diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/binfmt_aout.c | 13 | ||||
| -rw-r--r-- | fs/binfmt_elf.c | 24 | ||||
| -rw-r--r-- | fs/binfmt_elf_fdpic.c | 29 | ||||
| -rw-r--r-- | fs/binfmt_flat.c | 6 | ||||
| -rw-r--r-- | fs/binfmt_som.c | 2 | ||||
| -rw-r--r-- | fs/exec.c | 38 |
6 files changed, 60 insertions, 52 deletions
diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c index b639dcf..346b694 100644 --- a/fs/binfmt_aout.c +++ b/fs/binfmt_aout.c @@ -32,7 +32,7 @@ static int load_aout_binary(struct linux_binprm *, struct pt_regs * regs); static int load_aout_library(struct file*); -static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit); +static int aout_core_dump(struct coredump_params *cprm); static struct linux_binfmt aout_format = { .module = THIS_MODULE, @@ -89,8 +89,9 @@ if (file->f_op->llseek) { \ * dumping of the process results in another error.. */ -static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit) +static int aout_core_dump(struct coredump_params *cprm) { + struct file *file = cprm->file; mm_segment_t fs; int has_dumped = 0; unsigned long dump_start, dump_size; @@ -108,16 +109,16 @@ static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file, u current->flags |= PF_DUMPCORE; strncpy(dump.u_comm, current->comm, sizeof(dump.u_comm)); dump.u_ar0 = offsetof(struct user, regs); - dump.signal = signr; - aout_dump_thread(regs, &dump); + dump.signal = cprm->signr; + aout_dump_thread(cprm->regs, &dump); /* If the size of the dump file exceeds the rlimit, then see what would happen if we wrote the stack, but not the data area. */ - if ((dump.u_dsize + dump.u_ssize+1) * PAGE_SIZE > limit) + if ((dump.u_dsize + dump.u_ssize+1) * PAGE_SIZE > cprm->limit) dump.u_dsize = 0; /* Make sure we have enough room to write the stack and data areas. */ - if ((dump.u_ssize + 1) * PAGE_SIZE > limit) + if ((dump.u_ssize + 1) * PAGE_SIZE > cprm->limit) dump.u_ssize = 0; /* make sure we actually have a data and stack area to dump */ diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 97b6e9e..edd90c4 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -45,7 +45,7 @@ static unsigned long elf_map(struct file *, unsigned long, struct elf_phdr *, * don't even try. */ #ifdef CONFIG_ELF_CORE -static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit); +static int elf_core_dump(struct coredump_params *cprm); #else #define elf_core_dump NULL #endif @@ -1272,8 +1272,9 @@ static int writenote(struct memelfnote *men, struct file *file, } #undef DUMP_WRITE -#define DUMP_WRITE(addr, nr) \ - if ((size += (nr)) > limit || !dump_write(file, (addr), (nr))) \ +#define DUMP_WRITE(addr, nr) \ + if ((size += (nr)) > cprm->limit || \ + !dump_write(cprm->file, (addr), (nr))) \ goto end_coredump; static void fill_elf_header(struct elfhdr *elf, int segs, @@ -1901,7 +1902,7 @@ static struct vm_area_struct *next_vma(struct vm_area_struct *this_vma, * and then they are actually written out. If we run out of core limit * we just truncate. */ -static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit) +static int elf_core_dump(struct coredump_params *cprm) { int has_dumped = 0; mm_segment_t fs; @@ -1947,7 +1948,7 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, un * notes. This also sets up the file header. */ if (!fill_note_info(elf, segs + 1, /* including notes section */ - &info, signr, regs)) + &info, cprm->signr, cprm->regs)) goto cleanup; has_dumped = 1; @@ -2009,14 +2010,14 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, un #endif /* write out the notes section */ - if (!write_note_info(&info, file, &foffset)) + if (!write_note_info(&info, cprm->file, &foffset)) goto end_coredump; - if (elf_coredump_extra_notes_write(file, &foffset)) + if (elf_coredump_extra_notes_write(cprm->file, &foffset)) goto end_coredump; /* Align to page */ - if (!dump_seek(file, dataoff - foffset)) + if (!dump_seek(cprm->file, dataoff - foffset)) goto end_coredump; for (vma = first_vma(current, gate_vma); vma != NULL; @@ -2033,12 +2034,13 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, un