* Alistair John Strachan <[email protected]> wrote:
> | new stack-footprint maximum: krootimage/2846, 1204 bytes.
> | new stack-footprint maximum: konqueror/2938, 836 bytes.
btw., that's quite borderline to overflow. STACK_WARN is 512 bytes, i.e.
another 324 bytes of stack footprint and you'd trigger an overflow
warning. The worst-case stack footprint that your .config has is 1300+
bytes (zlib). Does openvpn trigger any zlib functionality? Also, the
worst-case stack footprint you had was an XFS trace. Below i've attached
a printout of all stackframes that are larger than 256 bytes (using your
.config).
Ingo
-----------------------------
VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 12
EXTRAVERSION = -RT-V0.7.51-18
(gdb)
(gdb) ####################################
(gdb) # c049d976, stack size: 1368 bytes #
(gdb) ####################################
(gdb) 0xc049d976 is in inflate_dynamic (inflate.c:765).
760 /*
761 * We use `noinline' here to prevent gcc-3.5 from using too much stack space
762 */
763 STATIC int noinline INIT inflate_dynamic(void)
764 /* decompress an inflated type 2 (dynamic Huffman codes) block. */
765 {
766 int i; /* temporary variables */
767 unsigned j;
768 unsigned l; /* last length */
769 unsigned m; /* mask for bit lengths table */
(gdb) 770 unsigned n; /* number of lengths to get */
771 struct huft *tl; /* literal/length code table */
772 struct huft *td; /* distance code table */
773 int bl; /* lookup bits for tl */
774 int bd; /* lookup bits for td */
775 unsigned nb; /* number of bit length codes */
776 unsigned nl; /* number of literal/length codes */
777 unsigned nd; /* number of distance codes */
778 #ifdef PKZIP_BUG_WORKAROUND
779 unsigned ll[288+32]; /* literal/length and distance code lengths */
(gdb)
(gdb) ####################################
(gdb) # c049d7b5, stack size: 1196 bytes #
(gdb) ####################################
(gdb) 0xc049d7b5 is in inflate_fixed (inflate.c:711).
706 */
707 STATIC int noinline INIT inflate_fixed(void)
708 /* decompress an inflated type 1 (fixed Huffman codes) block. We should
709 either replace this with a custom decoder, or at least precompute the
710 Huffman tables. */
711 {
712 int i; /* temporary variable */
713 struct huft *tl; /* literal/length code table */
714 struct huft *td; /* distance code table */
715 int bl; /* lookup bits for tl */
(gdb) 716 int bd; /* lookup bits for td */
717 unsigned l[288]; /* length list for huft_build */
718
719 DEBG("<fix");
720
721 /* set up literal table */
722 for (i = 0; i < 144; i++)
723 l[i] = 8;
724 for (; i < 256; i++)
725 l[i] = 9;
(gdb)
(gdb) ####################################
(gdb) # c0228ec3, stack size: 764 bytes #
(gdb) ####################################
(gdb) 0xc0228ec3 is in calc_mode_timings (drivers/video/fbmon.c:317).
312 else
313 return 0;
314 }
315
316 static void calc_mode_timings(int xres, int yres, int refresh, struct fb_videomode *mode)
317 {
318 struct fb_var_screeninfo var;
319 struct fb_info info;
320
321 var.xres = xres;
(gdb) 322 var.yres = yres;
323 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON,
324 refresh, &var, &info);
325 mode->xres = xres;
326 mode->yres = yres;
327 mode->pixclock = var.pixclock;
328 mode->refresh = refresh;
329 mode->left_margin = var.left_margin;
330 mode->right_margin = var.right_margin;
331 mode->upper_margin = var.upper_margin;
(gdb)
(gdb) ####################################
(gdb) # c0208e26, stack size: 600 bytes #
(gdb) ####################################
(gdb) 0xc0208e26 is in semctl_main (ipc/sem.c:586).
581 sem_unlock(sma);
582 return err;
583 }
584
585 static int semctl_main(int semid, int semnum, int cmd, int version, union semun arg)
586 {
587 struct sem_array *sma;
588 struct sem* curr;
589 int err;
590 ushort fast_sem_io[SEMMSL_FAST];
(gdb) 591 ushort* sem_io = fast_sem_io;
592 int nsems;
593
594 sma = sem_lock(semid);
595 if(sma==NULL)
596 return -EINVAL;
597
598 nsems = sma->sem_nsems;
599
600 err=-EIDRM;
(gdb)
(gdb) ####################################
(gdb) # c02de0f3, stack size: 572 bytes #
(gdb) ####################################
(gdb) 0xc02de0f3 is in ip_setsockopt (net/ipv4/ip_sockglue.c:385).
380 * Socket option code for IP. This is the end of the line after any TCP,UDP etc options on
381 * an IP socket.
382 */
383
384 int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, int optlen)
385 {
386 struct inet_sock *inet = inet_sk(sk);
387 int val=0,err;
388
389 if (level != SOL_IP)
(gdb) 390 return -ENOPROTOOPT;
391
392 if (((1<<optname) & ((1<<IP_PKTINFO) | (1<<IP_RECVTTL) |
393 (1<<IP_RECVOPTS) | (1<<IP_RECVTOS) |
394 (1<<IP_RETOPTS) | (1<<IP_TOS) |
395 (1<<IP_TTL) | (1<<IP_HDRINCL) |
396 (1<<IP_MTU_DISCOVER) | (1<<IP_RECVERR) |
397 (1<<IP_ROUTER_ALERT) | (1<<IP_FREEBIND))) ||
398 optname == IP_MULTICAST_TTL ||
399 optname == IP_MULTICAST_LOOP) {
(gdb)
(gdb) ####################################
(gdb) # c0209846, stack size: 488 bytes #
(gdb) ####################################
(gdb) 0xc0209846 is in sys_semtimedop (ipc/sem.c:1057).
1052 return un;
1053 }
1054
1055 asmlinkage long sys_semtimedop(int semid, struct sembuf __user *tsops,
1056 unsigned nsops, const struct timespec __user *timeout)
1057 {
1058 int error = -EINVAL;
1059 struct sem_array *sma;
1060 struct sembuf fast_sops[SEMOPM_FAST];
1061 struct sembuf* sops = fast_sops, *sop;
(gdb) 1062 struct sem_undo *un;
1063 int undos = 0, decrease = 0, alter = 0, max;
1064 struct sem_queue queue;
1065 unsigned long jiffies_left = 0;
1066
1067 if (nsops < 1 || semid < 0)
1068 return -EINVAL;
1069 if (nsops > sc_semopm)
1070 return -E2BIG;
1071 if(nsops > SEMOPM_FAST) {
(gdb)
(gdb) ####################################
(gdb) # c02decd6, stack size: 460 bytes #
(gdb) ####################################
(gdb) 0xc02decd6 is in ip_getsockopt (net/ipv4/ip_sockglue.c:877).
872 * Get the options. Note for future reference. The GET of IP options gets the
873 * _received_ ones. The set sets the _sent_ ones.
874 */
875
876 int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen)
877 {
878 struct inet_sock *inet = inet_sk(sk);
879 int val;
880 int len;
881
(gdb) 882 if(level!=SOL_IP)
883 return -EOPNOTSUPP;
884
885 #ifdef CONFIG_IP_MROUTE
886 if(optname>=MRT_BASE && optname <=MRT_BASE+10)
887 {
888 return ip_mroute_getsockopt(sk,optname,optval,optlen);
889 }
890 #endif
891
(gdb)
(gdb) ####################################
(gdb) # c0252146, stack size: 432 bytes #
(gdb) ####################################
(gdb) 0xc0252146 is in extract_buf (drivers/char/random.c:760).
755
756 return nbytes;
757 }
758
759 static void extract_buf(struct entropy_store *r, __u8 *out)
760 {
761 int i, x;
762 __u32 data[16], buf[5 + SHA_WORKSPACE_WORDS];
763
764 sha_init(buf);
(gdb) 765 /*
766 * As we hash the pool, we mix intermediate values of
767 * the hash back into the pool. This eliminates
768 * backtracking attacks (where the attacker knows
769 * the state of the pool plus the current outputs, and
770 * attempts to find previous ouputs), unless the hash
771 * function can be inverted.
772 */
773 for (i = 0, x = 0; i < r->poolinfo->poolwords; i += 16, x+=2) {
774 sha_transform(buf, (__u8 *)r->pool+i, buf + 5);
(gdb)
(gdb) ####################################
(gdb) # c02a0a26, stack size: 416 bytes #
(gdb) ####################################
(gdb) 0xc02a0a26 is in pcmcia_device_query (drivers/pcmcia/ds.c:436).
431
432 /*
433 * pcmcia_device_query -- determine information about a pcmcia device
434 */
435 static int pcmcia_device_query(struct pcmcia_device *p_dev)
436 {
437 cistpl_manfid_t manf_id;
438 cistpl_funcid_t func_id;
439 cistpl_vers_1_t vers1;
440 unsigned int i;
(gdb) 441
442 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
443 CISTPL_MANFID, &manf_id)) {
444 p_dev->manf_id = manf_id.manf;
445 p_dev->card_id = manf_id.card;
446 p_dev->has_manf_id = 1;
447 p_dev->has_card_id = 1;
448 }
449
450 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
(gdb)
(gdb) ####################################
(gdb) # c0169503, stack size: 408 bytes #
(gdb) ####################################
(gdb) 0xc0169503 is in blkdev_get (fs/block_dev.c:663).
658 bdput(bdev);
659 return ret;
660 }
661
662 int blkdev_get(struct block_device *bdev, mode_t mode, unsigned flags)
663 {
664 /*
665 * This crockload is due to bad choice of ->open() type.
666 * It will go away.
667 * For now, block device ->open() routine must _not_
(gdb) 668 * examine anything in 'inode' argument except ->i_rdev.
669 */
670 struct file fake_file = {};
671 struct dentry fake_dentry = {};
672 fake_file.f_mode = mode;
673 fake_file.f_flags = flags;
674 fake_file.f_dentry = &fake_dentry;
675 fake_dentry.d_inode = bdev->bd_inode;
676
677 return do_open(bdev, &fake_file);
(gdb)
(gdb) ####################################
(gdb) # c013ebf4, stack size: 388 bytes #
(gdb) ####################################
(gdb) 0xc013ebf4 is in __print_symbol (kernel/kallsyms.c:234).
229 return NULL;
230 }
231
232 /* Replace "%s" in format with address, or returns -errno. */
233 void __print_symbol(const char *fmt, unsigned long address)
234 {
235 char *modname;
236 const char *name;
237 unsigned long offset, size;
238 char namebuf[KSYM_NAME_LEN+1];
(gdb) 239 char buffer[sizeof("%s+%#lx/%#lx [%s]") + KSYM_NAME_LEN +
240 2*(BITS_PER_LONG*3/10) + MODULE_NAME_LEN + 1];
241
242 name = kallsyms_lookup(address, &size, &offset, &modname, namebuf);
243
244 if (!name)
245 sprintf(buffer, "0x%lx", address);
246 else {
247 if (modname)
248 sprintf(buffer, "%s+%#lx/%#lx [%s]", name, offset,
(gdb)
(gdb) ####################################
(gdb) # c020a773, stack size: 368 bytes #
(gdb) ####################################
(gdb) 0xc020a773 is in sys_shmctl (ipc/shm.c:409).
404 }
405 }
406 }
407
408 asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
409 {
410 struct shm_setbuf setbuf;
411 struct shmid_kernel *shp;
412 int err, version;
413
(gdb) 414 if (cmd < 0 || shmid < 0) {
415 err = -EINVAL;
416 goto out;
417 }
418
419 version = ipc_parse_version(&cmd);
420
421 switch (cmd) { /* replace with proc interface ? */
422 case IPC_INFO:
423 {
(gdb)
(gdb) ####################################
(gdb) # c01ad8b6, stack size: 348 bytes #
(gdb) ####################################
(gdb) 0xc01ad8b6 is in xfs_bmapi (fs/xfs/xfs_bmap.c:4530).
