All of lore.kernel.org
 help / color / mirror / Atom feed
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, Lars-Peter Clausen <lars@metafoo.de>,
	Takashi Iwai <tiwai@suse.de>
Subject: [PATCH 4.19 44/62] ALSA: memalloc: Align buffer allocations in page size
Date: Wed, 27 Jul 2022 18:10:53 +0200	[thread overview]
Message-ID: <20220727161005.890833787@linuxfoundation.org> (raw)
In-Reply-To: <20220727161004.175638564@linuxfoundation.org>

From: Takashi Iwai <tiwai@suse.de>

commit 5c1733e33c888a3cb7f576564d8ad543d5ad4a9e upstream.

Currently the standard memory allocator (snd_dma_malloc_pages*())
passes the byte size to allocate as is.  Most of the backends
allocates real pages, hence the actual allocations are aligned in page
size.  However, the genalloc doesn't seem assuring the size alignment,
hence it may result in the access outside the buffer when the whole
memory pages are exposed via mmap.

For avoiding such inconsistencies, this patch makes the allocation
size always to be aligned in page size.

Note that, after this change, snd_dma_buffer.bytes field contains the
aligned size, not the originally requested size.  This value is also
used for releasing the pages in return.

Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20201218145625.2045-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/core/memalloc.c |    1 +
 1 file changed, 1 insertion(+)

--- a/sound/core/memalloc.c
+++ b/sound/core/memalloc.c
@@ -179,6 +179,7 @@ int snd_dma_alloc_pages(int type, struct
 	if (WARN_ON(!dmab))
 		return -ENXIO;
 
+	size = PAGE_ALIGN(size);
 	dmab->dev.type = type;
 	dmab->dev.dev = device;
 	dmab->bytes = 0;



  parent reply	other threads:[~2022-07-27 16:34 UTC|newest]