page = get_dump_page(addr); if (page) { void *kaddr = kmap(page); - stop = ((size += PAGE_SIZE) > limit) || - !dump_write(file, kaddr, PAGE_SIZE); + stop = ((size += PAGE_SIZE) > cprm->limit) || + !dump_write(cprm->file, kaddr, + PAGE_SIZE); kunmap(page); page_cache_release(page); } else - stop = !dump_seek(file, PAGE_SIZE); + stop = !dump_seek(cprm->file, PAGE_SIZE); if (stop) goto end_coredump; } diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c index 7b05538..c25256a 100644 --- a/fs/binfmt_elf_fdpic.c +++ b/fs/binfmt_elf_fdpic.c @@ -76,7 +76,7 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *, struct file *, struct mm_struct *); #ifdef CONFIG_ELF_CORE -static int elf_fdpic_core_dump(long, struct pt_regs *, struct file *, unsigned long limit); +static int elf_fdpic_core_dump(struct coredump_params *cprm); #endif static struct linux_binfmt elf_fdpic_format = { @@ -1326,8 +1326,9 @@ static int writenote(struct memelfnote *men, struct file *file) #undef DUMP_WRITE #undef DUMP_SEEK -#define DUMP_WRITE(addr, nr) \ - if ((size += (nr)) > limit || !dump_write(file, (addr), (nr))) \ +#define DUMP_WRITE(addr, nr) \ + if ((size += (nr)) > cprm->limit || \ + !dump_write(cprm->file, (addr), (nr))) \ goto end_coredump; static inline void fill_elf_fdpic_header(struct elfhdr *elf, int segs) @@ -1582,8 +1583,7 @@ static int elf_fdpic_dump_segments(struct file *file, size_t *size, * and then they are actually written out. If we run out of core limit * we just truncate. */ -static int elf_fdpic_core_dump(long signr, struct pt_regs *regs, - struct file *file, unsigned long limit) +static int elf_fdpic_core_dump(struct coredump_params *cprm) { #define NUM_NOTES 6 int has_dumped = 0; @@ -1642,7 +1642,7 @@ static int elf_fdpic_core_dump(long signr, struct pt_regs *regs, goto cleanup; #endif - if (signr) { + if (cprm->signr) { struct core_thread *ct; struct elf_thread_status *tmp; @@ -1661,14 +1661,14 @@ static int elf_fdpic_core_dump(long signr, struct pt_regs *regs, int sz; tmp = list_entry(t, struct elf_thread_status, list); - sz = elf_dump_thread_status(signr, tmp); + sz = elf_dump_thread_status(cprm->signr, tmp); thread_status_size += sz; } } /* now collect the dump for the current */ - fill_prstatus(prstatus, current, signr); - elf_core_copy_regs(&prstatus->pr_reg, regs); + fill_prstatus(prstatus, current, cprm->signr); + elf_core_copy_regs(&prstatus->pr_reg, cprm->regs); segs = current->mm->map_count; #ifdef ELF_CORE_EXTRA_PHDRS @@ -1703,7 +1703,7 @@ static int elf_fdpic_core_dump(long signr, struct pt_regs *regs, /* Try to dump the FPU. */ if ((prstatus->pr_fpvalid = - elf_core_copy_task_fpregs(current, regs, fpu))) + elf_core_copy_task_fpregs(current, cprm->regs, fpu))) fill_note(notes + numnote++, "CORE", NT_PRFPREG, sizeof(*fpu), fpu); #ifdef ELF_CORE_COPY_XFPREGS @@ -1774,7 +1774,7 @@ static int elf_fdpic_core_dump(long signr, struct pt_regs *regs, /* write out the notes section */ for (i = 0; i < numnote; i++) - if (!writenote(notes + i, file)) + if (!writenote(notes + i, cprm->file)) goto end_coredump; /* write out the thread status notes section */ @@ -1783,14 +1783,15 @@ static int elf_fdpic_core_dump(long signr, struct pt_regs *regs, list_entry(t, struct elf_thread_status, list); for (i = 0; i < tmp->num_notes; i++) - if (!writenote(&tmp->notes[i], file)) + if (!writenote(&tmp->notes[i], cprm->file)) goto end_coredump; } - if (!dump_seek(file, dataoff)) + if (!dump_seek(cprm->file, dataoff)) goto end_coredump; - if (elf_fdpic_dump_segments(file, &size, &limit, mm_flags) < 0) + if (elf_fdpic_dump_segments(cprm->file, &size, &cprm->limit, + mm_flags) < 0) goto end_coredump; #ifdef ELF_CORE_WRITE_EXTRA_DATA diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c index a279665..d4a00ea 100644 --- a/fs/binfmt_flat.c +++ b/fs/binfmt_flat.c @@ -87,7 +87,7 @@ static int load_flat_shared_library(int id, struct lib_info *p); #endif static int load_flat_binary(struct linux_binprm *, struct pt_regs * regs); -static int