From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, "Paulo Alcantara (SUSE)" <pc@cjr.nz>,
Ronnie Sahlberg <lsahlber@redhat.com>,
Steve French <stfrench@microsoft.com>
Subject: [PATCH 4.19 17/39] cifs: fix potential use-after-free in cifs_echo_request()
Date: Thu, 10 Dec 2020 15:26:56 +0100 [thread overview]
Message-ID: <20201210142603.126746113@linuxfoundation.org> (raw)
In-Reply-To: <20201210142602.272595094@linuxfoundation.org>
From: Paulo Alcantara <pc@cjr.nz>
commit 212253367dc7b49ed3fc194ce71b0992eacaecf2 upstream.
This patch fixes a potential use-after-free bug in
cifs_echo_request().
For instance,
thread 1
--------
cifs_demultiplex_thread()
clean_demultiplex_info()
kfree(server)
thread 2 (workqueue)
--------
apic_timer_interrupt()
smp_apic_timer_interrupt()
irq_exit()
__do_softirq()
run_timer_softirq()
call_timer_fn()
cifs_echo_request() <- use-after-free in server ptr
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
CC: Stable <stable@vger.kernel.org>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/cifs/connect.c | 2 ++
1 file changed, 2 insertions(+)
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -777,6 +777,8 @@ static void clean_demultiplex_info(struc
list_del_init(&server->tcp_ses_list);
spin_unlock(&cifs_tcp_ses_lock);
+ cancel_delayed_work_sync(&server->echo);
+
spin_lock(&GlobalMid_Lock);
server->tcpStatus = CifsExiting;
spin_unlock(&GlobalMid_Lock);
next prev parent reply other threads:[~2020-12-10 18:35 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-10 14:26 [PATCH 4.19 00/39] 4.19.163-rc1 review Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 01/39] pinctrl: baytrail: Replace WARN with dev_info_once when setting direct-irq pin to output Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 02/39] pinctrl: baytrail: Fix pin being driven low for a while on gpiod_get(..., GPIOD_OUT_HIGH) Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 03/39] usb: gadget: f_fs: Use local copy of descriptors for userspace copy Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 04/39] USB: serial: kl5kusb105: fix memleak on open Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 05/39] USB: serial: ch341: add new Product ID for CH341A Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 06/39] USB: serial: ch341: sort device-id entries Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 07/39] USB: serial: option: add Fibocom NL668 variants Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 08/39] USB: serial: option: add support for Thales Cinterion EXS82 Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 09/39] USB: serial: option: fix Quectel BG96 matching Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 10/39] tty: Fix ->pgrp locking in tiocspgrp() Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 11/39] tty: Fix ->session locking Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 12/39] ALSA: hda/realtek: Add mute LED quirk to yet another HP x360 model Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 13/39] ALSA: hda/realtek: Enable headset of ASUS UX482EG & B9400CEA with ALC294 Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 14/39] ALSA: hda/realtek - Add new codec supported for ALC897 Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 15/39] ALSA: hda/generic: Add option to enforce preferred_dacs pairs Greg Kroah-Hartman
2020-12-11 8:36 ` Pavel Machek
2020-12-11 8:41 ` Takashi Iwai
2020-12-11 22:38 ` Pavel Machek
2020-12-11 22:40 ` Takashi Iwai
2020-12-10 14:26 ` [PATCH 4.19 16/39] ftrace: Fix updating FTRACE_FL_TRAMP Greg Kroah-Hartman
2020-12-10 14:26 ` Greg Kroah-Hartman [this message]
2020-12-10 14:26 ` [PATCH 4.19 18/39] i2c: imx: Dont generate STOP condition if arbitration has been lost Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 19/39] scsi: mpt3sas: Fix ioctl timeout Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.19 20/39] dm writecache: fix the maximum number of arguments Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 21/39] dm: remove invalid sparse __acquires and __releases annotations Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 22/39] mm: list_lru: set shrinker map bit when child nr_items is not zero Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 23/39] mm/swapfile: do not sleep with a spin lock held Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 24/39] x86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 25/39] i2c: imx: Fix reset of I2SR_IAL flag Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 26/39] i2c: imx: Check for I2SR_IAL after every byte Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 27/39] speakup: Reject setting the speakup line discipline outside of speakup Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 28/39] iommu/amd: Set DTE[IntTabLen] to represent 512 IRTEs Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 29/39] spi: Introduce device-managed SPI controller allocation Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 30/39] spi: bcm-qspi: Fix use-after-free on unbind Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 31/39] spi: bcm2835: " Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 32/39] spi: bcm2835: Release the DMA channel if probe fails after dma_init Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 33/39] tracing: Fix userstacktrace option for instances Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 34/39] gfs2: check for empty rgrp tree in gfs2_ri_update Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 35/39] i2c: qup: Fix error return code in qup_i2c_bam_schedule_desc() Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 36/39] dm writecache: remove BUG() and fail gracefully instead Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 37/39] Input: i8042 - fix error return code in i8042_setup_aux() Greg Kroah-Hartman
2020-12-11 22:35 ` Pavel Machek
2020-12-10 14:27 ` [PATCH 4.19 38/39] netfilter: nf_tables: avoid false-postive lockdep splat Greg Kroah-Hartman
2020-12-10 14:27 ` [PATCH 4.19 39/39] x86/insn-eval: Use new for_each_insn_prefix() macro to loop over prefixes bytes Greg Kroah-Hartman
2020-12-10 21:04 ` [PATCH 4.19 00/39] 4.19.163-rc1 review Jon Hunter
2020-12-10 21:06 ` Pavel Machek
2020-12-11 14:41 ` Greg Kroah-Hartman
2020-12-10 21:23 ` Shuah Khan
2020-12-10 23:44 ` Guenter Roeck
2020-12-11 7:54 ` Naresh Kamboju
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