linux-kernel - Re: [syzbot] memory leak in crypto_create_tfm

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Message-ID: <Y0aHieBUF+CY2rTT@gondor.apana.org.au>
Date:   Wed, 12 Oct 2022 17:23:21 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     syzbot <syzbot+104c2a89561289cec13e@...kaller.appspotmail.com>,
        "Theodore Y. Ts'o" <tytso@....edu>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Eric Biggers <ebiggers@...nel.org>,
        linux-fscrypt@...r.kernel.org
Cc:     davem@...emloft.net, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] memory leak in crypto_create_tfm_node

Hi:

I presume this is a leak in fscrypt (or perhaps something at an
even higher level).

Thanks,

On Tue, Oct 11, 2022 at 01:46:41PM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    4c86114194e6 Merge tag 'iomap-6.1-merge-1' of git://git.ke..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=104827bc880000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=10f41fbb818af57a
> dashboard link: https://syzkaller.appspot.com/bug?extid=104c2a89561289cec13e
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17a1d5fa880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12f77e34880000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/47a35ffaaa39/disk-4c861141.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/cc11d48eaf17/vmlinux-4c861141.xz
> mounted in repro: https://storage.googleapis.com/syzbot-assets/c14465c5ddba/mount_0.gz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+104c2a89561289cec13e@...kaller.appspotmail.com
> 
> BUG: memory leak
> unreferenced object 0xffff8881024bd800 (size 512):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 21.340s)
>   hex dump (first 32 bytes):
>     d8 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff  ................
>     e0 be 2a 82 ff ff ff ff 68 fc 1c 08 81 88 ff ff  ..*.....h.......
>   backtrace:
>     [<ffffffff822a2f30>] kmalloc_node include/linux/slab.h:623 [inline]
>     [<ffffffff822a2f30>] kzalloc_node include/linux/slab.h:744 [inline]
>     [<ffffffff822a2f30>] crypto_create_tfm_node+0x30/0x130 crypto/api.c:504
>     [<ffffffff822a3816>] crypto_alloc_tfm_node+0x96/0x180 crypto/api.c:588
>     [<ffffffff8168ccdc>] fscrypt_init_hkdf+0x3c/0x180 fs/crypto/hkdf.c:75
>     [<ffffffff8168eb90>] add_master_key+0x160/0x370 fs/crypto/keyring.c:535
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff88810eb2e740 (size 32):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 21.340s)
>   hex dump (first 32 bytes):
>     d0 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff  ................
>     00 00 00 00 00 00 00 00 20 cb c7 85 ff ff ff ff  ........ .......
>   backtrace:
>     [<ffffffff822a2f30>] kmalloc_node include/linux/slab.h:623 [inline]
>     [<ffffffff822a2f30>] kzalloc_node include/linux/slab.h:744 [inline]
>     [<ffffffff822a2f30>] crypto_create_tfm_node+0x30/0x130 crypto/api.c:504
>     [<ffffffff822a50f5>] crypto_create_tfm crypto/internal.h:92 [inline]
>     [<ffffffff822a50f5>] crypto_spawn_tfm2+0x45/0x90 crypto/algapi.c:803
>     [<ffffffff822b4c1b>] crypto_spawn_shash include/crypto/internal/hash.h:231 [inline]
>     [<ffffffff822b4c1b>] hmac_init_tfm+0x3b/0xa0 crypto/hmac.c:152
>     [<ffffffff822ac8c7>] crypto_shash_init_tfm+0x77/0xf0 crypto/shash.c:440
>     [<ffffffff822a2f52>] crypto_create_tfm_node+0x52/0x130 crypto/api.c:512
>     [<ffffffff822a3816>] crypto_alloc_tfm_node+0x96/0x180 crypto/api.c:588
>     [<ffffffff8168ccdc>] fscrypt_init_hkdf+0x3c/0x180 fs/crypto/hkdf.c:75
>     [<ffffffff8168eb90>] add_master_key+0x160/0x370 fs/crypto/keyring.c:535
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
> 
> BUG: memory leak
> unreferenced object 0xffff88810a9a1800 (size 2048):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 21.340s)
>   hex dump (first 32 bytes):
>     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 00  ................
