[syzbot] [btrfs?] memory leak in add_block_entry

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Hello,

syzbot found the following issue on:

HEAD commit:    f8dba31b0a82 Merge tag 'asym-keys-fix-for-linus-v6.4-rc5' ..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11aa7b15280000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ee975febba574924
dashboard link: https://syzkaller.appspot.com/bug?extid=c563a3c79927971f950f
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=173fab79280000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10b4622d280000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/4a6b265f7061/disk-f8dba31b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/430b37c501c8/vmlinux-f8dba31b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/112fa4e51bb8/bzImage-f8dba31b.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/11e3e386cf39/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c563a3c79927971f950f@xxxxxxxxxxxxxxxxxxxxxxxxx

BUG: memory leak
unreferenced object 0xffff888109b51580 (size 96):
  comm "syz-executor154", pid 5193, jiffies 4294972644 (age 19.050s)
  hex dump (first 32 bytes):
    00 10 10 00 00 00 00 00 00 10 00 00 00 00 00 00  ................
    01 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00  ................
  backtrace:
    [<ffffffff81545a34>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff8213b65e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8213b65e>] kzalloc include/linux/slab.h:680 [inline]
    [<ffffffff8213b65e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271
    [<ffffffff8213bcfe>] add_tree_block+0x9e/0x220 fs/btrfs/ref-verify.c:332
    [<ffffffff8213d245>] btrfs_build_ref_tree+0x535/0x7c0 fs/btrfs/ref-verify.c:474
    [<ffffffff8202b2f1>] open_ctree+0x12d1/0x2360 fs/btrfs/disk-io.c:3710
    [<ffffffff81ff2e53>] btrfs_fill_super fs/btrfs/super.c:1156 [inline]
    [<ffffffff81ff2e53>] btrfs_mount_root+0x583/0x710 fs/btrfs/super.c:1524
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff81698e91>] fc_mount fs/namespace.c:1035 [inline]
    [<ffffffff81698e91>] vfs_kern_mount.part.0+0xd1/0x120 fs/namespace.c:1065
    [<ffffffff81698f20>] vfs_kern_mount+0x40/0x60 fs/namespace.c:1052
    [<ffffffff81ff6e8d>] btrfs_mount+0x19d/0x620 fs/btrfs/super.c:1584
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff816a0ac3>] do_new_mount fs/namespace.c:3039 [inline]
    [<ffffffff816a0ac3>] path_mount+0xc53/0x10f0 fs/namespace.c:3369
    [<ffffffff816a1702>] do_mount fs/namespace.c:3382 [inline]
    [<ffffffff816a1702>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff816a1702>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff816a1702>] __x64_sys_mount+0x192/0x1e0 fs/namespace.c:3568
    [<ffffffff84a16749>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a16749>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80

BUG: memory leak
unreferenced object 0xffff888109b51500 (size 96):
  comm "syz-executor154", pid 5193, jiffies 4294972644 (age 19.050s)
  hex dump (first 32 bytes):
    00 30 50 00 00 00 00 00 00 10 00 00 00 00 00 00  .0P.............
    01 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00  ................
  backtrace:
    [<ffffffff81545a34>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff8213b65e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8213b65e>] kzalloc include/linux/slab.h:680 [inline]
    [<ffffffff8213b65e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271
    [<ffffffff8213bcfe>] add_tree_block+0x9e/0x220 fs/btrfs/ref-verify.c:332
    [<ffffffff8213d245>] btrfs_build_ref_tree+0x535/0x7c0 fs/btrfs/ref-verify.c:474
    [<ffffffff8202b2f1>] open_ctree+0x12d1/0x2360 fs/btrfs/disk-io.c:3710
    [<ffffffff81ff2e53>] btrfs_fill_super fs/btrfs/super.c:1156 [inline]
    [<ffffffff81ff2e53>] btrfs_mount_root+0x583/0x710 fs/btrfs/super.c:1524
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff81698e91>] fc_mount fs/namespace.c:1035 [inline]
    [<ffffffff81698e91>] vfs_kern_mount.part.0+0xd1/0x120 fs/namespace.c:1065
    [<ffffffff81698f20>] vfs_kern_mount+0x40/0x60 fs/namespace.c:1052
    [<ffffffff81ff6e8d>] btrfs_mount+0x19d/0x620 fs/btrfs/super.c:1584
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff816a0ac3>] do_new_mount fs/namespace.c:3039 [inline]
    [<ffffffff816a0ac3>] path_mount+0xc53/0x10f0 fs/namespace.c:3369
    [<ffffffff816a1702>] do_mount fs/namespace.c:3382 [inline]
    [<ffffffff816a1702>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff816a1702>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff816a1702>] __x64_sys_mount+0x192/0x1e0 fs/namespace.c:3568
    [<ffffffff84a16749>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a16749>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80

