* top stack users for 2.5.73
@ 2003-06-25 16:33 Jörn Engel
2003-06-25 20:38 ` [PATCH] intermezzo stack lossage (was Re: top stack users for 2.5.73) Muli Ben-Yehuda
2003-07-06 16:16 ` top stack users for 2.5.74 Jörn Engel
0 siblings, 2 replies; 4+ messages in thread
From: Jörn Engel @ 2003-06-25 16:33 UTC (permalink / raw)
To: linux-kernel
44 functions for 2.5.67.
45 functions for 2.5.68
41 functions for 2.5.69
36 functions for 2.5.70
32 functions for 2.5.71
29 functions for 2.5.73
Mostly harmless. :)
Five functions dropped below the threshold of 1k, two grew a bit above
it. Most functions tended to loose a couple of bytes, so in general
there was some improvement.
P 0xc0204c1b presto_get_fileid: sub $0x116c,%esp
P 0xc020378b presto_copy_kml_tail: sub $0x1018,%esp
0xc07ffd83 ide_unregister: sub $0x95c,%esp
0xc07699bb w9966_v4l_read: sub $0x81c,%esp
0xc0c8096b snd_emu10k1_fx8010_ioctl: sub $0x818,%esp
0xc0c25a57 snd_cmipci_ac3_copy: sub $0x7a4,%esp
0xc0c25ffb snd_cmipci_ac3_silence: sub $0x79c,%esp
0xc029b90b dohash: sub $0x5c4,%esp
0xc0105543 huft_build: sub $0x5b0,%esp
0xc01070d3 huft_build: sub $0x5b0,%esp
0xc0107f27 inflate_dynamic: sub $0x538,%esp
0xc0106387 inflate_dynamic: sub $0x528,%esp
0xc0c7c5b3 snd_emu10k1_add_controls: sub $0x4dc,%esp
0xc01fb563 presto_ioctl: sub $0x4cc,%esp
0xc0c9d2cf snd_trident_mixer: sub $0x4a4,%esp
0xc0106217 inflate_fixed: sub $0x490,%esp
0xc0107dbb inflate_fixed: sub $0x490,%esp
0xc081319b ide_config: sub $0x47c,%esp
0xc0534693 parport_config: sub $0x460,%esp
0xc0abbccf ixj_config: sub $0x460,%esp
0xc0e39d03 gss_pipe_downcall: sub $0x42c,%esp
0xc0a16c73 isd200_action: sub $0x428,%esp
0xc03f9ce3 sha512_transform: sub $0x418,%esp
0xc06d7053 arlan_sysctl_info: sub $0x414,%esp
0xc035b51b ciGetLeafPrefixKey: sub $0x410,%esp
0xc163bc9f root_nfs_name: sub $0x408,%esp
0xc03e96b3 befs_error: sub $0x400,%esp
0xc03e96ff befs_warning: sub $0x400,%esp
0xc03e974b befs_debug: sub $0x400,%esp
Jörn
--
"Security vulnerabilities are here to stay."
-- Scott Culp, Manager of the Microsoft Security Response Center, 2001
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] intermezzo stack lossage (was Re: top stack users for 2.5.73)
2003-06-25 16:33 top stack users for 2.5.73 Jörn Engel
@ 2003-06-25 20:38 ` Muli Ben-Yehuda
2003-07-06 16:16 ` top stack users for 2.5.74 Jörn Engel
1 sibling, 0 replies; 4+ messages in thread
From: Muli Ben-Yehuda @ 2003-06-25 20:38 UTC (permalink / raw)
To: J?rn Engel; +Cc: linux-kernel, William Lee Irwin III, intermezzo-devel
[-- Attachment #1: Type: text/plain, Size: 21735 bytes --]
On Wed, Jun 25, 2003 at 06:33:22PM +0200, J?rn Engel wrote:
> 0xc0204c1b presto_get_fileid: sub $0x116c,%esp
> 0xc020378b presto_copy_kml_tail: sub $0x1018,%esp
> 0xc01fb563 presto_ioctl: sub $0x4cc,%esp
Here's a patch for these three. Compiled, but not tested, as I don't
have intermezzo set up. No fancy games, just replace humongous stack
allocation with dynamic allocation. This isn't as clean as it could
be, but I went for minimal changes to core intermezzo code. Before
embarking on any major cleanups, I'd like to hear from the intermezzo
maintainers what are their plans wrt 2.5 first. For the time being,
here are a couple of issues that I noticed with the code now:
1. presto_finish_kml_truncate does not appear to be called from
anywhere? if it is, and is indeed called with the
fset->fset_kml.fd_lock taken, as the comment above it says, it mustn't
call anything that does non-atomic allocations, such as
izo_mak_path().