>   backtrace:
>     [<ffffffff8168ecf6>] kmalloc include/linux/slab.h:600 [inline]
>     [<ffffffff8168ecf6>] kzalloc include/linux/slab.h:733 [inline]
>     [<ffffffff8168ecf6>] allocate_filesystem_keyring fs/crypto/keyring.c:194 [inline]
>     [<ffffffff8168ecf6>] do_add_master_key fs/crypto/keyring.c:502 [inline]
>     [<ffffffff8168ecf6>] add_master_key+0x2c6/0x370 fs/crypto/keyring.c:554
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff88810a820800 (size 1024):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 21.340s)
>   hex dump (first 32 bytes):
>     00 b0 a4 0e 81 88 ff ff 00 00 00 00 00 00 00 00  ................
>     58 19 9a 0a 81 88 ff ff 00 00 00 00 00 00 00 00  X...............
>   backtrace:
>     [<ffffffff8168e25a>] kmalloc include/linux/slab.h:600 [inline]
>     [<ffffffff8168e25a>] kzalloc include/linux/slab.h:733 [inline]
>     [<ffffffff8168e25a>] add_new_master_key+0x4a/0x250 fs/crypto/keyring.c:418
>     [<ffffffff8168ec10>] do_add_master_key fs/crypto/keyring.c:504 [inline]
>     [<ffffffff8168ec10>] add_master_key+0x1e0/0x370 fs/crypto/keyring.c:554
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff8881024bd800 (size 512):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 24.890s)
>   hex dump (first 32 bytes):
>     d8 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff  ................
>     e0 be 2a 82 ff ff ff ff 68 fc 1c 08 81 88 ff ff  ..*.....h.......
>   backtrace:
>     [<ffffffff822a2f30>] kmalloc_node include/linux/slab.h:623 [inline]
>     [<ffffffff822a2f30>] kzalloc_node include/linux/slab.h:744 [inline]
>     [<ffffffff822a2f30>] crypto_create_tfm_node+0x30/0x130 crypto/api.c:504
>     [<ffffffff822a3816>] crypto_alloc_tfm_node+0x96/0x180 crypto/api.c:588
>     [<ffffffff8168ccdc>] fscrypt_init_hkdf+0x3c/0x180 fs/crypto/hkdf.c:75
>     [<ffffffff8168eb90>] add_master_key+0x160/0x370 fs/crypto/keyring.c:535
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff88810eb2e740 (size 32):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 24.890s)
>   hex dump (first 32 bytes):
>     d0 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff  ................
>     00 00 00 00 00 00 00 00 20 cb c7 85 ff ff ff ff  ........ .......
>   backtrace:
>     [<ffffffff822a2f30>] kmalloc_node include/linux/slab.h:623 [inline]
>     [<ffffffff822a2f30>] kzalloc_node include/linux/slab.h:744 [inline]
>     [<ffffffff822a2f30>] crypto_create_tfm_node+0x30/0x130 crypto/api.c:504
>     [<ffffffff822a50f5>] crypto_create_tfm crypto/internal.h:92 [inline]
>     [<ffffffff822a50f5>] crypto_spawn_tfm2+0x45/0x90 crypto/algapi.c:803
>     [<ffffffff822b4c1b>] crypto_spawn_shash include/crypto/internal/hash.h:231 [inline]
>     [<ffffffff822b4c1b>] hmac_init_tfm+0x3b/0xa0 crypto/hmac.c:152
>     [<ffffffff822ac8c7>] crypto_shash_init_tfm+0x77/0xf0 crypto/shash.c:440
>     [<ffffffff822a2f52>] crypto_create_tfm_node+0x52/0x130 crypto/api.c:512
>     [<ffffffff822a3816>] crypto_alloc_tfm_node+0x96/0x180 crypto/api.c:588
>     [<ffffffff8168ccdc>] fscrypt_init_hkdf+0x3c/0x180 fs/crypto/hkdf.c:75
>     [<ffffffff8168eb90>] add_master_key+0x160/0x370 fs/crypto/keyring.c:535
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
> 
> BUG: memory leak
> unreferenced object 0xffff88810a9a1800 (size 2048):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 24.890s)
>   hex dump (first 32 bytes):
>     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 00  ................
>   backtrace:
>     [<ffffffff8168ecf6>] kmalloc include/linux/slab.h:600 [inline]
>     [<ffffffff8168ecf6>] kzalloc include/linux/slab.h:733 [inline]
>     [<ffffffff8168ecf6>] allocate_filesystem_keyring fs/crypto/keyring.c:194 [inline]
>     [<ffffffff8168ecf6>] do_add_master_key fs/crypto/keyring.c:502 [inline]
>     [<ffffffff8168ecf6>] add_master_key+0x2c6/0x370 fs/crypto/keyring.c:554
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff88810a820800 (size 1024):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 24.890s)
>   hex dump (first 32 bytes):
>     00 b0 a4 0e 81 88 ff ff 00 00 00 00 00 00 00 00  ................
>     58 19 9a 0a 81 88 ff ff 00 00 00 00 00 00 00 00  X...............
>   backtrace:
>     [<ffffffff8168e25a>] kmalloc include/linux/slab.h:600 [inline]
>     [<ffffffff8168e25a>] kzalloc include/linux/slab.h:733 [inline]
>     [<ffffffff8168e25a>] add_new_master_key+0x4a/0x250 fs/crypto/keyring.c:418
>     [<ffffffff8168ec10>] do_add_master_key fs/crypto/keyring.c:504 [inline]
>     [<ffffffff8168ec10>] add_master_key+0x1e0/0x370 fs/crypto/keyring.c:554
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff8881024bd800 (size 512):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 27.260s)
>   hex dump (first 32 bytes):
>     d8 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff  ................
>     e0 be 2a 82 ff ff ff ff 68 fc 1c 08 81 88 ff ff  ..*.....h.......
>   backtrace:
>     [<ffffffff822a2f30>] kmalloc_node include/linux/slab.h:623 [inline]
>     [<ffffffff822a2f30>] kzalloc_node include/linux/slab.h:744 [inline]
>     [<ffffffff822a2f30>] crypto_create_tfm_node+0x30/0x130 crypto/api.c:504
>     [<ffffffff822a3816>] crypto_alloc_tfm_node+0x96/0x180 crypto/api.c:588
>     [<ffffffff8168ccdc>] fscrypt_init_hkdf+0x3c/0x180 fs/crypto/hkdf.c:75
>     [<ffffffff8168eb90>] add_master_key+0x160/0x370 fs/crypto/keyring.c:535
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff88810eb2e740 (size 32):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 27.260s)
>   hex dump (first 32 bytes):
>     d0 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff  ................
>     00 00 00 00 00 00 00 00 20 cb c7 85 ff ff ff ff  ........ .......
>   backtrace:
>     [<ffffffff822a2f30>] kmalloc_node include/linux/slab.h:623 [inline]
>     [<ffffffff822a2f30>] kzalloc_node include/linux/slab.h:744 [inline]
>     [<ffffffff822a2f30>] crypto_create_tfm_node+0x30/0x130 crypto/api.c:504
>     [<ffffffff822a50f5>] crypto_create_tfm crypto/internal.h:92 [inline]
>     [<ffffffff822a50f5>] crypto_spawn_tfm2+0x45/0x90 crypto/algapi.c:803
>     [<ffffffff822b4c1b>] crypto_spawn_shash include/crypto/internal/hash.h:231 [inline]
>     [<ffffffff822b4c1b>] hmac_init_tfm+0x3b/0xa0 crypto/hmac.c:152
>     [<ffffffff822ac8c7>] crypto_shash_init_tfm+0x77/0xf0 crypto/shash.c:440
>     [<ffffffff822a2f52>] crypto_create_tfm_node+0x52/0x130 crypto/api.c:512
>     [<ffffffff822a3816>] crypto_alloc_tfm_node+0x96/0x180 crypto/api.c:588
>     [<ffffffff8168ccdc>] fscrypt_init_hkdf+0x3c/0x180 fs/crypto/hkdf.c:75
>     [<ffffffff8168eb90>] add_master_key+0x160/0x370 fs/crypto/keyring.c:535
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
> 
> BUG: memory leak
> unreferenced object 0xffff88810a9a1800 (size 2048):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 27.260s)
>   hex dump (first 32 bytes):
>     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 00  ................
