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Filename Latest commit message Latest commit date
Eric W. Biederman 625c3ed247 signal/mips: Update (_save|_restore)_fp_context to fail with -EFAULT 
commit 95bf9d646c3c3f95cb0be7e703b371db8da5be68 upstream.

When an instruction to save or restore a register from the stack fails
in _save_fp_context or _restore_fp_context return with -EFAULT.  This
change was made to r2300_fpu.S[1] but it looks like it got lost with
the introduction of EX2[2].  This is also what the other implementation
of _save_fp_context and _restore_fp_context in r4k_fpu.S does, and
what is needed for the callers to be able to handle the error.

Furthermore calling do_exit(SIGSEGV) from bad_stack is wrong because
it does not terminate the entire process it just terminates a single
thread.

As the changed code was the only caller of arch/mips/kernel/syscall.c:bad_stack
remove the problematic and now unused helper function.

Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Maciej Rozycki <macro@orcam.me.uk>
Cc: linux-mips@vger.kernel.org
[1] 35938a00ba ("MIPS: Fix ISA I FP sigcontext access violation handling")
[2] f92722dc45 ("MIPS: Correct MIPS I FP sigcontext layout")
Cc: stable@vger.kernel.org
Fixes: f92722dc45 ("MIPS: Correct MIPS I FP sigcontext layout")
Acked-by: Maciej W. Rozycki <macro@orcam.me.uk>
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Link: https://lkml.kernel.org/r/20211020174406.17889-5-ebiederm@xmission.com
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-11-17 09:48:24 +01:00
arch signal/mips: Update (_save|_restore)_fp_context to fail with -EFAULT 2021-11-17 09:48:24 +01:00
block Revert "block, bfq: honor already-setup queue merges" 2021-10-06 15:42:34 +02:00
certs
crypto
Documentation regulator: dt-bindings: samsung,s5m8767: correct s5m8767,pmic-buck-default-dvs-idx property 2021-11-17 09:48:22 +01:00
drivers RDMA/qedr: Fix NULL deref for query_qp on the GSI QP 2021-11-17 09:48:24 +01:00
fs btrfs: call btrfs_check_rw_degradable only if there is a missing device 2021-11-17 09:48:22 +01:00
include net: multicast: calculate csum of looped-back and forwarded packets 2021-11-17 09:48:21 +01:00
init
ipc
kernel signal: Remove the bogus sigkill_pending in ptrace_stop 2021-11-17 09:48:24 +01:00
lib
LICENSES
mm mm, slub: fix potential memoryleak in kmem_cache_open() 2021-10-27 09:54:28 +02:00
net net/smc: Correct spelling mistake to TCPF_SYN_RECV 2021-11-17 09:48:22 +01:00
samples
scripts gcc-plugins/structleak: add makefile var for disabling structleak 2021-10-27 09:54:28 +02:00
security evm: mark evm_fixmode as __ro_after_init 2021-11-17 09:48:23 +01:00
sound ALSA: timer: Unconditionally unlink slave instances, too 2021-11-17 09:48:19 +01:00
tools perf script: Check session->header.env.arch before using it 2021-11-02 19:46:15 +01:00
usr
virt KVM: do not shrink halt_poll_ns below grow_start 2021-10-09 14:39:50 +02:00
.clang-format
.cocciconfig
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Makefile Linux 5.4.159 2021-11-12 14:43:05 +01:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.