The patch titled
'sysctl_max_map_count' should be non-negative
has been removed from the -mm tree. Its filename was
sysctl_max_map_count-should-be-non-negative.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: 'sysctl_max_map_count' should be non-negative
From: Amerigo Wang <amwang@xxxxxxxxxx>
Jan Engelhardt reported we have this problem:
setting max_map_count to a value large enough results in programs dying at
first try. This is on 2.6.31.6:
15:59 borg:/proc/sys/vm # echo $[1<<31-1] >max_map_count
15:59 borg:/proc/sys/vm # cat max_map_count
1073741824
15:59 borg:/proc/sys/vm # echo $[1<<31] >max_map_count
15:59 borg:/proc/sys/vm # cat max_map_count
Killed
This is because we have a chance to make 'max_map_count' negative. but
it's meaningless. Make it only accept non-negative values.
Reported-by: Jan Engelhardt <jengelh@xxxxxxxxxx>
Signed-off-by: WANG Cong <amwang@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: James Morris <jmorris@xxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/sysctl.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN kernel/sysctl.c~sysctl_max_map_count-should-be-non-negative kernel/sysctl.c
--- a/kernel/sysctl.c~sysctl_max_map_count-should-be-non-negative
+++ a/kernel/sysctl.c
@@ -1131,7 +1131,8 @@ static struct ctl_table vm_table[] = {
.data = &sysctl_max_map_count,
.maxlen = sizeof(sysctl_max_map_count),
.mode = 0644,
- .proc_handler = proc_dointvec
+ .proc_handler = proc_dointvec,
+ .extra1 = &zero,
},
#else
{
_
Patches currently in -mm which might be from amwang@xxxxxxxxxx are
origin.patch
linux-next.patch
xtensa-use-generic-sys_pipe.patch
ipc-remove-unreachable-code-in-semc.patch
ipc-remove-unreachable-code-in-semc-fix.patch
ipc-hard_msgmax-should-be-higher-not-lower-on-64bit.patch
kexec-premit-reduction-of-the-reserved-memory-size.patch
kexec-premit-reduction-of-the-reserved-memory-size-fix.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
