Hello, The following program triggers WARNING in kmalloc: // autogenerated by syzkaller (http://github.com/google/syzkaller) #include <sys/types.h> #include <sys/socket.h> #include <linux/socket.h> #include <linux/in.h> #define SOL_SCTP 132 #define SCTP_GET_LOCAL_ADDRS 109 int main() { int fd = socket(PF_INET, SOCK_SEQPACKET, IPPROTO_SCTP); char buf[256]; int len = 0x04000000; getsockopt(fd, SOL_SCTP, SCTP_GET_LOCAL_ADDRS, &buf, &len); return 0; } ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6006 at mm/page_alloc.c:2989 __alloc_pages_nodemask+0x695/0x14e0() Modules linked in: CPU: 0 PID: 6006 Comm: executor Not tainted 4.4.0-rc2+ #3 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 00000000ffffffff ffff880033887720 ffffffff82719fc6 0000000000000000 ffff8800338c2d80 ffffffff85a62a20 ffff880033887760 ffffffff81244ec9 ffffffff8154e3e5 ffffffff85a62a20 0000000000000bad 0000000000000000 Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff82719fc6>] dump_stack+0x68/0x92 lib/dump_stack.c:50 [<ffffffff81244ec9>] warn_slowpath_common+0xd9/0x140 kernel/panic.c:460 [<ffffffff812450f9>] warn_slowpath_null+0x29/0x30 kernel/panic.c:493 [< inline >] __alloc_pages_slowpath mm/page_alloc.c:2989 [<ffffffff8154e3e5>] __alloc_pages_nodemask+0x695/0x14e0 mm/page_alloc.c:3235 [<ffffffff8160ceee>] alloc_pages_current+0xee/0x340 mm/mempolicy.c:2055 [< inline >] alloc_pages include/linux/gfp.h:451 [<ffffffff81549c56>] alloc_kmem_pages+0x16/0xf0 mm/page_alloc.c:3414 [<ffffffff81595e79>] kmalloc_order+0x19/0x60 mm/slab_common.c:1007 [<ffffffff81595edf>] kmalloc_order_trace+0x1f/0xa0 mm/slab_common.c:1018 [< inline >] kmalloc_large include/linux/slab.h:390 [<ffffffff8161bd74>] __kmalloc+0x234/0x250 mm/slub.c:3525 [< inline >] kmalloc include/linux/slab.h:463 [< inline >] sctp_getsockopt_local_addrs net/sctp/socket.c:4931 [<ffffffff854d9730>] sctp_getsockopt+0x11b0/0x3e00 net/sctp/socket.c:6007 [<ffffffff84913ad5>] sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2604 [< inline >] SYSC_getsockopt net/socket.c:1788 [<ffffffff84911282>] SyS_getsockopt+0x142/0x230 net/socket.c:1770 [<ffffffff859551f6>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185 ---[ end trace 42716df2ed49f73e ]--- On commit 78c4a49a69e910a162b05e4e8727b9bdbf948f13 (Nov 25). -- To unsubscribe from this list: send the line "unsubscribe linux-sctp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
