/* Copyright (c) 2016 Sargun Dhillon * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. */ #define _GNU_SOURCE #include #include #include #include "libbpf.h" #include "bpf_load.h" #include #include "cgroup_helpers.h" #define CGROUP_PATH "/my-cgroup" int main(int argc, char **argv) { pid_t remote_pid, local_pid = getpid(); int cg2, idx = 0, rc = 0; char filename[256]; snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); if (load_bpf_file(filename)) { printf("%s", bpf_log_buf); return 1; } if (setup_cgroup_environment()) goto err; cg2 = create_and_get_cgroup(CGROUP_PATH); if (!cg2) goto err; if (bpf_map_update_elem(map_fd[0], &idx, &cg2, BPF_ANY)) { log_err("Adding target cgroup to map"); goto err; } if (join_cgroup(CGROUP_PATH)) goto err; /* * The installed helper program catched the sync call, and should * write it to the map. */ sync(); bpf_map_lookup_elem(map_fd[1], &idx, &remote_pid); if (local_pid != remote_pid) { fprintf(stderr, "BPF Helper didn't write correct PID to map, but: %d\n", remote_pid); goto err; } /* Verify the negative scenario; leave the cgroup */ if (join_cgroup("/")) goto err; remote_pid = 0; bpf_map_update_elem(map_fd[1], &idx, &remote_pid, BPF_ANY); sync(); bpf_map_lookup_elem(map_fd[1], &idx, &remote_pid); if (local_pid == remote_pid) { fprintf(stderr, "BPF cgroup negative test did not work\n"); goto err; } goto out; err: rc = 1; out: close(cg2); cleanup_cgroup_environment(); return rc; } c?id=d1908f52557b3230fbd63c0429f3b4b748bf2b6d'>treecommitdiff
path: root/drivers/usb/dwc3/core.c
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authorChristoph Hellwig <hch@lst.de>2017-01-30 13:15:41 +0100
committerBjorn Helgaas <bhelgaas@google.com>2017-02-02 10:35:46 -0600
commitdfef358bd1beb4e7b5c94eca944be9cd23dfc752 (patch)
treeb9a2afb38a4c2ac8ad31f49ec0d71fe9e5b1994c /net/batman-adv/routing.c
parent030305d69fc6963c16003f50d7e8d74b02d0a143 (diff)
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ affinity code, which we root caused to the qla2xxx driver assigning all its MSI-X vectors to the pre and post vectors, and not having any left for the actually spread IRQs. Fix this issue by not asking for affinity assignment when there are no vectors to assign left. Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()") Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com Reported-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'net/batman-adv/routing.c')