The following commit has been merged into the efi/urgent branch of tip:

Commit-ID: fe5186cf12e30facfe261e9be6c7904a170bd822 Gitweb: https://git.kernel.org/tip/fe5186cf12e30facfe261e9be6c7904a170bd822 Author: Vamshi K Sthambamkadi vamshi.k.sthambamkadi@gmail.com AuthorDate: Fri, 23 Oct 2020 17:24:39 +05:30 Committer: Ard Biesheuvel ardb@kernel.org CommitterDate: Mon, 26 Oct 2020 08:15:24 +01:00

efivarfs: fix memory leak in efivarfs_create()

kmemleak report: unreferenced object 0xffff9b8915fcb000 (size 4096): comm "efivarfs.sh", pid 2360, jiffies 4294920096 (age 48.264s) hex dump (first 32 bytes): 2d 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -............... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000cc4d897c>] kmem_cache_alloc_trace+0x155/0x4b0 [<000000007d1dfa72>] efivarfs_create+0x6e/0x1a0 [<00000000e6ee18fc>] path_openat+0xe4b/0x1120 [<000000000ad0414f>] do_filp_open+0x91/0x100 [<00000000ce93a198>] do_sys_openat2+0x20c/0x2d0 [<000000002a91be6d>] do_sys_open+0x46/0x80 [<000000000a854999>] __x64_sys_openat+0x20/0x30 [<00000000c50d89c9>] do_syscall_64+0x38/0x90 [<00000000cecd6b5f>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

In efivarfs_create(), inode->i_private is setup with efivar_entry object which is never freed.

Cc: stable@vger.kernel.org Signed-off-by: Vamshi K Sthambamkadi vamshi.k.sthambamkadi@gmail.com Link: https://lore.kernel.org/r/20201023115429.GA2479@cosmos Signed-off-by: Ard Biesheuvel ardb@kernel.org --- fs/efivarfs/super.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c index 15880a6..f943fd0 100644 --- a/fs/efivarfs/super.c +++ b/fs/efivarfs/super.c @@ -21,6 +21,7 @@ LIST_HEAD(efivarfs_list); static void efivarfs_evict_inode(struct inode *inode) { clear_inode(inode); + kfree(inode->i_private); }

static const struct super_operations efivarfs_ops = {