fbdev: ssd1307fb: fix NULL pointer dereference on missing match data

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device_get_match_data() can return NULL, e.g. when the device is matched
through the I2C device ID table rather than the OF match table. The
returned value is stored in par->device_info and later dereferenced when
initializing par->vcomh, causing a NULL pointer dereference.

Check the return value right after the assignment and bail out with
-ENODEV (releasing the already allocated framebuffer) before any
dereference.

Signed-off-by: Yang Zi <2959243019@qq.com>
Signed-off-by: Helge Deller <deller@gmx.de>

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Yang Zi 2026-08-25 16:58:15 +08:00 • committed by Helge Deller

parent 94e6a058b1

commit 3fb13d29cf

1 changed files with 4 additions and 0 deletions

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drivers/video/fbdev/ssd1307fb.c

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