BUG: memory leak
unreferenced object 0xffff888109b51480 (size 96):
  comm "syz-executor154", pid 5193, jiffies 4294972644 (age 19.050s)
  hex dump (first 32 bytes):
    00 60 50 00 00 00 00 00 00 10 00 00 00 00 00 00  .`P.............
    01 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00  ................
  backtrace:
    [<ffffffff81545a34>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff8213b65e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8213b65e>] kzalloc include/linux/slab.h:680 [inline]
    [<ffffffff8213b65e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271
    [<ffffffff8213bcfe>] add_tree_block+0x9e/0x220 fs/btrfs/ref-verify.c:332
    [<ffffffff8213d245>] btrfs_build_ref_tree+0x535/0x7c0 fs/btrfs/ref-verify.c:474
    [<ffffffff8202b2f1>] open_ctree+0x12d1/0x2360 fs/btrfs/disk-io.c:3710
    [<ffffffff81ff2e53>] btrfs_fill_super fs/btrfs/super.c:1156 [inline]
    [<ffffffff81ff2e53>] btrfs_mount_root+0x583/0x710 fs/btrfs/super.c:1524
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff81698e91>] fc_mount fs/namespace.c:1035 [inline]
    [<ffffffff81698e91>] vfs_kern_mount.part.0+0xd1/0x120 fs/namespace.c:1065
    [<ffffffff81698f20>] vfs_kern_mount+0x40/0x60 fs/namespace.c:1052
    [<ffffffff81ff6e8d>] btrfs_mount+0x19d/0x620 fs/btrfs/super.c:1584
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff816a0ac3>] do_new_mount fs/namespace.c:3039 [inline]
    [<ffffffff816a0ac3>] path_mount+0xc53/0x10f0 fs/namespace.c:3369
    [<ffffffff816a1702>] do_mount fs/namespace.c:3382 [inline]
    [<ffffffff816a1702>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff816a1702>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff816a1702>] __x64_sys_mount+0x192/0x1e0 fs/namespace.c:3568
    [<ffffffff84a16749>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a16749>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80

BUG: memory leak
unreferenced object 0xffff888109b51580 (size 96):
  comm "syz-executor154", pid 5193, jiffies 4294972644 (age 20.200s)
  hex dump (first 32 bytes):
    00 10 10 00 00 00 00 00 00 10 00 00 00 00 00 00  ................
    01 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00  ................
  backtrace:
    [<ffffffff81545a34>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff8213b65e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8213b65e>] kzalloc include/linux/slab.h:680 [inline]
    [<ffffffff8213b65e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271
    [<ffffffff8213bcfe>] add_tree_block+0x9e/0x220 fs/btrfs/ref-verify.c:332
    [<ffffffff8213d245>] btrfs_build_ref_tree+0x535/0x7c0 fs/btrfs/ref-verify.c:474
    [<ffffffff8202b2f1>] open_ctree+0x12d1/0x2360 fs/btrfs/disk-io.c:3710
    [<ffffffff81ff2e53>] btrfs_fill_super fs/btrfs/super.c:1156 [inline]
    [<ffffffff81ff2e53>] btrfs_mount_root+0x583/0x710 fs/btrfs/super.c:1524
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff81698e91>] fc_mount fs/namespace.c:1035 [inline]
    [<ffffffff81698e91>] vfs_kern_mount.part.0+0xd1/0x120 fs/namespace.c:1065
    [<ffffffff81698f20>] vfs_kern_mount+0x40/0x60 fs/namespace.c:1052
    [<ffffffff81ff6e8d>] btrfs_mount+0x19d/0x620 fs/btrfs/super.c:1584
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff816a0ac3>] do_new_mount fs/namespace.c:3039 [inline]
    [<ffffffff816a0ac3>] path_mount+0xc53/0x10f0 fs/namespace.c:3369
    [<ffffffff816a1702>] do_mount fs/namespace.c:3382 [inline]
    [<ffffffff816a1702>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff816a1702>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff816a1702>] __x64_sys_mount+0x192/0x1e0 fs/namespace.c:3568
    [<ffffffff84a16749>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a16749>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80

