Hui Wang 9f34290421
ASoC: cs35l41: Fix an out-of-bounds access in otp_packed_element_t
The CS35L41_NUM_OTP_ELEM is 100, but only 99 entries are defined in
the array otp_map_1/2[CS35L41_NUM_OTP_ELEM], this will trigger UBSAN
to report a shift-out-of-bounds warning in the cs35l41_otp_unpack()
since the last entry in the array will result in GENMASK(-1, 0).

UBSAN reports this problem:
 UBSAN: shift-out-of-bounds in /home/hwang4/build/jammy/jammy/sound/soc/codecs/cs35l41-lib.c:836:8
 shift exponent 64 is too large for 64-bit type 'long unsigned int'
 CPU: 10 PID: 595 Comm: systemd-udevd Not tainted 5.15.0-23-generic #23
 Hardware name: LENOVO \x02MFG_IN_GO/\x02MFG_IN_GO, BIOS N3GET19W (1.00 ) 03/11/2022
 Call Trace:
  <TASK>
  show_stack+0x52/0x58
  dump_stack_lvl+0x4a/0x5f
  dump_stack+0x10/0x12
  ubsan_epilogue+0x9/0x45
  __ubsan_handle_shift_out_of_bounds.cold+0x61/0xef
  ? regmap_unlock_mutex+0xe/0x10
  cs35l41_otp_unpack.cold+0x1c6/0x2b2 [snd_soc_cs35l41_lib]
  cs35l41_hda_probe+0x24f/0x33a [snd_hda_scodec_cs35l41]
  cs35l41_hda_i2c_probe+0x65/0x90 [snd_hda_scodec_cs35l41_i2c]
  ? cs35l41_hda_i2c_remove+0x20/0x20 [snd_hda_scodec_cs35l41_i2c]
  i2c_device_probe+0x252/0x2b0

Fixes: 6450ef559056 ("ASoC: cs35l41: CS35L41 Boosted Smart Amplifier")
Reviewed-by: Lucas Tanure <tanureal@opensource.cirrus.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://lore.kernel.org/r/20220328123535.50000-2-hui.wang@canonical.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2022-04-05 10:23:16 +01:00
..
2022-03-21 16:19:21 +01:00
2017-11-13 15:45:57 +01:00
2020-11-30 12:54:02 +00:00
2020-09-09 18:32:52 +02:00
2019-10-25 11:06:57 +01:00