Victor Kamensky 09a6adf53d arm64: mm: unaligned access by user-land should be received as SIGBUS ...

After 52d7523 (arm64: mm: allow the kernel to handle alignment faults on
user accesses) commit user-land accesses that produce unaligned exceptions
like in case of aarch32 ldm/stm/ldrd/strd instructions operating on
unaligned memory received by user-land as SIGSEGV. It is wrong, it should
be reported as SIGBUS as it was before 52d7523 commit.

Changed do_bad_area function to take signal and code parameters out of esr
value using fault_info table, so in case of do_alignment_fault fault
user-land will receive SIGBUS. Wrapped access to fault_info table into
esr_to_fault_info function.

Cc: <stable@vger.kernel.org>
Fixes: 52d7523 (arm64: mm: allow the kernel to handle alignment faults on user accesses)
Signed-off-by: Victor Kamensky <kamensky@cisco.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

2017-04-04 12:13:36 +01:00

..

cache.S

arm64: don't pull uaccess.h into *.S

2016-12-26 13:05:17 -05:00

context.c

arm64: Work around Falkor erratum 1003

2017-02-10 11:22:12 +00:00

copypage.c

arm64: Defer dcache flush in __cpu_copy_user_page

2015-12-17 11:07:13 +00:00

dma-mapping.c

This is a tree wide change and has been kept separate for that reason.

2017-02-25 13:45:43 -08:00

dump.c

arm64: dump: Add checking for writable and exectuable pages

2016-11-07 18:15:04 +00:00

extable.c

arm64: migrate exception table users off module.h and onto extable.h

2016-09-20 09:36:21 +01:00

fault.c

arm64: mm: unaligned access by user-land should be received as SIGBUS

2017-04-04 12:13:36 +01:00

flush.c

arm64: Remove I-cache invalidation from flush_cache_range()

2016-11-23 18:05:52 +00:00

hugetlbpage.c

arm64: hugetlb: fix the wrong return value for huge_ptep_set_access_flags

2017-01-11 10:26:40 +00:00

init.c

arm64 updates for 4.11:

2017-02-22 10:46:44 -08:00

ioremap.c

arm64: use is_vmalloc_addr

2017-02-09 13:47:56 +00:00

kasan_init.c

arm64: kasan: avoid bad virt_to_pfn()

2017-03-10 17:41:41 +00:00

Makefile

arm64: Add support for CONFIG_DEBUG_VIRTUAL

2017-01-12 15:05:39 +00:00

mmap.c

sched/headers: Prepare for new header dependencies before moving more code to <linux/sched/mm.h>

2017-03-02 08:42:30 +01:00

mmu.c

Revert "arm64: mm: set the contiguous bit for kernel mappings where appropriate"

2017-02-24 10:55:42 +00:00

numa.c

ACPI/NUMA: Do not map pxm to node when NUMA is turned off

2016-12-15 11:32:32 +01:00

pageattr.c

arm64: hibernate: Support DEBUG_PAGEALLOC

2016-08-25 18:00:30 +01:00

pgd.c

arm64: mm: drop fixup_init() and mm.h

2016-09-06 19:09:38 +01:00

physaddr.c

arm64: Add support for CONFIG_DEBUG_VIRTUAL

2017-01-12 15:05:39 +00:00

proc.S

arm64: Avoid clobbering mm in erratum workaround on QDF2400

2017-02-24 10:55:31 +00:00

ptdump_debugfs.c

arm64: dump: Make ptdump debugfs a separate option

2016-11-07 18:15:04 +00:00