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/*
 * Subject to the GPL, version 2.
 */

#include "xmalloc.h"

struct panic_handler {
	void *arg;
	pid_t pid;
	bool is_enabled;
	void (*on_panic)(void *arg);
	struct panic_handler *next;
};

static struct panic_handler *panic_handlers;

void panic_handler_add(void (*on_panic)(void *arg), void *arg)
{
	struct panic_handler *handler = xmallocz(sizeof(*handler));

	handler->arg		= arg;
	handler->pid		= getpid();
	handler->is_enabled	= true;
	handler->on_panic	= on_panic;
	handler->next		= panic_handlers;
	panic_handlers		= handler;
};

void call_panic_handlers(void)
{
	struct panic_handler *it;
	pid_t pid = getpid();

	for (it = panic_handlers; it; it = it->next) {
		if (it->pid == pid && it->is_enabled) {
			it->is_enabled = false;
			it->on_panic(it->arg);
		}
	}
}
inux/net-next.git/patch/net/ceph/crush?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>patch) tree37ff0410d130cfe77185f591b07cd6403f207f0c /net/ceph/crush parent7ce7d89f48834cefece7804d38fc5d85382edf77 (diff)
crypto: testmgr - Use heap buffer for acomp test input
Christopher Covington reported a crash on aarch64 on recent Fedora kernels: kernel BUG at ./include/linux/scatterlist.h:140! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP Modules linked in: CPU: 2 PID: 752 Comm: cryptomgr_test Not tainted 4.9.0-11815-ge93b1cc #162 Hardware name: linux,dummy-virt (DT) task: ffff80007c650080 task.stack: ffff800008910000 PC is at sg_init_one+0xa0/0xb8 LR is at sg_init_one+0x24/0xb8 ... [<ffff000008398db8>] sg_init_one+0xa0/0xb8 [<ffff000008350a44>] test_acomp+0x10c/0x438 [<ffff000008350e20>] alg_test_comp+0xb0/0x118 [<ffff00000834f28c>] alg_test+0x17c/0x2f0 [<ffff00000834c6a4>] cryptomgr_test+0x44/0x50 [<ffff0000080dac70>] kthread+0xf8/0x128 [<ffff000008082ec0>] ret_from_fork+0x10/0x50 The test vectors used for input are part of the kernel image. These inputs are passed as a buffer to sg_init_one which eventually blows up with BUG_ON(!virt_addr_valid(buf)). On arm64, virt_addr_valid returns false for the kernel image since virt_to_page will not return the correct page. Fix this by copying the input vectors to heap buffer before setting up the scatterlist. Reported-by: Christopher Covington <cov@codeaurora.org> Fixes: d7db7a882deb ("crypto: acomp - update testmgr with support for acomp") Signed-off-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'net/ceph/crush')