4525 controls a.g. for allocs */
4526 xfs_extlen_t total, /* total blocks needed */
4527 xfs_bmbt_irec_t *mval, /* output: map values */
4528 int *nmap, /* i/o: mval size/count */
4529 xfs_bmap_free_t *flist) /* i/o: list extents to free */
4530 {
4531 xfs_fsblock_t abno; /* allocated block number */
4532 xfs_extlen_t alen; /* allocated extent length */
4533 xfs_fileoff_t aoff; /* allocated file offset */
4534 xfs_bmalloca_t bma; /* args for xfs_bmap_alloc */
(gdb) 4535 char contig; /* allocation must be one extent */
4536 xfs_btree_cur_t *cur; /* bmap btree cursor */
4537 char delay; /* this request is for delayed alloc */
4538 xfs_fileoff_t end; /* end of mapped file region */
4539 int eof; /* we've hit the end of extent list */
4540 xfs_bmbt_rec_t *ep; /* extent list entry pointer */
4541 int error; /* error return */
4542 char exact; /* don't do all of wasdelayed extent */
4543 xfs_bmbt_irec_t got; /* current extent list record */
4544 xfs_ifork_t *ifp; /* inode fork pointer */
(gdb)
(gdb) ####################################
(gdb) # c0191e66, stack size: 344 bytes #
(gdb) ####################################
(gdb) 0xc0191e66 is in show_stat (fs/proc/proc_misc.c:327).
322 .llseek = seq_lseek,
323 .release = seq_release,
324 };
325
326 static int show_stat(struct seq_file *p, void *v)
327 {
328 int i;
329 unsigned long jif;
330 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
331 u64 sum = 0;
(gdb) 332
333 user = nice = system = idle = iowait =
334 irq = softirq = steal = cputime64_zero;
335 jif = - wall_to_monotonic.tv_sec;
336 if (wall_to_monotonic.tv_nsec)
337 --jif;
338
339 for_each_cpu(i) {
340 int j;
341
(gdb)
(gdb) ####################################
(gdb) # c0191af6, stack size: 344 bytes #
(gdb) ####################################
(gdb) 0xc0191af6 is in meminfo_read_proc (fs/proc/proc_misc.c:119).
114 return proc_calc_metrics(page, start, off, count, eof, len);
115 }
116
117 static int meminfo_read_proc(char *page, char **start, off_t off,
118 int count, int *eof, void *data)
119 {
120 struct sysinfo i;
121 int len;
122 struct page_state ps;
123 unsigned long inactive;
(gdb) 124 unsigned long active;
125 unsigned long free;
126 unsigned long committed;
127 unsigned long allowed;
128 struct vmalloc_info vmi;
129 long cached;
130
131 get_page_state(&ps);
132 get_zone_counts(&active, &inactive, &free);
133
(gdb)
(gdb) ####################################
(gdb) # c017f553, stack size: 344 bytes #
(gdb) ####################################
(gdb) 0xc017f553 is in sys_pivot_root (fs/namespace.c:1280).
1275 * though, so you may need to say mount --bind /nfs/my_root /nfs/my_root
1276 * first.
1277 */
1278
1279 asmlinkage long sys_pivot_root(const char __user *new_root, const char __user *put_old)
1280 {
1281 struct vfsmount *tmp;
1282 struct nameidata new_nd, old_nd, parent_nd, root_parent, user_nd;
1283 int error;
1284
(gdb) 1285 if (!capable(CAP_SYS_ADMIN))
1286 return -EPERM;
1287
1288 lock_kernel();
1289
1290 error = __user_walk(new_root, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &new_nd);
1291 if (error)
1292 goto out0;
1293 error = -EINVAL;
1294 if (!check_mnt(new_nd.mnt))
(gdb)
(gdb) ####################################
(gdb) # c01dc746, stack size: 340 bytes #
(gdb) ####################################
(gdb) 0xc01dc746 is in xfs_swapext (fs/xfs/xfs_dfrag.c:69).
64 * Syssgi interface for swapext
65 */
66 int
67 xfs_swapext(
68 xfs_swapext_t __user *sxp)
69 {
70 xfs_swapext_t sx;
71 xfs_inode_t *ip=NULL, *tip=NULL, *ips[2];
72 xfs_trans_t *tp;
73 xfs_mount_t *mp;
(gdb) 74 xfs_bstat_t *sbp;
75 struct file *fp = NULL, *tfp = NULL;
76 vnode_t *vp, *tvp;
77 bhv_desc_t *bdp, *tbdp;
78 vn_bhv_head_t *bhp, *tbhp;
79 uint lock_flags=0;
80 int ilf_fields, tilf_fields;
81 int error = 0;
82 xfs_ifork_t tempif, *ifp, *tifp;
83 __uint64_t tmp;
(gdb)
(gdb) ####################################
(gdb) # c011ad66, stack size: 340 bytes #
(gdb) ####################################
(gdb) 0xc011ad66 is in mm_init (kernel/fork.c:353).
348 #define free_mm(mm) (kmem_cache_free(mm_cachep, (mm)))
349
350 #include <linux/init_task.h>
351
352 static struct mm_struct * mm_init(struct mm_struct * mm)
353 {
354 atomic_set(&mm->mm_users, 1);
355 atomic_set(&mm->mm_count, 1);
356 init_rwsem(&mm->mmap_sem);
357 INIT_LIST_HEAD(&mm->mmlist);
(gdb) 358 mm->core_waiters = 0;
359 mm->nr_ptes = 0;
360 spin_lock_init(&mm->page_table_lock);
361 rwlock_init(&mm->ioctx_list_lock);
362 mm->ioctx_list = NULL;
363 mm->default_kioctx = (struct kioctx)INIT_KIOCTX(mm->default_kioctx, *mm);
364 INIT_LIST_HEAD(&mm->delayed_drop);
365 mm->free_area_cache = TASK_UNMAPPED_BASE;
366
367 if (likely(!mm_alloc_pgd(mm))) {
(gdb)
(gdb) ####################################
(gdb) # c0298a03, stack size: 336 bytes #
(gdb) ####################################
(gdb) 0xc0298a03 is in mmc_ioctl (drivers/cdrom/cdrom.c:2623).