2. In presto_ioctl(), there the code calls a function which can return
0, treats that 0 as an error, and then returns 0 itself. Is this
intentional or a bug?
diff -Naur --exclude-from=/home/mulix/dontdiff linux-2.5/fs/intermezzo/dir.c linux-2.5.73-stack-lusers/fs/intermezzo/dir.c
--- linux-2.5/fs/intermezzo/dir.c 2003-03-22 04:25:29.000000000 +0200
+++ linux-2.5.73-stack-lusers/fs/intermezzo/dir.c 2003-06-25 23:02:34.000000000 +0300
@@ -877,17 +877,19 @@
int presto_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- char buf[1024];
struct izo_ioctl_data *data = NULL;
struct presto_dentry_data *dd;
int rc;
+ char* buf;
+ static const size_t bufsz = 1024;
ENTRY;
/* Try the filesystem's ioctl first, and return if it succeeded. */
dd = presto_d2d(file->f_dentry);
if (dd && dd->dd_fset) {
- int (*cache_ioctl)(struct inode *, struct file *, unsigned int, unsigned long ) = filter_c2cdfops(dd->dd_fset->fset_cache->cache_filter)->ioctl;
+ int (*cache_ioctl)(struct inode *, struct file *, unsigned int, unsigned long);
+ cache_ioctl = filter_c2cdfops(dd->dd_fset->fset_cache->cache_filter)->ioctl;
rc = -ENOTTY;
if (cache_ioctl)
rc = cache_ioctl(inode, file, cmd, arg);
@@ -902,47 +904,49 @@
return -EPERM;
}
- memset(buf, 0, sizeof(buf));
-
- if (izo_ioctl_getdata(buf, buf + 1024, (void *)arg)) {
+ /* allocate a zero'd buffer for data */
+ PRESTO_ALLOC(buf, bufsz);
+ if (!buf) {
+ EXIT;
+ return -ENOMEM;
+ }
+
+ if (izo_ioctl_getdata(buf, buf + bufsz, (void *)arg)) {
CERROR("intermezzo ioctl: data error\n");
- return -EINVAL;
+ rc = -EINVAL;
+ goto done;
}
data = (struct izo_ioctl_data *)buf;
switch(cmd) {
case IZO_IOC_REINTKML: {
- int rc;
int cperr;
rc = kml_reint_rec(file, data);
- EXIT;
cperr = copy_to_user((char *)arg, data, sizeof(*data));
if (cperr) {
CERROR("WARNING: cperr %d\n", cperr);
rc = -EFAULT;
}
- return rc;
+ goto done;
}
case IZO_IOC_GET_RCVD: {
struct izo_rcvd_rec rec;
struct presto_file_set *fset;
- int rc;
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
- }
+ rc = -ENODEV;
+ goto done;
+ }
+
rc = izo_rcvd_get(&rec, fset, data->ioc_uuid);
- if (rc < 0) {
- EXIT;
- return rc;
- }
+ if (rc < 0)
+ goto done;
- EXIT;
- return copy_to_user((char *)arg, &rec, sizeof(rec))? -EFAULT : 0;
+ rc = copy_to_user((char *)arg, &rec, sizeof(rec))? -EFAULT : 0;
+ goto done;
}
case IZO_IOC_REPSTATUS: {
@@ -951,12 +955,11 @@
struct izo_rcvd_rec rec;
struct presto_file_set *fset;
int minor;
- int rc;
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
@@ -965,13 +968,11 @@
rc = izo_repstatus(fset, client_kmlsize,
lr_client, &rec);
- if (rc < 0) {
- EXIT;
- return rc;
- }
+ if (rc < 0)
+ goto done;
- EXIT;
- return copy_to_user((char *)arg, &rec, sizeof(rec))? -EFAULT : 0;
+ rc = copy_to_user((char *)arg, &rec, sizeof(rec))? -EFAULT : 0;
+ goto done;
}
case IZO_IOC_GET_CHANNEL: {
@@ -979,30 +980,28 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
data->ioc_dev = fset->fset_cache->cache_psdev->uc_minor;
CDEBUG(D_PSDEV, "CHANNEL %d\n", data->ioc_dev);
- EXIT;
- return copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ rc = copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ goto done;
}
case IZO_IOC_SET_IOCTL_UID:
izo_authorized_uid = data->ioc_uid;
- EXIT;
- return 0;
+ rc = 0;
+ goto done;
case IZO_IOC_SET_PID:
rc = izo_psdev_setpid(data->ioc_dev);
- EXIT;
- return rc;
+ goto done;
case IZO_IOC_SET_CHANNEL:
rc = izo_psdev_setchannel(file, data->ioc_dev);
- EXIT;
- return rc;
+ goto done;
case IZO_IOC_GET_KML_SIZE: {
struct presto_file_set *fset;
@@ -1010,14 +1009,14 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
kmlsize = presto_kml_offset(fset) + fset->fset_kml_logical_off;
- EXIT;
- return copy_to_user((char *)arg, &kmlsize, sizeof(kmlsize))?-EFAULT : 0;
+ rc = copy_to_user((char *)arg, &kmlsize, sizeof(kmlsize))?-EFAULT : 0;
+ goto done;
}
case IZO_IOC_PURGE_FILE_DATA: {
@@ -1025,37 +1024,37 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
rc = izo_purge_file(fset, data->ioc_inlbuf1);
