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| author | Peng Fan <peng.fan@nxp.com> | 2020-03-13 09:58:07 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-31 16:44:45 +0200 |
| commit | 1f850ba16f920edca56ffa13adf493fe85d86498 (patch) | |
| tree | d7ee1bfff81fe6432f568d43ce1f0ba8c57e8c25 /include | |
| parent | bbacb34b84407ac008409d45b816617579ca26fd (diff) | |
| download | linux-stable-1f850ba16f920edca56ffa13adf493fe85d86498.tar.gz linux-stable-1f850ba16f920edca56ffa13adf493fe85d86498.tar.bz2 linux-stable-1f850ba16f920edca56ffa13adf493fe85d86498.zip | |
regmap: debugfs: check count when read regmap file
commit 74edd08a4fbf51d65fd8f4c7d8289cd0f392bd91 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions