[Bugme-new] [Bug 19522] New: kmemcheck reports reads from unitialized memory in alloc_inode etc.

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Sat Oct 2 04:06:28 PDT 2010


https://bugzilla.kernel.org/show_bug.cgi?id=19522

           Summary: kmemcheck reports reads from unitialized memory in
                    alloc_inode etc.
           Product: File System
           Version: 2.5
    Kernel Version: 2.6.35.6 (+ tuxonice patches)
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: btrfs
        AssignedTo: fs_btrfs at kernel-bugs.osdl.org
        ReportedBy: sliedes at cc.hut.fi
        Regression: No


I tested btrfs under kmemcheck, and kmemcheck reports reads from unitialized
memory on basically all operations on a freshly created btrfs filesystem (of
course it's not unlikely it's the same uninitialized variable all over).

Here are the first backtraces:


device fsid 7f482de1f5b1f190-23f339b9880797be devid 1 transid 7 /dev/loop0
WARNING: kmemcheck: Caught 64-bit read from uninitialized memory
(ffff880100210250)
14001400423f0500d23f0101ef3f01016904ebff7804ebff3c3e0200ef3f0101
 u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u
                                 ^

Pid: 5892, comm: mount Tainted: G          I 2.6.35.6-tuxonice-debug #2 Aspire
5810T/Aspire 5810T
RIP: 0010:[<ffffffff81229ed8>]  [<ffffffff81229ed8>]
btrfs_alloc_inode+0x168/0x1e0
RSP: 0018:ffff88010cb33b88  EFLAGS: 00010246
RAX: ffff880100210220 RBX: ffff880100210000 RCX: 0000000000000000
RDX: ffffffff824b7948 RSI: ffffffff8178d722 RDI: ffffffff824b7948
RBP: ffff88010cb33ba8 R08: 0000000000000008 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff880100210310
R13: ffff8801002104f0 R14: ffff880100203000 R15: ffff880100207000
FS:  00007f8183f9a7e0(0000) GS:ffff880002800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8801002073f0 CR3: 0000000109584000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
 [<ffffffff811438c2>] alloc_inode+0x22/0xa0
 [<ffffffff81143cc8>] new_inode+0x28/0xc0
 [<ffffffff81225934>] open_ctree+0x244/0x17a0
 [<ffffffff81207d4f>] btrfs_get_sb+0x30f/0x410
 [<ffffffff8112cb65>] vfs_kern_mount+0x65/0x150
 [<ffffffff8112ccbd>] do_kern_mount+0x4d/0x130
 [<ffffffff81148d76>] do_mount+0x2c6/0x880
 [<ffffffff811493bb>] sys_mount+0x8b/0xe0
 [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b
 [<ffffffffffffffff>] 0xffffffffffffffff
WARNING: kmemcheck: Caught 8-bit read from uninitialized memory
(ffff880116d8d4e0)
0000000000000000010000000000000000647c270188ffff0000400200000000
 u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u
 ^

Pid: 4160, comm: gvfs-gdu-volume Tainted: G          I 2.6.35.6-tuxonice-debug
#2 Aspire 5810T/Aspire 5810T
RIP: 0010:[<ffffffff81217922>]  [<ffffffff81217922>]
btrfs_alloc_free_block+0x232/0x330
RSP: 0018:ffff88012aaddb18  EFLAGS: 00010202
RAX: 0000000000000011 RBX: ffff880116d8d4c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88012aaddc19 RDI: ffff880116d8d4d1
RBP: ffff88012aaddba8 R08: 0000000000000000 R09: ffff880116c604c0
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88010e72d700
R13: 0000000000000000 R14: ffff88010ac28000 R15: 0000000000000040
FS:  00007f2d82ae37a0(0000) GS:ffff880002800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88010ac28030 CR3: 0000000130507000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
 [<ffffffff8120cf36>] __btrfs_cow_block+0x136/0x5b0
 [<ffffffff8120daa1>] btrfs_cow_block+0xf1/0x1d0
 [<ffffffff81210156>] btrfs_search_slot+0x1b6/0x820
 [<ffffffff81221c1a>] btrfs_lookup_inode+0x2a/0xa0
 [<ffffffff8122cf29>] btrfs_update_inode+0x59/0x100
 [<ffffffff8122ed56>] btrfs_dirty_inode+0x66/0x120
 [<ffffffff8114e276>] __mark_inode_dirty+0x36/0x170
 [<ffffffff811420dd>] touch_atime+0x12d/0x180
 [<ffffffff8113c3ee>] vfs_readdir+0xbe/0xd0
 [<ffffffff8113c564>] sys_getdents+0x84/0xf0
 [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b
 [<ffffffffffffffff>] 0xffffffffffffffff
WARNING: kmemcheck: Caught 8-bit read from uninitialized memory
(ffff88013c101cc8)
c0d4d8160188ffffffffffff92000000c00000000188ffff00987e270188ffff
 i i i i i i i i u u u u u u u u u u u u u u u u u u u u u u u u
                 ^

Pid: 4160, comm: gvfs-gdu-volume Tainted: G          I 2.6.35.6-tuxonice-debug
#2 Aspire 5810T/Aspire 5810T
RIP: 0010:[<ffffffff81262bbd>]  [<ffffffff81262bbd>]
add_delayed_ref_head+0x5d/0x120
RSP: 0018:ffff88012aadda68  EFLAGS: 00010206
RAX: 0000000000000001 RBX: ffff88013c101c00 RCX: 0000000000001000
RDX: 0000000001c06000 RSI: 0000000000000001 RDI: ffff88010ac28000
RBP: ffff88012aadda88 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffff88010ac28000
R13: ffff880116cd2000 R14: 0000000000001000 R15: 0000000001c06000
FS:  00007f2d82ae37a0(0000) GS:ffff880002800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88010ac28030 CR3: 0000000130507000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
 [<ffffffff81262e6f>] btrfs_add_delayed_tree_ref+0xdf/0x230
 [<ffffffff81217957>] btrfs_alloc_free_block+0x267/0x330
 [<ffffffff8120cf36>] __btrfs_cow_block+0x136/0x5b0
 [<ffffffff8120daa1>] btrfs_cow_block+0xf1/0x1d0
 [<ffffffff81210156>] btrfs_search_slot+0x1b6/0x820
 [<ffffffff81221c1a>] btrfs_lookup_inode+0x2a/0xa0
 [<ffffffff8122cf29>] btrfs_update_inode+0x59/0x100
 [<ffffffff8122ed56>] btrfs_dirty_inode+0x66/0x120
 [<ffffffff8114e276>] __mark_inode_dirty+0x36/0x170
 [<ffffffff811420dd>] touch_atime+0x12d/0x180
 [<ffffffff8113c3ee>] vfs_readdir+0xbe/0xd0
 [<ffffffff8113c564>] sys_getdents+0x84/0xf0
 [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b
 [<ffffffffffffffff>] 0xffffffffffffffff
WARNING: kmemcheck: Caught 8-bit read from uninitialized memory
(ffff88012762bbd2)
8804c581ffffffff010000000000000001507781ffffffff0000000000000000
 u u u u u u u u i i i i u u u u i u u u u u u u u u u u u u u u
                                     ^

