Re: memory leak in nfs_get_client

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Ugh.. Now that you can cancel the wait, you have to also handle if "new" was allocated. I think this needs: 

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index d7e4f0848e28..4d90f5bf0b0a 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -406,10 +406,10 @@ struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) 
                clp = nfs_match_client(cl_init);
                if (clp) {
                        spin_unlock(&nn->nfs_client_lock);
-                       if (IS_ERR(clp))
-                               return clp;
                        if (new)
                                new->rpc_ops->free_client(new);
+                       if (IS_ERR(clp))
+                               return clp;
                        return nfs_found_client(cl_init, clp);
                }
                if (new) {

I'll patch/test and send it along.

Ben


On 11 Jun 2019, at 0:05, syzbot wrote:


Hello,

syzbot found the following crash on:

HEAD commit:    d1fdb6d8 Linux 5.2-rc4
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=117e0f71a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=cb38d33cd06d8d48 dashboard link: https://syzkaller.appspot.com/bug?extid=7fe11b49c1cc30e3fce2 
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15a46001a00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=174b24d1a00000
IMPORTANT: if you fix the bug, please add the following tag to the commit: 
Reported-by: syzbot+7fe11b49c1cc30e3fce2@xxxxxxxxxxxxxxxxxxxxxxxxx

 fl=212 nc=0 na=0]
BUG: memory leak
unreferenced object 0xffff888121b91400 (size 1024):
  comm "syz-executor400", pid 6969, jiffies 4294941900 (age 18.210s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811e758400 (size 1024):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 18.150s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888118ef9360 (size 32):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 18.150s)
  hex dump (first 32 bytes):
    00 71 54 04 00 ea ff ff c0 6e 9a 04 00 ea ff ff  .qT......n......
    c0 0b 81 04 00 ea ff ff c0 05 86 04 00 ea ff ff  ................
  backtrace:
[<000000003e75bb46>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000003e75bb46>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000003e75bb46>] slab_alloc mm/slab.c:3326 [inline]
    [<000000003e75bb46>] __do_kmalloc mm/slab.c:3658 [inline]
[<000000003e75bb46>] __kmalloc_track_caller+0x15d/0x2c0 mm/slab.c:3675 
    [<0000000010f1326b>] kstrdup+0x3a/0x70 mm/util.c:52
[<0000000070b2f357>] nfs_alloc_client+0xbd/0x170 fs/nfs/client.c:169 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888121b91400 (size 1024):
  comm "syz-executor400", pid 6969, jiffies 4294941900 (age 19.230s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811e758400 (size 1024):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 19.170s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888118ef9360 (size 32):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 19.170s)
  hex dump (first 32 bytes):
    00 71 54 04 00 ea ff ff c0 6e 9a 04 00 ea ff ff  .qT......n......
    c0 0b 81 04 00 ea ff ff c0 05 86 04 00 ea ff ff  ................
  backtrace:
[<000000003e75bb46>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000003e75bb46>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000003e75bb46>] slab_alloc mm/slab.c:3326 [inline]
    [<000000003e75bb46>] __do_kmalloc mm/slab.c:3658 [inline]
[<000000003e75bb46>] __kmalloc_track_caller+0x15d/0x2c0 mm/slab.c:3675 
    [<0000000010f1326b>] kstrdup+0x3a/0x70 mm/util.c:52
[<0000000070b2f357>] nfs_alloc_client+0xbd/0x170 fs/nfs/client.c:169 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888121b91400 (size 1024):
  comm "syz-executor400", pid 6969, jiffies 4294941900 (age 21.200s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811e758400 (size 1024):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 21.140s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888118ef9360 (size 32):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 21.140s)
  hex dump (first 32 bytes):
    00 71 54 04 00 ea ff ff c0 6e 9a 04 00 ea ff ff  .qT......n......
    c0 0b 81 04 00 ea ff ff c0 05 86 04 00 ea ff ff  ................
  backtrace:
[<000000003e75bb46>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000003e75bb46>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000003e75bb46>] slab_alloc mm/slab.c:3326 [inline]
    [<000000003e75bb46>] __do_kmalloc mm/slab.c:3658 [inline]
[<000000003e75bb46>] __kmalloc_track_caller+0x15d/0x2c0 mm/slab.c:3675 
    [<0000000010f1326b>] kstrdup+0x3a/0x70 mm/util.c:52
[<0000000070b2f357>] nfs_alloc_client+0xbd/0x170 fs/nfs/client.c:169 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888121b91400 (size 1024):
  comm "syz-executor400", pid 6969, jiffies 4294941900 (age 22.200s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811e758400 (size 1024):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 22.140s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888118ef9360 (size 32):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 22.140s)
  hex dump (first 32 bytes):
    00 71 54 04 00 ea ff ff c0 6e 9a 04 00 ea ff ff  .qT......n......
    c0 0b 81 04 00 ea ff ff c0 05 86 04 00 ea ff ff  ................
  backtrace:
