Last change
on this file since 3499 was 3320, checked in by Bruno Cornec, 10 years ago |
- Re-add (thanks git BTW) the 2.2.9 branch which had been destroyed in
the move to 3.0
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File size:
966 bytes
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Rev | Line | |
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[3320] | 1 | This patch makes /proc/self/exe executable even if proc
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| 2 | is not mounted. It is especially useful on NOMMU arches.
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| 3 |
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| 4 | diff -urp ../linux-2.6.30.org/fs/exec.c linux-2.6.30/fs/exec.c
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| 5 | --- ../linux-2.6.30.org/fs/exec.c 2009-06-10 05:05:27.000000000 +0200
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| 6 | +++ linux-2.6.30/fs/exec.c 2009-06-25 00:20:13.000000000 +0200
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| 7 | @@ -652,9 +652,25 @@ struct file *open_exec(const char *name)
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| 8 | file = do_filp_open(AT_FDCWD, name,
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| 9 | O_LARGEFILE | O_RDONLY | FMODE_EXEC, 0,
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| 10 | MAY_EXEC | MAY_OPEN);
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| 11 | - if (IS_ERR(file))
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| 12 | - goto out;
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| 13 | + if (IS_ERR(file)) {
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| 14 | + if ((PTR_ERR(file) == -ENOENT || PTR_ERR(file) == -EACCES)
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| 15 | + && strcmp(name, "/proc/self/exe") == 0
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| 16 | + ) {
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| 17 | + struct file *sv = file;
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| 18 | + struct mm_struct *mm;
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| 19 |
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| 20 | + mm = get_task_mm(current);
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| 21 | + if (!mm)
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| 22 | + goto out;
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| 23 | + file = get_mm_exe_file(mm);
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| 24 | + mmput(mm);
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| 25 | + if (file)
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| 26 | + goto ok;
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| 27 | + file = sv;
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| 28 | + }
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| 29 | + goto out;
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| 30 | + }
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| 31 | +ok:
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| 32 | err = -EACCES;
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| 33 | if (!S_ISREG(file->f_path.dentry->d_inode->i_mode))
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| 34 | goto exit;
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