On Wed, May 19, 2021 at 04:00:20PM -0400, Richard Guy Briggs wrote: > Replace audit syscall class magic numbers with macros. > > This required putting the macros into new header file > include/linux/auditsc_classmacros.h since the syscall macros were > included for both 64 bit and 32 bit in any compat code, causing > redefinition warnings. > > Signed-off-by: Richard Guy Briggs <rgb@xxxxxxxxxx> > Link: https://lore.kernel.org/r/2300b1083a32aade7ae7efb95826e8f3f260b1df.1621363275.git.rgb@xxxxxxxxxx Looks good. Acked-by: Christian Brauner <christian.brauner@xxxxxxxxxx> Fwiw, I would explicitly number all enum values in auditsc_class_t not just the first one. > --- > MAINTAINERS | 1 + > arch/alpha/kernel/audit.c | 8 ++++---- > arch/ia64/kernel/audit.c | 8 ++++---- > arch/parisc/kernel/audit.c | 8 ++++---- > arch/parisc/kernel/compat_audit.c | 9 +++++---- > arch/powerpc/kernel/audit.c | 10 +++++----- > arch/powerpc/kernel/compat_audit.c | 11 ++++++----- > arch/s390/kernel/audit.c | 10 +++++----- > arch/s390/kernel/compat_audit.c | 11 ++++++----- > arch/sparc/kernel/audit.c | 10 +++++----- > arch/sparc/kernel/compat_audit.c | 11 ++++++----- > arch/x86/ia32/audit.c | 11 ++++++----- > arch/x86/kernel/audit_64.c | 8 ++++---- > include/linux/audit.h | 1 + > include/linux/auditsc_classmacros.h | 23 +++++++++++++++++++++++ > kernel/auditsc.c | 12 ++++++------ > lib/audit.c | 10 +++++----- > lib/compat_audit.c | 11 ++++++----- > 18 files changed, 102 insertions(+), 71 deletions(-) > create mode 100644 include/linux/auditsc_classmacros.h > > diff --git a/MAINTAINERS b/MAINTAINERS > index bd7aff0c120f..3348d12019f9 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -3036,6 +3036,7 @@ W: https://github.com/linux-audit > T: git git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit.git > F: include/asm-generic/audit_*.h > F: include/linux/audit.h > +F: include/linux/auditsc_classmacros.h > F: include/uapi/linux/audit.h > F: kernel/audit* > F: lib/*audit.c > diff --git a/arch/alpha/kernel/audit.c b/arch/alpha/kernel/audit.c > index 96a9d18ff4c4..81cbd804e375 100644 > --- a/arch/alpha/kernel/audit.c > +++ b/arch/alpha/kernel/audit.c > @@ -37,13 +37,13 @@ int audit_classify_syscall(int abi, unsigned syscall) > { > switch(syscall) { > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > case __NR_execve: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 0; > + return AUDITSC_NATIVE; > } > } > > diff --git a/arch/ia64/kernel/audit.c b/arch/ia64/kernel/audit.c > index 5192ca899fe6..dba6a74c9ab3 100644 > --- a/arch/ia64/kernel/audit.c > +++ b/arch/ia64/kernel/audit.c > @@ -38,13 +38,13 @@ int audit_classify_syscall(int abi, unsigned syscall) > { > switch(syscall) { > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > case __NR_execve: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 0; > + return AUDITSC_NATIVE; > } > } > > diff --git a/arch/parisc/kernel/audit.c b/arch/parisc/kernel/audit.c > index 9eb47b2225d2..14244e83db75 100644 > --- a/arch/parisc/kernel/audit.c > +++ b/arch/parisc/kernel/audit.c > @@ -47,13 +47,13 @@ int audit_classify_syscall(int abi, unsigned syscall) > #endif > switch (syscall) { > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > case __NR_execve: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 0; > + return AUDITSC_NATIVE; > } > } > > diff --git a/arch/parisc/kernel/compat_audit.c b/arch/parisc/kernel/compat_audit.c > index 20c39c9d86a9..1d6347d37d92 100644 > --- a/arch/parisc/kernel/compat_audit.c > +++ b/arch/parisc/kernel/compat_audit.c > @@ -1,4 +1,5 @@ > // SPDX-License-Identifier: GPL-2.0 > +#include <linux/auditsc_classmacros.h> > #include <asm/unistd.h> > > unsigned int parisc32_dir_class[] = { > @@ -30,12 +31,12 @@ int parisc32_classify_syscall(unsigned syscall) > { > switch (syscall) { > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > case __NR_execve: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 1; > + return AUDITSC_COMPAT; > } > } > diff --git a/arch/powerpc/kernel/audit.c b/arch/powerpc/kernel/audit.c > index a2dddd7f3d09..6eb18ef77dff 100644 > --- a/arch/powerpc/kernel/audit.c > +++ b/arch/powerpc/kernel/audit.c > @@ -47,15 +47,15 @@ int audit_classify_syscall(int abi, unsigned syscall) > #endif > switch(syscall) { > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > case __NR_socketcall: > - return 4; > + return AUDITSC_SOCKETCALL; > case __NR_execve: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 0; > + return AUDITSC_NATIVE; > } > } > > diff --git a/arch/powerpc/kernel/compat_audit.c b/arch/powerpc/kernel/compat_audit.c > index 55c6ccda0a85..b1dc2d1c4bad 100644 > --- a/arch/powerpc/kernel/compat_audit.c > +++ b/arch/powerpc/kernel/compat_audit.c > @@ -1,5 +1,6 @@ > // SPDX-License-Identifier: GPL-2.0 > #undef __powerpc64__ > +#include <linux/auditsc_classmacros.h> > #include <asm/unistd.h> > > unsigned ppc32_dir_class[] = { > @@ -31,14 +32,14 @@ int ppc32_classify_syscall(unsigned syscall) > { > switch(syscall) { > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > case __NR_socketcall: > - return 4; > + return AUDITSC_SOCKETCALL; > case __NR_execve: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 1; > + return AUDITSC_COMPAT; > } > } > diff --git a/arch/s390/kernel/audit.c b/arch/s390/kernel/audit.c > index d395c6c9944c..7e331e1831d4 100644 > --- a/arch/s390/kernel/audit.c > +++ b/arch/s390/kernel/audit.c > @@ -47,15 +47,15 @@ int audit_classify_syscall(int abi, unsigned syscall) > #endif > switch(syscall) { > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > case __NR_socketcall: > - return 4; > + return AUDITSC_SOCKETCALL; > case __NR_execve: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 0; > + return AUDITSC_NATIVE; > } > } > > diff --git a/arch/s390/kernel/compat_audit.c b/arch/s390/kernel/compat_audit.c > index 444fb1f66944..fc3d1c7ad21c 100644 > --- a/arch/s390/kernel/compat_audit.c > +++ b/arch/s390/kernel/compat_audit.c > @@ -1,5 +1,6 @@ > // SPDX-License-Identifier: GPL-2.0 > #undef __s390x__ > +#include <linux/auditsc_classmacros.h> > #include <asm/unistd.h> > #include "audit.h" > > @@ -32,14 +33,14 @@ int s390_classify_syscall(unsigned syscall) > { > switch(syscall) { > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > case __NR_socketcall: > - return 4; > + return AUDITSC_SOCKETCALL; > case __NR_execve: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 1; > + return AUDITSC_COMPAT; > } > } > diff --git a/arch/sparc/kernel/audit.c b/arch/sparc/kernel/audit.c > index a6e91bf34d48..50fab35bdaba 100644 > --- a/arch/sparc/kernel/audit.c > +++ b/arch/sparc/kernel/audit.c > @@ -48,15 +48,15 @@ int audit_classify_syscall(int abi, unsigned int syscall) > #endif > switch(syscall) { > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > case __NR_socketcall: > - return 4; > + return AUDITSC_SOCKETCALL; > case __NR_execve: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 0; > + return AUDITSC_NATIVE; > } > } > > diff --git a/arch/sparc/kernel/compat_audit.c b/arch/sparc/kernel/compat_audit.c > index 10eeb4f15b20..1c1b6d075421 100644 > --- a/arch/sparc/kernel/compat_audit.c > +++ b/arch/sparc/kernel/compat_audit.c > @@ -1,5 +1,6 @@ > // SPDX-License-Identifier: GPL-2.0 > #define __32bit_syscall_numbers__ > +#include <linux/auditsc_classmacros.h> > #include <asm/unistd.h> > #include "kernel.h" > > @@ -32,14 +33,14 @@ int sparc32_classify_syscall(unsigned int syscall) > { > switch(syscall) { > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > case __NR_socketcall: > - return 4; > + return AUDITSC_SOCKETCALL; > case __NR_execve: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 1; > + return AUDITSC_COMPAT; > } > } > diff --git a/arch/x86/ia32/audit.c b/arch/x86/ia32/audit.c > index 6efe6cb3768a..eedc37a1ee13 100644 > --- a/arch/x86/ia32/audit.c > +++ b/arch/x86/ia32/audit.c > @@ -1,4 +1,5 @@ > // SPDX-License-Identifier: GPL-2.0 > +#include <linux/auditsc_classmacros.h> > #include <asm/unistd_32.h> > #include <asm/audit.h> > > @@ -31,15 +32,15 @@ int ia32_classify_syscall(unsigned syscall) > { > switch (syscall) { > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > case __NR_socketcall: > - return 4; > + return AUDITSC_SOCKETCALL; > case __NR_execve: > case __NR_execveat: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 1; > + return AUDITSC_COMPAT; > } > } > diff --git a/arch/x86/kernel/audit_64.c b/arch/x86/kernel/audit_64.c > index 83d9cad4e68b..2a6cc9c9c881 100644 > --- a/arch/x86/kernel/audit_64.c > +++ b/arch/x86/kernel/audit_64.c > @@ -47,14 +47,14 @@ int audit_classify_syscall(int abi, unsigned syscall) > #endif > switch(syscall) { > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > case __NR_execve: > case __NR_execveat: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 0; > + return AUDITSC_NATIVE; > } > } > > diff --git a/include/linux/audit.h b/include/linux/audit.h > index 82b7c1116a85..283bc91a6932 100644 > --- a/include/linux/audit.h > +++ b/include/linux/audit.h > @@ -11,6 +11,7 @@ > > #include <linux/sched.h> > #include <linux/ptrace.h> > +#include <linux/auditsc_classmacros.h> /* syscall class macros */ > #include <uapi/linux/audit.h> > #include <uapi/linux/netfilter/nf_tables.h> > > diff --git a/include/linux/auditsc_classmacros.h b/include/linux/auditsc_classmacros.h > new file mode 100644 > index 000000000000..18757d270961 > --- /dev/null > +++ b/include/linux/auditsc_classmacros.h > @@ -0,0 +1,23 @@ > +/* SPDX-License-Identifier: GPL-2.0-or-later */ > +/* auditsc_classmacros.h -- Auditing support syscall macros > + * > + * Copyright 2021 Red Hat Inc., Durham, North Carolina. > + * All Rights