mirror-linux/include
Douglas Anderson 0b03829fde drm/mipi-dsi: Fix theoretical int overflow in mipi_dsi_dcs_write_seq()
The mipi_dsi_dcs_write_seq() macro makes a call to
mipi_dsi_dcs_write_buffer() which returns a type ssize_t. The macro
then stores it in an int and checks to see if it's negative. This
could theoretically be a problem if "ssize_t" is larger than "int".

To see the issue, imagine that "ssize_t" is 32-bits and "int" is
16-bits, you could see a problem if there was some code out there that
looked like:

  mipi_dsi_dcs_write_seq(dsi, cmd, <32767 bytes as arguments>);

...since we'd get back that 32768 bytes were transferred and 32768
stored in a 16-bit int would look negative.

Though there are no callsites where we'd actually hit this (even if
"int" was only 16-bit), it's cleaner to make the types match so let's
fix it.

Fixes: 2a9e9daf75 ("drm/mipi-dsi: Introduce mipi_dsi_dcs_write_seq macro")
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20240514102056.v5.1.I30fa4c8348ea316c886ef8a522a52fed617f930d@changeid
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240514102056.v5.1.I30fa4c8348ea316c886ef8a522a52fed617f930d@changeid
2024-05-15 22:59:11 +02:00
..
acpi ACPI: bus: allow _UID matching for integer zero 2024-04-08 16:57:51 +02:00
asm-generic sched: Add missing memory barrier in switch_mm_cid 2024-04-16 13:59:45 +02:00
clocksource
crypto
drm drm/mipi-dsi: Fix theoretical int overflow in mipi_dsi_dcs_write_seq() 2024-05-15 22:59:11 +02:00
dt-bindings Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
keys
kunit
kvm KVM: arm64: Fix host-programmed guest events in nVHE 2024-03-26 01:51:44 -07:00
linux fbdev/deferred-io: Provide get_page hook in struct fb_deferred_io 2024-05-02 11:33:14 +02:00
math-emu
media
memory
misc
net af_unix: Suppress false-positive lockdep splat for spin_lock() in __unix_gc(). 2024-04-25 08:37:02 -07:00
pcmcia
ras
rdma
rv
scsi scsi: sd: Fix TCG OPAL unlock on system resume 2024-03-25 15:46:12 -04:00
soc Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
sound ASoC: Fixes for v6.9 2024-04-05 08:48:12 +02:00
target
trace 11 hotfixes. 8 are cc:stable and the remaining 3 (nice ratio!) address 2024-04-26 13:48:03 -07:00
uapi accel/ivpu: Add NPU profiling support 2024-05-15 07:42:23 +02:00
ufs
vdso vdso: Use CONFIG_PAGE_SHIFT in vdso/datapage.h 2024-04-03 21:50:04 +02:00
video
xen