From: "Luis R. Rodriguez" <mcg...@kernel.org> The user_header gets caught by kmemleak with the following splat as missing a free:
unreferenced object 0xffff99667a733d80 (size 96): comm "swapper/0", pid 1, jiffies 4294892317 (age 62191.468s) hex dump (first 32 bytes): a0 b6 92 b4 ff ff ff ff 00 00 00 00 01 00 00 00 ................ 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: kmemleak_alloc+0x4a/0xa0 __kmalloc+0x144/0x260 __register_sysctl_table+0x54/0x5e0 register_sysctl+0x1b/0x20 user_namespace_sysctl_init+0x17/0x34 do_one_initcall+0x52/0x1a0 kernel_init_freeable+0x173/0x200 kernel_init+0xe/0x100 ret_from_fork+0x2c/0x40 The BUG_ON()s are intended to crash so no need to clean up after ourselves on error there. This is also a kernel/ subsys_init() we don't need a respective exit call here as this is never modular, so just white list it. Link: http://lkml.kernel.org/r/20170203211404.31458-1-mcg...@kernel.org Signed-off-by: Luis R. Rodriguez <mcg...@kernel.org> Cc: Eric W. Biederman <ebied...@xmission.com> Cc: Kees Cook <keesc...@chromium.org> Cc: Nikolay Borisov <n.borisov.l...@gmail.com> Cc: Serge Hallyn <se...@hallyn.com> Cc: Jan Kara <j...@suse.cz> Signed-off-by: Andrew Morton <a...@linux-foundation.org> Signed-off-by: Linus Torvalds <torva...@linux-foundation.org> https://jira.sw.ru/browse/PSBM-76924 (cherry picked from commit ed5bd7dc88edf4a4a9c67130742b1b59aa017a5f) Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com> --- kernel/ucount.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/ucount.c b/kernel/ucount.c index 4aea3f02f287..533f78323f27 100644 --- a/kernel/ucount.c +++ b/kernel/ucount.c @@ -241,11 +241,10 @@ static __init int user_namespace_sysctl_init(void) * properly. */ user_header = register_sysctl("user", empty); + kmemleak_ignore(user_header); BUG_ON(!user_header); BUG_ON(!setup_userns_sysctls(&init_user_ns)); #endif return 0; } subsys_initcall(user_namespace_sysctl_init); - - -- 2.13.6 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel