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Daniel Borkmann c540594f86 bpf, mlx4: fix prog refcount in mlx4_en_try_alloc_resources error path 
Commit 67f8b1dcb9 ("net/mlx4_en: Refactor the XDP forwarding rings
scheme") added a bug in that the prog's reference count is not dropped
in the error path when mlx4_en_try_alloc_resources() is failing from
mlx4_xdp_set().

We previously took bpf_prog_add(prog, priv->rx_ring_num - 1), that we
need to release again. Earlier in the call path, dev_change_xdp_fd()
itself holds a reference to the prog as well (hence the '- 1' in the
bpf_prog_add()), so a simple atomic_sub() is safe to use here. When
an error is propagated, then bpf_prog_put() is called eventually from
dev_change_xdp_fd()

Fixes: 67f8b1dcb9 ("net/mlx4_en: Refactor the XDP forwarding rings scheme")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2016-11-12 23:31:57 -05:00
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accessibility
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acpi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-30 12:42:58 -04:00
amba
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android ANDROID: binder: Clear binder and cookie when setting handle in flat binder struct 2016-10-24 19:37:48 +02:00
ata ahci: fix the single MSI-X case in ahci_init_one 2016-10-25 11:43:07 -04:00
atm solos-pci: use permission-specific DEVICE_ATTR variants 2016-10-31 15:32:12 -04:00
auxdisplay auxdisplay: img-ascii-lcd: driver for simple ASCII LCD displays 2016-10-06 17:03:41 +02:00
base driver core: Make Kconfig text for DEBUG_TEST_DRIVER_REMOVE stronger 2016-10-27 17:47:12 +02:00
bcma
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block block: DAC960: print a hex number after a 0x prefix 2016-10-27 18:43:43 -07:00
bluetooth Bluetooth: btwilink: Fix probe return value 2016-10-20 10:14:49 +02:00
bus bus: qcom-ebi2: depend on ARCH_QCOM or COMPILE_TEST 2016-10-17 13:46:09 -07:00
cdrom
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char Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-30 12:42:58 -04:00
clk clk: at91: Fix a return value in case of error 2016-10-20 16:37:56 -07:00
clocksource Revert "clocksource/drivers/timer_sun5i: Replace code by clocksource_mmio_init" 2016-10-20 21:58:58 +02:00
connector
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cpufreq Merge branches 'pm-cpufreq-fixes' and 'pm-sleep-fixes' 2016-10-29 01:29:17 +02:00
cpuidle Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-10-15 09:26:12 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-10-10 14:04:16 -07:00
dax device-dax: fix percpu_ref_exit ordering 2016-10-27 17:04:05 -07:00
dca
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devfreq PM / devfreq: Skip status update on uninitialized previous_freq 2016-10-11 00:01:20 +02:00
dio
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dma dmaengine updates for 4.8-rc1 2016-10-06 17:13:54 -07:00
dma-buf Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux 2016-10-11 18:12:22 -07:00
edac * Altera Arria10 enablement of NAND, DMA, USB, QSPI and SD-MMC FIFO 2016-10-04 12:06:26 -07:00
eisa
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extcon extcon: qcom-spmi-misc: Sync the extcon state on interrupt 2016-10-26 16:04:29 +09:00
firewire Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-30 12:42:58 -04:00
firmware efi/arm: Fix absolute relocation detection for older toolchains 2016-10-19 14:49:44 +02:00
fmc
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fpga
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gpio gpio: mpc8xxx: Correct irq handler function 2016-10-24 02:20:40 +02:00
gpu drm/drivers: add support for using the arch wc mapping API. 2016-10-26 16:48:01 +10:00
hid HID: add quirk for Akai MIDImix. 2016-10-10 10:58:22 +02:00
hsi net: use core MTU range checking in misc drivers 2016-10-20 14:51:10 -04:00
hv hv: do not lose pending heartbeat vmbus packets 2016-10-25 08:52:10 +02:00
hwmon hwmon: (max31790) potential ERR_PTR dereference 2016-10-17 10:16:20 -07:00
hwspinlock
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hwtracing
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i2c i2c: imx: defer probe if bus recovery GPIOs are not ready 2016-10-25 12:15:00 +02:00
ide
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idle nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
iio First set of IIO fixes for the 4.9 cycle. 2016-10-24 10:50:13 +02:00
infiniband net/mlx5: Support encap id when setting new steering entry 2016-11-09 13:41:56 -05:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2016-10-14 13:19:30 -07:00
iommu IOMMU Updates for Linux v4.9 2016-10-11 12:52:41 -07:00
ipack ipack: print a hex number after a 0x prefix 2016-10-27 18:43:43 -07:00
irqchip GIC updates for Linux 4.9-rc2 2016-10-21 21:40:29 +02:00
isdn net: deprecate eth_change_mtu, remove usage 2016-10-13 09:36:57 -04:00
leds
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lguest
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lightnvm Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block 2016-10-07 14:42:05 -07:00
macintosh
