path: root/scripts/kconfig/confdata.c
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authorGustavo A. R. Silva <gustavo@embeddedor.com>2020-01-28 20:26:13 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-01-30 06:58:33 +0100
commit98c49f1746ac44ccc164e914b9a44183fad09f51 (patch)
treee39e80575f9e1843e68cababebcc8de70fe32b73 /scripts/kconfig/confdata.c
parentMerge branch 'urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu (diff)
char: hpet: Fix out-of-bounds read bug
Currently, there is an out-of-bounds read on array hpetp->hp_dev in the following for loop: 870 for (i = 0; i < hdp->hd_nirqs; i++) 871 hpetp->hp_dev[i].hd_hdwirq = hdp->hd_irq[i]; This is due to the recent change from one-element array to flexible-array member in struct hpets: 104 struct hpets { ... 113 struct hpet_dev hp_dev[]; 114 }; This change affected the total size of the dynamic memory allocation, decreasing it by one time the size of struct hpet_dev. Fix this by adjusting the allocation size when calling struct_size(). Fixes: 987f028b8637c ("char: hpet: Use flexible-array member") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Acked-by: Eric Biggers <ebiggers@kernel.org> Link: https://lore.kernel.org/r/20200129022613.GA24281@embeddedor.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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