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_GET_FILEID: {
rc = izo_get_fileid(file, data);
- EXIT;
if (rc)
- return rc;
- return copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ goto done;
+
+ rc = copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ goto done;
}
case IZO_IOC_SET_FILEID: {
rc = izo_set_fileid(file, data);
- EXIT;
if (rc)
- return rc;
- return copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ goto done;
+
+ rc = copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ goto done;
}
case IZO_IOC_ADJUST_LML: {
struct lento_vfs_context *info;
info = (struct lento_vfs_context *)data->ioc_inlbuf1;
rc = presto_adjust_lml(file, info);
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_CONNECT: {
@@ -1064,16 +1063,15 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
rc = izo_upc_connect(minor, data->ioc_ino,
data->ioc_generation, data->ioc_uuid,
data->ioc_flags);
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_GO_FETCH_KML: {
@@ -1082,15 +1080,14 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
rc = izo_upc_go_fetch_kml(minor, fset->fset_name,
data->ioc_uuid, data->ioc_kmlsize);
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_REVOKE_PERMIT:
@@ -1098,26 +1095,23 @@
rc = izo_revoke_permit(file->f_dentry, data->ioc_uuid);
else
rc = izo_revoke_permit(file->f_dentry, NULL);
- EXIT;
- return rc;
+ goto done;
case IZO_IOC_CLEAR_FSET:
rc = izo_clear_fsetroot(file->f_dentry);
- EXIT;
- return rc;
+ goto done;
case IZO_IOC_CLEAR_ALL_FSETS: {
struct presto_file_set *fset;
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
rc = izo_clear_all_fsetroots(fset->fset_cache);
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_SET_FSET:
@@ -1127,9 +1121,7 @@
rc = presto_set_fsetroot_from_ioc(file->f_dentry,
data->ioc_inlbuf1,
data->ioc_flags);
- EXIT;
- return rc;
-
+ goto done;
case IZO_IOC_MARK: {
int res = 0; /* resulting flags - returned to user */
@@ -1185,16 +1177,16 @@
}
if (error) {
- EXIT;
- return error;
+ rc = error;
+ goto done;
}
data->ioc_mark_what = res;
CDEBUG(D_DOWNCALL, "mark inode: %ld, and: %x, or: %x, what %x\n",
file->f_dentry->d_inode->i_ino, data->ioc_and_flag,
data->ioc_or_flag, data->ioc_mark_what);
- EXIT;
- return copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ rc = copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ goto done;
}
#if 0
case IZO_IOC_CLIENT_MAKE_BRANCH: {
@@ -1203,16 +1195,15 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
rc = izo_upc_client_make_branch(minor, fset->fset_name,
data->ioc_inlbuf1,
data->ioc_inlbuf2);
- EXIT;
- return rc;
+ goto done;
}
#endif
case IZO_IOC_SERVER_MAKE_BRANCH: {
@@ -1221,14 +1212,14 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
izo_upc_server_make_branch(minor, data->ioc_inlbuf1);
- EXIT;
- return 0;
+ rc = 0;
+ goto done;
}
case IZO_IOC_SET_KMLSIZE: {
struct presto_file_set *fset;
@@ -1237,38 +1228,33 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
rc = izo_upc_set_kmlsize(minor, fset->fset_name, data->ioc_uuid,
data->ioc_kmlsize);
- if (rc != 0) {
- EXIT;
- return rc;
- }
+ if (rc != 0)
+ goto done;
rc = izo_rcvd_get(&rec, fset, data->ioc_uuid);
if (rc == -EINVAL) {
/* We don't know anything about this uuid yet; no
* worries. */
memset(&rec, 0, sizeof(rec));
- } else if (rc <= 0) {
+ } else if (rc <= 0) { /* do we really want to return 0 if rc == 0 here? */
CERROR("InterMezzo: error reading last_rcvd: %d\n", rc);
- EXIT;
- return rc;
+ goto done;
}
rec.lr_remote_offset = data->ioc_kmlsize;
rc = izo_rcvd_write(fset, &rec);
if (rc <= 0) {
CERROR("InterMezzo: error writing last_rcvd: %d\n", rc);
- EXIT;
- return rc;
+ goto done;
}
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_BRANCH_UNDO: {
struct presto_file_set *fset;
@@ -1276,15 +1262,14 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
rc = izo_upc_branch_undo(minor, fset->fset_name,
data->ioc_inlbuf1);
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_BRANCH_REDO: {
struct presto_file_set *fset;
