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| author | Yizhuo Zhai <yzhai003@ucr.edu> | 2021-06-19 22:26:50 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-20 16:05:44 +0200 |
| commit | 90cd79aa9ac7d8f8a6eea65cc07fe88b451af68a (patch) | |
| tree | 13f9bda65c1dcc71199aa9a768948e36fe0d058f | |
| parent | a50b56ffc0c88c15dacab89cf72a1ce912bdfe6e (diff) | |
| download | kernel_replicant_linux-90cd79aa9ac7d8f8a6eea65cc07fe88b451af68a.tar.gz kernel_replicant_linux-90cd79aa9ac7d8f8a6eea65cc07fe88b451af68a.tar.bz2 kernel_replicant_linux-90cd79aa9ac7d8f8a6eea65cc07fe88b451af68a.zip | |
Input: hideep - fix the uninitialized use in hideep_nvm_unlock()
[ Upstream commit cac7100d4c51c04979dacdfe6c9a5e400d3f0a27 ]
Inside function hideep_nvm_unlock(), variable "unmask_code" could
be uninitialized if hideep_pgm_r_reg() returns error, however, it
is used in the later if statement after an "and" operation, which
is potentially unsafe.
Signed-off-by: Yizhuo <yzhai003@ucr.edu>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/input/touchscreen/hideep.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/input/touchscreen/hideep.c b/drivers/input/touchscreen/hideep.c index ddad4a82a5e5..e9547ee29756 100644 --- a/drivers/input/touchscreen/hideep.c +++ b/drivers/input/touchscreen/hideep.c @@ -361,13 +361,16 @@ static int hideep_enter_pgm(struct hideep_ts *ts) return -EIO; } -static void hideep_nvm_unlock(struct hideep_ts *ts) +static int hideep_nvm_unlock(struct hideep_ts *ts) { u32 unmask_code; + int error; hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_SFR_RPAGE); - hideep_pgm_r_reg(ts, 0x0000000C, &unmask_code); + error = hideep_pgm_r_reg(ts, 0x0000000C, &unmask_code); hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_DEFAULT_PAGE); + if (error) + return error; /* make it unprotected code */ unmask_code &= ~HIDEEP_PROT_MODE; @@ -384,6 +387,8 @@ static void hideep_nvm_unlock(struct hideep_ts *ts) NVM_W_SFR(HIDEEP_NVM_MASK_OFS, ts->nvm_mask); SET_FLASH_HWCONTROL(); hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_DEFAULT_PAGE); + + return 0; } static int hideep_check_status(struct hideep_ts *ts) @@ -462,7 +467,9 @@ static int hideep_program_nvm(struct hideep_ts *ts, u32 addr = 0; int error; - hideep_nvm_unlock(ts); + error = hideep_nvm_unlock(ts); + if (error) + return error; while (ucode_len > 0) { xfer_len = min_t(size_t, ucode_len, HIDEEP_NVM_PAGE_SIZE); |