BUG: memory leak
unreferenced object 0xffff888109b51500 (size 96):
  comm "syz-executor154", pid 5193, jiffies 4294972644 (age 20.200s)
  hex dump (first 32 bytes):
    00 30 50 00 00 00 00 00 00 10 00 00 00 00 00 00  .0P.............
    01 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00  ................
  backtrace:
    [<ffffffff81545a34>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff8213b65e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8213b65e>] kzalloc include/linux/slab.h:680 [inline]
    [<ffffffff8213b65e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271
    [<ffffffff8213bcfe>] add_tree_block+0x9e/0x220 fs/btrfs/ref-verify.c:332
    [<ffffffff8213d245>] btrfs_build_ref_tree+0x535/0x7c0 fs/btrfs/ref-verify.c:474
    [<ffffffff8202b2f1>] open_ctree+0x12d1/0x2360 fs/btrfs/disk-io.c:3710
    [<ffffffff81ff2e53>] btrfs_fill_super fs/btrfs/super.c:1156 [inline]
    [<ffffffff81ff2e53>] btrfs_mount_root+0x583/0x710 fs/btrfs/super.c:1524
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff81698e91>] fc_mount fs/namespace.c:1035 [inline]
    [<ffffffff81698e91>] vfs_kern_mount.part.0+0xd1/0x120 fs/namespace.c:1065
    [<ffffffff81698f20>] vfs_kern_mount+0x40/0x60 fs/namespace.c:1052
    [<ffffffff81ff6e8d>] btrfs_mount+0x19d/0x620 fs/btrfs/super.c:1584
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff816a0ac3>] do_new_mount fs/namespace.c:3039 [inline]
    [<ffffffff816a0ac3>] path_mount+0xc53/0x10f0 fs/namespace.c:3369
    [<ffffffff816a1702>] do_mount fs/namespace.c:3382 [inline]
    [<ffffffff816a1702>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff816a1702>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff816a1702>] __x64_sys_mount+0x192/0x1e0 fs/namespace.c:3568
    [<ffffffff84a16749>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a16749>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80

BUG: memory leak
unreferenced object 0xffff888109b51480 (size 96):
  comm "syz-executor154", pid 5193, jiffies 4294972644 (age 20.200s)
  hex dump (first 32 bytes):
    00 60 50 00 00 00 00 00 00 10 00 00 00 00 00 00  .`P.............
    01 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00  ................
  backtrace:
    [<ffffffff81545a34>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff8213b65e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8213b65e>] kzalloc include/linux/slab.h:680 [inline]
    [<ffffffff8213b65e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271
    [<ffffffff8213bcfe>] add_tree_block+0x9e/0x220 fs/btrfs/ref-verify.c:332
    [<ffffffff8213d245>] btrfs_build_ref_tree+0x535/0x7c0 fs/btrfs/ref-verify.c:474
    [<ffffffff8202b2f1>] open_ctree+0x12d1/0x2360 fs/btrfs/disk-io.c:3710
    [<ffffffff81ff2e53>] btrfs_fill_super fs/btrfs/super.c:1156 [inline]
    [<ffffffff81ff2e53>] btrfs_mount_root+0x583/0x710 fs/btrfs/super.c:1524
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff81698e91>] fc_mount fs/namespace.c:1035 [inline]
    [<ffffffff81698e91>] vfs_kern_mount.part.0+0xd1/0x120 fs/namespace.c:1065
    [<ffffffff81698f20>] vfs_kern_mount+0x40/0x60 fs/namespace.c:1052
    [<ffffffff81ff6e8d>] btrfs_mount+0x19d/0x620 fs/btrfs/super.c:1584
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff816a0ac3>] do_new_mount fs/namespace.c:3039 [inline]
    [<ffffffff816a0ac3>] path_mount+0xc53/0x10f0 fs/namespace.c:3369
    [<ffffffff816a1702>] do_mount fs/namespace.c:3382 [inline]
    [<ffffffff816a1702>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff816a1702>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff816a1702>] __x64_sys_mount+0x192/0x1e0 fs/namespace.c:3568
    [<ffffffff84a16749>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a16749>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80

