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author | Jiri Slaby <jslaby@suse.cz> | 2021-07-23 09:43:12 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-27 12:17:20 +0200 |
commit | 0524513afe45a4a79f418c0377160b7712cab78a (patch) | |
tree | eab43a3f41c183818029805709a1abbf6625ef21 /arch/alpha/kernel/ptrace.c | |
parent | 7ccbdcc4d08a6d7041e4849219bbb12ffa45db4c (diff) | |
download | linux-0524513afe45a4a79f418c0377160b7712cab78a.tar.gz |
tty: don't store semi-state into tty drivers
When a tty driver pointer is used as a return value of struct console's device() hook, don't store a semi-state into global variable which holds the tty driver. It could mean console::device() would return a bogus value. This is important esp. after the next patch where we switch from alloc_tty_driver to tty_alloc_driver. tty_alloc_driver returns ERR_PTR in case of error and that might have unexpected results as the code doesn't expect this. Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Helge Deller <deller@gmx.de> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Laurentiu Tudor <laurentiu.tudor@nxp.com> Cc: Felipe Balbi <balbi@kernel.org> Reviewed-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: Helge Deller <deller@gmx.de> # parisc Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20210723074317.32690-4-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/alpha/kernel/ptrace.c')
0 files changed, 0 insertions, 0 deletions