This is a note to let you know that I've just added the patch titled libfc: Fix fc_exch_recv_req() error path to the 4.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: libfc-fix-fc_exch_recv_req-error-path.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From f6979adeaab578f8ca14fdd32b06ddee0d9d3314 Mon Sep 17 00:00:00 2001 From: Bart Van Assche <bart.vanassche@xxxxxxxxxxx> Date: Fri, 5 Jun 2015 14:20:46 -0700 Subject: libfc: Fix fc_exch_recv_req() error path From: Bart Van Assche <bart.vanassche@xxxxxxxxxxx> commit f6979adeaab578f8ca14fdd32b06ddee0d9d3314 upstream. Due to patch "libfc: Do not invoke the response handler after fc_exch_done()" (commit ID 7030fd62) the lport_recv() call in fc_exch_recv_req() is passed a dangling pointer. Avoid this by moving the fc_frame_free() call from fc_invoke_resp() to its callers. This patch fixes the following crash: general protection fault: 0000 [#3] PREEMPT SMP RIP: fc_lport_recv_req+0x72/0x280 [libfc] Call Trace: fc_exch_recv+0x642/0xde0 [libfc] fcoe_percpu_receive_thread+0x46a/0x5ed [fcoe] kthread+0x10a/0x120 ret_from_fork+0x42/0x70 Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx> Signed-off-by: Vasu Dev <vasu.dev@xxxxxxxxx> Signed-off-by: James Bottomley <JBottomley@xxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/scsi/libfc/fc_exch.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/drivers/scsi/libfc/fc_exch.c +++ b/drivers/scsi/libfc/fc_exch.c @@ -733,8 +733,6 @@ static bool fc_invoke_resp(struct fc_exc if (resp) { resp(sp, fp, arg); res = true; - } else if (!IS_ERR(fp)) { - fc_frame_free(fp); } spin_lock_bh(&ep->ex_lock); @@ -1596,7 +1594,8 @@ static void fc_exch_recv_seq_resp(struct * If new exch resp handler is valid then call that * first. */ - fc_invoke_resp(ep, sp, fp); + if (!fc_invoke_resp(ep, sp, fp)) + fc_frame_free(fp); fc_exch_release(ep); return; @@ -1695,7 +1694,8 @@ static void fc_exch_abts_resp(struct fc_ fc_exch_hold(ep); if (!rc) fc_exch_delete(ep); - fc_invoke_resp(ep, sp, fp); + if (!fc_invoke_resp(ep, sp, fp)) + fc_frame_free(fp); if (has_rec) fc_exch_timer_set(ep, ep->r_a_tov); fc_exch_release(ep); Patches currently in stable-queue which might be from bart.vanassche@xxxxxxxxxxx are queue-4.1/libfc-fix-fc_fcp_cleanup_each_cmd.patch queue-4.1/libfc-fix-fc_exch_recv_req-error-path.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html