2618 return cdo->generic_packet(cdi, &cgc);
2619 }
2620
2621 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
2622 unsigned long arg)
2623 {
2624 struct cdrom_device_ops *cdo = cdi->ops;
2625 struct packet_command cgc;
2626 struct request_sense sense;
2627 unsigned char buffer[32];
(gdb) 2628 int ret = 0;
2629
2630 memset(&cgc, 0, sizeof(cgc));
2631
2632 /* build a unified command and queue it through
2633 cdo->generic_packet() */
2634 switch (cmd) {
2635 case CDROMREADRAW:
2636 case CDROMREADMODE1:
2637 case CDROMREADMODE2: {
(gdb)
(gdb) ####################################
(gdb) # c02077d3, stack size: 336 bytes #
(gdb) ####################################
(gdb) 0xc02077d3 is in sys_msgctl (ipc/msg.c:328).
323 return -EINVAL;
324 }
325 }
326
327 asmlinkage long sys_msgctl (int msqid, int cmd, struct msqid_ds __user *buf)
328 {
329 int err, version;
330 struct msg_queue *msq;
331 struct msq_setbuf setbuf;
332 struct kern_ipc_perm *ipcp;
(gdb) 333
334 if (msqid < 0 || cmd < 0)
335 return -EINVAL;
336
337 version = ipc_parse_version(&cmd);
338
339 switch (cmd) {
340 case IPC_INFO:
341 case MSG_INFO:
342 {
(gdb)
(gdb) ####################################
(gdb) # c0190996, stack size: 336 bytes #
(gdb) ####################################
(gdb) 0xc0190996 is in do_task_stat (fs/proc/array.c:314).
309 #endif
310 return buffer - orig;
311 }
312
313 static int do_task_stat(struct task_struct *task, char * buffer, int whole)
314 {
315 unsigned long vsize, eip, esp, wchan = ~0UL;
316 long priority, nice;
317 int tty_pgrp = -1, tty_nr = 0;
318 sigset_t sigign, sigcatch;
(gdb) 319 char state;
320 int res;
321 pid_t ppid, pgid = -1, sid = -1;
322 int num_threads = 0;
323 struct mm_struct *mm;
324 unsigned long long start_time;
325 unsigned long cmin_flt = 0, cmaj_flt = 0;
326 unsigned long min_flt = 0, maj_flt = 0;
327 cputime_t cutime, cstime, utime, stime;
328 unsigned long rsslim = 0;
(gdb)
(gdb) ####################################
(gdb) # c02014f3, stack size: 332 bytes #
(gdb) ####################################
(gdb) 0xc02014f3 is in linvfs_mknod (fs/xfs/linux-2.6/xfs_iops.c:114).
109 linvfs_mknod(
110 struct inode *dir,
111 struct dentry *dentry,
112 int mode,
113 dev_t rdev)
114 {
115 struct inode *ip;
116 vattr_t va;
117 vnode_t *vp = NULL, *dvp = LINVFS_GET_VP(dir);
118 xfs_acl_t *default_acl = NULL;
(gdb) 119 attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS;
120 int error;
121
122 /*
123 * Irix uses Missed'em'V split, but doesn't want to see
124 * the upper 5 bits of (14bit) major.
125 */
126 if (!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)
127 return -EINVAL;
128
(gdb)
(gdb) ####################################
(gdb) # c0192f96, stack size: 332 bytes #
(gdb) ####################################
(gdb) 0xc0192f96 is in elf_kcore_store_hdr (fs/proc/kcore.c:143).
138 /*
139 * store an ELF coredump header in the supplied buffer
140 * nphdr is the number of elf_phdr to insert
141 */
142 static void elf_kcore_store_hdr(char *bufp, int nphdr, int dataoff)
143 {
144 struct elf_prstatus prstatus; /* NT_PRSTATUS */
145 struct elf_prpsinfo prpsinfo; /* NT_PRPSINFO */
146 struct elf_phdr *nhdr, *phdr;
147 struct elfhdr *elf;
(gdb) 148 struct memelfnote notes[3];
149 off_t offset = 0;
150 struct kcore_list *m;
151
152 /* setup ELF header */
153 elf = (struct elfhdr *) bufp;
154 bufp += sizeof(struct elfhdr);
155 offset += sizeof(struct elfhdr);
156 memcpy(elf->e_ident, ELFMAG, SELFMAG);
157 elf->e_ident[EI_CLASS] = ELF_CLASS;
(gdb)
(gdb) ####################################
(gdb) # c02d3076, stack size: 328 bytes #
(gdb) ####################################
(gdb) 0xc02d3076 is in rt_cache_seq_show (net/ipv4/route.c:292).
287 if (v && v != SEQ_START_TOKEN)
288 rcu_read_unlock_bh();
289 }
290
291 static int rt_cache_seq_show(struct seq_file *seq, void *v)
292 {
293 if (v == SEQ_START_TOKEN)
294 seq_printf(seq, "%-127s\n",
295 "Iface\tDestination\tGateway \tFlags\t\tRefCnt\tUse\t"
296 "Metric\tSource\t\tMTU\tWindow\tIRTT\tTOS\tHHRef\t"
(gdb) 297 "HHUptod\tSpecDst");
298 else {
299 struct rtable *r = v;
300 char temp[256];
301
302 sprintf(temp, "%s\t%08lX\t%08lX\t%8X\t%d\t%u\t%d\t"
303 "%08lX\t%d\t%u\t%u\t%02X\t%d\t%1d\t%08X",
304 r->u.dst.dev ? r->u.dst.dev->name : "*",
305 (unsigned long)r->rt_dst, (unsigned long)r->rt_gateway,
306 r->rt_flags, atomic_read(&r->u.dst.__refcnt),
(gdb)
(gdb) ####################################
(gdb) # c02953a5, stack size: 320 bytes #
(gdb) ####################################
(gdb) 0xc02953a5 is in mo_open_write (drivers/cdrom/cdrom.c:814).
