From: Giedrius Statkevičius Date: Thu, 9 Apr 2015 23:42:30 +0000 (+0300) Subject: staging: dgnc: don't forget to check if ->channels[i] is NULL in dgnc_tty_uninit() X-Git-Tag: firefly_0821_release~176^2~1545^2~913 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ce2927e9a3b325b92acfeab66632f9a38d572722;p=firefly-linux-kernel-4.4.55.git staging: dgnc: don't forget to check if ->channels[i] is NULL in dgnc_tty_uninit() Add a check if ->channels[i] is NULL because a NULL pointer may be dereferenced in case one of the allocations failed Reported-by: Dan Carpenter Signed-off-by: Giedrius Statkevičius Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c index a8c88f829e42..6c9261cb88ec 100644 --- a/drivers/staging/dgnc/dgnc_tty.c +++ b/drivers/staging/dgnc/dgnc_tty.c @@ -403,7 +403,9 @@ void dgnc_tty_uninit(struct dgnc_board *brd) dgnc_BoardsByMajor[brd->SerialDriver.major] = NULL; brd->dgnc_Serial_Major = 0; for (i = 0; i < brd->nasync; i++) { - dgnc_remove_tty_sysfs(brd->channels[i]->ch_tun.un_sysfs); + if (brd->channels[i]) + dgnc_remove_tty_sysfs(brd->channels[i]-> + ch_tun.un_sysfs); tty_unregister_device(&brd->SerialDriver, i); } tty_unregister_driver(&brd->SerialDriver); @@ -414,7 +416,9 @@ void dgnc_tty_uninit(struct dgnc_board *brd) dgnc_BoardsByMajor[brd->PrintDriver.major] = NULL; brd->dgnc_TransparentPrint_Major = 0; for (i = 0; i < brd->nasync; i++) { - dgnc_remove_tty_sysfs(brd->channels[i]->ch_pun.un_sysfs); + if (brd->channels[i]) + dgnc_remove_tty_sysfs(brd->channels[i]-> + ch_pun.un_sysfs); tty_unregister_device(&brd->PrintDriver, i); } tty_unregister_driver(&brd->PrintDriver);