Gerald Schaefer 8c42dd78df s390/extmem: return correct segment type in __segment_load() ... Commit f05f62d042 ("s390/vmem: get rid of memory segment list") reshuffled the call to vmem_add_mapping() in __segment_load(), which now overwrites rc after it was set to contain the segment type code. As result, __segment_load() will now always return 0 on success, which corresponds to the segment type code SEG_TYPE_SW, i.e. a writeable segment. This results in a kernel crash when loading a read-only segment as dcssblk block device, and trying to write to it. Instead of reshuffling code again, make sure to return the segment type on success, and also describe this rather delicate and unexpected logic in the function comment. Also initialize new segtype variable with invalid value, to prevent possible future confusion. Fixes: f05f62d042 ("s390/vmem: get rid of memory segment list") Cc: <stable@vger.kernel.org> # 5.9+ Signed-off-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>		2023-03-01 20:01:34 +01:00
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cmm.c	s390/cmm: add missing virt_to_phys() conversion	2021-12-10 16:14:25 +01:00
dump_pagetables.c	s390/mm,ptdump: avoid Kasan vs Memcpy Real markers swapping	2023-01-31 18:56:36 +01:00
extable.c	s390/extable: add EX_TABLE_UA_LOAD_REGPAIR() macro	2022-11-21 13:36:15 +01:00
extmem.c	s390/extmem: return correct segment type in __segment_load()	2023-03-01 20:01:34 +01:00
fault.c	s390/kfence: fix page fault reporting	2023-02-15 11:07:01 +01:00
gmap.c	ARM64:	2022-12-15 11:12:21 -08:00
hugetlbpage.c	s390/hugetlb: switch to generic version of follow_huge_pud()	2022-09-11 20:26:01 -07:00
init.c	s390/mm: start kernel with DAT enabled	2023-01-13 14:15:05 +01:00
kasan_init.c	s390/mem_detect: do not truncate online memory ranges info	2023-02-14 11:45:40 +01:00
maccess.c	s390/mm: allocate Absolute Lowcore Area in decompressor	2023-01-13 14:15:06 +01:00
Makefile	s390/extable: move extable related functions to mm/extable.c	2022-03-08 00:33:00 +01:00
mmap.c	treewide: use get_random_u32() when possible	2022-10-11 17:42:58 -06:00
page-states.c	s390/mm: remove unused get_page_state() function	2022-11-23 16:24:07 +01:00
pageattr.c	s390/mm,pageattr: don't use pte_val()/pXd_val() as lvalue	2022-03-01 21:05:10 +01:00
pgalloc.c	s390/mm: use CRST_ALLOC_ORDER instead of number	2022-02-09 22:56:04 +01:00
pgtable.c	s390/mm: add support for RDP (Reset DAT-Protection)	2023-02-14 11:45:39 +01:00
vmem.c	s390/vmem: remove unnecessary KASAN checks	2023-02-06 11:13:53 +01:00