Messages in this thread Patch in this message | | | Date | Mon, 27 Feb 2012 11:12:31 -0800 | From | Kees Cook <> | Subject | [PATCH] seccomp: remove duplicated failure logging |
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This consolidates the seccomp filter error logging path and adds more details to the audit log.
Signed-off-by: Kees Cook <keescook@chromium.org>
--- To be applied on top of Will Drewry's seccomp series, specifically "[PATCH v11 06/12] seccomp: add system call filtering using BPF".
v2: - drop compat (really arch) for now. --- include/linux/audit.h | 8 ++++---- kernel/auditsc.c | 5 +++-- kernel/seccomp.c | 15 +-------------- 3 files changed, 8 insertions(+), 20 deletions(-)
diff --git a/include/linux/audit.h b/include/linux/audit.h index 9ff7a2c..5aac29b 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -463,7 +463,7 @@ extern void audit_putname(const char *name); extern void __audit_inode(const char *name, const struct dentry *dentry); extern void __audit_inode_child(const struct dentry *dentry, const struct inode *parent); -extern void __audit_seccomp(unsigned long syscall); +extern void __audit_seccomp(unsigned long syscall, long signr); extern void __audit_ptrace(struct task_struct *t); static inline int audit_dummy_context(void) @@ -508,10 +508,10 @@ static inline void audit_inode_child(const struct dentry *dentry, } void audit_core_dumps(long signr); -static inline void audit_seccomp(unsigned long syscall) +static inline void audit_seccomp(unsigned long syscall, long signr) { if (unlikely(!audit_dummy_context())) - __audit_seccomp(syscall); + __audit_seccomp(syscall, signr); } static inline void audit_ptrace(struct task_struct *t) @@ -634,7 +634,7 @@ extern int audit_signals; #define audit_inode(n,d) do { (void)(d); } while (0) #define audit_inode_child(i,p) do { ; } while (0) #define audit_core_dumps(i) do { ; } while (0) -#define audit_seccomp(i) do { ; } while (0) +#define audit_seccomp(i, s) do { ; } while (0) #define auditsc_get_stamp(c,t,s) (0) #define audit_get_loginuid(t) (-1) #define audit_get_sessionid(t) (-1) diff --git a/kernel/auditsc.c b/kernel/auditsc.c index af1de0f..2150339 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -2710,13 +2710,14 @@ void audit_core_dumps(long signr) audit_log_end(ab); } -void __audit_seccomp(unsigned long syscall) +void __audit_seccomp(unsigned long syscall, long signr) { struct audit_buffer *ab; ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND); - audit_log_abend(ab, "seccomp", SIGKILL); + audit_log_abend(ab, "seccomp", signr); audit_log_format(ab, " syscall=%ld", syscall); + audit_log_format(ab, " ip=0x%lx", KSTK_EIP(current)); audit_log_end(ab); } diff --git a/kernel/seccomp.c b/kernel/seccomp.c index 5aabc3c..40af83f 100644 --- a/kernel/seccomp.c +++ b/kernel/seccomp.c @@ -57,18 +57,6 @@ struct seccomp_filter { struct sock_filter insns[]; }; -static void seccomp_filter_log_failure(int syscall) -{ - int compat = 0; -#ifdef CONFIG_COMPAT - compat = is_compat_task(); -#endif - pr_info("%s[%d]: %ssystem call %d blocked at 0x%lx\n", - current->comm, task_pid_nr(current), - (compat ? "compat " : ""), - syscall, KSTK_EIP(current)); -} - /** * get_u32 - returns a u32 offset into data * @data: a unsigned 64 bit value @@ -378,7 +366,6 @@ int __secure_computing_int(int this_syscall) default: break; } - seccomp_filter_log_failure(this_syscall); exit_code = SIGSYS; break; } @@ -390,7 +377,7 @@ int __secure_computing_int(int this_syscall) #ifdef SECCOMP_DEBUG dump_stack(); #endif - audit_seccomp(this_syscall); + audit_seccomp(this_syscall, exit_code); do_exit(exit_code); return -1; /* never reached */ } -- 1.7.0.4
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