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| author |   Shreyas Joshi <shreyas.joshi@biamp.com> | 2020-05-22 16:53:06 +1000 |
|---|---|---|
| committer |   Petr Mladek <pmladek@suse.com> | 2020-05-22 10:34:34 +0200 |
| commit | 48021f98130880dd74286459a1ef48b5e9bc374f (patch) | |
| tree | e6a21abe07796b9f31d8638457f5e161750a0c43 /include/linux/printk.h | |
| parent | kernel/printk: add kmsg SEEK_CUR handling (diff) | |
| download | linux-dev-48021f98130880dd74286459a1ef48b5e9bc374f.tar.xz linux-dev-48021f98130880dd74286459a1ef48b5e9bc374f.zip | |
printk: handle blank console arguments passed in.
If uboot passes a blank string to console_setup then it results in
a trashed memory. Ultimately, the kernel crashes during freeing up
the memory.
This fix checks if there is a blank parameter being
passed to console_setup from uboot. In case it detects that
the console parameter is blank then it doesn't setup the serial
device and it gracefully exits.
Link: https://lore.kernel.org/r/20200522065306.83-1-shreyas.joshi@biamp.com
Signed-off-by: Shreyas Joshi <shreyas.joshi@biamp.com>
Acked-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
[pmladek@suse.com: Better format the commit message and code, remove unnecessary brackets.]
Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'include/linux/printk.h')
0 files changed, 0 insertions, 0 deletions