diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2012-02-11 00:18:30 -0800 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2012-02-23 12:08:53 -0800 |
| commit | f796841e49fe086176e27ed0e1f3f7a1123a4a6b (patch) | |
| tree | 60d5b1f245ba1a2ca6d81e5e73379cfb26089071 /drivers/pci | |
| parent | 2dd8ba921d570fcd016f8038c63fa9668892d16b (diff) | |
PCI: fix memleak for pci dev removing during hotplug
unreferenced object 0xffff880276d17700 (size 64):
comm "swapper/0", pid 1, jiffies 4294897182 (age 3976.028s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 18 f9 de 76 02 88 ff ff ...........v....
10 00 00 00 0e 00 00 00 0f 28 40 00 00 00 00 00 .........(@.....
backtrace:
[<ffffffff81c8aede>] kmemleak_alloc+0x26/0x43
[<ffffffff811385f0>] __kmalloc+0x121/0x183
[<ffffffff813cf821>] pci_add_cap_save_buffer+0x35/0x7c
[<ffffffff813d12b7>] pci_allocate_cap_save_buffers+0x1d/0x65
[<ffffffff813cdb52>] pci_device_add+0x92/0xf1
[<ffffffff81c8afe6>] pci_scan_single_device+0x9f/0xa1
[<ffffffff813cdbd2>] pci_scan_slot.part.20+0x21/0x106
[<ffffffff813cdce2>] pci_scan_slot+0x2b/0x35
[<ffffffff81c8dae4>] __pci_scan_child_bus+0x51/0x107
[<ffffffff81c8d75b>] pci_scan_bridge+0x376/0x6ae
[<ffffffff81c8db60>] __pci_scan_child_bus+0xcd/0x107
[<ffffffff81c8dbab>] pci_scan_child_bus+0x11/0x2a
[<ffffffff81cca58c>] pci_acpi_scan_root+0x18b/0x21c
[<ffffffff81c916be>] acpi_pci_root_add+0x1e1/0x42a
[<ffffffff81406210>] acpi_device_probe+0x50/0x190
[<ffffffff814a0227>] really_probe+0x99/0x126
Need to free saved_buffer for capabilities.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci.c | 9 | ||||
| -rw-r--r-- | drivers/pci/pci.h | 1 | ||||
| -rw-r--r-- | drivers/pci/probe.c | 1 |
3 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 9c89447e7b2..e7dfcd44757 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1916,6 +1916,15 @@ void pci_allocate_cap_save_buffers(struct pci_dev *dev) "unable to preallocate PCI-X save buffer\n"); } +void pci_free_cap_save_buffers(struct pci_dev *dev) +{ + struct pci_cap_saved_state *tmp; + struct hlist_node *pos, *n; + + hlist_for_each_entry_safe(tmp, pos, n, &dev->saved_cap_space, next) + kfree(tmp); +} + /** * pci_enable_ari - enable ARI forwarding if hardware support it * @dev: the PCI device diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index aaf7ff8c517..586ac9b097e 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -73,6 +73,7 @@ extern int __pci_pme_wakeup(struct pci_dev *dev, void *ign); extern void pci_pm_init(struct pci_dev *dev); extern void platform_pci_wakeup_init(struct pci_dev *dev); extern void pci_allocate_cap_save_buffers(struct pci_dev *dev); +void pci_free_cap_save_buffers(struct pci_dev *dev); static inline void pci_wakeup_event(struct pci_dev *dev) { diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index aa9b1dec0d3..dc904bd4b56 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1024,6 +1024,7 @@ static void pci_release_capabilities(struct pci_dev *dev) { pci_vpd_release(dev); pci_iov_release(dev); + pci_free_cap_save_buffers(dev); } /** |