The patch titled
Fix UTS corruption during clone(CLONE_NEWUTS)
has been added to the -mm tree. Its filename is
fix-uts-corruption-during-cloneclone_newuts.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Fix UTS corruption during clone(CLONE_NEWUTS)
From: Alexey Dobriyan <adobriyan@xxxxx>
struct utsname is copied from master one without any exclusion.
Here is sample output from one proggie doing
sethostname("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
sethostname("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
and another
clone(,, CLONE_NEWUTS, ...)
uname()
hostname = 'aaaaaaaaaaaaaaaaaaaaaaaaabbbbb'
hostname = 'bbbaaaaaaaaaaaaaaaaaaaaaaaaaaa'
hostname = 'aaaaaaaabbbbbbbbbbbbbbbbbbbbbb'
hostname = 'aaaaaaaaaaaaaaaaaaaaaaaaaabbbb'
hostname = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaabb'
hostname = 'aaabbbbbbbbbbbbbbbbbbbbbbbbbbb'
hostname = 'bbbbbbbbbbbbbbbbaaaaaaaaaaaaaa'
Hostname is sometimes corrupted.
Yes, even _the_ simplest namespace activity had bug in it. :-(
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxx>
Acked-by: Serge Hallyn <serue@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/utsname.c | 2 ++
1 files changed, 2 insertions(+)
diff -puN kernel/utsname.c~fix-uts-corruption-during-cloneclone_newuts kernel/utsname.c
--- a/kernel/utsname.c~fix-uts-corruption-during-cloneclone_newuts
+++ a/kernel/utsname.c
@@ -28,7 +28,9 @@ static struct uts_namespace *clone_uts_n
if (!ns)
return ERR_PTR(-ENOMEM);
+ down_read(&uts_sem);
memcpy(&ns->name, &old_ns->name, sizeof(ns->name));
+ up_read(&uts_sem);
kref_init(&ns->kref);
return ns;
}
_
Patches currently in -mm which might be from adobriyan@xxxxx are
fix-uts-corruption-during-cloneclone_newuts.patch
consolidate-ptrace_detach.patch
git-kbuild.patch
use-list_head-in-binfmt-handling-update.patch
make-unregister_binfmt-return-void.patch
slab_panic-more-proc-posix-timers-shmem.patch
add-kernel-notifierc.patch
add-kernel-notifierc-fix.patch
add-kernel-notifierc-fix-2.patch
tweak-proc-ipmi-removal.patch
shrink-task_struct-if-config_futex=n.patch
sysctl-core-stop-using-the-unnecessary-ctl_table-typedef.patch
sysctl-factor-out-sysctl_data.patch
sysct-mqueue-remove-the-binary-sysctl-numbers.patch
sysctl-remove-binary-sysctl-support-where-it-clearly-doesnt-work.patch
sysctl-fix-neighbour-table-sysctls.patch
sysctl-ipv6-route-flushing-kill-binary-path.patch
sysctl-remove-broken-sunrpc-debug-binary-sysctls.patch
sysctl-x86_64-remove-unnecessary-binary-paths.patch
sysctl-remove-broken-cdrom-binary-sysctls.patch
sysctl-ipv4-remove-binary-sysctl-paths-where-they-are-broken.patch
sysctl-remove-the-binary-interface-for-aio-nr-aio-max-nr-acpi_video_flags.patch
sysctl-error-on-bad-sysctl-tables.patch
sysctl-update-sysctl_check_table.patch
single_open-seq_release-leak-diagnostics.patch
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