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-27 16:10 [PATCH 4.19 00/62] 4.19.254-rc1 review Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 01/62] riscv: add as-options for modules with assembly compontents Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 02/62] xen/gntdev: Ignore failure to unmap INVALID_GRANT_HANDLE Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 03/62] xfrm: xfrm_policy: fix a possible double xfrm_pols_put() in xfrm_bundle_lookup() Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 04/62] power/reset: arm-versatile: Fix refcount leak in versatile_reboot_probe Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 05/62] pinctrl: ralink: Check for null return of devm_kcalloc Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 06/62] perf/core: Fix data race between perf_event_set_output() and perf_mmap_close() Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 07/62] ip: Fix data-races around sysctl_ip_fwd_use_pmtu Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 08/62] ip: Fix data-races around sysctl_ip_nonlocal_bind Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 09/62] ip: Fix a data-race around sysctl_fwmark_reflect Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 10/62] tcp/dccp: Fix a data-race around sysctl_tcp_fwmark_accept Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 11/62] tcp: Fix data-races around sysctl_tcp_mtu_probing Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 12/62] tcp: Fix a data-race around sysctl_tcp_probe_threshold Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 13/62] tcp: Fix a data-race around sysctl_tcp_probe_interval Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 14/62] i2c: cadence: Change large transfer count reset logic to be unconditional Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 15/62] net: stmmac: fix dma queue left shift overflow issue Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 16/62] net/tls: Fix race in TLS device down flow Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 17/62] igmp: Fix data-races around sysctl_igmp_llm_reports Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 18/62] igmp: Fix a data-race around sysctl_igmp_max_memberships Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 19/62] tcp: Fix data-races around sysctl_tcp_reordering Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 20/62] tcp: Fix data-races around some timeout sysctl knobs Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 21/62] tcp: Fix a data-race around sysctl_tcp_notsent_lowat Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 22/62] tcp: Fix a data-race around sysctl_tcp_tw_reuse Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 23/62] tcp: Fix data-races around sysctl_tcp_fastopen Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 24/62] be2net: Fix buffer overflow in be_get_module_eeprom Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 25/62] tcp: Fix a data-race around sysctl_tcp_early_retrans Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 26/62] tcp: Fix data-races around sysctl_tcp_recovery Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 27/62] tcp: Fix a data-race around sysctl_tcp_thin_linear_timeouts Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 28/62] tcp: Fix data-races around sysctl_tcp_slow_start_after_idle Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 29/62] tcp: Fix a data-race around sysctl_tcp_retrans_collapse Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 30/62] tcp: Fix a data-race around sysctl_tcp_stdurg Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 31/62] tcp: Fix a data-race around sysctl_tcp_rfc1337 Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 32/62] tcp: Fix data-races around sysctl_tcp_max_reordering Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 33/62] Revert "Revert "char/random: silence a lockdep splat with printk()"" Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 34/62] mm/mempolicy: fix uninit-value in mpol_rebind_policy() Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 35/62] bpf: Make sure mac_header was set before using it Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 36/62] drm/tilcdc: Remove obsolete crtc_mode_valid() hack Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 37/62] tilcdc: tilcdc_external: fix an incorrect NULL check on list iterator Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 38/62] HID: multitouch: simplify the application retrieval Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 39/62] HID: multitouch: Lenovo X1 Tablet Gen3 trackpoint and buttons Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 40/62] HID: multitouch: add support for the Smart Tech panel Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 41/62] HID: add ALWAYS_POLL quirk to lenovo pixart mouse Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 42/62] dlm: fix pending remove if msg allocation fails Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 43/62] ima: remove the IMA_TEMPLATE Kconfig option Greg Kroah-Hartman
2022-07-27 16:10 ` Greg Kroah-Hartman [this message]
2022-07-27 16:10 ` [PATCH 4.19 45/62] Bluetooth: Add bt_skb_sendmsg helper Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 46/62] Bluetooth: Add bt_skb_sendmmsg helper Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 47/62] Bluetooth: SCO: Replace use of memcpy_from_msg with bt_skb_sendmsg Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 48/62] Bluetooth: RFCOMM: Replace use of memcpy_from_msg with bt_skb_sendmmsg Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 49/62] Bluetooth: Fix passing NULL to PTR_ERR Greg Kroah-Hartman
2022-07-27 16:10 ` [PATCH 4.19 50/62] Bluetooth: SCO: Fix sco_send_frame returning skb->len Greg Kroah-Hartman
2022-07-27 16:11 ` [PATCH 4.19 51/62] Bluetooth: Fix bt_skb_sendmmsg not allocating partial chunks Greg Kroah-Hartman
2022-07-27 16:11 ` [PATCH 4.19 52/62] serial: mvebu-uart: correctly report configured baudrate value Greg Kroah-Hartman
2022-07-27 16:11 ` [PATCH 4.19 53/62] tty: drivers/tty/, stop using tty_schedule_flip() Greg Kroah-Hartman
2022-07-27 16:11 ` [PATCH 4.19 54/62] tty: the rest, " Greg Kroah-Hartman
2022-07-27 16:11 ` [PATCH 4.19 55/62] tty: drop tty_schedule_flip() Greg Kroah-Hartman
2022-07-27 16:11 ` [PATCH 4.19 56/62] tty: extract tty_flip_buffer_commit() from tty_flip_buffer_push() Greg Kroah-Hartman
2022-07-27 16:11 ` [PATCH 4.19 57/62] tty: use new tty_insert_flip_string_and_push_buffer() in pty_write() Greg Kroah-Hartman
2022-07-27 16:11 ` [PATCH 4.19 58/62] net: usb: ax88179_178a needs FLAG_SEND_ZLP Greg Kroah-Hartman
2022-07-27 16:11 ` [PATCH 4.19 59/62] PCI: hv: Fix multi-MSI to allow more than one MSI vector Greg Kroah-Hartman
2022-07-27 16:11 ` [PATCH 4.19 60/62] PCI: hv: Fix hv_arch_irq_unmask() for multi-MSI Greg Kroah-Hartman
2022-07-27 16:11 ` [PATCH 4.19 61/62] PCI: hv: Reuse existing IRTE allocation in compose_msi_msg() Greg Kroah-Hartman
2022-07-27 16:11 ` [PATCH 4.19 62/62] PCI: hv: Fix interrupt mapping for multi-MSI Greg Kroah-Hartman
2022-07-28  9:42 ` [PATCH 4.19 00/62] 4.19.254-rc1 review Pavel Machek
2022-07-28  9:45 ` Naresh Kamboju
2022-07-28 14:31 ` Sudip Mukherjee (Codethink)
2022-07-28 14:32 ` Jon Hunter
2022-07-28 14:51 ` Shuah Khan
2022-07-28 22:58 ` Guenter Roeck

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20220727161005.890833787@linuxfoundation.org \
    --to=gregkh@linuxfoundation.org \
    --cc=lars@metafoo.de \
    --cc=linux-kernel@vger.kernel.org \
    --cc=stable@vger.kernel.org \
    --cc=tiwai@suse.de \
    --subject='Re: [PATCH 4.19 44/62] ALSA: memalloc: Align buffer allocations in page size' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.