From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: John Ogness <john.ogness@linutronix.de>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Petr Mladek <pmladek@suse.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Sasha Levin <sashal@kernel.org>,
agross@kernel.org, bjorn.andersson@linaro.org,
jirislaby@kernel.org, linux-arm-msm@vger.kernel.org,
linux-serial@vger.kernel.org
Subject: [PATCH AUTOSEL 5.15 27/51] serial: msm_serial: disable interrupts in __msm_console_write()
Date: Tue, 7 Jun 2022 13:55:26 -0400 [thread overview]
Message-ID: <20220607175552.479948-27-sashal@kernel.org> (raw)
In-Reply-To: <20220607175552.479948-1-sashal@kernel.org>
From: John Ogness <john.ogness@linutronix.de>
[ Upstream commit aabdbb1b7a5819e18c403334a31fb0cc2c06ad41 ]
__msm_console_write() assumes that interrupts are disabled, but
with threaded console printers it is possible that the write()
callback of the console is called with interrupts enabled.
Explicitly disable interrupts using local_irq_save() to preserve
the assumed context.
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20220506213324.470461-1-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/tty/serial/msm_serial.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index 489d19274f9a..03ff63438e77 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -1588,6 +1588,7 @@ static inline struct uart_port *msm_get_port_from_line(unsigned int line)
static void __msm_console_write(struct uart_port *port, const char *s,
unsigned int count, bool is_uartdm)
{
+ unsigned long flags;
int i;
int num_newlines = 0;
bool replaced = false;
@@ -1605,6 +1606,8 @@ static void __msm_console_write(struct uart_port *port, const char *s,
num_newlines++;
count += num_newlines;
+ local_irq_save(flags);
+
if (port->sysrq)
locked = 0;
else if (oops_in_progress)
@@ -1650,6 +1653,8 @@ static void __msm_console_write(struct uart_port *port, const char *s,
if (locked)
spin_unlock(&port->lock);
+
+ local_irq_restore(flags);
}
static void msm_console_write(struct console *co, const char *s,
--
2.35.1
next prev parent reply other threads:[~2022-06-07 18:37 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-07 17:55 [PATCH AUTOSEL 5.15 01/51] iio: dummy: iio_simple_dummy: check the return value of kstrdup() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 02/51] staging: rtl8712: fix a potential memory leak in r871xu_drv_init() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 03/51] iio: st_sensors: Add a local lock for protecting odr Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 04/51] lkdtm/usercopy: Expand size of "out of frame" object Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 05/51] drivers: staging: rtl8723bs: Fix deadlock in rtw_surveydone_event_callback() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 06/51] drivers: staging: rtl8192bs: Fix deadlock in rtw_joinbss_event_prehandle() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 07/51] tty: synclink_gt: Fix null-pointer-dereference in slgt_clean() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 08/51] tty: Fix a possible resource leak in icom_probe Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 09/51] thunderbolt: Use different lane for second DisplayPort tunnel Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 10/51] drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 11/51] drivers: staging: rtl8192e: Fix deadlock in rtllib_beacons_stop() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 12/51] USB: host: isp116x: check return value after calling platform_get_resource() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 13/51] drivers: tty: serial: Fix deadlock in sa1100_set_termios() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 14/51] drivers: usb: host: Fix deadlock in oxu_bus_suspend() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 15/51] USB: hcd-pci: Fully suspend across freeze/thaw cycle Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 16/51] char: xillybus: fix a refcount leak in cleanup_dev() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 17/51] sysrq: do not omit current cpu when showing backtrace of all active CPUs Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 18/51] usb: dwc2: gadget: don't reset gadget's driver->bus Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 19/51] soundwire: qcom: adjust autoenumeration timeout Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 20/51] misc: rtsx: set NULL intfdata when probe fails Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 21/51] extcon: Fix extcon_get_extcon_dev() error handling Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 22/51] extcon: Modify extcon device to be created after driver data is set Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 23/51] clocksource/drivers/sp804: Avoid error on multiple instances Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 24/51] staging: rtl8723bs: Fix alignment to match open parenthesis Sasha Levin
2022-06-08 0:04 ` Joe Perches
2022-06-08 6:15 ` Greg Kroah-Hartman
2022-06-09 13:55 ` Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 25/51] staging: rtl8712: fix uninit-value in usb_read8() and friends Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 26/51] staging: rtl8712: fix uninit-value in r871xu_drv_init() Sasha Levin
2022-06-07 17:55 ` Sasha Levin [this message]
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 28/51] accessiblity: speakup: Add missing misc_deregister in softsynth_probe Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 29/51] kernfs: Separate kernfs_pr_cont_buf and rename_lock Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 30/51] watchdog: wdat_wdt: Stop watchdog when rebooting the system Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 31/51] md: don't unregister sync_thread with reconfig_mutex held Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 32/51] md: protect md_unregister_thread from reentrancy Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 33/51] scsi: myrb: Fix up null pointer access on myrb_cleanup() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 34/51] Revert "net: af_key: add check for pfkey_broadcast in function pfkey_process" Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 35/51] ceph: allow ceph.dir.rctime xattr to be updatable Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 36/51] ceph: flush the mdlog for filesystem sync Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 37/51] drm/amd/display: Check if modulo is 0 before dividing Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 38/51] drm/radeon: fix a possible null pointer dereference Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 39/51] drm/amd/pm: Fix missing thermal throttler status Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 40/51] um: line: Use separate IRQs per line Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 41/51] modpost: fix undefined behavior of is_arm_mapping_symbol() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 42/51] x86/cpu: Elide KCSAN for cpu_has() and friends Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 43/51] jump_label,noinstr: Avoid instrumentation for JUMP_LABEL=n builds Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 44/51] nbd: call genl_unregister_family() first in nbd_cleanup() Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 45/51] nbd: fix race between nbd_alloc_config() and module removal Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 46/51] nbd: fix io hung while disconnecting device Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 47/51] fs/ntfs3: Fix invalid free in log_replay Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 48/51] s390/gmap: voluntarily schedule during key setting Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 49/51] cifs: version operations for smb20 unneeded when legacy support disabled Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 50/51] drm/amd/pm: use bitmap_{from,to}_arr32 where appropriate Sasha Levin
2022-06-07 17:55 ` [PATCH AUTOSEL 5.15 51/51] nodemask: Fix return values to be unsigned Sasha Levin
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