@@ -1292,28 +1277,33 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
rc = izo_upc_branch_redo(minor, fset->fset_name,
data->ioc_inlbuf1);
- EXIT;
- return rc;
+ goto done;
}
case TCGETS:
- EXIT;
- return -EINVAL;
+ rc = -EINVAL;
+ goto done;
default:
EXIT;
- return -EINVAL;
-
+ rc = -EINVAL;
+ goto done;
+
}
+
+ rc = 0;
+
+ done:
+ PRESTO_FREE(buf, bufsz);
EXIT;
- return 0;
+ return rc;
}
struct file_operations presto_dir_fops = {
diff -Naur --exclude-from=/home/mulix/dontdiff linux-2.5/fs/intermezzo/journal.c linux-2.5.73-stack-lusers/fs/intermezzo/journal.c
--- linux-2.5/fs/intermezzo/journal.c 2002-12-14 03:57:54.000000000 +0200
+++ linux-2.5.73-stack-lusers/fs/intermezzo/journal.c 2003-06-25 23:32:50.000000000 +0300
@@ -1239,12 +1239,16 @@
return izo_rcvd_write(fset, &rec);
}
+/* we are called from presto_finish_kml_truncate, which is called */
+/* with fset->fset_kml.fd_lock held. Allocations must be GFP_ATOMIC */
struct file * presto_copy_kml_tail(struct presto_file_set *fset,
unsigned long int start)
{
struct file *f;
int len;
loff_t read_off, write_off, bytes;
+ char* buf;
+ size_t bufsz;
ENTRY;
@@ -1258,21 +1262,31 @@
write_off = 0;
read_off = start;
bytes = fset->fset_kml.fd_offset - start;
- while (bytes > 0) {
- char buf[4096];
- int toread;
- if (bytes > sizeof(buf))
- toread = sizeof(buf);
- else
- toread = bytes;
+ bufsz = bytes;
+ /* can't use PRESTO_ALLOC - alloction must be atomic */
+ buf = kmalloc(bufsz, GFP_ATOMIC);
+ if (!buf) {
+ CERROR("IZO: out of memory at %s:%d (trying to "
+ "allocate %d)\n", __FILE__, __LINE__,
+ bufsz);
+ filp_close(f, NULL);
+ EXIT;
+ return ERR_PTR(-ENOMEM);
+ }
+
+ presto_kmem_inc(buf, bufsz);
+ memset(buf, 0, bufsz);
- len = presto_fread(fset->fset_kml.fd_file, buf, toread,
+ while (bytes > 0) {
+ len = presto_fread(fset->fset_kml.fd_file, buf, bufsz,
&read_off);
if (len <= 0)
break;
if (presto_fwrite(f, buf, len, &write_off) != len) {
+ kfree(buf);
+ presto_kmem_dec(buf, bufsz);
filp_close(f, NULL);
EXIT;
return ERR_PTR(-EIO);
@@ -1280,7 +1294,9 @@
bytes -= len;
}
-
+
+ kfree(buf);
+ presto_kmem_dec(buf, bufsz);
EXIT;
return f;
}
@@ -1589,11 +1605,12 @@
{
int opcode = KML_OPCODE_GET_FILEID;
struct rec_info rec;
- char *buffer, *path, *logrecord, record[4096]; /*include path*/
+ char *buffer, *path, *logrecord, *record; /*include path*/
struct dentry *root;
__u32 uid, gid, pathlen;
int error, size;
struct kml_suffix *suffix;
+ size_t record_size;
ENTRY;
@@ -1609,9 +1626,13 @@
size_round(le32_to_cpu(pathlen)) +
sizeof(struct kml_suffix);
+ record_size = max(4096, size);
+ error = -ENOMEM;
+ PRESTO_ALLOC(record, record_size);
+ if (!record)
+ goto free_buffer;
+
CDEBUG(D_FILE, "kml size: %d\n", size);
- if ( size > sizeof(record) )
- CERROR("InterMezzo: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
memset(&rec, 0, sizeof(rec));
rec.is_kml = 1;
@@ -1632,6 +1653,9 @@
size_round(le32_to_cpu(pathlen)), path,
fset->fset_name);
+ PRESTO_FREE(record, record_size);
+
+ free_buffer:
BUFF_FREE(buffer);
EXIT;
return error;
--
Muli Ben-Yehuda
http://www.mulix.org
http://www.livejournal.com/~mulix/
[-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]
^ permalink raw reply [flat|nested] 4+ messages in thread
* top stack users for 2.5.74
2003-06-25 16:33 top stack users for 2.5.73 Jörn Engel
2003-06-25 20:38 ` [PATCH] intermezzo stack lossage (was Re: top stack users for 2.5.73) Muli Ben-Yehuda
@ 2003-07-06 16:16 ` Jörn Engel
2003-07-06 16:23 ` Muli Ben-Yehuda
1 sibling, 1 reply; 4+ messages in thread
From: Jörn Engel @ 2003-07-06 16:16 UTC (permalink / raw)
To: linux-kernel
44 functions for 2.5.67
45 functions for 2.5.68
41 functions for 2.5.69
36 functions for 2.5.70
32 functions for 2.5.71
29 functions for 2.5.73
32 functions for 2.5.74
Basically unchanged. In 2.5.73, most functions lost a few bytes and a
couple dropped below the 1k limit, this time most functions gained a
few bytes. sha512_transform and arlan_sysctl_info both improved a
great deal, but others filled the gaps.