[<000000003e75bb46>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000003e75bb46>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000003e75bb46>] slab_alloc mm/slab.c:3326 [inline]
    [<000000003e75bb46>] __do_kmalloc mm/slab.c:3658 [inline]
[<000000003e75bb46>] __kmalloc_track_caller+0x15d/0x2c0 mm/slab.c:3675 
    [<0000000010f1326b>] kstrdup+0x3a/0x70 mm/util.c:52
[<0000000070b2f357>] nfs_alloc_client+0xbd/0x170 fs/nfs/client.c:169 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888121b91400 (size 1024):
  comm "syz-executor400", pid 6969, jiffies 4294941900 (age 23.180s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811e758400 (size 1024):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 23.120s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888118ef9360 (size 32):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 23.120s)
  hex dump (first 32 bytes):
    00 71 54 04 00 ea ff ff c0 6e 9a 04 00 ea ff ff  .qT......n......
    c0 0b 81 04 00 ea ff ff c0 05 86 04 00 ea ff ff  ................
  backtrace:
[<000000003e75bb46>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000003e75bb46>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000003e75bb46>] slab_alloc mm/slab.c:3326 [inline]
    [<000000003e75bb46>] __do_kmalloc mm/slab.c:3658 [inline]
[<000000003e75bb46>] __kmalloc_track_caller+0x15d/0x2c0 mm/slab.c:3675 
    [<0000000010f1326b>] kstrdup+0x3a/0x70 mm/util.c:52
[<0000000070b2f357>] nfs_alloc_client+0xbd/0x170 fs/nfs/client.c:169 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888121b91400 (size 1024):
  comm "syz-executor400", pid 6969, jiffies 4294941900 (age 24.200s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811e758400 (size 1024):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 24.140s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888118ef9360 (size 32):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 24.140s)
  hex dump (first 32 bytes):
    00 71 54 04 00 ea ff ff c0 6e 9a 04 00 ea ff ff  .qT......n......
    c0 0b 81 04 00 ea ff ff c0 05 86 04 00 ea ff ff  ................
  backtrace:
[<000000003e75bb46>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000003e75bb46>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000003e75bb46>] slab_alloc mm/slab.c:3326 [inline]
    [<000000003e75bb46>] __do_kmalloc mm/slab.c:3658 [inline]
[<000000003e75bb46>] __kmalloc_track_caller+0x15d/0x2c0 mm/slab.c:3675 
    [<0000000010f1326b>] kstrdup+0x3a/0x70 mm/util.c:52
[<0000000070b2f357>] nfs_alloc_client+0xbd/0x170 fs/nfs/client.c:169 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888121b91400 (size 1024):
  comm "syz-executor400", pid 6969, jiffies 4294941900 (age 25.180s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811e758400 (size 1024):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 25.120s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
[<000000009c69e9c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000009c69e9c0>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000009c69e9c0>] slab_alloc mm/slab.c:3326 [inline]
[<000000009c69e9c0>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 
    [<000000007d1011ce>] kmalloc include/linux/slab.h:547 [inline]
    [<000000007d1011ce>] kzalloc include/linux/slab.h:742 [inline]
[<000000007d1011ce>] nfs_alloc_client+0x2e/0x170 fs/nfs/client.c:152 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888118ef9360 (size 32):
  comm "syz-executor400", pid 6973, jiffies 4294941906 (age 25.120s)
  hex dump (first 32 bytes):
    00 71 54 04 00 ea ff ff c0 6e 9a 04 00 ea ff ff  .qT......n......
    c0 0b 81 04 00 ea ff ff c0 05 86 04 00 ea ff ff  ................
  backtrace:
[<000000003e75bb46>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] 
    [<000000003e75bb46>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000003e75bb46>] slab_alloc mm/slab.c:3326 [inline]
    [<000000003e75bb46>] __do_kmalloc mm/slab.c:3658 [inline]
[<000000003e75bb46>] __kmalloc_track_caller+0x15d/0x2c0 mm/slab.c:3675 
    [<0000000010f1326b>] kstrdup+0x3a/0x70 mm/util.c:52
[<0000000070b2f357>] nfs_alloc_client+0xbd/0x170 fs/nfs/client.c:169 [<000000007f1bdfa5>] nfs_get_client+0x1cb/0x500 fs/nfs/client.c:425 [<000000004dc18603>] nfs_init_server+0xc6/0x450 fs/nfs/client.c:671 [<0000000072615bbf>] nfs_create_server+0x83/0x1f0 fs/nfs/client.c:958 
    [<00000000d12e9a98>] nfs_try_mount+0x5a/0x350 fs/nfs/super.c:1883
    [<00000000b2735769>] nfs_fs_mount+0x448/0xc52 fs/nfs/super.c:2719
    [<000000000b19c7d0>] legacy_get_tree+0x27/0x80 fs/fs_context.c:661
    [<00000000d4887a5c>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<000000008eec78b0>] do_new_mount fs/namespace.c:2790 [inline]
    [<000000008eec78b0>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<00000000d0ad59a7>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<0000000082fa14d6>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<0000000082fa14d6>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<0000000082fa14d6>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
[<00000000ce916bab>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 
    [<0000000070865558>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

executing program


---
This bug is generated by a bot. It may contain errors.
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