BUG: memory leak
unreferenced object 0xffff888109b51580 (size 96):
  comm "syz-executor154", pid 5193, jiffies 4294972644 (age 22.400s)
  hex dump (first 32 bytes):
    00 10 10 00 00 00 00 00 00 10 00 00 00 00 00 00  ................
    01 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00  ................
  backtrace:
    [<ffffffff81545a34>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff8213b65e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8213b65e>] kzalloc include/linux/slab.h:680 [inline]
    [<ffffffff8213b65e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271
    [<ffffffff8213bcfe>] add_tree_block+0x9e/0x220 fs/btrfs/ref-verify.c:332
    [<ffffffff8213d245>] btrfs_build_ref_tree+0x535/0x7c0 fs/btrfs/ref-verify.c:474
    [<ffffffff8202b2f1>] open_ctree+0x12d1/0x2360 fs/btrfs/disk-io.c:3710
    [<ffffffff81ff2e53>] btrfs_fill_super fs/btrfs/super.c:1156 [inline]
    [<ffffffff81ff2e53>] btrfs_mount_root+0x583/0x710 fs/btrfs/super.c:1524
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff81698e91>] fc_mount fs/namespace.c:1035 [inline]
    [<ffffffff81698e91>] vfs_kern_mount.part.0+0xd1/0x120 fs/namespace.c:1065
    [<ffffffff81698f20>] vfs_kern_mount+0x40/0x60 fs/namespace.c:1052
    [<ffffffff81ff6e8d>] btrfs_mount+0x19d/0x620 fs/btrfs/super.c:1584
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff816a0ac3>] do_new_mount fs/namespace.c:3039 [inline]
    [<ffffffff816a0ac3>] path_mount+0xc53/0x10f0 fs/namespace.c:3369
    [<ffffffff816a1702>] do_mount fs/namespace.c:3382 [inline]
    [<ffffffff816a1702>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff816a1702>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff816a1702>] __x64_sys_mount+0x192/0x1e0 fs/namespace.c:3568
    [<ffffffff84a16749>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a16749>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80

BUG: memory leak
unreferenced object 0xffff888109b51500 (size 96):
  comm "syz-executor154", pid 5193, jiffies 4294972644 (age 22.400s)
  hex dump (first 32 bytes):
    00 30 50 00 00 00 00 00 00 10 00 00 00 00 00 00  .0P.............
    01 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00  ................
  backtrace:
    [<ffffffff81545a34>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff8213b65e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8213b65e>] kzalloc include/linux/slab.h:680 [inline]
    [<ffffffff8213b65e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271
    [<ffffffff8213bcfe>] add_tree_block+0x9e/0x220 fs/btrfs/ref-verify.c:332
    [<ffffffff8213d245>] btrfs_build_ref_tree+0x535/0x7c0 fs/btrfs/ref-verify.c:474
    [<ffffffff8202b2f1>] open_ctree+0x12d1/0x2360 fs/btrfs/disk-io.c:3710
    [<ffffffff81ff2e53>] btrfs_fill_super fs/btrfs/super.c:1156 [inline]
    [<ffffffff81ff2e53>] btrfs_mount_root+0x583/0x710 fs/btrfs/super.c:1524
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff81698e91>] fc_mount fs/namespace.c:1035 [inline]
    [<ffffffff81698e91>] vfs_kern_mount.part.0+0xd1/0x120 fs/namespace.c:1065
    [<ffffffff81698f20>] vfs_kern_mount+0x40/0x60 fs/namespace.c:1052
    [<ffffffff81ff6e8d>] btrfs_mount+0x19d/0x620 fs/btrfs/super.c:1584
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff816a0ac3>] do_new_mount fs/namespace.c:3039 [inline]
    [<ffffffff816a0ac3>] path_mount+0xc53/0x10f0 fs/namespace.c:3369
    [<ffffffff816a1702>] do_mount fs/namespace.c:3382 [inline]
    [<ffffffff816a1702>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff816a1702>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff816a1702>] __x64_sys_mount+0x192/0x1e0 fs/namespace.c:3568
    [<ffffffff84a16749>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a16749>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80