809
810 return ret;
811 }
812
813 static int mo_open_write(struct cdrom_device_info *cdi)
814 {
815 struct packet_command cgc;
816 char buffer[255];
817 int ret;
818
(gdb) 819 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
820 cgc.quiet = 1;
821
822 /*
823 * obtain write protect information as per
824 * drivers/scsi/sd.c:sd_read_write_protect_flag
825 */
826
827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
828 if (ret)
(gdb)
(gdb) ####################################
(gdb) # c0227bd3, stack size: 320 bytes #
(gdb) ####################################
(gdb) 0xc0227bd3 is in fb_ioctl (drivers/video/fbmem.c:769).
764 }
765
766 static int
767 fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
768 unsigned long arg)
769 {
770 int fbidx = iminor(inode);
771 struct fb_info *info = registered_fb[fbidx];
772 struct fb_ops *fb = info->fbops;
773 struct fb_var_screeninfo var;
(gdb) 774 struct fb_fix_screeninfo fix;
775 struct fb_con2fbmap con2fb;
776 struct fb_cmap_user cmap;
777 struct fb_event event;
778 void __user *argp = (void __user *)arg;
779 int i;
780
781 if (!fb)
782 return -ENODEV;
783 switch (cmd) {
(gdb)
(gdb) ####################################
(gdb) # c02fdec3, stack size: 312 bytes #
(gdb) ####################################
(gdb) 0xc02fdec3 is in icmp_send (net/ipv4/icmp.c:434).
429 * MUST NOT reply to a multicast/broadcast MAC address.
430 * MUST reply to only the first fragment.
431 */
432
433 void icmp_send(struct sk_buff *skb_in, int type, int code, u32 info)
434 {
435 struct iphdr *iph;
436 int room;
437 struct icmp_bxm icmp_param;
438 struct rtable *rt = (struct rtable *)skb_in->dst;
(gdb) 439 struct ipcm_cookie ipc;
440 u32 saddr;
441 u8 tos;
442
443 if (!rt)
444 goto out;
445
446 /*
447 * Find the original header. It is expected to be valid, of course.
448 * Check this, icmp_send is called from the most obscure devices
(gdb)
(gdb) ####################################
(gdb) # c01ea456, stack size: 308 bytes #
(gdb) ####################################
(gdb) 0xc01ea456 is in xfs_trans_init (fs/xfs/xfs_trans.c:82).
77 * in the mount structure.
78 */
79 void
80 xfs_trans_init(
81 xfs_mount_t *mp)
82 {
83 xfs_trans_reservations_t *resp;
84
85 resp = &(mp->m_reservations);
86 resp->tr_write =
(gdb) 87 (uint)(XFS_CALC_WRITE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp));
88 resp->tr_itruncate =
89 (uint)(XFS_CALC_ITRUNCATE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp));
90 resp->tr_rename =
91 (uint)(XFS_CALC_RENAME_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp));
92 resp->tr_link = (uint)XFS_CALC_LINK_LOG_RES(mp);
93 resp->tr_remove =
94 (uint)(XFS_CALC_REMOVE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp));
95 resp->tr_symlink =
96 (uint)(XFS_CALC_SYMLINK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp));
(gdb)
(gdb) ####################################
(gdb) # c022af86, stack size: 300 bytes #
(gdb) ####################################
(gdb) 0xc022af86 is in store_mode (drivers/video/fbsysfs.c:108).
103 return snprintf(&buf[offset], PAGE_SIZE - offset, "%c:%dx%d-%d\n", m, mode->xres, mode->yres, mode->refresh);
104 }
105
106 static ssize_t store_mode(struct class_device *class_device, const char * buf,
107 size_t count)
108 {
109 struct fb_info *fb_info =
110 (struct fb_info *)class_get_devdata(class_device);
111 char mstr[100];
112 struct fb_var_screeninfo var;
(gdb) 113 struct fb_modelist *modelist;
114 struct fb_videomode *mode;
115 struct list_head *pos;
116 size_t i;
117 int err;
118
119 memset(&var, 0, sizeof(var));
120
121 list_for_each(pos, &fb_info->modelist) {
122 modelist = list_entry(pos, struct fb_modelist, list);
(gdb)
(gdb) ####################################
(gdb) # c049cae6, stack size: 292 bytes #
(gdb) ####################################
(gdb) 0xc049cae6 is in huft_build (inflate.c:293).
288 /* Given a list of code lengths and a maximum table size, make a set of
289 tables to decode that set of codes. Return zero on success, one if
290 the given code set is incomplete (the tables are still built in this
291 case), two if the input is invalid (all zero length codes or an
292 oversubscribed set of lengths), and three if not enough memory. */
293 {
294 unsigned a; /* counter for codes of length k */
295 unsigned c[BMAX+1]; /* bit length count table */
296 unsigned f; /* i repeats in table every f entries */
297 int g; /* maximum code length */
(gdb) 298 int h; /* table level */
299 register unsigned i; /* counter, current code */
300 register unsigned j; /* counter */
301 register int k; /* number of bits in current code */
302 int l; /* bits per table (returned in m) */
303 register unsigned *p; /* pointer into c[], b[], or v[] */
304 register struct huft *q; /* points to current table */
305 struct huft r; /* table entry for structure assignment */
306 struct huft *u[BMAX]; /* table stack */
307 unsigned *v; /* values in order of bit length */
(gdb)
(gdb) ####################################
(gdb) # c02b9426, stack size: 288 bytes #
(gdb) ####################################
(gdb) 0xc02b9426 is in sys_sendmsg (net/socket.c:1692).
