Re: [syzbot] memory leak in crypto_create_tfm_node

[Dmitry Vyukov]

On Wed, 12 Oct 2022 at 11:23, Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote:
>
> Hi:
>
> I presume this is a leak in fscrypt (or perhaps something at an
> even higher level).

Eric sent this:

[PATCH] fscrypt: fix keyring memory leak on mount failure
https://lore.kernel.org/all/20221011213838.209879-1-ebiggers@xxxxxxxxxx/



> 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@xxxxxxxxxxxxxxxxxxxxxxxxx
> >
> > 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@xxxxxxxxxxxxxxxx.
> >
> > 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@xxxxxxxxxxxxxxxxxxx>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
>
> --
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