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| author | Vamshi K Sthambamkadi <vamshi.k.sthambamkadi@gmail.com> | 2020-10-23 17:24:39 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-24 13:27:24 +0100 |
| commit | 3a07581b04648c8acb634045c7060db392853efe (patch) | |
| tree | 4f95802efdcfe7c0128131ed393e4efa7194bd89 /fs/efivarfs | |
| parent | 123667ed90ef625ced9d0d071dc889985bfc6d55 (diff) | |
| download | linux-stable-3a07581b04648c8acb634045c7060db392853efe.tar.gz linux-stable-3a07581b04648c8acb634045c7060db392853efe.tar.bz2 linux-stable-3a07581b04648c8acb634045c7060db392853efe.zip | |
efivarfs: fix memory leak in efivarfs_create()
commit fe5186cf12e30facfe261e9be6c7904a170bd822 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/efivarfs')
| -rw-r--r-- | fs/efivarfs/super.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c index 834615f13f3e..7808a26bd33f 100644 --- a/fs/efivarfs/super.c +++ b/fs/efivarfs/super.c @@ -23,6 +23,7 @@ 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 = { |