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[ Upstream commit 6817c944430d00f71ccaa9c99ff5b0096aeb7873 ] The cause of the problem is as follows: 1. when cat /sys/devices/system/memory/memory0/valid_zones, test_pages_in_a_zone() will be called. 2. test_pages_in_a_zone() finds the zone according to stat_pfn = 0. The smallest pfn of the numa node in the mips architecture is 128, and the page corresponding to the previous 0~127 pfn is not initialized (page->flags is 0xFFFFFFFF) 3. The nid and zonenum obtained using page_zone(pfn_to_page(0)) are out of bounds in the corresponding array, &NODE_DATA(page_to_nid(page))->node_zones[page_zonenum(page)], access to the out-of-bounds zone member variables appear abnormal, resulting in Oops. Therefore, it is necessary to keep the page between 0 and the minimum pfn to prevent Oops from appearing. Signed-off-by: zhanglianjie <zhanglianjie@uniontech.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Sasha Levin <sashal@kernel.org> |
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| .. | ||
| cop2-ex.c | ||
| cpucfg-emul.c | ||
| dma.c | ||
| env.c | ||
| hpet.c | ||
| init.c | ||
| Kconfig | ||
| Makefile | ||
| numa.c | ||
| Platform | ||
| platform.c | ||
| pm.c | ||
| reset.c | ||
| setup.c | ||
| smp.c | ||
| smp.h | ||
| time.c | ||
| vbios_quirk.c | ||