xnu-1504.7.4.tar.gz

[apple/xnu.git] / bsd / kern / kern_malloc.c

diff --git a/bsd/kern/kern_malloc.c b/bsd/kern/kern_malloc.c
index a1c8f1b5084dbc7d461566c075497c6d969953ff..d2fa09c7719a9cb57ff320845ea134b123c456a8 100644 (file)
--- a/bsd/kern/kern_malloc.c
+++ b/bsd/kern/kern_malloc.c
@@ -96,10 +96,7 @@
 #include <sys/resourcevar.h>
 #include <sys/signalvar.h>
 
 #include <sys/resourcevar.h>
 #include <sys/signalvar.h>
 

-#include <ufs/ufs/inode.h>
-

 #include <hfs/hfs_cnode.h>
 #include <hfs/hfs_cnode.h>

-#include <isofs/cd9660/cd9660_node.h>

 
 #include <miscfs/specfs/specdev.h>
 
 
 #include <miscfs/specfs/specdev.h>
 


@@ -165,11 +162,7 @@ const char *memname[] = {
 #else
        "",                             /* 27 M_DQUOT */ 
 #endif
 #else
        "",                             /* 27 M_DQUOT */ 
 #endif

-#if FFS
-       "UFS mount",    /* 28 M_UFSMNT */ 
-#else

        "",                             /* 28 M_UFSMNT */ 
        "",                             /* 28 M_UFSMNT */ 

-#endif

 #if (SYSV_SEM || SYSV_MSG || SYSV_SHM)
        "shm",                  /* 29 M_SHM */ 
 #else
 #if (SYSV_SEM || SYSV_MSG || SYSV_SHM)
        "shm",                  /* 29 M_SHM */ 
 #else


@@ -190,11 +183,7 @@ const char *memname[] = {
        "pstats",               /* 42 M_SUBPROC */ 
        "LFS segment",  /* 43 M_SEGMENT */ 
        "LFS node",             /* 44 M_LFSNODE */ 
        "pstats",               /* 42 M_SUBPROC */ 
        "LFS segment",  /* 43 M_SEGMENT */ 
        "LFS node",             /* 44 M_LFSNODE */ 

-#if FFS
-       "FFS node",             /* 45 M_FFSNODE */ 
-#else

        "",                             /* 45 M_FFSNODE */ 
        "",                             /* 45 M_FFSNODE */ 

-#endif

        "MFS node",             /* 46 M_MFSNODE */ 
        "NQNFS Lease",  /* 47 M_NQLEASE */ 
        "NQNFS Host",   /* 48 M_NQMHOST */ 
        "MFS node",             /* 46 M_MFSNODE */ 
        "NQNFS Lease",  /* 47 M_NQLEASE */ 
        "NQNFS Host",   /* 48 M_NQMHOST */ 


@@ -212,13 +201,8 @@ const char *memname[] = {
        "in_multi",             /* 54 M_IPMADDR */ 
        "ether_multi",  /* 55 M_IFMADDR */ 
        "mrt",                  /* 56 M_MRTABLE */ 
        "in_multi",             /* 54 M_IPMADDR */ 
        "ether_multi",  /* 55 M_IFMADDR */ 
        "mrt",                  /* 56 M_MRTABLE */ 

-#if CD9660
-       "ISOFS mount",  /* 57 M_ISOFSMNT */ 
-       "ISOFS node",   /* 58 M_ISOFSNODE */ 
-#else
-       "",                             /* 57 M_ISOFSMNT */ 
-       "",                             /* 58 M_ISOFSNODE */ 
-#endif
+       "",             /* 57 unused entry */ 
+       "",             /* 58 unused entry */ 

 #if (NFSCLIENT || NFSSERVER)
        "NFSV3 srvdesc",/* 59 M_NFSRVDESC */ 
        "NFSV3 diroff", /* 60 M_NFSDIROFF */ 
 #if (NFSCLIENT || NFSSERVER)
        "NFSV3 srvdesc",/* 59 M_NFSRVDESC */ 
        "NFSV3 diroff", /* 60 M_NFSDIROFF */ 


@@ -289,7 +273,11 @@ const char *memname[] = {
        "fileglob",             /* 99 M_FILEGLOB */ 
        "kauth",                /* 100 M_KAUTH */ 
        "dummynet",             /* 101 M_DUMMYNET */ 
        "fileglob",             /* 99 M_FILEGLOB */ 
        "kauth",                /* 100 M_KAUTH */ 
        "dummynet",             /* 101 M_DUMMYNET */ 

+#ifndef __LP64__

        "unsafe_fsnode",        /* 102 M_UNSAFEFS */ 
        "unsafe_fsnode",        /* 102 M_UNSAFEFS */ 

+#else
+       "",                     /* 102 M_UNSAFEFS */ 
+#endif /* __LP64__ */

        "macpipelabel", /* 103 M_MACPIPELABEL */
        "mactemp",      /* 104 M_MACTEMP */
        "sbuf",         /* 105 M_SBUF */
        "macpipelabel", /* 103 M_MACPIPELABEL */
        "mactemp",      /* 104 M_MACTEMP */
        "sbuf",         /* 105 M_SBUF */


