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| author | Zheyu Ma <[email protected]> | 2022-04-04 16:47:21 +0800 |
|---|---|---|
| committer | Helge Deller <[email protected]> | 2022-04-11 08:23:50 +0200 |
| commit | 16844e5870424c2728486dc0c0300ebf7fa09ad6 (patch) | |
| tree | 7bc4ca2a1a6e01f825165d585d9ce37b87419f36 /lib/mpi/mpi-sub-ui.c | |
| parent | f2bfd792c1ed4b1e0578db3fcdb0879dc87fe027 (diff) | |
video: fbdev: tridentfb: Error out if 'pixclock' equals zero
The userspace program could pass any values to the driver through
ioctl() interface. If the driver doesn't check the value of 'pixclock',
it may cause divide error.
Fix this by checking whether 'pixclock' is zero.
The following log reveals it:
divide error: 0000 [#1] PREEMPT SMP KASAN PTI
RIP: 0010:tridentfb_check_var+0x853/0xe60
Call Trace:
<TASK>
fb_set_var+0x367/0xeb0
do_fb_ioctl+0x234/0x670
fb_ioctl+0xdd/0x130
do_syscall_64+0x3b/0x90
Signed-off-by: Zheyu Ma <[email protected]>
Signed-off-by: Helge Deller <[email protected]>
Diffstat (limited to 'lib/mpi/mpi-sub-ui.c')
0 files changed, 0 insertions, 0 deletions