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eb740b5f3e
linux/arch/s390/kernel
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Linus Torvalds faf309009e sys_poll: fix incorrect type for 'timeout' parameter 
The 'poll()' system call timeout parameter is supposed to be 'int', not
'long'.

Now, the reason this matters is that right now 32-bit compat mode is
broken on at least x86-64, because the 32-bit code just calls
'sys_poll()' directly on x86-64, and the 32-bit argument will have been
zero-extended, turning a signed 'int' into a large unsigned 'long'
value.

We could just introduce a 'compat_sys_poll()' function for this, and
that may eventually be what we have to do, but since the actual standard
poll() semantics is *supposed* to be 'int', and since at least on x86-64
glibc sign-extends the argument before invocing the system call (so
nobody can actually use a 64-bit timeout value in user space _anyway_,
even in 64-bit binaries), the simpler solution would seem to be to just
fix the definition of the system call to match what it should have been
from the very start.

If it turns out that somebody somehow circumvents the user-level libc
64-bit sign extension and actually uses a large unsigned 64-bit timeout
despite that not being how poll() is supposed to work, we will need to
do the compat_sys_poll() approach.

Reported-by: Thomas Meyer <thomas@m3y3r.de>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-02-21 17:24:20 -08:00
..
vdso32 [S390] vdso: disable gcov profiling 2011-05-23 10:24:29 +02:00
vdso64 [S390] vdso: disable gcov profiling 2011-05-23 10:24:29 +02:00
asm-offsets.c [S390] cleanup trap handling 2011-12-27 11:27:12 +01:00
audit.c [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
audit.h [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
base.S [S390] entry[64].S improvements 2011-12-27 11:27:12 +01:00
bitmap.c [S390] move EXPORT_SYMBOLs to definitions 2009-03-26 15:24:11 +01:00
compat_audit.c [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
compat_exec_domain.c [S390] Get rid of a lot of sparse warnings. 2007-02-05 21:16:47 +01:00
compat_linux.c [S390] ipc: call generic sys_ipc demultiplexer 2011-12-27 11:27:13 +01:00
compat_linux.h Mark arguments to certain syscalls as being const 2010-08-13 16:53:13 -07:00
compat_ptrace.h [S390] ptrace cleanup 2011-01-05 12:47:31 +01:00
compat_signal.c [S390] return address of compat signals 2011-12-27 11:27:14 +01:00
compat_wrapper.S sys_poll: fix incorrect type for 'timeout' parameter 2012-02-21 17:24:20 -08:00
cpcmd.c [S390] convert cpcmd printks to pr_xxx macros. 2008-12-25 13:39:19 +01:00
crash_dump.c [S390] Remove error checking from copy_oldmem_page() 2011-10-30 15:16:47 +01:00
crash.c [S390] Get rid of a lot of sparse warnings. 2007-02-05 21:16:47 +01:00
debug.c switch debugfs to umode_t 2012-01-03 22:54:56 -05:00
diag.c [S390] replace diag10() with diag10_range() function 2011-05-10 17:13:43 +02:00
dis.c [S390] disassembler: mark exception causing instructions 2011-12-27 11:27:14 +01:00
early.c [S390] Check for NULL termination in command line setup 2011-12-27 11:25:48 +01:00
ebcdic.c [S390] Get rid of a lot of sparse warnings. 2007-02-05 21:16:47 +01:00
entry64.S [S390] cleanup trap handling 2011-12-27 11:27:12 +01:00
entry.h [S390] cleanup trap handling 2011-12-27 11:27:12 +01:00
entry.S [S390] cleanup trap handling 2011-12-27 11:27:12 +01:00
ftrace.c [S390] cleanup ftrace backend functions 2011-01-05 12:47:31 +01:00