0xc02318b6 presto_get_fileid: sub $0x119c,%esp
0xc0230076 presto_copy_kml_tail: sub $0x1028,%esp
0xc0935a08 ide_unregister: sub $0x96c,%esp
0xc0e8c413 snd_emu10k1_fx8010_ioctl: sub $0x830,%esp
0xc0880616 w9966_v4l_read: sub $0x828,%esp
0xc0e1cfab snd_cmipci_ac3_silence: sub $0x7c0,%esp
0xc0e1c9f6 snd_cmipci_ac3_copy: sub $0x7b8,%esp
0xc0105650 huft_build: sub $0x59c,%esp
0xc01073d0 huft_build: sub $0x59c,%esp
0xc02e4396 dohash: sub $0x594,%esp
0xc0108256 inflate_dynamic: sub $0x554,%esp
0xc01064a6 inflate_dynamic: sub $0x538,%esp
0xc0226096 presto_ioctl: sub $0x504,%esp
0xc0e866ba snd_emu10k1_add_controls: sub $0x4dc,%esp
0xc0eae4d6 snd_trident_mixer: sub $0x4c0,%esp
0xc0106307 inflate_fixed: sub $0x4ac,%esp
0xc01080b7 inflate_fixed: sub $0x4ac,%esp
0xc094ca11 ide_config: sub $0x4a8,%esp
0xc05e9f7c parport_config: sub $0x490,%esp
0xc0c6ffb3 ixj_config: sub $0x484,%esp
0xc0ba9ae0 isd200_action: sub $0x454,%esp
0xc109a21e gss_pipe_downcall: sub $0x44c,%esp
0xc03c1a68 ciGetLeafPrefixKey: sub $0x428,%esp
0xc0468c73 befs_error: sub $0x418,%esp
0xc0468ce3 befs_warning: sub $0x418,%esp
0xc0468d53 befs_debug: sub $0x418,%esp
0xc07dbde6 wv_hw_reset: sub $0x418,%esp
0xc16e0915 root_nfs_name: sub $0x414,%esp
0xc0c93a12 bt3c_config: sub $0x410,%esp
0xc0c97b32 btuart_config: sub $0x410,%esp
0xc0c91fef dtl1_config: sub $0x408,%esp
0xc0c95e06 bluecard_config: sub $0x408,%esp
Jörn
--
Victory in war is not repetitious.
-- Sun Tzu
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: top stack users for 2.5.74
2003-07-06 16:16 ` top stack users for 2.5.74 Jörn Engel
@ 2003-07-06 16:23 ` Muli Ben-Yehuda
0 siblings, 0 replies; 4+ messages in thread
From: Muli Ben-Yehuda @ 2003-07-06 16:23 UTC (permalink / raw)
To: J?rn Engel; +Cc: linux-kernel
[-- Attachment #1: Type: text/plain, Size: 21082 bytes --]
On Sun, Jul 06, 2003 at 06:16:54PM +0200, J?rn Engel wrote:
> 0xc02318b6 presto_get_fileid: sub $0x119c,%esp
> 0xc0230076 presto_copy_kml_tail: sub $0x1028,%esp
> 0xc0226096 presto_ioctl: sub $0x504,%esp
Attached is the patch for these three. The intermezzo maintainers are
integrating it and should push it to Linus eventually, but if anyone
wants it until then...