Pid: 4160, comm: gvfs-gdu-volume Tainted: G          I 2.6.35.6-tuxonice-debug
#2 Aspire 5810T/Aspire 5810T
RIP: 0010:[<ffffffff8126297d>]  [<ffffffff8126297d>]
add_delayed_tree_ref+0x3d/0xe0
RSP: 0018:ffff88012aadda68  EFLAGS: 00010246
RAX: 0000000000000001 RBX: ffff88012762bba0 RCX: 0000000000001000
RDX: 0000000001c06000 RSI: 0000000000000003 RDI: ffff88010ac28000
RBP: ffff88012aadda88 R08: 0000000000000000 R09: 0000000000000005
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88010ac28000
R13: ffff88012762bba0 R14: ffff880116cd2000 R15: 0000000001c06000
FS:  00007f2d82ae37a0(0000) GS:ffff880002800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88010ac28030 CR3: 0000000130507000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
 [<ffffffff81262e9d>] btrfs_add_delayed_tree_ref+0x10d/0x230
 [<ffffffff81217957>] btrfs_alloc_free_block+0x267/0x330
 [<ffffffff8120cf36>] __btrfs_cow_block+0x136/0x5b0
 [<ffffffff8120daa1>] btrfs_cow_block+0xf1/0x1d0
 [<ffffffff81210156>] btrfs_search_slot+0x1b6/0x820
 [<ffffffff81221c1a>] btrfs_lookup_inode+0x2a/0xa0
 [<ffffffff8122cf29>] btrfs_update_inode+0x59/0x100
 [<ffffffff8122ed56>] btrfs_dirty_inode+0x66/0x120
 [<ffffffff8114e276>] __mark_inode_dirty+0x36/0x170
 [<ffffffff811420dd>] touch_atime+0x12d/0x180
 [<ffffffff8113c3ee>] vfs_readdir+0xbe/0xd0
 [<ffffffff8113c564>] sys_getdents+0x84/0xf0
 [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b
 [<ffffffffffffffff>] 0xffffffffffffffff
WARNING: kmemcheck: Caught 8-bit read from uninitialized memory
(ffff88013c101bc8)
00000000000000000004b53c0188ffff70486b3d0188ffff1700000000000000
 i i i i i i i i u u u u u u u u u u u u u u u u u u u u u u u u
                 ^

Pid: 4160, comm: gvfs-gdu-volume Tainted: G          I 2.6.35.6-tuxonice-debug
#2 Aspire 5810T/Aspire 5810T
RIP: 0010:[<ffffffff81262bbd>]  [<ffffffff81262bbd>]
add_delayed_ref_head+0x5d/0x120
RSP: 0018:ffff88012aaddab8  EFLAGS: 00010206
RAX: 00000000ffffffff RBX: ffff88013c101b00 RCX: 0000000000001000
RDX: 0000000001c00000 RSI: 0000000000000000 RDI: ffff88010ac28000
RBP: ffff88012aaddad8 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffff88010ac28000
R13: ffff880116cd2000 R14: 0000000000001000 R15: 0000000001c00000
FS:  00007f2d82ae37a0(0000) GS:ffff880002800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88010ac28030 CR3: 0000000130507000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
 [<ffffffff81262e6f>] btrfs_add_delayed_tree_ref+0xdf/0x230
 [<ffffffff81217cbb>] btrfs_free_tree_block+0x9b/0x350
 [<ffffffff8120d2b6>] __btrfs_cow_block+0x4b6/0x5b0
 [<ffffffff8120daa1>] btrfs_cow_block+0xf1/0x1d0
 [<ffffffff81210156>] btrfs_search_slot+0x1b6/0x820
 [<ffffffff81221c1a>] btrfs_lookup_inode+0x2a/0xa0
 [<ffffffff8122cf29>] btrfs_update_inode+0x59/0x100
 [<ffffffff8122ed56>] btrfs_dirty_inode+0x66/0x120
 [<ffffffff8114e276>] __mark_inode_dirty+0x36/0x170
 [<ffffffff811420dd>] touch_atime+0x12d/0x180
 [<ffffffff8113c3ee>] vfs_readdir+0xbe/0xd0
 [<ffffffff8113c564>] sys_getdents+0x84/0xf0
 [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b
 [<ffffffffffffffff>] 0xffffffffffffffff
WARNING: kmemcheck: Caught 8-bit read from uninitialized memory
(ffff88012762bc92)
e85f4b82ffffffff010000000000000002007b81ffffffff98bc62270188ffff
 u u u u u u u u i i i i u u u u i u u u u u u u u u u u u u u u
                                     ^

Pid: 4160, comm: gvfs-gdu-volume Tainted: G          I 2.6.35.6-tuxonice-debug
#2 Aspire 5810T/Aspire 5810T
RIP: 0010:[<ffffffff8126297d>]  [<ffffffff8126297d>]
add_delayed_tree_ref+0x3d/0xe0
RSP: 0018:ffff88012aaddab8  EFLAGS: 00010297
RAX: 0000000000000002 RBX: ffff88012762bc60 RCX: 0000000000001000
RDX: 0000000001c00000 RSI: 0000000000000002 RDI: ffff88010ac28000
RBP: ffff88012aaddad8 R08: 0000000000000000 R09: 0000000000000005
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88010ac28000
R13: ffff88012762bc60 R14: ffff880116cd2000 R15: 0000000001c00000
FS:  00007f2d82ae37a0(0000) GS:ffff880002800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88013e110200 CR3: 0000000130507000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
 [<ffffffff81262e9d>] btrfs_add_delayed_tree_ref+0x10d/0x230
 [<ffffffff81217cbb>] btrfs_free_tree_block+0x9b/0x350
 [<ffffffff8120d2b6>] __btrfs_cow_block+0x4b6/0x5b0
 [<ffffffff8120daa1>] btrfs_cow_block+0xf1/0x1d0
 [<ffffffff81210156>] btrfs_search_slot+0x1b6/0x820
 [<ffffffff81221c1a>] btrfs_lookup_inode+0x2a/0xa0
 [<ffffffff8122cf29>] btrfs_update_inode+0x59/0x100
 [<ffffffff8122ed56>] btrfs_dirty_inode+0x66/0x120
 [<ffffffff8114e276>] __mark_inode_dirty+0x36/0x170
 [<ffffffff811420dd>] touch_atime+0x12d/0x180
 [<ffffffff8113c3ee>] vfs_readdir+0xbe/0xd0
 [<ffffffff8113c564>] sys_getdents+0x84/0xf0
 [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b
 [<ffffffffffffffff>] 0xffffffffffffffff
WARNING: kmemcheck: Caught 8-bit read from uninitialized memory
(ffff880116d8d7a0)
a0e2cb3f0188ffffa0e5ce3f0188ffff00030000000000000000000000000000
 u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u
 ^

Pid: 5907, comm: btrfs-transacti Tainted: G          I 2.6.35.6-tuxonice-debug
#2 Aspire 5810T/Aspire 5810T
RIP: 0010:[<ffffffff81217922>]  [<ffffffff81217922>]
btrfs_alloc_free_block+0x232/0x330
RSP: 0018:ffff8801169eb7e0  EFLAGS: 00010202
RAX: 0000000000000011 RBX: ffff880116d8d780 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8801169eb8e1 RDI: ffff880116d8d791
RBP: ffff8801169eb870 R08: 0000000000000000 R09: ffff880116c60780
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88010e72d7e0
R13: 0000000000000000 R14: ffff88010ac28000 R15: 0000000000000040
FS:  0000000000000000(0000) GS:ffff880002800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88012f3d9531 CR3: 000000013c938000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
 [<ffffffff8120cf36>] __btrfs_cow_block+0x136/0x5b0
 [<ffffffff8120daa1>] btrfs_cow_block+0xf1/0x1d0
 [<ffffffff81210156>] btrfs_search_slot+0x1b6/0x820
 [<ffffffff8121b4f7>] lookup_inline_extent_backref+0xb7/0x3f0
 [<ffffffff8121c911>] __btrfs_free_extent+0xd1/0x720
 [<ffffffff8121d726>] run_clustered_refs+0x506/0x830
 [<ffffffff8121db10>] btrfs_run_delayed_refs+0xc0/0x240
 [<ffffffff81228ab9>] btrfs_commit_transaction+0x79/0x6f0
 [<ffffffff81223b63>] transaction_kthread+0x2f3/0x300
 [<ffffffff8106be5e>] kthread+0x8e/0xa0
 [<ffffffff81003bd4>] kernel_thread_helper+0x4/0x10
 [<ffffffffffffffff>] 0xffffffffffffffff
WARNING: kmemcheck: Caught 8-bit read from uninitialized memory
(ffff88012f3d95c8)
80d7d8160188ffffffffffff92000000c00000000000000000887e270188ffff
 i i i i i i i i u u u u u u u u u u u u u u u u u u u u u u u u
                 ^

Pid: 5907, comm: btrfs-transacti Tainted: G          I 2.6.35.6-tuxonice-debug
#2 Aspire 5810T/Aspire 5810T
RIP: 0010:[<ffffffff81262bbd>]  [<ffffffff81262bbd>]
add_delayed_ref_head+0x5d/0x120
RSP: 0018:ffff8801169eb730  EFLAGS: 00010206
RAX: 0000000000000001 RBX: ffff88012f3d9500 RCX: 0000000000001000
RDX: 0000000001c07000 RSI: 0000000000000001 RDI: ffff88010ac28000
RBP: ffff8801169eb750 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffff88010ac28000
R13: ffff880116cd2000 R14: 0000000000001000 R15: 0000000001c07000
FS:  0000000000000000(0000) GS:ffff880002800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88012f3d9531 CR3: 000000013c938000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
 [<ffffffff81262e6f>] btrfs_add_delayed_tree_ref+0xdf/0x230
 [<ffffffff81217957>] btrfs_alloc_free_block+0x267/0x330
 [<ffffffff8120cf36>] __btrfs_cow_block+0x136/0x5b0
 [<ffffffff8120daa1>] btrfs_cow_block+0xf1/0x1d0
 [<ffffffff81210156>] btrfs_search_slot+0x1b6/0x820
 [<ffffffff8121b4f7>] lookup_inline_extent_backref+0xb7/0x3f0
 [<ffffffff8121c911>] __btrfs_free_extent+0xd1/0x720
 [<ffffffff8121d726>] run_clustered_refs+0x506/0x830
 [<ffffffff8121db10>] btrfs_run_delayed_refs+0xc0/0x240
 [<ffffffff81228ab9>] btrfs_commit_transaction+0x79/0x6f0
 [<ffffffff81223b63>] transaction_kthread+0x2f3/0x300
 [<ffffffff8106be5e>] kthread+0x8e/0xa0
 [<ffffffff81003bd4>] kernel_thread_helper+0x4/0x10
 [<ffffffffffffffff>] 0xffffffffffffffff
WARNING: kmemcheck: Caught 8-bit read from uninitialized memory
(ffff88011fc33e72)
0000000000000000010000000000000001000000000000000000000000000000
 u u u u u u u u i i i i u u u u i u u u u u u u u u u u u u u u
                                     ^

Pid: 5907, comm: btrfs-transacti Tainted: G          I 2.6.35.6-tuxonice-debug
#2 Aspire 5810T/Aspire 5810T
RIP: 0010:[<ffffffff8126297d>]  [<ffffffff8126297d>]
add_delayed_tree_ref+0x3d/0xe0
RSP: 0018:ffff8801169eb730  EFLAGS: 00010246
RAX: 0000000000000001 RBX: ffff88011fc33e40 RCX: 0000000000001000
RDX: 0000000001c07000 RSI: 0000000000000003 RDI: ffff88010ac28000
RBP: ffff8801169eb750 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88010ac28000
R13: ffff88011fc33e40 R14: ffff880116cd2000 R15: 0000000001c07000
FS:  0000000000000000(0000) GS:ffff880002800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88011fc33988 CR3: 000000013c938000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
 [<ffffffff81262e9d>] btrfs_add_delayed_tree_ref+0x10d/0x230
 [<ffffffff81217957>] btrfs_alloc_free_block+0x267/0x330
 [<ffffffff8120cf36>] __btrfs_cow_block+0x136/0x5b0
 [<ffffffff8120daa1>] btrfs_cow_block+0xf1/0x1d0
 [<ffffffff81210156>] btrfs_search_slot+0x1b6/0x820
 [<ffffffff8121b4f7>] lookup_inline_extent_backref+0xb7/0x3f0
 [<ffffffff8121c911>] __btrfs_free_extent+0xd1/0x720
 [<ffffffff8121d726>] run_clustered_refs+0x506/0x830
 [<ffffffff8121db10>] btrfs_run_delayed_refs+0xc0/0x240
 [<ffffffff81228ab9>] btrfs_commit_transaction+0x79/0x6f0
 [<ffffffff81223b63>] transaction_kthread+0x2f3/0x300
 [<ffffffff8106be5e>] kthread+0x8e/0xa0
 [<ffffffff81003bd4>] kernel_thread_helper+0x4/0x10
 [<ffffffffffffffff>] 0xffffffffffffffff
WARNING: kmemcheck: Caught 8-bit read from uninitialized memory
(ffff88012f3d9fc8)
0000000000000000520000007c000000c00000000000000000987e270188ffff
 i i i i i i i i u u u u u u u u u u u u u u u u u u u u u u u u
                 ^

Pid: 5907, comm: btrfs-transacti Tainted: G          I 2.6.35.6-tuxonice-debug
#2 Aspire 5810T/Aspire 5810T
RIP: 0010:[<ffffffff81262bbd>]  [<ffffffff81262bbd>]
add_delayed_ref_head+0x5d/0x120
RSP: 0018:ffff8801169eb780  EFLAGS: 00010286
RAX: 00000000ffffffff RBX: ffff88012f3d9f00 RCX: 0000000000001000
RDX: 0000000001c02000 RSI: 0000000000000000 RDI: ffff88010ac28000
RBP: ffff8801169eb7a0 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffff88010ac28000
R13: ffff880116cd2000 R14: 0000000000001000 R15: 0000000001c02000
FS:  0000000000000000(0000) GS:ffff880002800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88011fc33988 CR3: 000000013c938000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
 [<ffffffff81262e6f>] btrfs_add_delayed_tree_ref+0xdf/0x230
 [<ffffffff81217cbb>] btrfs_free_tree_block+0x9b/0x350
 [<ffffffff8120d2b6>] __btrfs_cow_block+0x4b6/0x5b0
 [<ffffffff8120daa1>] btrfs_cow_block+0xf1/0x1d0
 [<ffffffff81210156>] btrfs_search_slot+0x1b6/0x820
 [<ffffffff8121b4f7>] lookup_inline_extent_backref+0xb7/0x3f0
 [<ffffffff8121c911>] __btrfs_free_extent+0xd1/0x720
 [<ffffffff8121d726>] run_clustered_refs+0x506/0x830
 [<ffffffff8121db10>] btrfs_run_delayed_refs+0xc0/0x240
 [<ffffffff81228ab9>] btrfs_commit_transaction+0x79/0x6f0
 [<ffffffff81223b63>] transaction_kthread+0x2f3/0x300
 [<ffffffff8106be5e>] kthread+0x8e/0xa0
 [<ffffffff81003bd4>] kernel_thread_helper+0x4/0x10
 [<ffffffffffffffff>] 0xffffffffffffffff
WARNING: kmemcheck: Caught 8-bit read from uninitialized memory
(ffff88011fc33992)
0000000000000000010000000000000002000000000000000000000000000000
 u u u u u u u u i i i i u u u u i u u u u u u u u u u u u u u u
                                     ^

Pid: 5907, comm: btrfs-transacti Tainted: G          I 2.6.35.6-tuxonice-debug
#2 Aspire 5810T/Aspire 5810T
RIP: 0010:[<ffffffff8126297d>]  [<ffffffff8126297d>]
add_delayed_tree_ref+0x3d/0xe0
RSP: 0018:ffff8801169eb780  EFLAGS: 00010297
RAX: 0000000000000002 RBX: ffff88011fc33960 RCX: 0000000000001000
RDX: 0000000001c02000 RSI: 0000000000000002 RDI: ffff88010ac28000
RBP: ffff8801169eb7a0 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88010ac28000
R13: ffff88011fc33960 R14: ffff880116cd2000 R15: 0000000001c02000
FS:  0000000000000000(0000) GS:ffff880002800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88013bda0090 CR3: 000000013c938000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
 [<ffffffff81262e9d>] btrfs_add_delayed_tree_ref+0x10d/0x230
 [<ffffffff81217cbb>] btrfs_free_tree_block+0x9b/0x350
 [<ffffffff8120d2b6>] __btrfs_cow_block+0x4b6/0x5b0
 [<ffffffff8120daa1>] btrfs_cow_block+0xf1/0x1d0
 [<ffffffff81210156>] btrfs_search_slot+0x1b6/0x820
 [<ffffffff8121b4f7>] lookup_inline_extent_backref+0xb7/0x3f0
 [<ffffffff8121c911>] __btrfs_free_extent+0xd1/0x720
 [<ffffffff8121d726>] run_clustered_refs+0x506/0x830
 [<ffffffff8121db10>] btrfs_run_delayed_refs+0xc0/0x240
 [<ffffffff81228ab9>] btrfs_commit_transaction+0x79/0x6f0
 [<ffffffff81223b63>] transaction_kthread+0x2f3/0x300
 [<ffffffff8106be5e>] kthread+0x8e/0xa0
 [<ffffffff81003bd4>] kernel_thread_helper+0x4/0x10
 [<ffffffffffffffff>] 0xffffffffffffffff
WARNING: kmemcheck: Caught 8-bit read from uninitialized memory
(ffff880116d8d7a0)
a3e2cb3f0188ffffa0e5ce3f0188ffff00030000000000000000000000000000
 u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u u
 ^

Pid: 5907, comm: btrfs-transacti Tainted: G          I 2.6.35.6-tuxonice-debug
#2 Aspire 5810T/Aspire 5810T
RIP: 0010:[<ffffffff81217922>]  [<ffffffff81217922>]
btrfs_alloc_free_block+0x232/0x330
RSP: 0018:ffff8801169eba10  EFLAGS: 00010202
RAX: 0000000000000011 RBX: ffff880116d8d780 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8801169ebb11 RDI: ffff880116d8d791
RBP: ffff8801169ebaa0 R08: 0000000000000000 R09: ffff880116c60780
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88010e72d8c0
R13: 0000000000000000 R14: ffff88010ac28000 R15: 0000000000000040
FS:  0000000000000000(0000) GS:ffff880002800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88011fc33e48 CR3: 000000013cb9a000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
 [<ffffffff8120cf36>] __btrfs_cow_block+0x136/0x5b0
 [<ffffffff8120daa1>] btrfs_cow_block+0xf1/0x1d0
 [<ffffffff81210156>] btrfs_search_slot+0x1b6/0x820
 [<ffffffff8121f53f>] btrfs_update_root+0x4f/0xe0
 [<ffffffff81228043>] commit_fs_roots+0x113/0x160
 [<ffffffff81228d2a>] btrfs_commit_transaction+0x2ea/0x6f0
 [<ffffffff81223b63>] transaction_kthread+0x2f3/0x300
 [<ffffffff8106be5e>] kthread+0x8e/0xa0
 [<ffffffff81003bd4>] kernel_thread_helper+0x4/0x10
 [<ffffffffffffffff>] 0xffffffffffffffff

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