/r/ed65312a-245c-4fa5-91ad-5d620cab7c6b%40nvidia.com
This commit is contained in:
Steven Price 2024-10-21 11:41:05 +01:00 committed by Thomas Gleixner
parent 010863f40f
commit bc88d44bd7
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/irqchip/irq-gic-v3-its.c
View File

@ -261,7 +261,7 @@ static void *itt_alloc_pool(int node, int size)
if (addr)
break;
page = its_alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 1);
page = its_alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
if (!page)
break;