1687 /*
1688 * BSD sendmsg interface
1689 */
1690
1691 asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags)
1692 {
1693 struct compat_msghdr __user *msg_compat = (struct compat_msghdr __user *)msg;
1694 struct socket *sock;
1695 char address[MAX_SOCK_ADDR];
1696 struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
(gdb) 1697 unsigned char ctl[sizeof(struct cmsghdr) + 20]; /* 20 is size of ipv6_pktinfo */
1698 unsigned char *ctl_buf = ctl;
1699 struct msghdr msg_sys;
1700 int err, ctl_len, iov_size, total_len;
1701
1702 err = -EFAULT;
1703 if (MSG_CMSG_COMPAT & flags) {
1704 if (get_compat_msghdr(&msg_sys, msg_compat))
1705 return -EFAULT;
1706 } else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr)))
(gdb)
(gdb) ####################################
(gdb) # c01825c3, stack size: 288 bytes #
(gdb) ####################################
(gdb) 0xc01825c3 is in setxattr (fs/xattr.c:27).
22 * Extended attribute SET operations
23 */
24 static long
25 setxattr(struct dentry *d, char __user *name, void __user *value,
26 size_t size, int flags)
27 {
28 int error;
29 void *kvalue = NULL;
30 char kname[XATTR_NAME_MAX + 1];
31
(gdb) 32 if (flags & ~(XATTR_CREATE|XATTR_REPLACE))
33 return -EINVAL;
34
35 error = strncpy_from_user(kname, name, sizeof(kname));
36 if (error == 0 || error == sizeof(kname))
37 error = -ERANGE;
38 if (error < 0)
39 return error;
40
41 if (size) {
(gdb)
(gdb) ####################################
(gdb) # c01828a3, stack size: 284 bytes #
(gdb) ####################################
(gdb) 0xc01828a3 is in getxattr (fs/xattr.c:120).
115 /*
116 * Extended attribute GET operations
117 */
118 static ssize_t
119 getxattr(struct dentry *d, char __user *name, void __user *value, size_t size)
120 {
121 ssize_t error;
122 void *kvalue = NULL;
123 char kname[XATTR_NAME_MAX + 1];
124
(gdb) 125 error = strncpy_from_user(kname, name, sizeof(kname));
126 if (error == 0 || error == sizeof(kname))
127 error = -ERANGE;
128 if (error < 0)
129 return error;
130
131 if (size) {
132 if (size > XATTR_SIZE_MAX)
133 size = XATTR_SIZE_MAX;
134 kvalue = kmalloc(size, GFP_KERNEL);
(gdb)
(gdb) ####################################
(gdb) # c02dd456, stack size: 280 bytes #
(gdb) ####################################
(gdb) 0xc02dd456 is in ip_send_reply (net/ipv4/ip_output.c:1276).
1271 *
1272 * LATER: switch from ip_build_xmit to ip_append_*
1273 */
1274 void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *arg,
1275 unsigned int len)
1276 {
1277 struct inet_sock *inet = inet_sk(sk);
1278 struct {
1279 struct ip_options opt;
1280 char data[40];
(gdb) 1281 } replyopts;
1282 struct ipcm_cookie ipc;
1283 u32 daddr;
1284 struct rtable *rt = (struct rtable*)skb->dst;
1285
1286 if (ip_options_echo(&replyopts.opt, skb))
1287 return;
1288
1289 daddr = ipc.addr = rt->rt_src;
1290 ipc.opt = NULL;
(gdb)
(gdb) ####################################
(gdb) # c0182d33, stack size: 280 bytes #
(gdb) ####################################
(gdb) 0xc0182d33 is in removexattr (fs/xattr.c:289).
284 /*
285 * Extended attribute REMOVE operations
286 */
287 static long
288 removexattr(struct dentry *d, char __user *name)
289 {
290 int error;
291 char kname[XATTR_NAME_MAX + 1];
292
293 error = strncpy_from_user(kname, name, sizeof(kname));
(gdb) 294 if (error == 0 || error == sizeof(kname))
295 error = -ERANGE;
296 if (error < 0)
297 return error;
298
299 error = -EOPNOTSUPP;
300 if (d->d_inode->i_op && d->d_inode->i_op->removexattr) {
301 error = security_inode_removexattr(d, kname);
302 if (error)
303 goto out;
(gdb)
(gdb) ####################################
(gdb) # c02b1f86, stack size: 276 bytes #
(gdb) ####################################
(gdb) 0xc02b1f86 is in cpufreq_add_dev (drivers/cpufreq/cpufreq.c:568).
563 * cpufreq_add_dev - add a CPU device
564 *
565 * Adds the cpufreq interface for a CPU device.
566 */
567 static int cpufreq_add_dev (struct sys_device * sys_dev)
568 {
569 unsigned int cpu = sys_dev->id;
570 int ret = 0;
571 struct cpufreq_policy new_policy;
572 struct cpufreq_policy *policy;
(gdb) 573 struct freq_attr **drv_attr;
574 unsigned long flags;
575 unsigned int j;
576
577 cpufreq_debug_disable_ratelimit();
578 dprintk("adding CPU %u\n", cpu);
579
580 #ifdef CONFIG_SMP
581 /* check whether a different CPU already registered this
582 * CPU because it is in the same boat. */
(gdb)
(gdb) ####################################
(gdb) # c02b1c73, stack size: 276 bytes #
(gdb) ####################################
(gdb) 0xc02b1c73 is in store_scaling_governor (drivers/cpufreq/cpufreq.c:406).
401 /**
402 * store_scaling_governor - store policy for the specified CPU
403 */
404 static ssize_t store_scaling_governor (struct cpufreq_policy * policy,
405 const char *buf, size_t count)
406 {
407 unsigned int ret = -EINVAL;
408 char str_governor[16];
409 struct cpufreq_policy new_policy;
410
(gdb) 411 ret = cpufreq_get_policy(&new_policy, policy->cpu);
412 if (ret)
413 return ret;
414
415 ret = sscanf (buf, "%15s", str_governor);
416 if (ret != 1)
417 return -EINVAL;
418
419 if (cpufreq_parse_governor(str_governor, &new_policy.policy, &new_policy.governor))
420 return -EINVAL;
(gdb)
(gdb) ####################################
(gdb) # c04b4bb5, stack size: 272 bytes #
(gdb) ####################################
(gdb) 0xc04b4bb5 is in pirq_peer_trick (arch/i386/pci/irq.c:96).