Patch against 2.5.73, applies with a one line fuzz to
2.5.74. Compiles, not tested.
diff -Naur --exclude-from=/home/mulix/dontdiff linux-2.5/fs/intermezzo/dir.c linux-2.5.73-stack-lusers/fs/intermezzo/dir.c
--- linux-2.5/fs/intermezzo/dir.c 2003-03-22 04:25:29.000000000 +0200
+++ linux-2.5.73-stack-lusers/fs/intermezzo/dir.c 2003-06-25 23:02:34.000000000 +0300
@@ -877,17 +877,19 @@
int presto_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- char buf[1024];
struct izo_ioctl_data *data = NULL;
struct presto_dentry_data *dd;
int rc;
+ char* buf;
+ static const size_t bufsz = 1024;
ENTRY;
/* Try the filesystem's ioctl first, and return if it succeeded. */
dd = presto_d2d(file->f_dentry);
if (dd && dd->dd_fset) {
- int (*cache_ioctl)(struct inode *, struct file *, unsigned int, unsigned long ) = filter_c2cdfops(dd->dd_fset->fset_cache->cache_filter)->ioctl;
+ int (*cache_ioctl)(struct inode *, struct file *, unsigned int, unsigned long);
+ cache_ioctl = filter_c2cdfops(dd->dd_fset->fset_cache->cache_filter)->ioctl;
rc = -ENOTTY;
if (cache_ioctl)
rc = cache_ioctl(inode, file, cmd, arg);
@@ -902,47 +904,49 @@
return -EPERM;
}
- memset(buf, 0, sizeof(buf));
-
- if (izo_ioctl_getdata(buf, buf + 1024, (void *)arg)) {
+ /* allocate a zero'd buffer for data */
+ PRESTO_ALLOC(buf, bufsz);
+ if (!buf) {
+ EXIT;
+ return -ENOMEM;
+ }
+
+ if (izo_ioctl_getdata(buf, buf + bufsz, (void *)arg)) {
CERROR("intermezzo ioctl: data error\n");
- return -EINVAL;
+ rc = -EINVAL;
+ goto done;
}
data = (struct izo_ioctl_data *)buf;
switch(cmd) {
case IZO_IOC_REINTKML: {
- int rc;
int cperr;
rc = kml_reint_rec(file, data);
- EXIT;
cperr = copy_to_user((char *)arg, data, sizeof(*data));
if (cperr) {
CERROR("WARNING: cperr %d\n", cperr);
rc = -EFAULT;
}
- return rc;
+ goto done;
}
case IZO_IOC_GET_RCVD: {
struct izo_rcvd_rec rec;
struct presto_file_set *fset;
- int rc;
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
- }
+ rc = -ENODEV;
+ goto done;
+ }
+
rc = izo_rcvd_get(&rec, fset, data->ioc_uuid);
- if (rc < 0) {
- EXIT;
- return rc;
- }
+ if (rc < 0)
+ goto done;
- EXIT;
- return copy_to_user((char *)arg, &rec, sizeof(rec))? -EFAULT : 0;
+ rc = copy_to_user((char *)arg, &rec, sizeof(rec))? -EFAULT : 0;
+ goto done;
}
case IZO_IOC_REPSTATUS: {
@@ -951,12 +955,11 @@
struct izo_rcvd_rec rec;
struct presto_file_set *fset;
int minor;
- int rc;
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
@@ -965,13 +968,11 @@
rc = izo_repstatus(fset, client_kmlsize,
lr_client, &rec);
- if (rc < 0) {
- EXIT;
- return rc;
- }
+ if (rc < 0)
+ goto done;
- EXIT;
- return copy_to_user((char *)arg, &rec, sizeof(rec))? -EFAULT : 0;
+ rc = copy_to_user((char *)arg, &rec, sizeof(rec))? -EFAULT : 0;
+ goto done;
}
case IZO_IOC_GET_CHANNEL: {
@@ -979,30 +980,28 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
data->ioc_dev = fset->fset_cache->cache_psdev->uc_minor;
CDEBUG(D_PSDEV, "CHANNEL %d\n", data->ioc_dev);
- EXIT;
- return copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ rc = copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ goto done;
}
case IZO_IOC_SET_IOCTL_UID:
izo_authorized_uid = data->ioc_uid;
- EXIT;
- return 0;
+ rc = 0;
+ goto done;
case IZO_IOC_SET_PID:
rc = izo_psdev_setpid(data->ioc_dev);
- EXIT;
- return rc;
+ goto done;
case IZO_IOC_SET_CHANNEL:
rc = izo_psdev_setchannel(file, data->ioc_dev);
- EXIT;
- return rc;
+ goto done;
case IZO_IOC_GET_KML_SIZE: {
struct presto_file_set *fset;
@@ -1010,14 +1009,14 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
kmlsize = presto_kml_offset(fset) + fset->fset_kml_logical_off;
- EXIT;
- return copy_to_user((char *)arg, &kmlsize, sizeof(kmlsize))?-EFAULT : 0;
+ rc = copy_to_user((char *)arg, &kmlsize, sizeof(kmlsize))?-EFAULT : 0;
+ goto done;
}
case IZO_IOC_PURGE_FILE_DATA: {
@@ -1025,37 +1024,37 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