Reserved. > + * > + * Author: Richard Guy Briggs <rgb@xxxxxxxxxx> > + */ > +#ifndef _LINUX_AUDITSCM_H_ > +#define _LINUX_AUDITSCM_H_ > + > +enum auditsc_class_t { > + AUDITSC_NATIVE = 0, > + AUDITSC_COMPAT, > + AUDITSC_OPEN, > + AUDITSC_OPENAT, > + AUDITSC_SOCKETCALL, > + AUDITSC_EXECVE, > + > + AUDITSC_NVALS /* count */ > +}; > + > +#endif > diff --git a/kernel/auditsc.c b/kernel/auditsc.c > index 0a9a1569f1ea..d775ea16505b 100644 > --- a/kernel/auditsc.c > +++ b/kernel/auditsc.c > @@ -166,7 +166,7 @@ static int audit_match_perm(struct audit_context *ctx, int mask) > n = ctx->major; > > switch (audit_classify_syscall(ctx->arch, n)) { > - case 0: /* native */ > + case AUDITSC_NATIVE: > if ((mask & AUDIT_PERM_WRITE) && > audit_match_class(AUDIT_CLASS_WRITE, n)) > return 1; > @@ -177,7 +177,7 @@ static int audit_match_perm(struct audit_context *ctx, int mask) > audit_match_class(AUDIT_CLASS_CHATTR, n)) > return 1; > return 0; > - case 1: /* 32bit on biarch */ > + case AUDITSC_COMPAT: /* 32bit on biarch */ > if ((mask & AUDIT_PERM_WRITE) && > audit_match_class(AUDIT_CLASS_WRITE_32, n)) > return 1; > @@ -188,13 +188,13 @@ static int audit_match_perm(struct audit_context *ctx, int mask) > audit_match_class(AUDIT_CLASS_CHATTR_32, n)) > return 1; > return 0; > - case 2: /* open */ > + case AUDITSC_OPEN: > return mask & ACC_MODE(ctx->argv[1]); > - case 3: /* openat */ > + case AUDITSC_OPENAT: > return mask & ACC_MODE(ctx->argv[2]); > - case 4: /* socketcall */ > + case AUDITSC_SOCKETCALL: > return ((mask & AUDIT_PERM_WRITE) && ctx->argv[0] == SYS_BIND); > - case 5: /* execve */ > + case AUDITSC_EXECVE: > return mask & AUDIT_PERM_EXEC; > default: > return 0; > diff --git a/lib/audit.c b/lib/audit.c > index 5004bff928a7..3ec1a94d8d64 100644 > --- a/lib/audit.c > +++ b/lib/audit.c > @@ -45,23 +45,23 @@ int audit_classify_syscall(int abi, unsigned syscall) > switch(syscall) { > #ifdef __NR_open > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > #endif > #ifdef __NR_openat > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > #endif > #ifdef __NR_socketcall > case __NR_socketcall: > - return 4; > + return AUDITSC_SOCKETCALL; > #endif > #ifdef __NR_execveat > case __NR_execveat: > #endif > case __NR_execve: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 0; > + return AUDITSC_NATIVE; > } > } > > diff --git a/lib/compat_audit.c b/lib/compat_audit.c > index 77eabad69b4a..a38b282d353f 100644 > --- a/lib/compat_audit.c > +++ b/lib/compat_audit.c > @@ -1,6 +1,7 @@ > // SPDX-License-Identifier: GPL-2.0 > #include <linux/init.h> > #include <linux/types.h> > +#include <linux/auditsc_classmacros.h> > #include <asm/unistd32.h> > > unsigned compat_dir_class[] = { > @@ -33,19 +34,19 @@ int audit_classify_compat_syscall(int abi, unsigned syscall) > switch (syscall) { > #ifdef __NR_open > case __NR_open: > - return 2; > + return AUDITSC_OPEN; > #endif > #ifdef __NR_openat > case __NR_openat: > - return 3; > + return AUDITSC_OPENAT; > #endif > #ifdef __NR_socketcall > case __NR_socketcall: > - return 4; > + return AUDITSC_SOCKETCALL; > #endif > case __NR_execve: > - return 5; > + return AUDITSC_EXECVE; > default: > - return 1; > + return AUDITSC_COMPAT; > } > } > -- > 2.27.0 >