91 * bridges. It's a gross hack, but since there are no other known
92 * ways how to get a list of buses, we have to go this way.
93 */
94
95 static void __init pirq_peer_trick(void)
96 {
97 struct irq_routing_table *rt = pirq_table;
98 u8 busmap[256];
99 int i;
100 struct irq_info *e;
(gdb) 101
102 memset(busmap, 0, sizeof(busmap));
103 for(i=0; i < (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info); i++) {
104 e = &rt->slots[i];
105 #ifdef DEBUG
106 {
107 int j;
108 DBG("%02x:%02x slot=%02x", e->bus, e->devfn/8, e->slot);
109 for(j=0; j<4; j++)
110 DBG(" %d:%02x/%04x", j, e->irq[j].link, e->irq[j].bitmap);
(gdb)
(gdb) ####################################
(gdb) # c02b3003, stack size: 272 bytes #
(gdb) ####################################
(gdb) 0xc02b3003 is in cpufreq_update_policy (drivers/cpufreq/cpufreq.c:1391).
1386 *
1387 * Usefull for policy notifiers which have different necessities
1388 * at different times.
1389 */
1390 int cpufreq_update_policy(unsigned int cpu)
1391 {
1392 struct cpufreq_policy *data = cpufreq_cpu_get(cpu);
1393 struct cpufreq_policy policy;
1394 int ret = 0;
1395
(gdb) 1396 if (!data)
1397 return -ENODEV;
1398
1399 down(&data->lock);
1400
1401 dprintk("updating policy for CPU %u\n", cpu);
1402 memcpy(&policy,
1403 data,
1404 sizeof(struct cpufreq_policy));
1405 policy.min = data->user_policy.min;
(gdb)
(gdb) ####################################
(gdb) # c0297193, stack size: 268 bytes #
(gdb) ####################################
(gdb) 0xc0297193 is in dvd_read_bca (drivers/cdrom/cdrom.c:1831).
1826 kfree(buf);
1827 return ret;
1828 }
1829
1830 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s)
1831 {
1832 int ret;
1833 u_char buf[4 + 188];
1834 struct packet_command cgc;
1835 struct cdrom_device_ops *cdo = cdi->ops;
(gdb) 1836
1837 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1838 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1839 cgc.cmd[7] = s->type;
1840 cgc.cmd[9] = cgc.buflen = 0xff;
1841
1842 if ((ret = cdo->generic_packet(cdi, &cgc)))
1843 return ret;
1844
1845 s->bca.len = buf[0] << 8 | buf[1];
(gdb)
(gdb) ####################################
(gdb) # c01d9e46, stack size: 268 bytes #
(gdb) ####################################
(gdb) 0xc01d9e46 is in xfs_iomap_write_delay (fs/xfs/xfs_iomap.c:552).
547 xfs_off_t offset,
548 size_t count,
549 int ioflag,
550 xfs_bmbt_irec_t *ret_imap,
551 int *nmaps)
552 {
553 xfs_mount_t *mp = ip->i_mount;
554 xfs_iocore_t *io = &ip->i_iocore;
555 xfs_fileoff_t offset_fsb;
556 xfs_fileoff_t last_fsb;
(gdb) 557 xfs_fsize_t isize;
558 xfs_fsblock_t firstblock;
559 int nimaps;
560 int error;
561 xfs_bmbt_irec_t imap[XFS_WRITE_IMAPS];
562 int aeof;
563 int fsynced = 0;
564
565 ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE) != 0);
566
(gdb)
(gdb) ####################################
(gdb) # c01cd5b6, stack size: 268 bytes #
(gdb) ####################################
(gdb) 0xc01cd5b6 is in xfs_ialloc_ag_alloc (fs/xfs/xfs_ialloc.c:138).
133 STATIC int /* error code or 0 */
134 xfs_ialloc_ag_alloc(
135 xfs_trans_t *tp, /* transaction pointer */
136 xfs_buf_t *agbp, /* alloc group buffer */
137 int *alloc)
138 {
139 xfs_agi_t *agi; /* allocation group header */
140 xfs_alloc_arg_t args; /* allocation argument structure */
141 int blks_per_cluster; /* fs blocks per inode cluster */
142 xfs_btree_cur_t *cur; /* inode btree cursor */
(gdb) 143 xfs_daddr_t d; /* disk addr of buffer */
144 int error;
145 xfs_buf_t *fbuf; /* new free inodes' buffer */
146 xfs_dinode_t *free; /* new free inode structure */
147 int i; /* inode counter */
148 int j; /* block counter */
149 int nbufs; /* num bufs of new inodes */
150 xfs_agino_t newino; /* new first inode's number */
151 xfs_agino_t newlen; /* new number of inodes */
152 int ninodes; /* num inodes per buf */
(gdb)
(gdb) ####################################
(gdb) # c0178186, stack size: 268 bytes #
(gdb) ####################################
(gdb) 0xc0178186 is in locks_remove_flock (fs/locks.c:1859).
1854
1855 /*
1856 * This function is called on the last close of an open file.
1857 */
1858 void locks_remove_flock(struct file *filp)
1859 {
1860 struct inode * inode = filp->f_dentry->d_inode;
1861 struct file_lock *fl;
1862 struct file_lock **before;
1863
(gdb) 1864 if (!inode->i_flock)
1865 return;
1866
1867 if (filp->f_op && filp->f_op->flock) {
1868 struct file_lock fl = {
1869 .fl_pid = current->tgid,
1870 .fl_file = filp,
1871 .fl_flags = FL_FLOCK,
1872 .fl_type = F_UNLCK,
1873 .fl_end = OFFSET_MAX,
(gdb)
(gdb) ####################################
(gdb) # c012bc04, stack size: 268 bytes #
(gdb) ####################################
(gdb) 0xc012bc04 is in sys_reboot (kernel/sys.c:372).
