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syslog: Provide stub check_syslog_permissions
When building without CONFIG_PRINTK, we need to provide a stub check_syslog_permissions. As there is no way to turn on the dmesg_restrict sysctl without CONFIG_PRINTK, return success. Reported-by: Jim Davis <jim.epost@gmail.com> Signed-off-by: Sebastian Schmidt <yath@yath.de> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
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@ -48,6 +48,14 @@
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#define SYSLOG_FROM_PROC 1
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int do_syslog(int type, char __user *buf, int count, bool from_file);
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#ifdef CONFIG_PRINTK
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int check_syslog_permissions(int type, bool from_file);
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#else
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static inline int check_syslog_permissions(int type, bool from_file)
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{
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return 0;
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}
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#endif
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#endif /* _LINUX_SYSLOG_H */
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