>   backtrace:
>     [<ffffffff8168ecf6>] kmalloc include/linux/slab.h:600 [inline]
>     [<ffffffff8168ecf6>] kzalloc include/linux/slab.h:733 [inline]
>     [<ffffffff8168ecf6>] allocate_filesystem_keyring fs/crypto/keyring.c:194 [inline]
>     [<ffffffff8168ecf6>] do_add_master_key fs/crypto/keyring.c:502 [inline]
>     [<ffffffff8168ecf6>] add_master_key+0x2c6/0x370 fs/crypto/keyring.c:554
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff88810a820800 (size 1024):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 27.260s)
>   hex dump (first 32 bytes):
>     00 b0 a4 0e 81 88 ff ff 00 00 00 00 00 00 00 00  ................
>     58 19 9a 0a 81 88 ff ff 00 00 00 00 00 00 00 00  X...............
>   backtrace:
>     [<ffffffff8168e25a>] kmalloc include/linux/slab.h:600 [inline]
>     [<ffffffff8168e25a>] kzalloc include/linux/slab.h:733 [inline]
>     [<ffffffff8168e25a>] add_new_master_key+0x4a/0x250 fs/crypto/keyring.c:418
>     [<ffffffff8168ec10>] do_add_master_key fs/crypto/keyring.c:504 [inline]
>     [<ffffffff8168ec10>] add_master_key+0x1e0/0x370 fs/crypto/keyring.c:554
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff8881024bd800 (size 512):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 28.460s)
>   hex dump (first 32 bytes):
>     d8 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff  ................
>     e0 be 2a 82 ff ff ff ff 68 fc 1c 08 81 88 ff ff  ..*.....h.......
>   backtrace:
>     [<ffffffff822a2f30>] kmalloc_node include/linux/slab.h:623 [inline]
>     [<ffffffff822a2f30>] kzalloc_node include/linux/slab.h:744 [inline]
>     [<ffffffff822a2f30>] crypto_create_tfm_node+0x30/0x130 crypto/api.c:504
>     [<ffffffff822a3816>] crypto_alloc_tfm_node+0x96/0x180 crypto/api.c:588
>     [<ffffffff8168ccdc>] fscrypt_init_hkdf+0x3c/0x180 fs/crypto/hkdf.c:75
>     [<ffffffff8168eb90>] add_master_key+0x160/0x370 fs/crypto/keyring.c:535
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff88810eb2e740 (size 32):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 28.460s)
>   hex dump (first 32 bytes):
>     d0 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff  ................
>     00 00 00 00 00 00 00 00 20 cb c7 85 ff ff ff ff  ........ .......
>   backtrace:
>     [<ffffffff822a2f30>] kmalloc_node include/linux/slab.h:623 [inline]
>     [<ffffffff822a2f30>] kzalloc_node include/linux/slab.h:744 [inline]
>     [<ffffffff822a2f30>] crypto_create_tfm_node+0x30/0x130 crypto/api.c:504
>     [<ffffffff822a50f5>] crypto_create_tfm crypto/internal.h:92 [inline]
>     [<ffffffff822a50f5>] crypto_spawn_tfm2+0x45/0x90 crypto/algapi.c:803
>     [<ffffffff822b4c1b>] crypto_spawn_shash include/crypto/internal/hash.h:231 [inline]
>     [<ffffffff822b4c1b>] hmac_init_tfm+0x3b/0xa0 crypto/hmac.c:152
>     [<ffffffff822ac8c7>] crypto_shash_init_tfm+0x77/0xf0 crypto/shash.c:440
>     [<ffffffff822a2f52>] crypto_create_tfm_node+0x52/0x130 crypto/api.c:512
>     [<ffffffff822a3816>] crypto_alloc_tfm_node+0x96/0x180 crypto/api.c:588
>     [<ffffffff8168ccdc>] fscrypt_init_hkdf+0x3c/0x180 fs/crypto/hkdf.c:75
>     [<ffffffff8168eb90>] add_master_key+0x160/0x370 fs/crypto/keyring.c:535
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
> 
> BUG: memory leak
> unreferenced object 0xffff88810a9a1800 (size 2048):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 28.460s)
>   hex dump (first 32 bytes):
>     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 00  ................