@@ -300,6 +288,11 @@ const char *memname[] = {
 #else
        "", /* 108 M_TRAFFIC_MGT */
 #endif
 #else
        "", /* 108 M_TRAFFIC_MGT */
 #endif

+#if HFS_COMPRESSION
+       "decmpfs_cnode",/* 109 M_DECMPFS_CNODE */
+#else
+       "",             /* 109 M_DECMPFS_CNODE */
+#endif /* HFS_COMPRESSION */

 };
 
 /* for use with kmzones.kz_zalloczone */
 };
 
 /* for use with kmzones.kz_zalloczone */


@@ -333,7 +326,7 @@ struct kmzones {
        { SOS(ucred),   KMZ_CREATEZONE },       /* 16 M_CRED */
        { SOS(pgrp),    KMZ_CREATEZONE },       /* 17 M_PGRP */
        { SOS(session), KMZ_CREATEZONE },       /* 18 M_SESSION */
        { SOS(ucred),   KMZ_CREATEZONE },       /* 16 M_CRED */
        { SOS(pgrp),    KMZ_CREATEZONE },       /* 17 M_PGRP */
        { SOS(session), KMZ_CREATEZONE },       /* 18 M_SESSION */

-       { SOS(iovec_32),        KMZ_LOOKUPZONE },       /* 19 M_IOV32 */
+       { SOS(user32_iovec),    KMZ_LOOKUPZONE },       /* 19 M_IOV32 */

        { SOS(mount),   KMZ_CREATEZONE },       /* 20 M_MOUNT */
        { 0,            KMZ_MALLOC },           /* 21 M_FHANDLE */
 #if (NFSCLIENT || NFSSERVER)
        { SOS(mount),   KMZ_CREATEZONE },       /* 20 M_MOUNT */
        { 0,            KMZ_MALLOC },           /* 21 M_FHANDLE */
 #if (NFSCLIENT || NFSSERVER)


@@ -352,11 +345,7 @@ struct kmzones {
 #else
        { 0,            KMZ_MALLOC },           /* 27 M_DQUOT */
 #endif
 #else
        { 0,            KMZ_MALLOC },           /* 27 M_DQUOT */
 #endif

-#if FFS
-       { SOX(ufsmount),        KMZ_LOOKUPZONE },       /* 28 M_UFSMNT */
-#else

        { 0,            KMZ_MALLOC },           /* 28 M_UFSMNT */
        { 0,            KMZ_MALLOC },           /* 28 M_UFSMNT */

-#endif

        { 0,            KMZ_MALLOC },           /* 29 M_CGSUM */
        { SOS(plimit),  KMZ_CREATEZONE },       /* 30 M_PLIMIT */
        { SOS(sigacts), KMZ_CREATEZONE },       /* 31 M_SIGACTS */
        { 0,            KMZ_MALLOC },           /* 29 M_CGSUM */
        { SOS(plimit),  KMZ_CREATEZONE },       /* 30 M_PLIMIT */
        { SOS(sigacts), KMZ_CREATEZONE },       /* 31 M_SIGACTS */


@@ -373,11 +362,7 @@ struct kmzones {
        { SOS(pstats),  KMZ_CREATEZONE },       /* 42 M_PSTATS */
        { 0,            KMZ_MALLOC },           /* 43 M_SEGMENT */
        { M_FFSNODE,    KMZ_SHAREZONE },        /* 44 M_LFSNODE */
        { SOS(pstats),  KMZ_CREATEZONE },       /* 42 M_PSTATS */
        { 0,            KMZ_MALLOC },           /* 43 M_SEGMENT */
        { M_FFSNODE,    KMZ_SHAREZONE },        /* 44 M_LFSNODE */

-#if FFS
-       { SOS(inode),   KMZ_CREATEZONE },       /* 45 M_FFSNODE */
-#else

        { 0,            KMZ_MALLOC },           /* 45 M_FFSNODE */
        { 0,            KMZ_MALLOC },           /* 45 M_FFSNODE */

-#endif

        { M_FFSNODE,    KMZ_SHAREZONE },        /* 46 M_MFSNODE */
        { 0,            KMZ_MALLOC },           /* 47 M_NQLEASE */
        { 0,            KMZ_MALLOC },           /* 48 M_NQMHOST */
        { M_FFSNODE,    KMZ_SHAREZONE },        /* 46 M_MFSNODE */
        { 0,            KMZ_MALLOC },           /* 47 M_NQLEASE */
        { 0,            KMZ_MALLOC },           /* 48 M_NQMHOST */


@@ -399,13 +384,8 @@ struct kmzones {
        { SOX(ether_multi),
                        KMZ_LOOKUPZONE },       /* 55 M_IFMADDR */
        { SOX(mrt),     KMZ_CREATEZONE },       /* 56 M_MRTABLE */
        { SOX(ether_multi),
                        KMZ_LOOKUPZONE },       /* 55 M_IFMADDR */
        { SOX(mrt),     KMZ_CREATEZONE },       /* 56 M_MRTABLE */