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mailbox Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2016-10-06 17:36:53 -07:00
mcb
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md - A couple DM raid and DM mirror fixes 2016-10-28 09:27:58 -07:00
media Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-30 12:42:58 -04:00
memory ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
memstick memstick: rtsx_usb_ms: Manage runtime PM when accessing the device 2016-10-17 15:43:05 +02:00
message net: use core MTU range checking in misc drivers 2016-10-20 14:51:10 -04:00
mfd - Core Frameworks 2016-10-07 08:35:35 -07:00
misc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-30 12:42:58 -04:00
mmc mmc: rtsx_usb_sdmmc: Handle runtime PM while changing the led 2016-10-17 15:43:03 +02:00
mtd ubi: fastmap: Fix add_vol() return value test in ubi_attach_fastmap() 2016-10-28 14:48:18 +02:00
net bpf, mlx4: fix prog refcount in mlx4_en_try_alloc_resources error path 2016-11-12 23:31:57 -05:00
nfc
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ntb
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nubus
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nvdimm nvdimm: make CONFIG_NVDIMM_DAX 'bool' 2016-10-27 16:16:21 -07:00
nvme Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2016-10-21 10:54:01 -07:00
nvmem ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
of Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-10-15 09:26:12 -07:00
oprofile Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-10 20:16:43 -07:00
parisc
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parport
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pci doc: Add missing parameter for msi_setup 2016-10-26 12:05:34 +02:00
pcmcia
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perf perf: xgene: Remove bogus IS_ERR() check 2016-10-17 15:50:07 +01:00
phy
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pinctrl pinctrl: intel: Only restore pins that are used by the driver 2016-10-18 14:38:16 +02:00
platform platform-drivers-x86 for 4.9-2 2016-10-19 11:45:06 -07:00
pnp
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power power supply and reset changes for the v4.9 series 2016-10-06 18:21:15 -07:00
powercap
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pps pps: kc: fix non-tickless system config dependency 2016-10-11 15:06:32 -07:00
ps3
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ptp ptp: Introduce a high resolution frequency adjustment method. 2016-11-09 21:19:53 -05:00
pwm
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rapidio mm: replace get_user_pages() write/force parameters with gup_flags 2016-10-19 08:11:43 -07:00
ras
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regulator Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2016-10-12 11:05:23 -07:00
remoteproc rpmsg updates for v4.9 2016-10-06 17:03:49 -07:00
reset reset: uniphier: rename MIO reset to SD reset for Pro5, PXs2, LD20 SoCs 2016-10-22 18:31:42 +09:00
rpmsg
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rtc RTC for 4.9 2016-10-14 13:13:44 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-30 12:42:58 -04:00
sbus
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scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-30 12:42:58 -04:00
sfi
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sh
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sn
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soc powerpc updates for 4.9 #2 2016-10-14 11:07:42 -07:00
spi kthread: kthread worker API cleanup 2016-10-11 15:06:33 -07:00
spmi
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ssb
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staging Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-30 12:42:58 -04:00
target Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-30 12:42:58 -04:00
tc
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thermal Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-30 12:42:58 -04:00
thunderbolt
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tty Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-30 12:42:58 -04:00
uio
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usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-30 12:42:58 -04:00
uwb
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vfio
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vhost
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video Merge branch 'gup_flag-cleanups' 2016-10-19 08:39:47 -07:00
virt mm: replace get_user_pages() write/force parameters with gup_flags 2016-10-19 08:11:43 -07:00
virtio
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vlynq
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vme vme: vme_get_size potentially returning incorrect value on failure 2016-10-28 08:25:18 -04:00
w1
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watchdog Merge branches 'acpi-wdat' and 'acpi-cppc' 2016-10-21 22:24:23 +02:00
xen xen: fixes for 4.9-rc2 2016-10-24 19:52:24 -07:00
zorro
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Kconfig
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Makefile A small bug fix and a new driver for acting as an IPMI device. 2016-10-23 15:56:23 -07:00