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mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-17 16:14:25 +08:00
linux/arch/x86
Thomas Gleixner d181d2da01 x86/dumpstack: Dump user space code correctly again
H.J. reported that post 5.7 a segfault of a user space task does not longer
dump the Code bytes when /proc/sys/debug/exception-trace is enabled. It
prints 'Code: Bad RIP value.' instead.

This was broken by a recent change which made probe_kernel_read() reject
non-kernel addresses.

Update show_opcodes() so it retrieves user space opcodes via
copy_from_user_nmi().

Fixes: 98a23609b1 ("maccess: always use strict semantics for probe_kernel_read")
Reported-by: H.J. Lu <hjl.tools@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/87h7tz306w.fsf@nanos.tec.linutronix.de
2020-07-22 23:47:48 +02:00
..
boot A pile of fixes for x86: 2020-07-19 12:16:09 -07:00
configs compiler: remove CONFIG_OPTIMIZE_INLINING entirely 2020-04-07 10:43:42 -07:00
crypto There are a lot of objtool changes in this cycle, all across the map: 2020-06-01 13:13:00 -07:00
entry x86/entry: Actually disable stack protector 2020-07-19 13:07:10 +02:00
events A single Kbuild dependency fix. 2020-06-28 11:58:14 -07:00
hyperv vmalloc: fix the owner argument for the new __vmalloc_node_range callers 2020-07-03 16:15:25 -07:00
ia32 Merge branch 'exec-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2020-06-04 14:07:08 -07:00
include A pile of fixes for x86: 2020-07-19 12:16:09 -07:00
kernel x86/dumpstack: Dump user space code correctly again 2020-07-22 23:47:48 +02:00
kvm KVM: nVMX: fixes for preemption timer migration 2020-07-10 06:15:36 -04:00
lib * AMD Memory bandwidth counter width fix, by Babu Moger. 2020-06-28 10:35:01 -07:00
math-emu x86: math-emu: Fix up 'cmp' insn for clang ias 2020-07-16 17:26:42 +02:00
mm maccess: rename probe_kernel_address to get_kernel_nofault 2020-06-18 11:14:40 -07:00
net bpf, i386: Remove unneeded conversion to bool 2020-05-07 16:29:14 +02:00
oprofile
pci maccess: rename probe_kernel_address to get_kernel_nofault 2020-06-18 11:14:40 -07:00
platform irqdomain/treewide: Keep firmware node unconditionally allocated 2020-07-14 17:44:42 +02:00
power x86/cpu: Reinitialize IA32_FEAT_CTL MSR on BSP during wakeup 2020-06-15 14:18:37 +02:00
purgatory x86/purgatory: Add -fno-stack-protector 2020-06-16 17:05:07 -07:00
ras treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
realmode Rebase locking/kcsan to locking/urgent 2020-06-11 20:02:46 +02:00
tools .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
um mmap locking API: use coccinelle to convert mmap_sem rwsem call sites 2020-06-09 09:39:14 -07:00
video
xen x86/ioperm: Fix io bitmap invalidation on Xen PV 2020-07-18 12:31:49 +02:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Kbuild
Kconfig objtool: Fix noinstr vs KCOV 2020-06-18 17:36:33 +02:00
Kconfig.assembler x86/delay: Introduce TPAUSE delay 2020-05-07 16:06:20 +02:00
Kconfig.cpu treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Kconfig.debug treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile x86/boot/build: Make 'make bzlilo' not depend on vmlinux or $(obj)/bzImage 2020-04-21 18:10:28 +02:00
Makefile_32.cpu
Makefile.um