From: Philipp Zabel Date: Wed, 22 Oct 2014 14:34:35 +0000 (+0200) Subject: net: fec: ptp: fix NULL pointer dereference if ptp_clock is not set X-Git-Tag: omap-for-v3.19/fixes-not-urgent-part1~25^2~45 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=81f35ffde0e95ee18de83646bbf93dda55d9cc8b;p=pandora-kernel.git net: fec: ptp: fix NULL pointer dereference if ptp_clock is not set Since commit 278d24047891 (net: fec: ptp: Enable PPS output based on ptp clock) fec_enet_interrupt calls fec_ptp_check_pps_event unconditionally, which calls into ptp_clock_event. If fep->ptp_clock is NULL, ptp_clock_event tries to dereference the NULL pointer. Since on i.MX53 fep->bufdesc_ex is not set, fec_ptp_init is never called, and fep->ptp_clock is NULL, which reliably causes a kernel panic. This patch adds a check for fep->ptp_clock == NULL in fec_enet_interrupt. Signed-off-by: Philipp Zabel Signed-off-by: David S. Miller --- Reading git-diff-tree failed