367 * You can also set the meaning of the ctrl-alt-del-key here.
368 *
369 * reboot doesn't sync: do that yourself before calling this.
370 */
371 asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user * arg)
372 {
373 char buffer[256];
374
375 /* We only trust the superuser with rebooting the system. */
376 if (!capable(CAP_SYS_BOOT))
(gdb) 377 return -EPERM;
378
379 /* For safety, we require "magic" arguments. */
380 if (magic1 != LINUX_REBOOT_MAGIC1 ||
381 (magic2 != LINUX_REBOOT_MAGIC2 &&
382 magic2 != LINUX_REBOOT_MAGIC2A &&
383 magic2 != LINUX_REBOOT_MAGIC2B &&
384 magic2 != LINUX_REBOOT_MAGIC2C))
385 return -EINVAL;
386
(gdb)
(gdb) ####################################
(gdb) # c02b96d6, stack size: 264 bytes #
(gdb) ####################################
(gdb) 0xc02b96d6 is in sys_recvmsg (net/socket.c:1786).
1781 /*
1782 * BSD recvmsg interface
1783 */
1784
1785 asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, unsigned int flags)
1786 {
1787 struct compat_msghdr __user *msg_compat = (struct compat_msghdr __user *)msg;
1788 struct socket *sock;
1789 struct iovec iovstack[UIO_FASTIOV];
1790 struct iovec *iov=iovstack;
(gdb) 1791 struct msghdr msg_sys;
1792 unsigned long cmsg_ptr;
1793 int err, iov_size, total_len, len;
1794
1795 /* kernel mode address */
1796 char addr[MAX_SOCK_ADDR];
1797
1798 /* user mode address pointers */
1799 struct sockaddr __user *uaddr;
1800 int __user *uaddr_len;
(gdb)
(gdb) ####################################
(gdb) # c0280a83, stack size: 260 bytes #
(gdb) ####################################
(gdb) 0xc0280a83 is in generic_ide_resume (drivers/ide/ide.c:1238).
1233
1234 return ide_do_drive_cmd(drive, &rq, ide_wait);
1235 }
1236
1237 static int generic_ide_resume(struct device *dev)
1238 {
1239 ide_drive_t *drive = dev->driver_data;
1240 struct request rq;
1241 struct request_pm_state rqpm;
1242 ide_task_t args;
(gdb) 1243
1244 memset(&rq, 0, sizeof(rq));
1245 memset(&rqpm, 0, sizeof(rqpm));
1246 memset(&args, 0, sizeof(args));
1247 rq.flags = REQ_PM_RESUME;
1248 rq.special = &args;
1249 rq.pm = &rqpm;
1250 rqpm.pm_step = ide_pm_state_start_resume;
1251 rqpm.pm_state = 0;
1252
(gdb)
(gdb) ####################################
(gdb) # c02809e3, stack size: 260 bytes #
(gdb) ####################################
(gdb) 0xc02809e3 is in generic_ide_suspend (drivers/ide/ide.c:1219).
1214 }
1215
1216 EXPORT_SYMBOL(system_bus_clock);
1217
1218 static int generic_ide_suspend(struct device *dev, pm_message_t state)
1219 {
1220 ide_drive_t *drive = dev->driver_data;
1221 struct request rq;
1222 struct request_pm_state rqpm;
1223 ide_task_t args;
(gdb) 1224
1225 memset(&rq, 0, sizeof(rq));
1226 memset(&rqpm, 0, sizeof(rqpm));
1227 memset(&args, 0, sizeof(args));
1228 rq.flags = REQ_PM_SUSPEND;
1229 rq.special = &args;
1230 rq.pm = &rqpm;
1231 rqpm.pm_step = ide_pm_state_start_suspend;
1232 rqpm.pm_state = state;
1233
(gdb)
(gdb) ####################################
(gdb) # c0277623, stack size: 260 bytes #
(gdb) ####################################
(gdb) 0xc0277623 is in blkpg_ioctl (drivers/block/ioctl.c:10).
5 #include <linux/buffer_head.h>
6 #include <linux/smp_lock.h>
7 #include <asm/uaccess.h>
8
9 static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user *arg)
10 {
11 struct block_device *bdevp;
12 struct gendisk *disk;
13 struct blkpg_ioctl_arg a;
14 struct blkpg_partition p;
(gdb) 15 long long start, length;
16 int part;
17 int i;
18
19 if (!capable(CAP_SYS_ADMIN))
20 return -EACCES;
21 if (copy_from_user(&a, arg, sizeof(struct blkpg_ioctl_arg)))
22 return -EFAULT;
23 if (copy_from_user(&p, a.data, sizeof(struct blkpg_partition)))
24 return -EFAULT;
(gdb)
(gdb) ####################################
(gdb) # c01a99b6, stack size: 256 bytes #
(gdb) ####################################
(gdb) 0xc01a99b6 is in xfs_bmap_alloc (fs/xfs/xfs_bmap.c:2154).
2149 * It figures out where to ask the underlying allocator to put the new extent.
2150 */
2151 STATIC int /* error */
2152 xfs_bmap_alloc(
2153 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
2154 {
2155 xfs_fsblock_t adjust; /* adjustment to block numbers */
2156 xfs_alloctype_t atype=0; /* type for allocation routines */
2157 int error; /* error return value */
2158 xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */
(gdb) 2159 xfs_mount_t *mp; /* mount point structure */
2160 int nullfb; /* true if ap->firstblock isn't set */
2161 int rt; /* true if inode is realtime */
2162 #ifdef __KERNEL__
2163 xfs_extlen_t prod=0; /* product factor for allocators */
2164 xfs_extlen_t ralen=0; /* realtime allocation length */
2165 #endif
2166
2167 #define ISVALID(x,y) \
2168 (rt ? \
(gdb)
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[Video 4 Linux]
[Linux for the blind]
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