rc = izo_purge_file(fset, data->ioc_inlbuf1);
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_GET_FILEID: {
rc = izo_get_fileid(file, data);
- EXIT;
if (rc)
- return rc;
- return copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ goto done;
+
+ rc = copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ goto done;
}
case IZO_IOC_SET_FILEID: {
rc = izo_set_fileid(file, data);
- EXIT;
if (rc)
- return rc;
- return copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ goto done;
+
+ rc = copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ goto done;
}
case IZO_IOC_ADJUST_LML: {
struct lento_vfs_context *info;
info = (struct lento_vfs_context *)data->ioc_inlbuf1;
rc = presto_adjust_lml(file, info);
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_CONNECT: {
@@ -1064,16 +1063,15 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
rc = izo_upc_connect(minor, data->ioc_ino,
data->ioc_generation, data->ioc_uuid,
data->ioc_flags);
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_GO_FETCH_KML: {
@@ -1082,15 +1080,14 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
rc = izo_upc_go_fetch_kml(minor, fset->fset_name,
data->ioc_uuid, data->ioc_kmlsize);
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_REVOKE_PERMIT:
@@ -1098,26 +1095,23 @@
rc = izo_revoke_permit(file->f_dentry, data->ioc_uuid);
else
rc = izo_revoke_permit(file->f_dentry, NULL);
- EXIT;
- return rc;
+ goto done;
case IZO_IOC_CLEAR_FSET:
rc = izo_clear_fsetroot(file->f_dentry);
- EXIT;
- return rc;
+ goto done;
case IZO_IOC_CLEAR_ALL_FSETS: {
struct presto_file_set *fset;
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
rc = izo_clear_all_fsetroots(fset->fset_cache);
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_SET_FSET:
@@ -1127,9 +1121,7 @@
rc = presto_set_fsetroot_from_ioc(file->f_dentry,
data->ioc_inlbuf1,
data->ioc_flags);
- EXIT;
- return rc;
-
+ goto done;
case IZO_IOC_MARK: {
int res = 0; /* resulting flags - returned to user */
@@ -1185,16 +1177,16 @@
}
if (error) {
- EXIT;
- return error;
+ rc = error;
+ goto done;
}
data->ioc_mark_what = res;
CDEBUG(D_DOWNCALL, "mark inode: %ld, and: %x, or: %x, what %x\n",
file->f_dentry->d_inode->i_ino, data->ioc_and_flag,
data->ioc_or_flag, data->ioc_mark_what);
- EXIT;
- return copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ rc = copy_to_user((char *)arg, data, sizeof(*data))? -EFAULT : 0;
+ goto done;
}
#if 0
case IZO_IOC_CLIENT_MAKE_BRANCH: {
@@ -1203,16 +1195,15 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
rc = izo_upc_client_make_branch(minor, fset->fset_name,
data->ioc_inlbuf1,
data->ioc_inlbuf2);
- EXIT;
- return rc;
+ goto done;
}
#endif
case IZO_IOC_SERVER_MAKE_BRANCH: {
@@ -1221,14 +1212,14 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
izo_upc_server_make_branch(minor, data->ioc_inlbuf1);
- EXIT;
- return 0;
+ rc = 0;
+ goto done;
}
case IZO_IOC_SET_KMLSIZE: {
struct presto_file_set *fset;
@@ -1237,38 +1228,33 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
rc = izo_upc_set_kmlsize(minor, fset->fset_name, data->ioc_uuid,
data->ioc_kmlsize);
- if (rc != 0) {
- EXIT;
- return rc;
- }
+ if (rc != 0)
+ goto done;
rc = izo_rcvd_get(&rec, fset, data->ioc_uuid);
if (rc == -EINVAL) {
/* We don't know anything about this uuid yet; no
* worries. */
memset(&rec, 0, sizeof(rec));
- } else if (rc <= 0) {
+ } else if (rc <= 0) { /* do we really want to return 0 if rc == 0 here? */
CERROR("InterMezzo: error reading last_rcvd: %d\n", rc);
- EXIT;
- return rc;
+ goto done;
}
rec.lr_remote_offset = data->ioc_kmlsize;
rc = izo_rcvd_write(fset, &rec);
if (rc <= 0) {
CERROR("InterMezzo: error writing last_rcvd: %d\n", rc);
- EXIT;
- return rc;
+ goto done;
}
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_BRANCH_UNDO: {
struct presto_file_set *fset;
