AuxXxilium/linux_dsm_epyc7002
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74edd08a4f
linux_dsm_epyc7002/drivers/base/regmap
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Peng Fan 74edd08a4f
regmap: debugfs: check count when read regmap file 
When executing the following command, we met kernel dump.
dmesg -c > /dev/null; cd /sys;
for i in `ls /sys/kernel/debug/regmap/* -d`; do
	echo "Checking regmap in $i";
	cat $i/registers;
done && grep -ri "0x02d0" *;

It is because the count value is too big, and kmalloc fails. So add an
upper bound check to allow max size `PAGE_SIZE << (MAX_ORDER - 1)`.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1584064687-12964-1-git-send-email-peng.fan@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-03-13 16:33:58 +00:00
..
internal.h regmap: add proper SPDX identifiers on files that did not have them. 2019-04-25 20:22:15 +01:00
Kconfig soundwire: fix regmap dependencies and align with other serial links 2019-08-09 10:20:40 +05:30
Makefile regmap: add i3c bus support 2019-06-07 13:09:55 +01:00
regcache-flat.c regmap: add proper SPDX identifiers on files that did not have them. 2019-04-25 20:22:15 +01:00
regcache-lzo.c regmap: lzo: Switch to bitmap_zalloc() 2019-06-17 15:18:44 +01:00
regcache-rbtree.c regmap: add proper SPDX identifiers on files that did not have them. 2019-04-25 20:22:15 +01:00
regcache.c regmap: add proper SPDX identifiers on files that did not have them. 2019-04-25 20:22:15 +01:00
regmap-ac97.c regmap: add proper SPDX identifiers on files that did not have them. 2019-04-25 20:22:15 +01:00
regmap-debugfs.c regmap: debugfs: check count when read regmap file 2020-03-13 16:33:58 +00:00
regmap-i2c.c regmap-i2c: constify regmap_bus structures 2020-01-06 20:46:44 +00:00
regmap-i3c.c regmap: add i3c bus support 2019-06-07 13:09:55 +01:00
regmap-irq.c regmap-irq: Correct error paths in regmap_irq_thread for pm_runtime 2019-08-12 14:03:20 +01:00
regmap-mmio.c regmap: add proper SPDX identifiers on files that did not have them. 2019-04-25 20:22:15 +01:00
regmap-sccb.c regmap: sccb: fix typo and sort headers alphabetically 2018-07-23 18:05:08 +01:00
regmap-sdw.c regmap: Add SoundWire bus support 2018-01-08 11:27:18 +00:00
regmap-slimbus.c regmap: slimbus: add support to multi read/write 2018-07-11 11:58:04 +01:00
regmap-spi.c regmap: add proper SPDX identifiers on files that did not have them. 2019-04-25 20:22:15 +01:00
regmap-spmi.c regmap: add proper SPDX identifiers on files that did not have them. 2019-04-25 20:22:15 +01:00
regmap-w1.c regmap: regmap-w1: Drop unreachable code 2019-11-19 13:09:20 +00:00
regmap.c regmap: fix writes to non incrementing registers 2020-01-21 17:16:26 +00:00
trace.h