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author | Arnd Bergmann <arnd@arndb.de> | 2020-12-15 00:37:46 +0300 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2020-12-15 02:02:04 +0300 |
commit | f051ae4f6c732c231046945b36234e977f8467c6 (patch) | |
tree | f46c26cb5fcd375d80940adaba6f0402db2eb622 /drivers/input/mouse/vsxxxaa.c | |
parent | 3993a1a951feba40c0fbc87c0d3a888dbb0f768f (diff) | |
download | linux-f051ae4f6c732c231046945b36234e977f8467c6.tar.xz |
Input: cyapa_gen6 - fix out-of-bounds stack access
gcc -Warray-bounds warns about a serious bug in
cyapa_pip_retrieve_data_structure:
drivers/input/mouse/cyapa_gen6.c: In function 'cyapa_pip_retrieve_data_structure.constprop':
include/linux/unaligned/access_ok.h:40:17: warning: array subscript -1 is outside array bounds of 'struct retrieve_data_struct_cmd[1]' [-Warray-bounds]
40 | *((__le16 *)p) = cpu_to_le16(val);
drivers/input/mouse/cyapa_gen6.c:569:13: note: while referencing 'cmd'
569 | } __packed cmd;
| ^~~
Apparently the '-2' was added to the pointer instead of the value,
writing garbage into the stack next to this variable.
Fixes: c2c06c41f700 ("Input: cyapa - add gen6 device module support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20201026161332.3708389-1-arnd@kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/mouse/vsxxxaa.c')
0 files changed, 0 insertions, 0 deletions