>   backtrace:
>     [<ffffffff8168ecf6>] kmalloc include/linux/slab.h:600 [inline]
>     [<ffffffff8168ecf6>] kzalloc include/linux/slab.h:733 [inline]
>     [<ffffffff8168ecf6>] allocate_filesystem_keyring fs/crypto/keyring.c:194 [inline]
>     [<ffffffff8168ecf6>] do_add_master_key fs/crypto/keyring.c:502 [inline]
>     [<ffffffff8168ecf6>] add_master_key+0x2c6/0x370 fs/crypto/keyring.c:554
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff88810a820800 (size 1024):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 28.460s)
>   hex dump (first 32 bytes):
>     00 b0 a4 0e 81 88 ff ff 00 00 00 00 00 00 00 00  ................
>     58 19 9a 0a 81 88 ff ff 00 00 00 00 00 00 00 00  X...............
>   backtrace:
>     [<ffffffff8168e25a>] kmalloc include/linux/slab.h:600 [inline]
>     [<ffffffff8168e25a>] kzalloc include/linux/slab.h:733 [inline]
>     [<ffffffff8168e25a>] add_new_master_key+0x4a/0x250 fs/crypto/keyring.c:418
>     [<ffffffff8168ec10>] do_add_master_key fs/crypto/keyring.c:504 [inline]
>     [<ffffffff8168ec10>] add_master_key+0x1e0/0x370 fs/crypto/keyring.c:554
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff8881024bd800 (size 512):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 29.660s)
>   hex dump (first 32 bytes):
>     d8 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff  ................
>     e0 be 2a 82 ff ff ff ff 68 fc 1c 08 81 88 ff ff  ..*.....h.......
>   backtrace:
>     [<ffffffff822a2f30>] kmalloc_node include/linux/slab.h:623 [inline]
>     [<ffffffff822a2f30>] kzalloc_node include/linux/slab.h:744 [inline]
>     [<ffffffff822a2f30>] crypto_create_tfm_node+0x30/0x130 crypto/api.c:504
>     [<ffffffff822a3816>] crypto_alloc_tfm_node+0x96/0x180 crypto/api.c:588
>     [<ffffffff8168ccdc>] fscrypt_init_hkdf+0x3c/0x180 fs/crypto/hkdf.c:75
>     [<ffffffff8168eb90>] add_master_key+0x160/0x370 fs/crypto/keyring.c:535
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff88810eb2e740 (size 32):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 29.660s)
>   hex dump (first 32 bytes):
>     d0 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff  ................
>     00 00 00 00 00 00 00 00 20 cb c7 85 ff ff ff ff  ........ .......
>   backtrace:
>     [<ffffffff822a2f30>] kmalloc_node include/linux/slab.h:623 [inline]
>     [<ffffffff822a2f30>] kzalloc_node include/linux/slab.h:744 [inline]
>     [<ffffffff822a2f30>] crypto_create_tfm_node+0x30/0x130 crypto/api.c:504
>     [<ffffffff822a50f5>] crypto_create_tfm crypto/internal.h:92 [inline]
>     [<ffffffff822a50f5>] crypto_spawn_tfm2+0x45/0x90 crypto/algapi.c:803
>     [<ffffffff822b4c1b>] crypto_spawn_shash include/crypto/internal/hash.h:231 [inline]
>     [<ffffffff822b4c1b>] hmac_init_tfm+0x3b/0xa0 crypto/hmac.c:152
>     [<ffffffff822ac8c7>] crypto_shash_init_tfm+0x77/0xf0 crypto/shash.c:440
>     [<ffffffff822a2f52>] crypto_create_tfm_node+0x52/0x130 crypto/api.c:512
>     [<ffffffff822a3816>] crypto_alloc_tfm_node+0x96/0x180 crypto/api.c:588
>     [<ffffffff8168ccdc>] fscrypt_init_hkdf+0x3c/0x180 fs/crypto/hkdf.c:75
>     [<ffffffff8168eb90>] add_master_key+0x160/0x370 fs/crypto/keyring.c:535
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
> 
> BUG: memory leak
> unreferenced object 0xffff88810a9a1800 (size 2048):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 29.660s)
>   hex dump (first 32 bytes):
>     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 00  ................
>   backtrace:
>     [<ffffffff8168ecf6>] kmalloc include/linux/slab.h:600 [inline]
>     [<ffffffff8168ecf6>] kzalloc include/linux/slab.h:733 [inline]
>     [<ffffffff8168ecf6>] allocate_filesystem_keyring fs/crypto/keyring.c:194 [inline]
>     [<ffffffff8168ecf6>] do_add_master_key fs/crypto/keyring.c:502 [inline]
>     [<ffffffff8168ecf6>] add_master_key+0x2c6/0x370 fs/crypto/keyring.c:554
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> BUG: memory leak
> unreferenced object 0xffff88810a820800 (size 1024):
>   comm "syz-executor361", pid 3670, jiffies 4294954234 (age 29.660s)
>   hex dump (first 32 bytes):
>     00 b0 a4 0e 81 88 ff ff 00 00 00 00 00 00 00 00  ................
>     58 19 9a 0a 81 88 ff ff 00 00 00 00 00 00 00 00  X...............
>   backtrace:
>     [<ffffffff8168e25a>] kmalloc include/linux/slab.h:600 [inline]
>     [<ffffffff8168e25a>] kzalloc include/linux/slab.h:733 [inline]
>     [<ffffffff8168e25a>] add_new_master_key+0x4a/0x250 fs/crypto/keyring.c:418
>     [<ffffffff8168ec10>] do_add_master_key fs/crypto/keyring.c:504 [inline]
>     [<ffffffff8168ec10>] add_master_key+0x1e0/0x370 fs/crypto/keyring.c:554
>     [<ffffffff8168f233>] fscrypt_add_test_dummy_key+0x93/0xc0 fs/crypto/keyring.c:801
>     [<ffffffff8180b59a>] ext4_check_test_dummy_encryption fs/ext4/super.c:2680 [inline]
>     [<ffffffff8180b59a>] ext4_check_opt_consistency+0x79a/0xb80 fs/ext4/super.c:2735
>     [<ffffffff818119f6>] __ext4_fill_super fs/ext4/super.c:5095 [inline]
>     [<ffffffff818119f6>] ext4_fill_super+0xb66/0x5080 fs/ext4/super.c:5648
>     [<ffffffff815e7851>] get_tree_bdev+0x1f1/0x320 fs/super.c:1323
>     [<ffffffff815e5a88>] vfs_get_tree+0x28/0x100 fs/super.c:1530
>     [<ffffffff81629be7>] do_new_mount fs/namespace.c:3040 [inline]
>     [<ffffffff81629be7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
>     [<ffffffff8162a7ce>] do_mount fs/namespace.c:3383 [inline]
>     [<ffffffff8162a7ce>] __do_sys_mount fs/namespace.c:3591 [inline]
>     [<ffffffff8162a7ce>] __se_sys_mount fs/namespace.c:3568 [inline]
>     [<ffffffff8162a7ce>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
>     [<ffffffff8460f1e5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>     [<ffffffff8460f1e5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
>     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> 
> executing program
> executing program
> executing program
> 
> 
> ---
> This report is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@...glegroups.com.
> 
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> syzbot can test patches for this issue, for details see:
> https://goo.gl/tpsmEJ#testing-patches

-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt