Memory leak on acpi_add_single_object()

From: Luis R. Rodriguez
Date: Fri Sep 04 2009 - 18:34:30 EST


Here are 3 acpi_add_single_object() kmemleak reports on 2.6.31-rc8 +
Catalin's kmemleak tree (git://linux-arm.org/linux-2.6 master).

unreferenced object 0xffff88003c405940 (size 64):
comm "swapper", pid 1, jiffies 4294892466
hex dump (first 32 bytes):
00 00 00 00 38 00 00 00 00 00 00 00 00 00 00 00 ....8...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff814e9d55>] kmemleak_alloc+0x25/0x60
[<ffffffff81119fbb>] __kmalloc+0x16b/0x250
[<ffffffff812bb379>] kzalloc+0xf/0x11
[<ffffffff812bb983>] acpi_add_single_object+0x58e/0xd3c
[<ffffffff812bc34c>] acpi_bus_scan+0x125/0x1af
[<ffffffff81818842>] acpi_scan_init+0xc8/0xe9
[<ffffffff818185fd>] acpi_init+0x21f/0x265
[<ffffffff8100a047>] do_one_initcall+0x37/0x1a0
[<ffffffff817efa16>] kernel_init+0x164/0x1ba
[<ffffffff810130ca>] child_rip+0xa/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff88003c405980 (size 64):
comm "swapper", pid 1, jiffies 4294892467
hex dump (first 32 bytes):
00 00 00 00 38 00 00 00 00 00 00 00 00 00 00 00 ....8...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff814e9d55>] kmemleak_alloc+0x25/0x60
[<ffffffff81119fbb>] __kmalloc+0x16b/0x250
[<ffffffff812bb379>] kzalloc+0xf/0x11
[<ffffffff812bb983>] acpi_add_single_object+0x58e/0xd3c
[<ffffffff812bc34c>] acpi_bus_scan+0x125/0x1af
[<ffffffff81818842>] acpi_scan_init+0xc8/0xe9
[<ffffffff818185fd>] acpi_init+0x21f/0x265
[<ffffffff8100a047>] do_one_initcall+0x37/0x1a0
[<ffffffff817efa16>] kernel_init+0x164/0x1ba
[<ffffffff810130ca>] child_rip+0xa/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff88003c4059c0 (size 64):
comm "swapper", pid 1, jiffies 4294892470
hex dump (first 32 bytes):
00 00 00 00 38 00 00 00 00 00 00 00 00 00 00 00 ....8...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff814e9d55>] kmemleak_alloc+0x25/0x60
[<ffffffff81119fbb>] __kmalloc+0x16b/0x250
[<ffffffff812bb379>] kzalloc+0xf/0x11
[<ffffffff812bb983>] acpi_add_single_object+0x58e/0xd3c
[<ffffffff812bc34c>] acpi_bus_scan+0x125/0x1af
[<ffffffff81818842>] acpi_scan_init+0xc8/0xe9
[<ffffffff818185fd>] acpi_init+0x21f/0x265
[<ffffffff8100a047>] do_one_initcall+0x37/0x1a0
[<ffffffff817efa16>] kernel_init+0x164/0x1ba
[<ffffffff810130ca>] child_rip+0xa/0x20
[<ffffffffffffffff>] 0xffffffffffffffff

Luis
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