-#if CD9660
-       { SOX(iso_mnt), KMZ_LOOKUPZONE },       /* 57 M_ISOFSMNT */
-       { SOS(iso_node),        KMZ_CREATEZONE },       /* 58 M_ISOFSNODE */
-#else
-       { 0,            KMZ_MALLOC },           /* 57 M_ISOFSMNT */
-       { 0,            KMZ_MALLOC },           /* 58 M_ISOFSNODE */
-#endif
+       { 0,            KMZ_MALLOC },           /* 57 unused entry */
+       { 0,            KMZ_MALLOC },           /* 58 unused entry */

 #if (NFSCLIENT || NFSSERVER)
        { SOS(nfsrv_descript),
                        KMZ_CREATEZONE },       /* 59 M_NFSRVDESC */
 #if (NFSCLIENT || NFSSERVER)
        { SOS(nfsrv_descript),
                        KMZ_CREATEZONE },       /* 59 M_NFSRVDESC */


@@ -468,17 +448,26 @@ struct kmzones {
 #endif
        { SOS(cl_readahead),  KMZ_CREATEZONE }, /* 96 M_CLRDAHEAD */
        { SOS(cl_writebehind),KMZ_CREATEZONE }, /* 97 M_CLWRBEHIND */
 #endif
        { SOS(cl_readahead),  KMZ_CREATEZONE }, /* 96 M_CLRDAHEAD */
        { SOS(cl_writebehind),KMZ_CREATEZONE }, /* 97 M_CLWRBEHIND */

-       { SOS(iovec_64),        KMZ_LOOKUPZONE },       /* 98 M_IOV64 */
+       { SOS(user64_iovec),    KMZ_LOOKUPZONE },       /* 98 M_IOV64 */

        { SOS(fileglob),        KMZ_CREATEZONE },       /* 99 M_FILEGLOB */
        { 0,            KMZ_MALLOC },           /* 100 M_KAUTH */
        { 0,            KMZ_MALLOC },           /* 101 M_DUMMYNET */
        { SOS(fileglob),        KMZ_CREATEZONE },       /* 99 M_FILEGLOB */
        { 0,            KMZ_MALLOC },           /* 100 M_KAUTH */
        { 0,            KMZ_MALLOC },           /* 101 M_DUMMYNET */

+#ifndef __LP64__

        { SOS(unsafe_fsnode),KMZ_CREATEZONE },  /* 102 M_UNSAFEFS */
        { SOS(unsafe_fsnode),KMZ_CREATEZONE },  /* 102 M_UNSAFEFS */

+#else 
+       { 0,            KMZ_MALLOC },           /* 102 M_UNSAFEFS */
+#endif /* __LP64__ */

        { 0,            KMZ_MALLOC },           /* 103 M_MACPIPELABEL */
        { 0,            KMZ_MALLOC },           /* 104 M_MACTEMP */
        { 0,            KMZ_MALLOC },           /* 105 M_SBUF */
        { 0,            KMZ_MALLOC },           /* 106 M_HFS_EXTATTR */
        { 0,            KMZ_MALLOC },           /* 107 M_LCTX */
        { 0,            KMZ_MALLOC },           /* 108 M_TRAFFIC_MGT */
        { 0,            KMZ_MALLOC },           /* 103 M_MACPIPELABEL */
        { 0,            KMZ_MALLOC },           /* 104 M_MACTEMP */
        { 0,            KMZ_MALLOC },           /* 105 M_SBUF */
        { 0,            KMZ_MALLOC },           /* 106 M_HFS_EXTATTR */
        { 0,            KMZ_MALLOC },           /* 107 M_LCTX */
        { 0,            KMZ_MALLOC },           /* 108 M_TRAFFIC_MGT */

+#if HFS_COMPRESSION
+       { SOS(decmpfs_cnode),KMZ_CREATEZONE },  /* 109 M_DECMPFS_CNODE */
+#else
+       { 0,            KMZ_MALLOC },           /* 109 M_DECMPFS_CNODE */
+#endif /* HFS_COMPRESSION */

 #undef SOS
 #undef SOX
 };
 #undef SOS
 #undef SOX
 };


@@ -564,6 +553,21 @@ _MALLOC(
                mem = (void *)kalloc_noblock(memsize);
        } else {
                mem = (void *)kalloc(memsize);
                mem = (void *)kalloc_noblock(memsize);
        } else {
                mem = (void *)kalloc(memsize);

+
+               if (mem == NULL) {
+
+                       /*
+                        * We get here when the caller told us to block waiting for memory, but
+                        * kalloc said there's no memory left to get.  Generally, this means there's a 
+                        * leak or the caller asked for an impossibly large amount of memory.  Since there's
+                        * nothing left to wait for and the caller isn't expecting a NULL return code, we
+                        * just panic.  This is less than ideal, but returning NULL doesn't help since the
+                        * majority of callers don't check the return value and will just dereference the pointer and
+                        * trap anyway.  We may as well get a more descriptive message out while we can.
+                        */
+
+                       panic("_MALLOC: kalloc returned NULL (potential leak), size %llu", (uint64_t) size);
+               }

        }
        if (!mem)
                return (0);
        }
        if (!mem)
                return (0);