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| author | Victor Kamensky <kamensky@cisco.com> | 2017-04-04 05:51:01 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-12 10:41:11 (GMT) |
| commit | 3715dbf77f3bcbd82f447b50e3310f5139028cde (patch) | |
| tree | 4af41fbf8985cd10cfb54766c81bf8eeeeb041b2 /net/wireless/sysfs.c | |
| parent | 71b44ef83d2a74e1be9053f80455f62086fae822 (diff) | |
| download | linux-3715dbf77f3bcbd82f447b50e3310f5139028cde.tar.xz | |
arm64: mm: unaligned access by user-land should be received as SIGBUS
commit 09a6adf53d42ca3088fa3fb41f40b768efc711ed upstream.
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.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/wireless/sysfs.c')
0 files changed, 0 insertions, 0 deletions