BUG: memory leak
unreferenced object 0xffff888109b51480 (size 96):
  comm "syz-executor154", pid 5193, jiffies 4294972644 (age 22.400s)
  hex dump (first 32 bytes):
    00 60 50 00 00 00 00 00 00 10 00 00 00 00 00 00  .`P.............
    01 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00  ................
  backtrace:
    [<ffffffff81545a34>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff8213b65e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8213b65e>] kzalloc include/linux/slab.h:680 [inline]
    [<ffffffff8213b65e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271
    [<ffffffff8213bcfe>] add_tree_block+0x9e/0x220 fs/btrfs/ref-verify.c:332
    [<ffffffff8213d245>] btrfs_build_ref_tree+0x535/0x7c0 fs/btrfs/ref-verify.c:474
    [<ffffffff8202b2f1>] open_ctree+0x12d1/0x2360 fs/btrfs/disk-io.c:3710
    [<ffffffff81ff2e53>] btrfs_fill_super fs/btrfs/super.c:1156 [inline]
    [<ffffffff81ff2e53>] btrfs_mount_root+0x583/0x710 fs/btrfs/super.c:1524
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff81698e91>] fc_mount fs/namespace.c:1035 [inline]
    [<ffffffff81698e91>] vfs_kern_mount.part.0+0xd1/0x120 fs/namespace.c:1065
    [<ffffffff81698f20>] vfs_kern_mount+0x40/0x60 fs/namespace.c:1052
    [<ffffffff81ff6e8d>] btrfs_mount+0x19d/0x620 fs/btrfs/super.c:1584
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff816a0ac3>] do_new_mount fs/namespace.c:3039 [inline]
    [<ffffffff816a0ac3>] path_mount+0xc53/0x10f0 fs/namespace.c:3369
    [<ffffffff816a1702>] do_mount fs/namespace.c:3382 [inline]
    [<ffffffff816a1702>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff816a1702>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff816a1702>] __x64_sys_mount+0x192/0x1e0 fs/namespace.c:3568
    [<ffffffff84a16749>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a16749>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80

BUG: memory leak
unreferenced object 0xffff888109b51580 (size 96):
  comm "syz-executor154", pid 5193, jiffies 4294972644 (age 22.440s)
  hex dump (first 32 bytes):
    00 10 10 00 00 00 00 00 00 10 00 00 00 00 00 00  ................
    01 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00  ................
  backtrace:
    [<ffffffff81545a34>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff8213b65e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8213b65e>] kzalloc include/linux/slab.h:680 [inline]
    [<ffffffff8213b65e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271
    [<ffffffff8213bcfe>] add_tree_block+0x9e/0x220 fs/btrfs/ref-verify.c:332
    [<ffffffff8213d245>] btrfs_build_ref_tree+0x535/0x7c0 fs/btrfs/ref-verify.c:474
    [<ffffffff8202b2f1>] open_ctree+0x12d1/0x2360 fs/btrfs/disk-io.c:3710
    [<ffffffff81ff2e53>] btrfs_fill_super fs/btrfs/super.c:1156 [inline]
    [<ffffffff81ff2e53>] btrfs_mount_root+0x583/0x710 fs/btrfs/super.c:1524
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff81698e91>] fc_mount fs/namespace.c:1035 [inline]
    [<ffffffff81698e91>] vfs_kern_mount.part.0+0xd1/0x120 fs/namespace.c:1065
    [<ffffffff81698f20>] vfs_kern_mount+0x40/0x60 fs/namespace.c:1052
    [<ffffffff81ff6e8d>] btrfs_mount+0x19d/0x620 fs/btrfs/super.c:1584
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff816a0ac3>] do_new_mount fs/namespace.c:3039 [inline]
    [<ffffffff816a0ac3>] path_mount+0xc53/0x10f0 fs/namespace.c:3369
    [<ffffffff816a1702>] do_mount fs/namespace.c:3382 [inline]
    [<ffffffff816a1702>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff816a1702>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff816a1702>] __x64_sys_mount+0x192/0x1e0 fs/namespace.c:3568
    [<ffffffff84a16749>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a16749>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80

BUG: memory leak
unreferenced object 0xffff888109b51500 (size 96):
  comm "syz-executor154", pid 5193, jiffies 4294972644 (age 22.440s)
  hex dump (first 32 bytes):
    00 30 50 00 00 00 00 00 00 10 00 00 00 00 00 00  .0P.............
    01 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00  ................
  backtrace:
    [<ffffffff81545a34>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff8213b65e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8213b65e>] kzalloc include/linux/slab.h:680 [inline]
    [<ffffffff8213b65e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271
    [<ffffffff8213bcfe>] add_tree_block+0x9e/0x220 fs/btrfs/ref-verify.c:332
    [<ffffffff8213d245>] btrfs_build_ref_tree+0x535/0x7c0 fs/btrfs/ref-verify.c:474
    [<ffffffff8202b2f1>] open_ctree+0x12d1/0x2360 fs/btrfs/disk-io.c:3710
    [<ffffffff81ff2e53>] btrfs_fill_super fs/btrfs/super.c:1156 [inline]
    [<ffffffff81ff2e53>] btrfs_mount_root+0x583/0x710 fs/btrfs/super.c:1524
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff81698e91>] fc_mount fs/namespace.c:1035 [inline]
    [<ffffffff81698e91>] vfs_kern_mount.part.0+0xd1/0x120 fs/namespace.c:1065
    [<ffffffff81698f20>] vfs_kern_mount+0x40/0x60 fs/namespace.c:1052
    [<ffffffff81ff6e8d>] btrfs_mount+0x19d/0x620 fs/btrfs/super.c:1584
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff816a0ac3>] do_new_mount fs/namespace.c:3039 [inline]
    [<ffffffff816a0ac3>] path_mount+0xc53/0x10f0 fs/namespace.c:3369
    [<ffffffff816a1702>] do_mount fs/namespace.c:3382 [inline]
    [<ffffffff816a1702>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff816a1702>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff816a1702>] __x64_sys_mount+0x192/0x1e0 fs/namespace.c:3568
    [<ffffffff84a16749>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a16749>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80

BUG: memory leak
unreferenced object 0xffff888109b51480 (size 96):
  comm "syz-executor154", pid 5193, jiffies 4294972644 (age 22.440s)
  hex dump (first 32 bytes):
    00 60 50 00 00 00 00 00 00 10 00 00 00 00 00 00  .`P.............
    01 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00  ................
  backtrace:
    [<ffffffff81545a34>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff8213b65e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8213b65e>] kzalloc include/linux/slab.h:680 [inline]
    [<ffffffff8213b65e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271
    [<ffffffff8213bcfe>] add_tree_block+0x9e/0x220 fs/btrfs/ref-verify.c:332
    [<ffffffff8213d245>] btrfs_build_ref_tree+0x535/0x7c0 fs/btrfs/ref-verify.c:474
    [<ffffffff8202b2f1>] open_ctree+0x12d1/0x2360 fs/btrfs/disk-io.c:3710
    [<ffffffff81ff2e53>] btrfs_fill_super fs/btrfs/super.c:1156 [inline]
    [<ffffffff81ff2e53>] btrfs_mount_root+0x583/0x710 fs/btrfs/super.c:1524
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff81698e91>] fc_mount fs/namespace.c:1035 [inline]
    [<ffffffff81698e91>] vfs_kern_mount.part.0+0xd1/0x120 fs/namespace.c:1065
    [<ffffffff81698f20>] vfs_kern_mount+0x40/0x60 fs/namespace.c:1052
    [<ffffffff81ff6e8d>] btrfs_mount+0x19d/0x620 fs/btrfs/super.c:1584
    [<ffffffff816c406f>] legacy_get_tree+0x2f/0x90 fs/fs_context.c:610
    [<ffffffff8165d7ac>] vfs_get_tree+0x2c/0x110 fs/super.c:1510
    [<ffffffff816a0ac3>] do_new_mount fs/namespace.c:3039 [inline]
    [<ffffffff816a0ac3>] path_mount+0xc53/0x10f0 fs/namespace.c:3369
    [<ffffffff816a1702>] do_mount fs/namespace.c:3382 [inline]
    [<ffffffff816a1702>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff816a1702>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff816a1702>] __x64_sys_mount+0x192/0x1e0 fs/namespace.c:3568
    [<ffffffff84a16749>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a16749>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80

executing program
executing program
executing program


---
This report is generated by a bot. It may contain errors.
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syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report

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#syz undup



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