head31.S [S390] smp: external call vs. emergency signal 2011-10-30 15:16:44 +01:00
head64.S [S390] smp: external call vs. emergency signal 2011-10-30 15:16:44 +01:00
head_kdump.S [S390] kdump backend code 2011-10-30 15:16:42 +01:00
head.S [S390] entry[64].S improvements 2011-12-27 11:27:12 +01:00
init_task.c Use new __init_task_data macro in arch init_task.c files. 2009-09-21 06:27:08 +02:00
ipl.c [S390] sparse: fix sparse warnings about missing prototypes 2011-10-30 15:16:46 +01:00
irq.c [S390] irqstats: split IPI interrupt accounting 2011-10-30 15:16:47 +01:00
jump_label.c s390/jump-label: add arch_jump_label_transform_static() 2011-10-25 11:54:37 -07:00
kprobes.c [S390] sparse: fix sparse static warnings 2011-10-30 15:16:46 +01:00
machine_kexec.c [S390] Add VMCOREINFO_SYMBOL(high_memory) to vmcoreinfo 2011-12-27 11:27:13 +01:00
Makefile [S390] topology: get rid of ifdefs 2011-12-27 11:27:10 +01:00
mcount64.S [S390] fix s390 assembler code alignments 2011-07-24 10:48:21 +02:00
mcount.S [S390] fix s390 assembler code alignments 2011-07-24 10:48:21 +02:00
mem_detect.c [S390] Rework create_mem_hole() function 2011-12-27 11:27:09 +01:00
module.c modules: make arch's use default loader hooks 2011-07-24 22:06:04 +09:30
nmi.c treewide: remove useless NORET_TYPE macro and uses 2012-01-12 20:13:03 -08:00
process.c [S390] idle: avoid RCU usage in extended quiescent state 2012-02-17 10:29:32 +01:00
processor.c [S390] avoid warning in show_cpuinfo 2011-10-30 15:16:15 +01:00
ptrace.c audit: inline audit_syscall_entry to reduce burden on archs 2012-01-17 16:16:56 -05:00
reipl64.S [S390] entry[64].S improvements 2011-12-27 11:27:12 +01:00
reipl.S [S390] kdump backend code 2011-10-30 15:16:42 +01:00
relocate_kernel64.S [S390] fix s390 assembler code alignments 2011-07-24 10:48:21 +02:00
relocate_kernel.S [S390] fix s390 assembler code alignments 2011-07-24 10:48:21 +02:00
s390_ksyms.c [S390] move sie code to entry.S 2011-07-24 10:48:21 +02:00
sclp.S [S390] fix s390 assembler code alignments 2011-07-24 10:48:21 +02:00
setup.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2012-01-09 08:11:13 -08:00
signal.c [S390] cleanup trap handling 2011-12-27 11:27:12 +01:00
smp.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2012-01-09 08:11:13 -08:00
stacktrace.c [S390] Fix stacktrace compile bug. 2008-07-17 17:22:09 +02:00
suspend.c [S390] sparse: fix sparse warnings about missing prototypes 2011-10-30 15:16:46 +01:00
switch_cpu64.S [S390] fix s390 assembler code alignments 2011-07-24 10:48:21 +02:00
switch_cpu.S [S390] fix s390 assembler code alignments 2011-07-24 10:48:21 +02:00
swsusp_asm64.S PM / Hibernate: Include storage keys in hibernation image on s390 2011-10-16 23:27:46 +02:00
sys_s390.c [S390] ipc: call generic sys_ipc demultiplexer 2011-12-27 11:27:13 +01:00
syscalls.S [S390] wire up process_vm syscalls 2011-11-14 11:19:08 +01:00
sysinfo.c [S390] sparse: fix sparse warnings in math-emu 2011-10-30 15:16:46 +01:00
time.c [S390] correct ktime to tod clock comparator conversion 2012-02-17 10:29:33 +01:00
topology.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2012-01-09 08:11:13 -08:00
traps.c [S390] Enable exception traces by default 2011-12-27 11:27:14 +01:00
vdso.c mm: arch: rename in_gate_area_no_task to in_gate_area_no_mm 2011-03-23 16:36:55 -04:00
vmlinux.lds.S [S390] cleanup entry point definition 2012-01-18 18:03:41 +01:00
vtime.c [S390] sparse: fix sparse static warnings 2011-10-30 15:16:46 +01:00