flat_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit); +static int flat_core_dump(struct coredump_params *cprm); static struct linux_binfmt flat_format = { .module = THIS_MODULE, @@ -102,10 +102,10 @@ static struct linux_binfmt flat_format = { * Currently only a stub-function. */ -static int flat_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit) +static int flat_core_dump(struct coredump_params *cprm) { printk("Process %s:%d received signr %d and should have core dumped\n", - current->comm, current->pid, (int) signr); + current->comm, current->pid, (int) cprm->signr); return(1); } diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c index eff74b9..2a9b533 100644 --- a/fs/binfmt_som.c +++ b/fs/binfmt_som.c @@ -43,7 +43,7 @@ static int load_som_library(struct file *); * don't even try. */ #if 0 -static int som_core_dump(long signr, struct pt_regs *regs, unsigned long limit); +static int som_core_dump(struct coredump_params *cprm); #else #define som_core_dump NULL #endif @@ -1763,17 +1763,20 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs) struct mm_struct *mm = current->mm; struct linux_binfmt * binfmt; struct inode * inode; - struct file * file; const struct cred *old_cred; struct cred *cred; int retval = 0; int flag = 0; int ispipe = 0; - unsigned long core_limit = current->signal->rlim[RLIMIT_CORE].rlim_cur; char **helper_argv = NULL; int helper_argc = 0; int dump_count = 0; static atomic_t core_dump_count = ATOMIC_INIT(0); + struct coredump_params cprm = { + .signr = signr, + .regs = regs, + .limit = current->signal->rlim[RLIMIT_CORE].rlim_cur, + }; audit_core_dumps(signr); @@ -1829,15 +1832,15 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs) ispipe = format_corename(corename, signr); unlock_kernel(); - if ((!ispipe) && (core_limit < binfmt->min_coredump)) + if ((!ispipe) && (cprm.limit < binfmt->min_coredump)) goto fail_unlock; if (ispipe) { - if (core_limit == 0) { + if (cprm.limit == 0) { /* * Normally core limits are irrelevant to pipes, since * we're not writing to the file system, but we use - * core_limit of 0 here as a speacial value. Any + * cprm.limit of 0 here as a speacial value. Any * non-zero limit gets set to RLIM_INFINITY below, but * a limit of 0 skips the dump. This is a consistent * way to catch recursive crashes. We can still crash @@ -1870,25 +1873,25 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs) goto fail_dropcount; } - core_limit = RLIM_INFINITY; + cprm.limit = RLIM_INFINITY; /* SIGPIPE can happen, but it's just never processed */ if (call_usermodehelper_pipe(helper_argv[0], helper_argv, NULL, - &file)) { + &cprm.file)) { printk(KERN_INFO "Core dump to %s pipe failed\n", corename); goto fail_dropcount; } } else - file = filp_open(corename, + cprm.file = filp_open(corename, O_CREAT | 2 | O_NOFOLLOW | O_LARGEFILE | flag, 0600); - if (IS_ERR(file)) + if (IS_ERR(cprm.file)) goto fail_dropcount; - inode = file->f_path.dentry->d_inode; + inode = cprm.file->f_path.dentry->d_inode; if (inode->i_nlink > 1) goto close_fail; /* multiple links - don't dump */ - if (!ispipe && d_unhashed(file->f_path.dentry)) + if (!ispipe && d_unhashed(cprm.file->f_path.dentry)) goto close_fail; /* AK: actually i see no reason to not allow this for named pipes etc., @@ -1901,21 +1904,22 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs) */ if (inode->i_uid != current_fsuid()) goto close_fail; - if (!file->f_op) + if (!cprm.file->f_op) goto close_fail; - if (!file->f_op->write) + if (!cprm.file->f_op->write) goto close_fail; - if (!ispipe && do_truncate(file->f_path.dentry, 0, 0, file) != 0) + if (!ispipe && + do_truncate(cprm.file->f_path.dentry, 0, 0, cprm.file) != 0) goto close_fail; - retval = binfmt->core_dump(signr, regs, file, core_limit); + retval = binfmt->core_dump(&cprm); if (retval) current->signal->group_exit_code |= 0x80; close_fail: if (ispipe && core_pipe_limit) - wait_for_dump_helpers(file); - filp_close(file, NULL); + wait_for_dump_helpers(cprm.file); + filp_close(cprm.file, NULL); fail_dropcount: if (dump_count) atomic_dec(&core_dump_count); |