@@ -1276,15 +1262,14 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
rc = izo_upc_branch_undo(minor, fset->fset_name,
data->ioc_inlbuf1);
- EXIT;
- return rc;
+ goto done;
}
case IZO_IOC_BRANCH_REDO: {
struct presto_file_set *fset;
@@ -1292,28 +1277,33 @@
fset = presto_fset(file->f_dentry);
if (fset == NULL) {
- EXIT;
- return -ENODEV;
+ rc = -ENODEV;
+ goto done;
}
minor = presto_f2m(fset);
rc = izo_upc_branch_redo(minor, fset->fset_name,
data->ioc_inlbuf1);
- EXIT;
- return rc;
+ goto done;
}
case TCGETS:
- EXIT;
- return -EINVAL;
+ rc = -EINVAL;
+ goto done;
default:
EXIT;
- return -EINVAL;
-
+ rc = -EINVAL;
+ goto done;
+
}
+
+ rc = 0;
+
+ done:
+ PRESTO_FREE(buf, bufsz);
EXIT;
- return 0;
+ return rc;
}
struct file_operations presto_dir_fops = {
diff -Naur --exclude-from=/home/mulix/dontdiff linux-2.5/fs/intermezzo/journal.c linux-2.5.73-stack-lusers/fs/intermezzo/journal.c
--- linux-2.5/fs/intermezzo/journal.c 2002-12-14 03:57:54.000000000 +0200
+++ linux-2.5.73-stack-lusers/fs/intermezzo/journal.c 2003-06-25 23:32:50.000000000 +0300
@@ -1239,12 +1239,16 @@
return izo_rcvd_write(fset, &rec);
}
+/* we are called from presto_finish_kml_truncate, which is called */
+/* with fset->fset_kml.fd_lock held. Allocations must be GFP_ATOMIC */
struct file * presto_copy_kml_tail(struct presto_file_set *fset,
unsigned long int start)
{
struct file *f;
int len;
loff_t read_off, write_off, bytes;
+ char* buf;
+ size_t bufsz;
ENTRY;
@@ -1258,21 +1262,31 @@
write_off = 0;
read_off = start;
bytes = fset->fset_kml.fd_offset - start;
- while (bytes > 0) {
- char buf[4096];
- int toread;
- if (bytes > sizeof(buf))
- toread = sizeof(buf);
- else
- toread = bytes;
+ bufsz = bytes;
+ /* can't use PRESTO_ALLOC - alloction must be atomic */
+ buf = kmalloc(bufsz, GFP_ATOMIC);
+ if (!buf) {
+ CERROR("IZO: out of memory at %s:%d (trying to "
+ "allocate %d)\n", __FILE__, __LINE__,
+ bufsz);
+ filp_close(f, NULL);
+ EXIT;
+ return ERR_PTR(-ENOMEM);
+ }
+
+ presto_kmem_inc(buf, bufsz);
+ memset(buf, 0, bufsz);
- len = presto_fread(fset->fset_kml.fd_file, buf, toread,
+ while (bytes > 0) {
+ len = presto_fread(fset->fset_kml.fd_file, buf, bufsz,
&read_off);
if (len <= 0)
break;
if (presto_fwrite(f, buf, len, &write_off) != len) {
+ kfree(buf);
+ presto_kmem_dec(buf, bufsz);
filp_close(f, NULL);
EXIT;
return ERR_PTR(-EIO);
@@ -1280,7 +1294,9 @@
bytes -= len;
}
-
+
+ kfree(buf);
+ presto_kmem_dec(buf, bufsz);
EXIT;
return f;
}
@@ -1589,11 +1605,12 @@
{
int opcode = KML_OPCODE_GET_FILEID;
struct rec_info rec;
- char *buffer, *path, *logrecord, record[4096]; /*include path*/
+ char *buffer, *path, *logrecord, *record; /*include path*/
struct dentry *root;
__u32 uid, gid, pathlen;
int error, size;
struct kml_suffix *suffix;
+ size_t record_size;
ENTRY;
@@ -1609,9 +1626,13 @@
size_round(le32_to_cpu(pathlen)) +
sizeof(struct kml_suffix);
+ record_size = max(4096, size);
+ error = -ENOMEM;
+ PRESTO_ALLOC(record, record_size);
+ if (!record)
+ goto free_buffer;
+
CDEBUG(D_FILE, "kml size: %d\n", size);
- if ( size > sizeof(record) )
- CERROR("InterMezzo: BUFFER OVERFLOW in %s!\n", __FUNCTION__);
memset(&rec, 0, sizeof(rec));
rec.is_kml = 1;
@@ -1632,6 +1653,9 @@
size_round(le32_to_cpu(pathlen)), path,
fset->fset_name);
+ PRESTO_FREE(record, record_size);
+
+ free_buffer:
BUFF_FREE(buffer);
EXIT;
return error;
--
Muli Ben-Yehuda
http://www.mulix.org
http://www.livejournal.com/~mulix/
[-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2003-07-06 16:09 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2003-06-25 16:33 top stack users for 2.5.73 Jörn Engel
2003-06-25 20:38 ` [PATCH] intermezzo stack lossage (was Re: top stack users for 2.5.73) Muli Ben-Yehuda
2003-07-06 16:16 ` top stack users for 2.5.74 Jörn Engel
2003-07-06 16:23 ` Muli Ben-Yehuda
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