Revision eb35bdd7bca29a13c8ecd44e6fd747a84ce675db authored by Will Deacon on 11 September 2014, 13:38:16 UTC, committed by Will Deacon on 11 September 2014, 17:34:58 UTC
Nathan reports that we leak TLS information from the parent context
during an exec, as we don't clear the TLS registers when flushing the
thread state.
This patch updates the flushing code so that we:
(1) Unconditionally zero the tpidr_el0 register (since this is fully
context switched for native tasks and zeroed for compat tasks)
(2) Zero the tp_value state in thread_info before clearing the
tpidrr0_el0 register for compat tasks (since this is only writable
by the set_tls compat syscall and therefore not fully switched).
A missing compiler barrier is also added to the compat set_tls syscall.
Cc: <stable@vger.kernel.org>
Acked-by: Nathan Lynch <Nathan_Lynch@mentor.com>
Reported-by: Nathan Lynch <Nathan_Lynch@mentor.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
1 parent 3d8afe3
| File | Mode | Size |
|---|---|---|
| basic | ||
| coccinelle | ||
| dtc | ||
| genksyms | ||
| kconfig | ||
| ksymoops | ||
| mod | ||
| package | ||
| rt-tester | ||
| selinux | ||
| tracing | ||
| .gitignore | -rw-r--r-- | 116 bytes |
| Kbuild.include | -rw-r--r-- | 10.5 KB |
| Lindent | -rwxr-xr-x | 460 bytes |
| Makefile | -rw-r--r-- | 1.4 KB |
| Makefile.asm-generic | -rw-r--r-- | 683 bytes |
| Makefile.build | -rw-r--r-- | 13.5 KB |
| Makefile.clean | -rw-r--r-- | 3.2 KB |
| Makefile.extrawarn | -rw-r--r-- | 2.4 KB |
| Makefile.fwinst | -rw-r--r-- | 2.0 KB |
| Makefile.headersinst | -rw-r--r-- | 4.7 KB |
| Makefile.help | -rw-r--r-- | 68 bytes |
| Makefile.host | -rw-r--r-- | 4.5 KB |
| Makefile.lib | -rw-r--r-- | 13.8 KB |
| Makefile.modbuiltin | -rw-r--r-- | 1.8 KB |
| Makefile.modinst | -rw-r--r-- | 1.2 KB |
| Makefile.modpost | -rw-r--r-- | 5.2 KB |
| Makefile.modsign | -rw-r--r-- | 1003 bytes |
| analyze_suspend.py | -rwxr-xr-x | 117.6 KB |
| asn1_compiler.c | -rw-r--r-- | 33.8 KB |
| bloat-o-meter | -rwxr-xr-x | 1.8 KB |
| bootgraph.pl | -rw-r--r-- | 6.3 KB |
| checkincludes.pl | -rwxr-xr-x | 1.8 KB |
| checkkconfigsymbols.sh | -rwxr-xr-x | 1.8 KB |
| checkpatch.pl | -rwxr-xr-x | 145.4 KB |
| checkstack.pl | -rwxr-xr-x | 5.3 KB |
| checksyscalls.sh | -rwxr-xr-x | 5.6 KB |
| checkversion.pl | -rwxr-xr-x | 1.9 KB |
| cleanfile | -rwxr-xr-x | 3.4 KB |
| cleanpatch | -rwxr-xr-x | 5.0 KB |
| coccicheck | -rwxr-xr-x | 4.6 KB |
| config | -rwxr-xr-x | 4.5 KB |
| conmakehash.c | -rw-r--r-- | 6.0 KB |
| decode_stacktrace.sh | -rwxr-xr-x | 3.0 KB |
| decodecode | -rwxr-xr-x | 2.1 KB |
| depmod.sh | -rwxr-xr-x | 1.7 KB |
| diffconfig | -rwxr-xr-x | 3.7 KB |
| docproc.c | -rw-r--r-- | 13.8 KB |
| export_report.pl | -rw-r--r-- | 4.5 KB |
| extract-ikconfig | -rwxr-xr-x | 1.6 KB |
| extract-vmlinux | -rwxr-xr-x | 1.6 KB |
| gcc-goto.sh | -rw-r--r-- | 495 bytes |
| gcc-ld | -rw-r--r-- | 676 bytes |
| gcc-version.sh | -rw-r--r-- | 822 bytes |
| gcc-x86_32-has-stack-protector.sh | -rw-r--r-- | 184 bytes |
| gcc-x86_64-has-stack-protector.sh | -rw-r--r-- | 200 bytes |
| gen_initramfs_list.sh | -rw-r--r-- | 7.9 KB |
| get_maintainer.pl | -rwxr-xr-x | 57.3 KB |
| gfp-translate | -rwxr-xr-x | 1.7 KB |
| headerdep.pl | -rwxr-xr-x | 3.5 KB |
| headers.sh | -rwxr-xr-x | 528 bytes |
| headers_check.pl | -rw-r--r-- | 3.6 KB |
| headers_install.sh | -rw-r--r-- | 1.3 KB |
| kallsyms.c | -rw-r--r-- | 16.5 KB |
| kernel-doc | -rwxr-xr-x | 72.0 KB |
| ld-version.sh | -rwxr-xr-x | 205 bytes |
| link-vmlinux.sh | -rw-r--r-- | 5.7 KB |
| makelst | -rwxr-xr-x | 773 bytes |
| markup_oops.pl | -rw-r--r-- | 8.1 KB |
| mkcompile_h | -rwxr-xr-x | 2.5 KB |
| mkmakefile | -rw-r--r-- | 1.2 KB |
| mksysmap | -rw-r--r-- | 1.3 KB |
| mkuboot.sh | -rwxr-xr-x | 379 bytes |
| mkversion | -rw-r--r-- | 74 bytes |
| module-common.lds | -rw-r--r-- | 737 bytes |
| namespace.pl | -rwxr-xr-x | 13.0 KB |
| objdiff | -rwxr-xr-x | 2.7 KB |
| patch-kernel | -rwxr-xr-x | 9.9 KB |
| pnmtologo.c | -rw-r--r-- | 11.9 KB |
| profile2linkerlist.pl | -rw-r--r-- | 375 bytes |
| recordmcount.c | -rw-r--r-- | 12.5 KB |
| recordmcount.h | -rw-r--r-- | 16.4 KB |
| recordmcount.pl | -rwxr-xr-x | 17.9 KB |
| setlocalversion | -rwxr-xr-x | 3.9 KB |
| show_delta | -rwxr-xr-x | 3.0 KB |
| sign-file | -rwxr-xr-x | 12.2 KB |
| sortextable.c | -rw-r--r-- | 7.6 KB |
| sortextable.h | -rw-r--r-- | 5.5 KB |
| tags.sh | -rwxr-xr-x | 10.3 KB |
| unifdef.c | -rw-r--r-- | 34.8 KB |
| ver_linux | -rwxr-xr-x | 3.1 KB |
| xz_wrap.sh | -rw-r--r-- | 562 bytes |
Computing file changes ...
